HEATING VENTILATING AND AIR CONDITIONING 230000 - 1 10/2021 Environmental Systems Upgrades- SISD Aquatic Center Socorro Independent School District SECTION 230000 - HEATING, VENTILATING AND AIR CONDITIONING PART 1 - GENERAL 1.1 CONTENTS A. This section of the specifications contains items applicable only to the Heating, Ventilating and Air conditioning system. Section 22 05 00, Mechanical General Conditions and Section 22 07 00, Insulation for Mechanical Systems, contains items which also apply. This section of the specifications supplements and modifies some of the statements herein as to apply specifically to the heating, ventilating and air conditioning system. 1.2 SCOPE A. It is the intent of these specifications and drawings to furnish a heating, ventilating and air conditioning system inside and outside of the building, complete, fully adjusted and ready to use. All work and material must conform to all State and Local Codes in every respect. PART 2 - PRODUCTS 2.1 INSULATION A. Insulation shall be as specified in Section 22 07 00, Insulation for Mechanical Systems. 2.2 VALVES A. Valves shall be as specified in Section 22 05 00 Mechanical General Conditions. 2.3 SHEET METAL A. All ductwork shall be fabricated and installed so that no undue vibration or noise results. All joints shall be airtight with additional caulking provided if necessary. Ducts shall be constructed of the best grade galvanized mild steel sheets with joints and reinforcing in accordance with the recommended construction as listed in the current edition of HVAC Metal Duct Construction Standards - SMACNA. Ductwork installed between outlet of air handling units and terminal units shall be constructed to 4 “ water gage pressure class and sealed to class A sealing requirements. Ductwork downstream of terminal units, fan coil units, evaporative coolers, rooftop air conditioning units, make up air units, and downstream of exhaust fans shall be constructed to 1” water gage pressure class and sealed to class B sealing requirements. Hang ducts with straps attached to bottom of ducts spaced in accordance with SMACNA Standards. Curved elbows, if used, shall have a center line radius equal to 1-1/2 times the duct width. Square elbows shall have turning vanes equal to HEP Aerodyne Co. ducturns. Job fabricated vanes will not be accepted without prior approval. B. Provide all necessary dampers as required for proper adjustment and control of air distribution. Provide volume extractors similar to Metalaire Airtrol extractors set at 20 degrees at all branches in ductwork where other means of control are not indicated or used, and in ductwork behind sidewall supply registers. All damper rods shall be marked to indicate the relative position of the damper lade with respect to rod. C. Provide one inch (1") angle collars for all exposed ducts passing through walls, ceiling or floors. Anchor collars in position after installation is complete.
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HEATING VENTILATING AND AIR CONDITIONING 230000 - 1
10/2021 Environmental Systems Upgrades- SISD Aquatic Center Socorro Independent School District
SECTION 230000 - HEATING, VENTILATING AND AIR CONDITIONING
PART 1 - GENERAL
1.1 CONTENTS
A. This section of the specifications contains items applicable only to the Heating, Ventilating and
Air conditioning system. Section 22 05 00, Mechanical General Conditions and Section 22 07 00, Insulation for Mechanical Systems, contains items which also apply. This section of the specifications supplements and modifies some of the statements herein as to apply specifically to the heating, ventilating and air conditioning system.
1.2 SCOPE
A. It is the intent of these specifications and drawings to furnish a heating, ventilating and air
conditioning system inside and outside of the building, complete, fully adjusted and ready to use. All work and material must conform to all State and Local Codes in every respect.
PART 2 - PRODUCTS
2.1 INSULATION
A. Insulation shall be as specified in Section 22 07 00, Insulation for Mechanical Systems.
2.2 VALVES
A. Valves shall be as specified in Section 22 05 00 Mechanical General Conditions.
2.3 SHEET METAL
A. All ductwork shall be fabricated and installed so that no undue vibration or noise results. All
joints shall be airtight with additional caulking provided if necessary. Ducts shall be constructed of the best grade galvanized mild steel sheets with joints and reinforcing in accordance with the recommended construction as listed in the current edition of HVAC Metal Duct Construction Standards - SMACNA. Ductwork installed between outlet of air handling units and terminal units shall be constructed to 4 “ water gage pressure class and sealed to class A sealing requirements. Ductwork downstream of terminal units, fan coil units, evaporative coolers, rooftop air conditioning units, make up air units, and downstream of exhaust fans shall be constructed to 1” water gage pressure class and sealed to class B sealing requirements. Hang ducts with straps attached to bottom of ducts spaced in accordance with SMACNA Standards. Curved elbows, if used, shall have a center line radius equal to 1-1/2 times the duct width. Square elbows shall have turning vanes equal to HEP Aerodyne Co. ducturns. Job fabricated vanes will not be accepted without prior approval.
B. Provide all necessary dampers as required for proper adjustment and control of air distribution.
Provide volume extractors similar to Metalaire Airtrol extractors set at 20 degrees at all branches in ductwork where other means of control are not indicated or used, and in ductwork behind sidewall supply registers. All damper rods shall be marked to indicate the relative position of the damper lade with respect to rod.
C. Provide one inch (1") angle collars for all exposed ducts passing through walls, ceiling or floors.
Anchor collars in position after installation is complete.
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D. Provide flexible connection at inlet and discharge connections of fans and air handling equipment
to prevent mechanical noises from being transmitted to connecting ductwork. Use flexible connection similar and equal to "Ventfab".
E. Install hinged doors on ductwork and housing to provide access to all parts of every automatic
damper, fire damper and all other items requiring maintenance or inspection. Access doors shall be 18" X 12" if permitted by duct size, and if not, shall be as large as possible. All access panels shall have sponge rubber gaskets cemented in place with cam lock closures.
F. Shop Drawings shall be submitted on all items of sheet metal work specified herein. Shop Drawings
of ductwork at air units shall be submitted at a minimum scale of 3/8" equal to one foot.
G. Shop Drawings shall be submitted on all other ductwork. Shop Drawings shall indicate location of all
supply, return, exhaust and light fixtures from the approved reflected ceiling plans.
H. Provide sample drives, duct and guage thickness, and reinforcing requirements for Engineers approval.
2.4 SPIRAL/ OVAL DUCT AND FITTINGS
A. Spiral wound round and oval duct shall be made of galvanized steel. Spiral wound duct shall be manufactured in accordance with the latest editions of SMACNA, ASHRAE and SPIDA Standards.
B. All round and/or flat oval spiral duct and fittings shall be manufactured by a company whose
primary business is the manufacture of spiral duct and fittings...
C. All spiral duct and fittings shall be manufactured from G-60 galvanized steel meeting ASTM
A924 and A653 requirements.
D. Branch connections shall be made with 90º conical and 45º straight taps as shown on the
drawings. All branch connections shall be made as a separate fitting. Factory or field installation
of taps into spiral duct shall not be allowed without written approval of the engineer.
E. 90º and 45º elbows in diameters 3" round through 12" round shall be stamped or pleated elbows.
All other elbows shall be of the gored type. Where it is necessary to use two-piece mitered
elbows. All field joints for round duct up to and including 36" diameter and oval duct up to and
including 41” major axis shall be made with a 2" slip-fit or slip coupling. Diameters 38" round
and larger shall be provided with AccuFlange, or equal, flanged connections. AccuFlange, or
equal, flanged connections may also be used in lieu of slip connections on smaller sizes.
F. Access doors shall be supplied by the duct manufacturer at all fire and/or smoke dampers.
G. All exposed duct shall be double wall, acoustically insulated round/oval duct shall be supplied.
Double wall duct shall be constructed of an outer shell, a 1" thick layer of fiberglass insulation
and an inner metal liner. Insulation shall have a thermal conductivity "K" factor of .26 BTU/hr/sq.
ft./ºF or less.The inner metal liner for all spiral and longitudinal seam duct shall be perforated
metal. All fittings from fan discharge to a point where 35 lineal feet of spiral duct has been used
shall have a perforated metal liner. All other fittings shall have a solid metal liner, which may be
one even gauge lighter than that shown for perforated liners
H. Spiral duct shall be as manufactured by Sisneros Brothers, Spiral pipe of Texas, United McGill,
Duct Direct or approved equal.
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I. Exhaust duct from fume hoods shall be welded stainless steel.
2.5 FIBERGLASS DUCTBOARD
A. Fiberglass ductboard shall not be used on this project.
2.6 FLEXIBLE DUCT
A. Flexible duct connectors shall be constructed of galvanized spring-steel-wire helix with a two-ply
airtight inner core; nominal one inch (1") thick fiberglass insulation and vinyl vapor barrier, suitable to two inch (2") water gauge. Medium pressure duct connection to VAV box terminals shall be rated to a minimum 4” water gage. Entire duct assembly shall be listed to UL label and shall be Thermoid, Portoduct Type 1 or equal. Maximum length of each run shall be eight (5') feet and supported without sagging. Flex duct shall be allowed only where indicated on the drawings.
2.7 VIBRATION
A. Ductwork shall be isolated from rotating or reciprocating equipment to which it is attached by
means of a flexible connection. See sheet metal specification elsewhere herein for exact requirements. Equipment base isolators shall be provided where detailed on the drawings for equipment on floors, pads or bases.
2.8 GRILLES, REGISTERS, DIFFUSERS
A. Furnish and install grilles, registers, diffusers and accessories of size and type as indicated on
drawings. All to be as manufactured by Nailor, Metal-Aire, Carnes, Titus, or approved equal. See the schedule on the drawings for type and model.
2.9 EXHAUST FANS
A. Furnish and install roof-mounted exhausters as scheduled on the drawings. Exhaust fans shall be
all aluminum construction, belt-driven as indicated with birdscreen and backdraft dampers unless otherwise noted. Furnish an aluminum prefabricated curb, compatible with the exhauster where indicated. All exhaust fans shall be Acme, Cook, Jenn-Fan, Greenheck, Carnes, or approved equal. See control sequence for interlocks of fans with other equipment.
2.10 FIRE DAMPERS
A. Fire dampers shall be Ruskin dynamic type IBD2 “B” or low profile blade or approved equal.
Furnish and install, at locations shown on the plans, fire dampers instructed and tested in accordance with UL Safety Standard 555. Each fire damper shall have a 1-1/2 hour fire protection rating, 165 degree F. Fusible link, and shall include a UL label in accordance with established UL labeling procedures. Damper Manufacturer’s literature submitted for approval, prior to installation shall include comprehensive performance data developed from testing in accordance with AMCA Standard 500 and shall illustrate pressure drops for all sizes for dampers required at all anticipated air flow rates. Fire damper shall be equipped for vertical or horizontal installation as required by the location shown. Fire dampers shall be installed in wall and floor opening utilizing steel sleeves, angles, other materials, and practices required to provide an installation equivalent to that utilized by the Manufacturer when dampers are tested with UL labeling procedures. Installation shall be in accordance with the Damper Manufacturers
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instructions. All fire damper shall be approved as stated in SMACNA and the current ASHRAE Guide. Acceptable manufacturers are Ruskin, Nailor, Potoroff, or approved equal.
2.11 AIR CONDITIONING UNITS
A. Furnish and install high efficiency packaged electric cooling with gas heat designed to function as a year-round air conditioning systems. Units shall be completely assembled and tested complete with refrigerant charge and ready to operate.
B. Unit cooling and heating capacities shall be as scheduled. C. Unit compressor shall be welded, fully hermetic with crankcase heater and suitable vibration
isolators. The standard unit shall be capable of operating to 45 degrees F. OAT at published CFMs on cooling cycle. Compressors shall have a 5-year warranty. Compressor shall be equipped with factory installed crank case heater.
D. Indoor and outdoor coils shall be of nonferrous construction with aluminum fins mechanically
bonded to seamless copper tubes with all joints brazed.
E. Indoor air fan shall be forward curved centrifugal, belt-driven with adjustable pitch. Indoor fan
motor shall have permanently lubricated bearings. Outdoor fan shall be of the propeller type,
Unit cabinet shall be constructed of galvanized steel, bonderized and coated with a baked enamel
finish. Cabinet interior shall be insulated with 1/2 inch thick neoprene-coated fiberglass. Cabinet
panels shall be easily removable for service to all operating components. A condensate drain for
the indoor coil shall be provided. F. The cooling service shall be protected with low-pressure switch, loss-of-charge protection, indoor
coil freezestats and current and temperature sensitive overload devices. G. Each of these devices shall be wired through the circuit to prevent compressor restart until reset at
the thermostat. The standard room thermostat shall contain an indicating light designed to illuminate if any safety controls trip out the compressor through the lockout circuit.
H. Units listed in the schedule with heat shall be gas-fired () and heat exchangers shall be aluminized
steel. Combustion shall be induced draft with spark ignition. All units shall have factory installed economizer dampers.
I. Hail guard shall be provided for all condenser coils.
J. All Air Conditioning units shall be Trane, or Carrier.
2.12 BOILERS
A. Boiler for hot water heating system may be forced draft type natural gas-fired. The boiler shall
be copper fin type. The boiler shall be constructed in accordance with ASME requirements for
not less than 160 PSI working pressure but shall operate as a low pressure (60 PSI) water
boiler. Boiler shall be complete with gas burners, water tubes, headers, frame heavy insulation,
heavy gage steel, cabinet, headers, and controls; including EMCS interface and pump control.
Boiler controls shall include electric ignition with 100% safety shut-off, high limit control,
ASME rated (60 psi) relief valve, combination temperature and a pressure gage and low water
cut-off. Gas line shall be provided with manual main gas valve, dual electric gas valves, gas
pressure regulator, and pilot shut-off valve, UL listed. Boiler shall be equipped with electric
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modulating gas valve. Boiler shall have hot water trim and shall be complete with all
components specified herein and/or required for a complete operating unit. Boiler shall have
capacity not less than shown on the drawings at and elevation of 4000 ft. and shall be installed
in strict accordance with the manufacturer’s recommendations and all applicable codes. Boiler
shall be Raypak, or approved equal.
B. Provide field reports and startup checklist to be submitted to Engineer and Owner.
C. A factory authorized service representative shall test, inspect, and adjust boiler, boiler
components, equipment installation, and perform start-up services.
D. Perform installation and startup checks according to manufacturer’s recommendations.
E. Perform operational test: start units to confirm proper motor rotation and unit operation.
Adjust air-fuel ratio and combustion controls. Test and adjust controls and safeties. Replace
damaged and malfunctioning controls and equipment.
F. Perform burner test: adjust burner to eliminate excess oxygen, carbon dioxide, oxides of
nitrogen, and carbon monoxide in flue gas and to achieve rated combustion efficiency.
G. Adjust initial temperature set points. Set field adjustable switches and circuit breaker trip
ranges as indicated.
H. Prepare a written report that documents the testing procedures and their results.
I. Training shall be provided by factory authorized service representative to train maintenance
personnel on-site to adjust, operate, and maintain boilers. Four training manuals shall be
provided to School District personell during training.
2.13 HYDRONIC SYSTEMS PIPING
A. Hydronic hot water piping shall be type "L" hard drawn copper with wrought copper fittings
and 50 percent tin, 50 percent lead solder joints. At the Contractor's option silver solder may be substituted for 50/50 solder.
B. At the Contractor's option he may use schedule 40 black steel in place of copper pipe. Joints
shall be reamed to full pipe diameter before joining. Joints may be screwed, or if the pipe size is two (2") inches or larger, the joints may be welded at the Subcontractor's option. Welded joints shall be made in accordance with the procedure outlined in the USA Piping Code and each welder shall be certified by the National Certified Pipe Welding Bureau, or by another reputable testing laboratory or agency. The Subcontractor shall use only "Threadolet" or "Weldolet" fittings for intersection welding of branches to mains. Valves and specialties shall have screwed of flanged joints. Piping joints and fittings may be "Victaulic" style 77 or equal.
C. Underground hydronic piping shall be Ferro-therm or Copper-therm preinsulated piping system
by Thermacor or approved equal. 2.14 PUMPS A. The Contractor shall furnish and install pumps as scheduled on the plans. Acceptable
manufacturers are Taco, Armstrong, Paco, Aurora, or approved equal. The pumps shall be single stage, vertical in-line with split coupling design and bronze fitted construction. The pump internals shall be capable of being serviced without disturbing piping connections or motor.
B. The impeller shall be of the enclosed type, dynamically balanced and keyed to the shaft and
secured with a suitable locknut.
C. The pump seal shall be standard single mechanical seal with carbon seal ring and ceramic seat.
D. A replaceable shaft sleeve shall be furnished to cover the wetted area of the shaft under the seal.
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E. The bearing frame assembly of the pump shall be fitted with regreasable ball bearings equivalent to electric motor bearing standards for quiet operation.
B. A flexible coupler, capable of absorbing torsional vibration shall be employed between the pump
and motor and it shall be equipped with a suitable coupling guard as required. The pump shall be factory tested, thoroughly cleaned and painted with one coat of machinery enamel prior to shipment.
C. Starters shall be magnetic, full voltage, NEMA rated and sized, 3-pole, horsepower rated for the
applied voltage, 120 volt coil, NEMA 1 enclosure, H-O-A maintained selector switch, no momentary contact control devices, running time meter, LED pilot lights, overload relays sized at 125% of actual motor nameplate full load amps or as recommended by the motor manufacturer. Square D class 8536 or approved equal. Starters shall be reversing, non-reversing or 2-speed as indicated. Two speed starters shall be compatible with the motors to be controlled. Minimum size shall be NEMA size 1
2.15 BOILER BREECHING
A. Boiler breeching shall be Type B double wall vent. A minimum of one inch (1”) air space
between the inner and outer walls shall be provided and the stack shall be terminated above the
roof according to all local code requirements. All inner pipe shall be aluminum and outer pipe
shall be galvanized steel. All exposed metal is to be protected by one base coat and one finish
coat of heat and corrosion resistant primer and paint.
2.16 GAGES
A. Gages shall be Trerice model 450 or approved equal with an accuracy of one percent (1%) of the
scale range. The scale shall be of bourdon tube type with a scale range of 0 to 50 PSI or 0 to 100 feet.
2.17 GAGE COCKS AND MANUAL AIR VENTS
A. Gage cocks and manual air vents shall be Bolton 150 or approved equal.
2.18 THERMOMETERS
A. Furnish and install industrial thermometers where shown on the plans. Thermometers shall be
equal to a Trerice model A409 adjustable angle 12” scale or equal with separate well.
2.19 VARIABLE REFRIGERANT FLOW SYSTEM
A. The variable capacity, heat pump heat recovery air conditioning system shall be a Mitsubishi Electric CITY MULTI VRF (Variable Refrigerant Flow) zoning system.
B. The R2-Series system shall consist of a PURY outdoor unit, BC (Branch Circuit) Controller, multiple indoor units, and M-NET DDC (Direct Digital Controls). Each indoor unit or group of indoor units shall be capable of operating in any mode independently of other indoor units or groups. System shall be capable of changing mode (cooling to heating, heating to cooling) with no interruption to system operation. To ensure owner comfort, each indoor unit or group of indoor units shall be independently controlled and capable of changing mode automatically when zone temperature strays 1.8
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degrees F from set point for ten minutes. The sum of connected capacity of all indoor air handlers shall range from 50% to 150% of outdoor rated capacity.
C. The control system shall consist of a low voltage communication network of unitary
built-in controllers with on-board communications and a web-based operator interface. A
web controller with a network interface card shall gather data from this system and
generate web pages accessible through a conventional web browser on each PC
connected to the network. Operators shall be able to perform all normal operator
functions through the web browser interface. PART 3 - EXECUTION
3.1 WORKMANSHIP
A. All work shall be first-class in every respect and shall be done by mechanics skilled in the trade
involved. Careless and/or sloppy work shall be resolved and replaced properly at the Contractor's expense.
3.2 SCHEDULING OF WORK
A. The Contractor shall be required to confer with the Architect, General Contractor and Owner to
determine a schedule of times at which the various items of work are to be accomplished.
3.3 CONSULTATION WITH OTHER CONTRACTORS
A. Before commencing the work, the Contractor shall consult with the General Contractor and other
Subcontractors and arrive at a thorough understanding as to the location of all equipment, ducts, etc., so that there will be no interference with other work. The time of installation of sleeves, etc. shall be determined by the Contractor. In the event he should fail to have material on the job and such provisions are not made previously with the Gen. Contractor, necessary arrangements shall be made at the expense of the Contractor.
3.4 FILTERS
A. All equipment introducing outside air shall be provided with a set of filters for construction, a set
of filters for test and balance/commissioning, and a final set of filters when commissioning and
test and balance is complete. A fresh set of filters is to be provided following an re-testing of
equipment.
3.5 CLEANING, FLUSHING AND WATER TREATMENT OF WATER SYSTEMS
A. Water circulating Systems shall be thoroughly cleaned before placing in operation to rid
systems of rust, dirt, piping compound, mill scale, oil, grease, any and all other material
foreign to water being circulated.
B. Extreme care shall be exercised during construction to prevent dirt and other foreign
matter from entering the pipe or other parts of systems. Pipe stored on the project shall have open
ends capped and equipment shall have openings fully protected. Before erection, each piece of
pipe, fitting, or valve shall be visually examined and dirt removed.
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C. At pipe end locations a temporary bypass will be installed. Bypass shall be same size as the
supply and return pipe. Prior to flushing the distribution system, the Contractor shall install the
temporary bypass and a temporary line size strainer between the supply and return pipes.
Contractor shall verify that the isolation valves are open.
D. After the temporary bypasses are installed, the Contractor shall provide and operate one pump
which will cause a velocity of 10 feet per second in the main piping. This pump will be provided
with a shot chemical feeder and a strainer assembly. Pump shall be connected to system at the
point where piping goes into the building from the tunnel. If the pump is electric driven, rather
than engine driven, the Contractor shall provide all temporary electrical disconnects, wiring,
fuses, and other electrical devices that are required for safe operation.
E. Circulation will be started using the temporary pump. A nonhazardous cleaning compound (Entec
324 or approved equal) shall be added using the shot feeder until the concentration level of 20
parts per million is reached. Once this 20 parts per million concentration is reached, circulation
will be maintained for 48 hours. After this period of time, the cleaning water shall be dumped to
the sanitary sewer.
F. The distribution system will then be refilled with city water and circulated with continual bleed
and make-up until the water is certified clean by the water treatment consultant, El Paso
Corrosion, and accepted by the Owner. At the completion of this step an inhibitor shall be
introduced. All waste water shall be dumped into the sanitary sewer system.
G. After the system is certified as clean, the Contractor shall close the valves. The bypass piping
shall be removed as final connections to the building are accomplished.
H. During the flushing procedure, strainers shall be cleaned as often as necessary o remove debris
and, in any event, all strainers shall be cleaned by physically removing the strainer screen from
the body of the strainer at the end of flushing. Replace strainer basket and gasket. Contractor shall
not flush through control valves, coils, etc. Contractor shall provide temporary bypasses at coils
and spool pieces at control valves. Flush the coils individually wasting water to sanitary sewer.
Connect coils and install control valves after flushing.
I. Test samples shall be taken and all tests shall indicate that the entire system has reached a PH,
conductivity, and chemical concentration level as approved by the Owner. Contractor shall
purchase needed chemicals from chemical treatment supplier.
J. Hot Water Heating Systems
1. Hot Water Heating Specifications:
a. Contractor shall provide all chemicals required to maintain the
system for 1 year from final acceptance.
b. During the first two months of operation the contractor shall visit
the site weekly and make appropriate adjustments to maintain the
levels outlined below.
c. Weekly field reports shall be issued to the owner through the
Consultant.
d. After the 2 months, a site visit and adjustment shall be required
monthly.
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e. Reports shall be sent through the consultant for reviewed
forwarded to the owner.
2. Treatment Program Requirements:
a. Chemical will be a borate buffered nitrite formulation.
b. Following residuals and controls to be maintained:
i. 800-1,000 ppm as sodium nitrite formulation.
ii .5-1.0 ppm active Triazole
iii 9.5-10.0 pH
c. System water will not exhibit a hydrate alkalinity reading.
d. Other chemicals may be prepared but require prior approval from
consultant and owner. 3.6 CLEANING, TESTING AND ADJUSTING
A. The Contractor is cautioned to instruct his mechanics to keep all equipment, ducts an materials
free of foreign materials during installation. Any malfunction of the several system resulting from sand, rocks and other foreign material in the systems shall be corrected at the Contractor's expense. Upon completion of the work, the Contractor shall thoroughly cleanout the several duct system. The Contractor shall take precaution during the cleaning operation to protect his work and the work of all other traces and should any damage be done, he shall remedy or repair it to the complete satisfaction of all concerned, and at no additional cost to the Owner.
B. Functional Tests: Make specific tests of all equipment and materials and portions of this
installation as required herein to prove their condition and performance and any tests as required by any authority having jurisdiction over this type of installation. The Contractor shall adjust all equipment, air quantities, controls and devices, so that all components of the various systems are left in proper working order. As part of this test the entire piping system shall be pressurized to 100 PSI for four (4) hours. These tests must be witnessed by a representative from the Engineer's office. All hydronic piping to be flushed out and chemical added.
3.7 START UP
A. It is the responsibility of the Mechanical Contractor to arrange a minimum two (2) day start-up
program. A factory representative for the Owner, the Engineer, and the Mechanical Contractor
shall be on the site. The purpose of this start-up is to run the system thoroughly and determine
that it is functioning satisfactorily. If for some reason the start-up cannot be completed the
program will be rescheduled and the system will be run to the satisfaction of the Engineer at no
additional cost to the Owner. The entire cost of the start-up program shall be included in the
contract.
B. Contractor shall use attached forms for major pieces of equipment. It is the School Districts
requirement all information be filled in prior to acceptance of project.
3.8 OPERATING AND MAINTENANCE MANUALS:
1. Three binders shall be submitted to mechanical consultant. Consultant shall review and
approve then submit the 3 copies to the owner.
2. Operating and maintenance manuals shall include the following systems:
a. Mechanical systems
b. Plumbing systems
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c. Fire protection systems
d. Energy/management control systems (EMCS)
3. All components specified and/or scheduled of the above systems shall require O&M
manuals and shall be identified according to the specifications and/or schedule
identification mark/label.
4. Basic information required for O&M manuals:
a. Operating routines and procedures:
Control sequences
Temperature set points
Control diagrams
Ventilation requirements
5. Start-up and shut-down procedures i.e. checklist for start-up/shut-down
a. Equipment/fixture specific information
Identification mark/label
Manufacturer name
Model #
Etc.
b. Trouble shooting section
c. Preventive maintenance program including frequency of actions
d. Scheduled maintenance programs including frequency of actions
e. Parts lists with local vendors (multiple if available)
6. Manuals shall be submitted and approved by mechanical consultant prior to substantial
completion acceptance.
3.9 SHOP DRAWINGS
Submit shop drawings on the following:
1. Spiral Duct, 2. All sheet metal ductwork 3. Flex Duct, 4. Grilles, Registers, Diffusers, 5. Fire Dampers, 6. Exhaust fans, 7. Energy Recovery Ventilators, 8. Air conditioning Units, and 9. VRF systems.
END OF SECTION 23 00 00
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SECTION 23 05 00 – COMMON WORK RESULTS FOR MECHANICAL
PART 1 - GENERAL 1.1 SCOPE
A. The scope of the work included under this Division of the specifications shall include a complete
mechanical system as shown on the plans and as specified herein. The Architectural General Conditions of these specifications shall form a part and be included under this section of the specifications. The Mechanical Contractor shall provide all supervision, labor, material, equipment, machinery, plant and any and all other items necessary to complete the mechanical system. All other items of equipment are specified in the singular; however, the Mechanical Contractor shall provide and install the number of items of equipment as indicated on the drawings, and as required for complete systems.
B. It shall be noted that work under this section of the specifications includes: Heating, Ventilating
and Air Conditioning, 23 00 00; Mechanical General Conditions, 23 05 00, Insulation for Mechanical Systems, 23 07 00; Test and Balance, 23 05 93;
PART 2 - MATERIALS 2.1 CODES, RULES, PERMITS, FEES
A. The Mechanical Contractor shall give all necessary notices, obtain all permits and pay all
government and state sales taxes, fees, and other costs, including utility connections or extensions, in connection with his work; file all necessary plans, prepare all documents and obtain all necessary approvals of all governmental departments having jurisdiction; obtain all required certificates of inspection for his work and deliver same to the Architect before request for acceptance and final payment for the work. The Mechanical Contractor shall include in the work, without extra cost to the Owner, any labor, materials, services, apparatus, drawings, in order to comply with all applicable laws, ordinances, rules and regulations whether or not shown on drawings and/or specified. Refer to General Conditions for additional information.
B. All materials furnished and all work installed shall comply with the National Fire Codes of the
National Fire Protection Association, with the requirements of all governmental departments having jurisdiction. All materials and equipment for the electrical portion of the mechanical system shall bear the approval label, shall be listed by the Underwriters Laboratories, Inc. and bear the UL label. All mechanical equipment, electrical wiring, and devices shall be in accordance with the National Electric Code (NEC).
2.2 INTENT
A. It is the intention of these specifications and drawings to call for finished work, tested, and ready
for operation. Wherever the word "provide" is used, it shall mean "furnish and install complete and ready for use". Details not usually shown or specified, but necessary for the proper installation and operation, shall be included in the work, the same as if herein specified or shown.
2.3 SURVEYS AND MEASUREMENTS
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A. The Mechanical Contractor shall base all measurements, both horizontal and vertical from established benchmarks. All work shall agree with these established lines and levels. Verify all measurements at site and check corrections of same as related to the work. Should the Mechanical Contractor discover any discrepancy between actual measurements and those indicated, which prevents following good practice or the intent of the drawings and specifications, he shall notify the Architect, through the General Contractor, and shall not proceed with his work until he has received instructions from the Architect. The Contractor must carefully locate and verify all of the existing utilities to be used as a part of this contract.
2.4 DRAWINGS
A. Drawings are diagrammatic and indicate the general arrangement of systems and work included
in the contract. Drawings are not to be scaled. The architectural drawings and details shall be examined for exact locations of fixtures and equipment. Where they are not definitely located, this information shall be obtained from the Engineer, before he proceeds with the work. The Mechanical Contractor shall follow drawings in laying out work and check drawings of other trades to verify spaces in which work will be installed. Maintain maximum headroom and space conditions at all points. Where headroom or space conditions appear inadequate the Architect shall be notified before proceeding with installation.
2.5 "OR EQUAL"
A. Wherever the words "approved equal", "equal", or words to the same effect are used in
connection with any specified material, it is to be understood that such words mean any material or work of any kind claimed to be an equal in quality to the work or material specified and shall be so approved in writing by the Engineer, except as noted. It is further understood that no material or work shall be presented to the Engineer as work or material equal to that specified without the full understanding on the part of the manufacturers and agents for the so-called "equal" material, and the full understanding on the part of the contractors, that the Engineer is to use his own judgment in the matter; that his decision is final, and that in the event of an adverse condition, no claim of any sort shall be made against the Owner or Architect or Engineer.
2.6 SHOP DRAWINGS
A. The Mechanical Contractor shall submit for approval detailed shop drawings of all equipment and
all material required to complete the project, and no material or equipment may be delivered to the jobsite or installed until the Mechanical Contractor has in his possession the approved shop drawings for the particular material or equipment. The shop drawings shall be complete as described herein. The Mechanical Contractor shall furnish the number of copies required by the General and Special Conditions of the contract, but in no case less than four (4) copies. Prior to delivery of any material to the jobsite, and sufficiently in advance of requirements to allow the Architect ample time for checking, submit for approval: detailed, dimensions, operating clearances, performance characteristics and capacity. Each item of equipment proposed shall be a standard catalog product of an established manufacturer and of equal quality, finish and durability to that specified.
B. The Mechanical Contractor shall submit for approval detailed ductwork and mechanical room
layout shop drawings; showing coordination between disciplines, see above for submission
requiredments.
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2.7 EQUIPMENT DEVIATIONS
A. Where the Mechanical Contractor proposed to use an item of equipment other than that specified
or detailed on the drawings, which required any redesign of the structure, partitions, foundations, piping, wiring or any other part of the mechanical, electrical or architectural layout, all such redesign, and all new drawings and detailing required therefore, shall be prepared by the Mechanical Contractor at his own expense and approved by the Architect. Where such approved deviation requires a different quantity and arrangement of ductwork, piping, wiring, conduit and equipment from that specified or indicated on the drawings, the Mechanical Contractor shall furnish and install any such ductwork, piping, structural supports, insulation, controllers, motors, starters, electrical wiring and conduit, and any other additional equipment required by the system at no additional cost to the Owner.
2.8 COOPERATION WITH OTHER TRADES
A. The Mechanical Contractor shall give full cooperation to other trades and shall furnish in writing
to the Contractor, with copies to the Architect, any information necessary to permit the work of all trades to be installed satisfactorily and with the least possible interference or delay.
2.9 PROTECTION
A. The Mechanical Contractor shall protect all work and material from damage by his workmen, and
shall be liable for all damage thus caused and replace all damaged materials at no cost to the Owner. The Mechanical Contractor shall be responsible for work and equipment until finally inspected, tested and accepted. He shall protect work against theft, injury or damage, and shall carefully store material and equipment received on-site which is not immediately installed. He shall close open ends of work with temporary covers or plugs during storage and construction to prevent entry of obstructing material.
2.10 SCAFFOLDING, RIGGING, HOISTING
A. The Mechanical Contractor shall furnish all scaffolding, rigging, hoisting and services necessary
for erection and deliver onto the premises any equipment and apparatus furnished. The Contractor will remove the necessary equipment from the premises when no longer required.
2.11 EXCAVATION AND BACKFILLING
A. Mass excavation to approximate building levels will be carried out under a section of the
architectural specifications. The Mechanical Contractor shall; however, do all trench and pit excavation and backfilling required for work under this section of the specifications, inside and outside the building, including repairing of finished surfaces, all required shoring, bracing, pumping and all protection for safety of persons and property. Local or State Safety Codes shall be strictly observed. In addition, it shall be the responsibility of the Mechanical Contractor to check the indicated elevation of the utilities entering and leaving the building. If such elevations require excavations lower than the footing levels, the Architect shall be notified of such conditions and a redesign shall be made before excavations are commenced. It is also the responsibility of the Mechanical Contractor to make the excavations at the minimum required depths in order not to undercut the footing. Filling, backfilling and compaction shall be as specified under the architectural sections of these specifications.
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B. Backfill may be native material except that all material from six inches (6") below the pipe bottom to six inches above the top of the pipe must pass a 3/4" sieve. If the native material is determined to be too rocky by the Engineer, he may require imported material for pipe bedding.
2.12 MATERIALS AND WORKMANSHIP
A. All materials and apparatus required for the work, except as specifically specified otherwise, shall
be new, of first-class quality, and shall be furnished, delivered, erected, connected and furnished
in every detail, and
shall be so selected and arranged as to fit properly into the building spaces. Where no specific
kind or quality of material is given a first-class standard article as approved by the Architect shall
be furnished. The Mechanical Contractor shall furnish the services of an experienced
superintendent, who shall be constantly in charge of the installation of the work, together with all
skilled workmen, fitters, metal workers, welders, helpers, and labor required to unload, transfer,
erect, connect, adjust, start, operate and test each system.
B. Unless otherwise specifically indicated on the plans or specifications all equipment and materials shall be installed with the approval of the Engineer in accordance with the instructions of the manufacturer. This includes the performance of such tests as the Manufacturer instructs.
2.13 MOTORS
A. Motors shall be built in accordance with the latest standards of NEMA and as specified. Motors
shall be tested in accordance with standard of A.S.A., C50 and conform thereto for insulation resistance and dielectric strength. Provide motors manufactured by General Electric, Westinghouse, Allis Chalmers or Century designed for quiet continuous operation with forty (40) degrees C. rise at full load and rated speed as individually specified. Motors shall be of the same make except those incorporated in package units, and all, including those in package units, shall be provided with ball bearings and conduit connection boxes. Unless stated otherwise, motors 1 HP and smaller shall be suitable for operation of single phase, 60 cycle, and 120 volt current. All motors shall be provided with thermal overload protection. Motors 1 HP or larger shall be either 208 volt or 480 volt, three phase as scheduled. Two speed, three phase motors shall be dual winding.
B. All motor starters shall be provided by the Mechanical Contractor if integral with the equipment.
All three phase magnetic starters shall be furnished with three coil overload protection. All starters which are not integral with the equipment and other electrical control equipment installed in damp, moist or areas of special conditions, shall be designed and approved for the installation.
2.14 QUIET OPERATION AND VIBRATION
A. All work shall operate under all conditions of load without any sound of vibration which is
objectionable in the opinion of the Architect/Engineer. In case of moving machinery, sound or vibration noticeable outside its own room will be considered objectionable. Sound or vibration conditions considered objectionable by the Architect shall be corrected in an approved manner by the Mechanical Contractor at his expense. Vibration control shall be by means of approved vibration eliminators in a manner as recommended by the manufacturer of the eliminators.
2.15 ACCESSIBILITY
A. The Mechanical Contractor shall be responsible for the sufficiency of the size of shafts and
chases, the adequate clearance in double partitions and hung ceilings for the proper installation of
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his work. The Contractor shall cooperate with the General Contractor and all other contractors whose work is in the same space, and shall advise the General Contractor of his requirements. Such spaces and clearances shall; however, be kept to the minimum size required. The mechanical Contractor shall locate all equipment which must be serviced, operated or maintained in fully accessible positions. Equipment shall include but not be limited to: valves, traps, cleanouts, motors and controllers. If required or better accessibility, any change shall be approved by the Architect. The Mechanical Contractor shall provide the General Contractor the exact locations of access panels for each concealed valve, control, damper or other device requiring service. Access panels not shown in the architectural drawings shall be provided and installed by the Mechanical Contractor and as specified in architectural sections of the specifications. Locations of these panels shall be submitted in sufficient time to be installed in the normal course of work
2.16 FOUNDATIONS, SUPPORTS, PIERS, ATTACHMENTS
A. The Contractor shall furnish and install all necessary foundations, supports, pads and bases
required for all equipment furnished under this contract, unless otherwise noted. All equipment where foundations are indicated, furnish and install concrete pads as shown. All pads shall be extended six inches (6") beyond equipment base in all directions with top edge chamfered. All equipment, unless otherwise shown, shall be securely attached to the building structure in an approved manner. Attachments shall be of a strong and durable nature and any attachments that are, in the opinion of the Architect, not strong enough shall be replaced as directed.
2.17 ELECTRICAL CONNECTIONS
A. The Electrical Contractor shall furnish and install all power wiring except the following when
rated at 25 VAC or less: (1) temperature control wiring; (2) equipment control wiring; and (3) interlocking wiring. The Electrical Contractor shall furnish and install all power wiring complete from power source to motor or equipment junction box, including power wiring through starters. The Electrical Contractor shall furnish and install all starters not factory mounted on equipment or otherwise noted. The Mechanical Contractor shall furnish and install all temperature control wiring, interlock wiring and equipment control wiring of 25 VAC or less for the equipment that he furnishes. The Mechanical Contractor shall furnish a starter to the Electrical Contractor, where scheduled on the drawings or integral with the equipment. The Mechanical Contractor shall provide and be responsible for the heater in all starters that the Mechanical Contractor furnishes.
2.18 CUTTING AND PATCHING
A. The Mechanical Contractor shall be responsible for all framing, cutting and patching necessary to
install the work specified in this section. Patching shall match adjacent surfaces and be performed by qualified workmen approved by the Architect. All work shall be in accordance with the applicable Architectural section of these specifications.
2.19 SLEEVES AND PLATES
A. The Mechanical Contractor shall provide and locate all sleeves and inserts required before the
floors and walls are built, or shall be responsible for the cost of cutting and patching required for pipes where sleeves and inserts were not installed, or where incorrectly located, or where they are to be installed in existing walls. Sleeves shall be provided for all mechanical piping passing through concrete floor slabs, masonry, concrete, tile and gypsum wall construction. Where
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sleeves are placed in exterior walls below grade, the space between the pipe or conduit and the sleeves shall be sealed with link-seal rubber expansion sealers or equal and be made completely watertight. Sleeves shall be constructed of twenty-four (24) gauge galvanized sheet metal with lock seam joints for all sleeves set in concrete floor slabs terminating flush with the floor. All other sleeves shall be constructed of steel pipe unless otherwise indicated on the drawings.
2.20 ESCUTCHEON PLATES
A. Escutcheon plates shall be provided for all exposed uninsulated pipes and all exposed conduit passing through walls, floors and ceilings. Plates shall be nickel-plated, of the split ring type, sized to match the pipe or conduit. Where plates are provided for pipes passing through sleeves which extend above the floor surface, provide deep recessed plates to conceal the pipe sleeves.
2.21 WATERPROOFING
A. Where any work pierces waterproofing including waterproof concrete, the method of installation
shall be as approved by the Architect before work is done. The Mechanical Contractor shall furnish all necessary sleeves, caulking and flashing required to make openings absolutely watertight.
2.22 GUARDS
A. The Mechanical Contractor shall provide belt drivers and rotating machinery with readily
removable guards. Guards not furnished with equipment requiring it shall consist of heavy angle iron frames, hinged and latched, with heavy galvanized iron wire crimped mesh securely fastened to frames.
2.23 OPERATING INSTRUCTIONS
A. Upon completion of all work and all tests, the Contractor shall furnish the necessary skilled labor
and helpers for operating this system and equipment for a minimum period of three (3) days of eight (8) hours each. During this period, instruct the Owner or his representative fully in the operations, adjustment, and maintenance of all equipment furnished. The Mechanical Contractor shall furnish to the Architect four (4) complete bound sets for delivery to the Owner of typewritten or blueprinted instructions for operating and maintaining all systems and equipment included in this contract. All instructions shall be submitted in draft, for approval, prior to final issue. Mount at a location determined by the Owner, a step-by-step procedure to operate the system in a frame covered with a glass front. The Mechanical Contractor shall include the maintenance schedule for the principal items of equipment furnished under this contract.
2.24 PIPING INSTALLATION
A. All piping at one or more points shall be installed so that they can be easily drained. Provide
means of drainage of low points of all piping without disconnecting pipe. If other than valves are contemplated, the Architect's permission shall be obtained. All installed pipelines shall be straight and remain straight against strains tending to cause distortion, noise, damage, or improper operation. Piping shall be installed square with the building construction and risers shall be plumb. All piping must be kept clean and free from scale or loose dirt when installed, and must be keep clean during the completion of the installation. All openings in the piping system shall be capped or plugged while awaiting further connection whenever there is a reasonable hazard of
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dirt entering the piping system. Soil, waste and drainage lines shall be properly graded. Cold water, domestic hot water and gas lines shall be slightly pitched toward drain points.
2.25 PIPE HANGERS AND SUPPORTS
A. Horizontal piping shall be suspended from the overhead structure with Grinnell Co. pipe hangers
and anchors and threaded rods. Perforated metal straps will not be allowed on the job. Hangers shall be installed to allow for continuity of insulation. Maximum hanger spacing shall be six feet (6').
2.26 VALVES
A. Unless otherwise specified, all valves shall be Stockham, Nibco-Scott, Crane or Milwaukee. B. Domestic water use suitable for l25 PSI working pressure. Ball or butterfly valves shall be used
on domestic water piping.
C. Ball valves or cast iron greaseable plug valves shall be used in gas lines.
D. Balancing and/or Shutoff Valves for Hydronic Water Systems: Two inches and smaller, three piece full port bronze body ball valve, chrome plated bronze ball and stem. Teflon seats, packing and gasket, bronze gland follower, adjustable stuffing box, steel lever type handle, with plastic sheathed operating handle, adjustable memory stops, and shall be class 150 SWP/600 WOG, screwed pattern. Manufacturer shall certify ball valves for use in throttling service. Stem extensions shall be furnished for use in insulated lines. Cold water service valves shall be as above, except two piece construction. Valves 2 1/2" and larger shall be tapped full lug butterfly valves with aluminum bronze discs of ASTM B148 Alloy C955 and 316, 416, or 420 stainless steel shafts. Design must incorporate bushing between shafts and body of material suitable to provide a bearing surface to eliminate seizing or galling. Valve must be capable of providing a bubble tight seal at 200 psi for valves up to 12" (150 psi for larger valves) when used for end of line service without requiring the installation of a blind flange on the downstream side. Liners shall be resilient material suitable for 225 °F temperature and bodies of ductile iron. Butterfly valves 8" and larger and butterfly valves used for balancing service, regardless of size, shall have heavy duty weather proof encased gear operators, with malleable iron handwheel or crank. Valves 2 1/2" through 6" shall have lever handles which can be set in interim positions between full open and full closed. All butterfly valves shall be absolutely tight against a pressure differential of 150 psi..
E. Valve locations are either shown or covered by note on the plans. However, the Contractor shall
be held responsible for furnishing and installing all valves inadvertently omitted from the drawings in locations where valves are customarily furnished for operation and maintenance without undue disruption of service.
F. The Mechanical Contractor shall prepare and install in a suitable glazed frame, typewritten valve
charts giving the number, location and function of each line and valve installed under this contract. Provide and install for each valve a stamped brass tag, numbered to correspond to the number indicated on the valve chart. Tags shall be secured to valve stems by heavy, figure-eight hooks.
2.27 UNIONS
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A. Unions shall be provided at all equipment and wherever else necessary to allow for ease in
making repairs or replacements. Furnish and install approved insulating couplings at all
connections between dissimilar metals, steel to copper. 2.28 INSTALLATION OF THREADED PIPE
A. Screw joints shall be made with lubricant applied to the male threads only; threads shall be full
cut and not more than three (3) threads on the pipe shall remain exposed. All new cut ends must be deburred and reamed.
2.29 JOINTS IN COPPER WATER PIPING
A. The pipe shall be cut square and true. The end shall be deburred, reamed, and/or sized as
necessary. The pipe shall be cleaned with medium grit emery cloth and if the fitting socket is tarnished or shows oxidation, it shall be likewise cleaned. The pipe and fitting shall be fluxed with Nokorode Paste. Joints shall be made up with the type of solder as hereinafter specified. Reducing tees formed by extruding the larger pipe will not be acceptable for pipe two (2") inches or smaller. On pipe 2-1/2 inches and larger extruding the reducing tee will be acceptable provided flux is applied to both tee and pipe and the joint silver soldered with a torch using a mixture of oxygen and acetylene.
2.30 IDENTIFICATION OF PIPING
A. All service piping which is accessible for maintenance operations will be identified with
SETMARK semi-rigid plastic markers or equal. Direction of flow arrows are to be included on each marker, unless otherwise specified. For pipes under 3/4" OD, brass identification tags 1-1/2" in diameter will be fastened securely at specified locations.
B. Locations for pipe markers to be as follows:
At each pipe passage through wall, floor and ceiling construction. At each pipe passage to underground. On all horizontal pipe runs - marked every 15 feet. At each branch and riser take-off. Adjacent to each valve and fitting (except on plumbing fixtures and equipment) C. Provide ceiling tack markers at all location of equipment located within ceiling space. Including
terminal units, fan coil units, etc…
PART 3 - EXECUTION 3.1 SYSTEM TEST AND CLEANING
A. Scope: Before the final air balance test, the heating, ventilating and air conditioning system
shown on the drawings shall be tested to assure performance of all units. District personnel to be present during startup
procedures.
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B. Heating System: The entire heating system shall be tested at the completion of the building and it shall be established that all controls are calibrated accurately and performing satisfactorily and that all units are heating satisfactorily. The system shall be checked for vibration and excessive noise and all such conditions corrected.
C. Air Conditioning System: The entire air conditioning system shall be tested at the first summer weather next following the completion of the building; and it shall be established that all controls are calibrated accurately and performing satisfactorily and that all units are cooling satisfactorily. The system shall be checked for vibration and excessive noise and all such conditions corrected.
D. Ventilating System: The entire ventilation system shall be tested at the completion of the project;
and it shall be established that controls are performing satisfactorily and that all rooms are ventilating properly. The systems shall be checked for vibration and excessive noise and all such conditions corrected.
E. Final Check-up: At the completion of all work all equipment on the project shall be checked and
thoroughly cleaned including coils, plenums, pipes, plumbing fixtures, etc., and all other areas around or in equipment provided under this section. Any filters used during construction shall be replaced with new filters after final clean up. All start-up strainers shall be removed and replaced with operating strainers. Strainer mesh shall be approved by the Engineer.
F. Painting: At the completion of all work all equipment on the project shall be checked for painting
damage, and any factory finished paint that has been damaged shall be repaired to match the adjacent areas. Any metal or specially covered areas that have been deformed shall be replaced with new material and repainted to match the adjacent areas.
3.2 LUBRICATION OF EQUIPMENT
A. The Mechanical Contractor shall properly lubricate all pieces of equipment before turning the
building over to the Owner. He shall attach a tag to each motor showing the date of lubrication and lubricant needed.
3.3 GUARANTEE
A. The entire mechanical system shall be guaranteed for a period of one year after final acceptance of
the project against any defects in equipment, material or workmanship. Any necessary labor, equipment or material required to correct such defects shall be furnished and paid for by the Mechanical Contractor without further cost to the Owner. Provide the Owner a written guarantee on the above item. Deliver to the Architect for his approval.
END OF SECTION 23 05 00
TEST AND BALANCE 230593 - 1
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SECTION 23 05 93 TEST AND BALANCE
PART I - GENERAL
1.1 SCOPE
A. This section covers the testing and balancing of environmental system including but not limited
to: air distribution systems, hydronic distribution system and the equipment and apparatus
connected thereto.
B. The work required herein shall consist of setting volume (flow) and speed adjusting facilities
provided or specified for the systems, recording data, making tests and preparing reports, all as
hereinafter specified.
1.2 GENERAL REQUIREMENTS
A. The work described in this section shall be performed by a firm(s) certified by the National
Environmental Balancing Bureau. If the Installing Contractor is not certified by the NEBB, he
shall submit appropriate data indicating experience and qualifications.
PART 2 - PROCEDURE
2.1 PROCEDURES
A. The environmental systems including all equipment, apparatus and distribution system shall be
tested and balanced in accordance with the NEBB “Procedural Standards for Testing Adjusting
and Balancing of Environmental Systems” published by the NEBB, Current Edition.
B. All work performed under this section shall be under the direction of the supervisor who is
designated and qualified under the certification requirements of NEBB.
C. All instruments used for measurement shall be accurate, and calibration histories for each
instrument shall be available for examination. Calibration and maintenance of all instruments
shall be in accordance with the requirements of NEBB.
D. Accuracy of measurement shall be in accordance with NEBB standards.
E. General Information
1. The Testing, Adjusting, and Balancing (TAB) Contractor shall be independent from the
controls contractor and equipment sales representative for the specific construction
project.
2. The contractor shall test adjust and balance the following mechanical systems.
a. Supply air systems
b. Return air systems
c. Exhaust air systems
d. Chilled water systems
e. Heating water systems
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f. Verify energy management control systems (EMCS)
3. A certified NEBB or AABC TAB supervisor must be onsite at all times during TAB
work to completely oversee the testing, adjusting, and balancing of the system.
4. A pre-balance conference shall take place between the mechanical engineer, mechanical
contractor, controls contractor, electrical contractor and possibly the owners
representative prior to beginning of the testing, balancing and adjusting. Discussion
shall focus on the verification that the system is ready or TAB work.
5. TAB work shall be completed with final report prior to the completion of the pre-punch
checklist for equipment.
6. Field reports shall be issued to mechanical contractor and mechanical consultant directly
form TAB contractor regarding deficiencies in the system that prevent proper TAB work
as well as proper system operation.
7. Preliminary and final reports shall be outlined by mechanical consultant regarding
submission of data and formatting requirements.
8. Calibration of instruments and balancing tolerances to be outlined by mechanical
consultant.
9. Preliminary data shall include the following information with deficiencies reported on
field reports.
F. AIR SYSTEM BALANCING
1. Review design drawings and specifications and become thoroughly acquainted with the
design intent.
2. Walk the system from the system air handling equipment to terminal units to determine
variations of installation from design.
3. Check filters for cleanliness.
4. Check dampers for correct and locked position, and temperature control for completeness
of installation before starting fans.
5. Prepare report test sheets for both fans and outlets. Obtain manufacturer’s outlet factors
and recommended procedures for testing. Prepare a summation of required outlet
volumes to permit a cross-check with required fan volumes.
6. Determine best locations in main and branch ductwork for most accurate
duct traverses.
7. Place outlet dampers in the full open position.
8. Prepare schematic diagrams of system “as-built” ductwork and piping layouts to facilitate
reporting.
9. Verify that all motors and bearings are lubricated.
10. Verify that Volume, fire and smoke dampers are properly installed and
functional.
11. Verify that supply, return exhaust and transfer grilles, registers, diffusers, terminal units
with controls and filters are installed properly.
12. Verify that air handling systems, units, duct systems and associated apparatus, such as
heating and cooling coils, filter sections, access doors, etc. are correctly blanked and/or
sealed to eliminate by-pass or leakage of air.
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13. Verify that fans operating at full load and verify for freedom vibration, proper fan
rotation and belt tension and those elements in motor starters to be of proper size and
rating.
14. Verify proper installation of duct mounted smoke detectors.
15. Verify that mixing boxes set to maximum, minimum and outlets balanced within 10% of
design CFM.
16. With supply system in maximum mode, proportion return inlets, traverse and adjust
dampers to design cfm. Re-measure and adjust return inlets within 10% of design cfm.
Record all final traverse and static pressure data.
17. With supply system in the maximum mode, adjust minimum outside air damper to design
through pitot tube traverse. Measure and record traverse and static pressure.
18. After completion, take total air handling unit static profile and record all final statics,
amperage rpm, cfm, etc.
G. NOT USED
H. HYDRONIC SYSTEM BALANCING
1. Open valves to full open position. Close coil bypass valves.
2. Remove and clean and replace all strainers. Verify start-up strainers have been
removed.
3. Examine hydronic systems and determine if water has been treated and
cleaned.
4. Check pump rotation.
5. Clean and set automatic fill valves for required system pressure.
6. Check expansion tanks to determine that they are not air bound and that the system is
completely full of water.
7. Check air vents at high points of systems and determine if all are installed and operating
freely (automatic type) or to bleed air completely (manual type).
8. Check calibrations of existing thermostats.
9. Set temperature controls so all coils are calling for full flow.
10. Check operation of automatic bypass valves.
11. Check and set operating temperatures of chillers to design requirements.
12. Verify that all motors and bearings are lubricated.
13. NOT USED
14. Hot Water:
a. Measure and set distribution flow stations. Record final settings
b. Test and record pressure drops and temperature drops through heat exchangers
and boilers.
c. Test and set pressure drops to submittal specifications on air handling units and
preheat coils.
15. Mixing Boxes
a. Adjust manual balancing devices to achieve design rated pressure drop at each
coil.
b. Measure entering and leaving air temperatures.
c. Compute BTU/HR at minimum CFM through box and compare to design
BTU/HR.
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I. CONTROL SYSTEMS
1. Verify that control components are installed in accordance with project requirements and
functional, including electrical interlocks, damper sequences, air and water resets, fire
and freeze stats, temperature/humidity sensors and high and low limit switches.
2. AHU Controls:
a. Check temperature controls for proper calibration and
set point. Record final temperatures.
b. Check economizer controls for proper damper and control
calibration.
c. Check and test for calibration the supply/return volumetric
synchronization system.
d. Determine static pressure controller set point.
e. Check static pressure control under maximum conditions,
or proper operation.
3. Thermostats and Controllers:
a. Check for proper control valves, mixing boxes, exhaust
fans, etc.
b. Determine calibration set point of all thermostats.
c. Set design set point.
4. DDC Control System: Verify all the schedule control points are actually included and
operating; the control contractor should submit a trend report once system is completed.
Provide written report verifying that DDC control system is fully functional.
PART 3 - EXECUTION
3.1 REPORTS
A. Four copies of the final reports shall be submitted on applicable Reporting Forms for review.
B. Each individual final Reporting Form submitted must bear the signature of the person who
recorded the data and the signature of the TAB supervisor of the performing firm. Identification
of all types of instruments used and their last dates of calibration will be submitted with the final
report.
3.2 GUARANTEE
A. The NEBB certified firm guarantees that all testing and balancing work will be performed in
accordance with NEBB standards and procedures and shall provide evidence of their certification
for the Engineer or designated Owner’s representative.
END OF SECTION 230593
INSULATION FOR MECHANICAL SYSTEMS 230700 - 1
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SECTION 23 07 00 - INSULATION FOR MECHANICAL SYSTEMS
PART I - GENERAL
1.1 GENERAL
A. Conditions of the contract and Division I apply to this Division except that any requirements for
prior approval of equipment does not apply to this Division. The work under this section consists of furnishing and installing all thermal insulation on ducts, and all other equipment in Division 23 which are indicated to receive insulation. See also Section 23 05 00 for General Requirements applying to this and all other Division 23 sections.
1.2 SUBMITTAL DATA
The following submittal data shall be provided before any installation is made: Name of the Insulation Contractor; a narrative summary of material and method of installation for each system or component to be insulated (i.e. domestic water piping, ductliner, etc.); certified letter of compliance as required hereinafter; and descriptive literature for all material including insulation, covering, jackets, adhesives, etc.
PART 2 - PRODUCTS
2.1 GENERAL INSULATION
All insulation materials shall have composite fire and smoke hazard ratings as tested by procedure ASTM-84, NFPA-255, and UL 723 not exceeding: smoke developed - 50; flame spread - 25; fuel contributed - 50. All components of the insulation (insulation, adhesives, and jackets or facings) shall have been tested as COMPOSITE product and shall bear labels showing the flame spread, smoke-developed, and fuel contributed properties do not exceed 25, 50 and 50 respectively. All insulation accessories (glass cloth, cement, adhesives, mastic, etc.) shall have the same component ratings as listed above. All products and/or their shipping cartons shall have a label affixed, indicating flame, fuel and smoke ratings do not exceed the above requirements. Paper laminate jacket, if used, shall be permanently fire and smoke resistant. Chemicals used for treating paper in jacket laminates shall not be water soluble and shall be unaffected by water and humidity. The use of canvas or other flammable materials is prohibited and any found on the job shall be removed at the Contractor's expense and at no additional cost to the Owner. The insulation and related items specified hereinafter by specific manufacturer's designation is intended to establish a standard of quality and is not intended to exclude equal products of reputable manufacturers. Acceptable manufacturers: Owens Corning, Johns Manville, Knauf, or approved equal.
2.2 DUCT SYSTEMS
A. All metal air conditioning return ducts or ducts exposed/ visible from occupied space shall be
lined with thermal and acoustic ductliner, Manville Linacoustic or approved equal, approved by
the City of El Paso, 1-1/2 pound per cubic foot density, 1 1/2" thick or equivalent unless
otherwise noted on the plans having a thermal conductance of 0.25 BTU/sq. ft./hr./degree F./inch
thickness at 75F. mean temperature and with a noise reduction coefficient (NCR) of .20,
Underwriters Laboratories Inc. fire hazard classification of flame spread 25, fuel contributed 50
and smoke developed 50 or better.
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B. Ductwrap shall be used on all refrigerated and heated ducts installed in concealed areas.
Ductwrap shall be Manville Microlite Duct Insulation, 1.0 PCF density, 2" thick with a thermal conductivity equal to .265 at 75 degrees F. Wrap shall have an FSK fiberglass reinforced foil face.
PART 3 - EXECUTION
3.1 DUCT INSULATION
A. Ducts indicated to have internal insulation shall be lined by carefully adhering the liner in a continuous piece to clean, flat metal sheets with quick-tacking rubber base adhesive. The duct shall be formed, with the liner attached, in a sheet brake. The coated side of the liner shall face the air stream, and all exposed edges shall be coated with adhesive. Ducts shall also have the liner additionally secured with mechanical fasteners. Spacing of fasteners shall be on approximately fifteen inches (15") centers, and shall be adhered with manufacturer's recommended adhesive. The insulation shall be held in place with surface anchor washers, speed clips or equal. All projecting ends of fasteners shall be cut off flush with washer.
B. Ductwrap shall be applied in strict accordance with manufacturer's instructions. Wrap shall be
continuous with overlapping sections. Fasten and seal overlap joints according to manufacturer's recommendations.
C. Insulation shall be butted tightly at joints and vapor barrier facing shall be overlapped a minimum
of two (2") inches. Insulation should be removed from lap prior to stapling. All seams shall be stapled approximately six (6") inches on center with outward clinching staples, then sealed with a foil vapor barrier tape or vapor barrier mastic.
D. Where ducts are over 14" in width, the ductwrap shall be additionally secured to the bottom of
rectangular ducts with mechanical fasteners spaced on 18" centers (maximum) to prevent sagging of insulation. Seal penetrations of facing so as to provide a vapor-tight system.
3.2 SHOP DRAWINGS
Data sheets for duct insulation systems. Adhesives, and Fitting and valve covers.
END OF SECTION 23 07 00
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SECTION 23 09 23 Instrumentation and Control for HVAC
PART 1 – GENERAL
1.1 GENERAL CONDITIONS
A. Changes in Scope of Work
Any changes in the scope of work must be authorized by a written Change Order, and issued by SISD,
in accordance with Contract conditions.
B. Correction of Work
Contractor’s Responsibility.
1. The Contractor shall promptly correct all work SISD finds defective or failing to conform to the
Contract Documents. The Contractor shall bear all cost of correcting such work.
2. During Warranty.
If, within the warranty period required by the Contract Documents, any of the work is found to
be defective or not in accordance with the Contract Documents, the Contractor shall correct it
promptly after receipt of a written notice from SISD to do so. SISD shall give notice promptly
after discovery of the condition.
C. Coordination of Work During Construction
1. The Contractor shall coordinate any necessary changes in work scheduling with SISD to
minimize disruption.
a. The Contractor shall protect the installed works by other trades.
b. The Contractor shall coordinate with other trades.
c. The Contractor shall repair any damage caused by his work to building(s) and equipment
at no additional cost to the owner.
1.2 PRODUCTS FURNISHED BUT NOT INSTALLED UNDER THIS SECTION
A. Section 23 09 13.23 - Sensors and Transmitters
1. Airflow stations
2. Flow meters
B. Section 23 09 13.33 - Control Valves
1. Control valves
C. Section 23 09 13.43 - Control Dampers
1. Automated Dampers
D. Section 23 70 00 - Central HVAC Equipment
1. AHU, heating, and ventilating unit controls
E. Section 23 80 00 - Decentralized HVAC Equipment
1. Terminal unit controls
1.3 PRODUCTS INSTALLED BUT NOT FURNISHED UNDER THIS SECTION
A. None
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1.4 PRODUCTS NOT FURNISHED OR INSTALLED UNDER BUT INTEGRATED WITH THE WORK OF
THIS SECTION
A. Section 23 36 00 - Air Terminal Units
1. VAV boxes: VAV Terminal Units shall be furnished configured to accept control inputs from
an external building automation system controller as specified in Section 23 09 93. Factory
mounted safeties and other controls shall not interfere with this controller.
B. Section 23 70 00 - Central HVAC Equipment
1. Packaged AHU or evaporative cooler controls: Unit shall be furnished configured to accept
control inputs from an external building automation system controller as specified in Section 23
09 93. Factory mounted safeties and other controls shall not interfere with this controller.
1.5 RELATED SECTIONS
A. The General Conditions of the Contract, Supplementary Conditions, and General Requirements are
part of this specification and shall be used in conjunction with this section as part of the contract
documents.
B. The following sections constitute related work:
1. Section 23 00 00 - Heating, Ventilating, and Air Conditioning
2. Section 23 05 00 - Common Work Results for Mechanical
3. Section 23 05 93 - Test and Balance
4. Section 23 07 00 - Insulation for Mechanical Systems
5. Section 23 09 93 - Sequence of Operations for HVAC Controls
6. Section 23 23 00 - Refrigerant Piping
7. Section 23 30 00 - Fabric Duct
8. Section 23 84 00 - Humidity Control Equipment
1.6 DESCRIPTION
A. General: The control system shall consist of a high-speed, peer-to-peer network of DDC controllers, a
control system server, and a web-based operator interface.
B. System software shall be based on a server/thin client architecture, designed around the open standards of
web technology. The control system server shall be accessed using a Web browser over the control system
network, the owner's local area network, and (at the owner's discretion) over the Internet.
The intent of the thin-client architecture is to provide operators complete access to the control system via a
Web browser. No special software other than a web browser shall be required to access graphics, point
displays, and trends, configure trends, configure points and controllers, or to download programming into the
controllers.
C. System shall use the BACnet protocol for communication to the operator workstation or web server and for
communication between control modules. I/O points, schedules, setpoints, trends and alarms specified in 23
09 93 – “Sequence of Operations for HVAC Controls” shall be BACnet objects.
1.7 APPROVED CONTROL SYSTEM MANUFACTURERS
A. The following are approved control system suppliers, manufacturers, and product lines:
Supplier Manufacturer Product Line
PC Automated Controls, Inc. Automated Logic Corporation WebCTRL
• The above list does not indicate order of preference. Inclusion on this list does not guarantee acceptance of
products or installation. Control systems shall comply with the terms of this specification.
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1. The Contractor shall use only operator workstation software, controller software, custom application
programming language, and controllers from the corresponding manufacturer and product line unless
Owner approves use of multiple manufacturers.
2. Other products specified herein (such as sensors, valves, dampers, and actuators) need not be
manufactured by the above manufacturers.
1.8 QUALITY ASSURANCE
A. Installer and Manufacturer Qualifications
1. Installer shall have an established working relationship with Control System Manufacturer.
2. Installer shall have successfully completed Control System Manufacturer’s control system training.
Upon request, Installer shall present record of completed training including course outlines.
1.9 CODES AND STANDARDS
A. Work, materials, and equipment shall comply with the most restrictive of local, state, and federal authorities'
codes and ordinances or these plans and specifications. As a minimum, the installation shall comply with the
current editions in effect 30 days prior to the receipt of bids of the following codes:
1. National Electric Code (NEC)
2. International Building Code (IBC)
a. Section 719 Ducts and Air Transfer Openings
b. Section 907 Fire Alarm and Detection Systems
c. Section 909 Smoke Control Systems
d. Chapter 28 Mechanical
3. International Mechanical Code (IMC)
4. ANSI/ASHRAE Standard 135, BACnet - A Data Communication Protocol for Building
Automation and Control Systems
1.10 SYSTEM PERFORMANCE
A. Performance Standards. System shall conform to the following minimum standards over network
connections. Systems shall be tested using manufacturer’s recommended hardware and software for operator
workstation (server and browser for web-based systems).
1. Graphic Display.A graphic with 20 dynamic points shall display with current data within 10 sec.
2. Graphic Refresh.A graphic with 20 dynamic points shall update with current data within 8 sec. and
shall automatically refresh every 15 sec.
3. Configuration and Tuning Screens. Screens used for configuring, calibrating, or tuning points, PID
loops, and similar control logic shall automatically refresh within 6 sec.
4. Object Command. Devices shall react to command of a binary object within 2 sec. Devices shall
begin reacting to command of an analog object within 2 sec.
5. Alarm Response Time. An object that goes into alarm shall be annunciated at the workstation within
45 sec.
6. Program Execution Frequency. Custom and standard applications shall be capable of running as often
as once every 5 sec. Select execution times consistent with the mechanical process under control.
7. Performance. Programmable controllers shall be able to completely execute DDC PID control loops
at a frequency adjustable down to once per sec. Select execution times consistent with the mechanical
process under control.
8. Multiple Alarm Annunciation. Each workstation on the network shall receive alarms within 5 sec of
other workstations.
9. Reporting Accuracy. System shall report values with minimum end-to-end accuracy listed in Table 1.
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10. Control Stability and Accuracy. Control loops shall maintain measured variable at setpoint within
tolerances listed in Table 2.
Table-1
Reporting Accuracy
Measured Variable Reported Accuracy
Space Temperature ±0.5ºC (±1ºF)
Ducted Air ±0.5ºC (±1ºF)
Outside Air ±1.0ºC (±2ºF)
Dew Point ±1.5ºC (±3ºF)
Water Temperature ±0.5ºC (±1ºF)
Delta-T ±0.15º (±0.25ºF)
Relative Humidity ±5% RH
Water Flow ±2% of full scale
Airflow (terminal) ±10% of full scale (see Note 1)
Airflow (measuring stations) ±5% of full scale
Airflow (pressurized spaces) ±3% of full scale
Air Pressure (ducts) ±25 Pa (±0.1 in. w.g.)
Air Pressure (space) ±3 Pa (±0.01 in. w.g.)
Water Pressure ±2% of full scale (see Note 2)
Electrical ±1% of reading (see Note 3)
Carbon Monoxide (CO) ±5% of reading
Carbon Dioxide (CO2) ±50 ppm
Note 1: Accuracy applies to 10%–100% of scale
Note 2: For both absolute and differential pressure
Note 3: Not including utility-supplied meters
Table 2
Control Stability and Accuracy
Controlled Variable Control Accuracy Range of Medium
Air Pressure ±50 Pa (±0.2 in. w.g.)
±3 Pa (±0.01 in. w.g.)
0–1.5 kPa (0–6 in. w.g.)
-25 to 25 Pa (-0.1 to 0.1 in. w.g.)
Airflow ±10% of full scale
Space Temperature ±1.0ºC (±2.0ºF)
Duct Temperature ±1.5ºC (±3ºF)
Humidity ±5% RH
Fluid Pressure ±10 kPa (±1.5 psi)
±250 Pa (±1.0 in. w.g.)
MPa (1–150 psi)
0–12.5 kPa (0–50 in. w.g.) differential
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1.11 SUBMITTALS
A. Product Data and Shop Drawings: Meet requirements of Section 01 30 00 on Shop Drawings, Product Data,
and Samples. In addition, the contractor shall provide shop drawings or other submittals on hardware,
software, and equipment to be installed or provided. No work may begin on any segment of this project until
submittals have been approved for conformity with design intent. Provide drawings as AutoCAD compatible
files on magnetic or optical disk (file format: .DWG, .DXF, .VSD, or comparable) and three 11” x 17” prints
of each drawing. When manufacturer’s cutsheets apply to a product series rather than a specific product, the
data specifically applicable to the project shall be highlighted or clearly indicated by other means. Each
submitted piece of literature and drawing shall clearly reference the specification and/or drawing that the
submittal is to cover. General catalogs shall not be accepted as cutsheets to fulfill submittal requirements.
Select and show submittal quantities appropriate to scope of work. Submittal approval does not relieve
Contractor of responsibility to supply sufficient quantities to complete work. Submittals shall be provided
within 12 weeks of contract award. Submittals shall include:
1. DDC System Hardware
a. A complete bill of materials to be used indicating quantity, manufacturer, model number, and
relevant technical data of equipment to be used.
b. Manufacturer’s description and technical data such as performance curves, product
specifications, and installation and maintenance instructions for items listed below and for
relevant items not listed below:
i. Direct digital controllers (controller panels)
ii. Transducers and transmitters
iii. Sensors (including accuracy data)
iv. Actuators
v. Valves
vi. Relays and switches
vii. Control panels
viii. Power supplies
ix. Batteries
x. Operator interface equipment
xi. Wiring
c. Wiring diagrams and layouts for each control panel. Show termination numbers.
d. Schematic diagrams for all field sensors and controllers. Provide floor plans of all sensor
locations and control hardware. Riser diagrams showing control network layout,
communication protocol, and wire types.
2. Central System Hardware and Software
a. A complete bill of material of equipment used indicating quantity, manufacturer, model
number, and relevant technical.
b. Manufacturer’s description and technical data such as product specifications and installation
and maintenance instructions for items listed below and for relevant items furnished under this
contract not listed below:
i. Central Processing Unit (CPU) or web server
ii. Monitors
iii. Keyboards
iv. Power supplies
v. Battery backups
vi. Interface equipment between CPU or server and control panels
vii. Operating System software
viii. Operator interface software
ix. Color graphic software
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x. Third-party software
c. Schematic diagrams for all control, communication, and power wiring. Provide a schematic
drawing of the central system installation. Label all cables and ports with computer
manufacturers’ model numbers and functions. Show interface wiring to control system.
d. Network riser diagrams of wiring between central control unit and control panels.
3. Controlled Systems
a. Riser diagrams showing control network layout, communication protocol, and wire types.
b. A schematic diagram of each controlled system. The schematics shall have all control points
labeled with point names shown or listed. The schematics shall graphically show the location
of all control elements in the system.
c. A schematic wiring diagram of each controlled system. Label control elements and terminals.
Where a control element is also shown on control system schematic, use the same name.
d. An instrumentation list (Bill of Materials) for each controlled system. List each control system
element in a table. Show element name, type of device, manufacturer, model number, and
product data sheet number.
e. A mounting, wiring, and routing plan-view drawing. The design shall take into account
HVAC, electrical, and other systems’ design and elevation requirements. The drawing shall
show the specific location of all concrete pads and bases and any special wall bracing for
panels to accommodate this work.
f. A complete description of the operation of the control system, including sequences of
operation. The description shall include and reference a schematic diagram of the controlled
system.
g. A point list for each control system. List I/O points and software points specified in Section 23
09 93. Indicate alarmed and trended points.
4. Quantities of items submitted shall be reviewed but are the responsibility of the Contractor.
5. A description of the proposed process along with all report formats and checklists to be used in
Section 23 09 23 Article3.17(Control System Demonstration and Acceptance).
6. BACnet Protocol Implementation Conformance Statement (PICS) for each submitted type of
controller and operator interface.
B. Schedules
1. Within one month of contract award, provide a schedule of the work indicating the following:
a. Intended sequence of work items
b. Start date of each work item
c. Duration of each work item
d. Planned delivery dates for ordered material and equipment and expected lead times
e. Milestones indicating possible restraints on work by other trades or situations
2. Monthly written status reports indicating work completed and revisions to expected delivery dates.
Include updated schedule of work.
C. Project Record Documents. Upon completion of installation, submit three copies of record (as-built)
documents. The documents shall be submitted for approval prior to final completion and shall include:
1. Project Record Drawings. As-built versions of submittal shop drawings provided as AutoCAD
compatible files on magnetic or optical media (file format: .DWG, .DXF, .VSD, or comparable) and
as 11" x 17" prints.
2. Testing and Commissioning Reports and Checklists. Completed versions of reports, checklists, and
trend logs used to meet requirements of Section 23 09 23 Article3.17(Control System Demonstration
and Acceptance).
3. Operation and Maintenance (O&M) Manual.
4. As-built versions of submittal product data.
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5. Names, addresses, and telephone numbers of installing contractors and service representatives for
equipment and control systems.
6. Operator’s manual with procedures for operating control systems: logging on and off, handling
alarms, producing point reports, trending data, overriding computer control, and changing setpoints
and variables.
7. Programming manual or set of manuals with description of programming language and syntax, of
statements for algorithms and calculations used, of point database creation and modification, of
program creation and modification, and of editor use.
8. Engineering, installation, and maintenance manual or set of manuals that explains how to design and
install new points, panels, and other hardware; how to perform preventive maintenance and
calibration; how to debug hardware problems; and how to repair or replace hardware.
9. Documentation of programs created using custom programming language including setpoints, tuning
parameters, and object database. Electronic copies of programs shall meet this requirement if control
logic, setpoints, tuning parameters, and objects can be viewed using furnished programming tools.
10. Graphic files, programs, and database on magnetic or optical media.
11. List of recommended spare parts with part numbers and suppliers.
12. Complete original-issue documentation, installation, and maintenance information for furnished third-
party hardware including computer equipment and sensors.
13. Complete original-issue copies of furnished software, including operating systems, custom
programming language, operator workstation or web server software, and graphics software.
14. Licenses, guarantees, and warranty documents for equipment and systems.
15. Recommended preventive maintenance procedures for system components, including schedule of
tasks such as inspection, cleaning, and calibration; time between tasks; and task descriptions.
D. Training Materials: Provide course outline and materials for each class at least six weeks before first class.
Training shall be furnished via instructor-led sessions, computer-based training, or web-based training.
Engineer will modify course outlines and materials if necessary to meet Owner’s needs. Engineer will
review and approve course outlines and materials at least three weeks before first class.
1.12 WARRANTY
A. Warrant work as follows:
1. Warrant labor and materials for specified control system free from defects for a period of 24 months
after final acceptance by SISD. Control system failures during warranty period shall be adjusted,
repaired, or replaced at no additional cost or reduction in service to Owner. Respond during normal
business hours within 24 hours of Owner’s warranty service request. The additional warranties shall
apply:
a. Three year extended warranty on all routers, gateways, building controllers and all digital
control modules. Extended warranty shall mean that following the two year warranty
described above, the routers, gateways, building controllers, and all digital control modules
shall be warranted for an additional three years. This is a material warranty only.
Replacement, repair or troubleshooting labor is not included.
b. Three year extended warranty on all control valves. Extended warranty shall mean that
following the two year warranty described above, the control valves with actuators shall be
warranted for an additional three years. This is a material warranty only. Replacement,
repair or troubleshooting labor is not included.
c. Phone technical support shall be provided free of charge for two years after the project
completion date.
d. The Contractor shall receive calls during the warranty period for all problems or
questions experienced in the operation of the installed equipment and shall take steps to
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correct any deficiencies that may exist. The response time to any problems shall be on
one (1) hour by modem and/or six (6) hours on-site maximum, at all times.
e. After the two year warranty period has expired, District employees may replace valves
and control components as they deem necessary, even if using a different brand or type
without affecting the warranty on the rest of the system.
2. Work shall have a single warranty date, even if Owner receives beneficial use due to early
system start-up. If specified work is split into multiple contracts or a multi-phase contract, each
contract or phase shall have a separate warranty start date and period.
3. If the engineer determines that equipment and systems operate satisfactorily at the end of final
start-up, testing, and commissioning phase, the engineer will certify in writing that control
system operation has been tested and accepted in accordance with the terms of this
specification. Date of acceptance shall begin warranty period.
4. Provide updates to operator workstation or web server software, project-specific software,
graphic software, database software, and firmware that resolve the contractor-identified
software deficiencies at no charge during warranty period. If available, Owner can purchase in-
warranty service agreement to receive upgrades for functional enhancements associated with
above-mentioned items. Do not install updates or upgrades without Owner’s written
authorization.
5. Exception: Contractor shall not be required to warrant reused devices except those that have
been rebuilt or repaired. Installation labor and materials shall be warranted. Demonstrate
operable condition of reused devices at time of Engineer’s acceptance.
1.13 OWNERSHIP OF PROPRIETARY MATERIAL
A. Project-specific software and documentation shall become Owner's property. This includes, but is not
limited to:
1. Graphics
2. Record drawings
3. Database
4. Application programming code
5. Documentation
1.14 DEFINITIONS
Term Definition
BACnet Interoperability
Building Blocks (BIBB)
A BIBB defines a small portion of BACnet functionality that is
needed to perform a particular task. BIBBS are combined to build
the BACnet functional requirements for a device in a specification.
BACnet/BACnet Standard BACnet communication requirements as defined by the latest
version of ASHRAE/ANSI 135 and approved addenda.
Control Systems Server A computer(s) that maintain(s) the systems configuration and
programming database.
Controller Intelligent stand-alone control device. Controller is a generic
reference to building controllers, custom application controllers, and
application specific controllers.
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Term Definition
Direct Digital Control Microprocessor-based control including Analog/Digital conversion
and program logic.
Gateway Bi-directional protocol translator connecting control systems that use
different communication protocols.
Local Area Network Computer or control system communications network limited to
local building or campus.
Master-Slave/Token Passing Data link protocol as defined by the BACnet standard.
Point-to-Point Serial communication as defined in the BACnet standard.
Primary Controlling LAN High speed, peer-to-peer controller LAN connecting BCs and
optionally AACs and ASCs. Refer to System Architecture below.
Protocol Implementation
Conformance Statement
A written document that identifies the particular options specified by
BACnet that are implemented in a device.
Router A device that connects two or more networks at the network layer.
Wiring Raceway, fittings, wire, boxes and related items.
PART 2 – Products
2.1 MATERIALS
A. Use new products the manufacturer is currently manufacturing and selling for use in new installations. Do
not use this installation as a product test site unless explicitly approved in writing by Owner. Spare parts
shall be available for at least five years after completion of this contract.
2.2 COMMUNICATION
A. Control products, communication media, connectors, repeaters, hubs, and routers shall comprise a BACnet
internetwork. Controller and operator interface communication shall conform to ANSI/ASHRAE Standard
135, BACnet.
B. Install new wiring and network devices as required to provide a complete and workable control network.
C. Use existing Ethernet backbone for network segments marked "existing" on project drawings.
D. Each controller shall have a communication port for temporary connection to a laptop computer or other
operator interface. Connection shall support memory downloads and other commissioning and
troubleshooting operations.
E. Internetwork operator interface and value passing shall be transparent to internetwork architecture.
1. An operator interface connected to a controller shall allow the operator to interface with each
internetwork controller as if directly connected. Controller information such as data, status, and
control algorithms shall be viewable and editable from each internetwork controller.
2. Inputs, outputs, and control variables used to integrate control strategies across multiple
controllers shall be readable by each controller on the internetwork. Program and test all cross-
controller links required to execute control strategies specified in Section 23 09 93. An authorized
operator shall be able to edit cross-controller links by typing a standard object address or by using
a point-and-click interface.
F. Workstations, Building Control Panels, and Controllers with real-time clocks shall use the BACnet Time
Synchronization service. System shall automatically synchronize system clocks daily from an operator-
designated device via the internetwork. The system shall automatically adjust for daylight saving and
standard time as applicable.
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G. System shall be expandable to at least twice the required input and output objects with additional
controllers, associated devices, and wiring.
H. System shall support Web services data exchange with any other system that complies with XML
(extensible markup language) and SOAP (simple object access protocol) standards. Web services support
shall as a minimum be provided at the workstation or web server level and shall enable data to be read
from or written to the system.
1. System shall support Web services read data requests by retrieving requested trend data or point
values (I/O hardware points, analog value software points, or binary value software points) from
any system controller or from the trend history database.
2. System shall support Web services write data request to each analog and binary object that can be
edited through the system operator interface by downloading a numeric value to the specified
object.
3. For read or write requests, the system shall require user name and password authentication and
shall support SSL (Secure Socket Layer) or equivalent data encryption.
4. System shall support discovery through a Web services connection or shall provide a tool
available through the Operator Interface that will reveal the path/identifier needed to allow a third
party Web services device to read data from or write data to any object in the system which
supports this service.
2.3 OPERATOR INTERFACE
A. Operator Interface. Web server shall reside on high-speed network with building controllers. Each standard
browser connected to server shall be able to access all system information. The Operator Workstation or
server shall conform to the BACnet Operator Workstation (B-OWS) or BACnet Advanced Workstation
(B-AWS) device profile as specified in ASHRAE/ANSI 135 BACnet Annex L.
B. Communication. Web server or workstation and controllers shall communicate using BACnet protocol.
Web server or workstation and control network backbone shall communicate using ISO 8802-3 (Ethernet)
Data Link/Physical layer protocol and BACnet/IP addressing as specified in ANSI/ASHRAE 135, BACnet
Annex J.
C. Hardware.
1. Workstation or web server. Industry-standard hardware shall meet or exceed DDC system
manufacturer’s recommended specifications and shall meet response times specified elsewhere in
this document. The following hardware requirements also apply:
a. The hard disk shall have sufficient memory to store:
i. All required operator workstation software.
ii. A DDC database at least twice the size of the delivered system database.
iii. One year of trend data based on the points specified to be trended at their
specified trend intervals.
b. Provide additional hardware (communication ports, video drivers, network interface
cards, cabling, etc.) to facilitate all control functions and software requirements specified
for the DDC system.
c. Minimum hardware configuration shall include the following:
i. Quad Core Processor
ii. 8 GB RAM
iii. 1 TB hard disk providing data at 3.0 Gb/sec
iv. 16x DVD+/-RW drive
v. Serial, parallel, and network communication ports and cables as required for
proper DDC system operation
D. System Software.
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1. Operating System. Web server or workstation shall have an industry-standard professional-grade
operating system. Operating system shall meet or exceed the DDC System manufacturers
minimum requirements for their software. Acceptable systems include Microsoft Windows 7 or 8,
Microsoft Vista, Windows Server 2008 or 2012, Red Hat Enterprise Linux, or Ubuntu Desktop
12.04.
2. System Graphics. The operator interface software shall be graphically based and shall include at
least one graphic per piece of equipment or occupied zone, graphics for each chilled water and hot
water system, and graphics that summarize conditions on each floor of each building included in
this contract. Indicate thermal comfort on floor plan summary graphics using dynamic colors to
represent zone temperature relative to zone setpoint.
a. Functionality. Graphics shall allow operator to monitor system status, to view a summary
of the most important data for each controlled zone or piece of equipment, to use point-
and-click navigation between zones or equipment, and to edit setpoints and other
specified parameters.
b. Animation. Graphics shall be able to animate by displaying different image files for
changed object status.
c. Alarm Indication. Indicate areas or equipment in an alarm condition using color or other
visual indicator.
d. Format. Graphics shall be saved in an industry-standard format such as BMP, JPEG,
PNG, or GIF. Web-based system graphics shall be viewable on browsers compatible with
World Wide Web Consortium browser standards. Web graphic format shall require no
plug-in or shall only require widely available no-cost plug-ins (such as Adobe Flash).
3. Custom Graphics. Custom graphic files shall be created with the use of a graphics generation
package furnished with the system. The graphics generation package shall be a graphically based
system that uses the mouse to create and modify graphics that are saved in the same formats as are
used for system graphics.
4. Graphics Library. Furnish a complete library of standard HVAC equipment graphics such as
chillers, boilers, air handlers, terminals, fan coils, and unit ventilators. This library also shall
include standard symbols for other equipment including fans, pumps, coils, valves, piping,
dampers, and ductwork. The library shall be furnished in a file format compatible with the
graphics generation package program.
E. System Applications. System shall provide the following functionality to authorized operators as an
integral part of the operator interface or as stand-alone software programs. If furnished as part of the
interface, the tool shall be available from each workstation or web browser interface. If furnished as a
stand-alone program, software shall be installable on standard IBM-compatible PCs with no limit on the
number of copies that can be installed under the system license.
1. Automatic System Database Configuration. Each workstation or web server shall store on its hard
disk a copy of the current system database, including controller firmware and software. Stored
database shall be automatically updated with each system configuration or controller firmware or
software change.
2. Manual Controller Memory Download. Operators shall be able to download memory from the
system database to each controller.
3. System Configuration. The workstation software shall provide a method of configuring the
system. This shall allow for future system changes or additions by users under proper password
protection. Operators shall be able to configure the system.
4. On-Line Help. Provide a context-sensitive, on-line help system to assist the operator in operating
and editing the system. On-line help shall be available for all applications and shall provide the
relevant data for that particular screen. Additional help information shall be available through the
use of hypertext.
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5. Security. Each operator shall be required to log on to the system with user name and password in
order to view, edit, add, or delete data.
a. Operator Access. The user name and password combination shall define accessible
viewing, editing, adding, and deleting privileges for that operator. Users with system
administrator rights shall be able to create new users and edit the privileges of all existing
users. System Administrators shall also be able to vary and deny each operator's
privileges based on the geographic location of the equipment, such as the ability to edit
operating parameters in Building A, to view but not edit parameters in Building B, and to
not even see equipment in Building C.
b. Automatic Log Out. Automatically log out each operator if no keyboard or mouse
activity is detected. This auto logoff time shall be user adjustable.
c. Encrypted Security Data. Store system security data including operator passwords in an
encrypted format. System shall not display operator passwords.
6. System Diagnostics. The system shall automatically monitor the operation of all building
management panels and controllers. The failure of any device shall be annunciated to the operator.
7. Alarm Processing. System input and status objects shall be configurable to alarm on departing
from and on returning to normal state. Operator shall be able to enable or disable each alarm and
to configure alarm limits, alarm limit differentials, alarm states, and alarm reactions for each
system object. Configure and enable alarm points as specified in Section 23 09 93 (Sequences of
Operation). Alarms shall be BACnet alarm objects and shall use BACnet alarm services.
8. Alarm Messages. Alarm messages shall use the English language descriptor for the object in
alarm in such a way that the operator will be able to recognize the source, location, and nature of
the alarm without relying on acronyms or mnemonics.
9. Alarm Reactions. Operator shall be able to configure (by object) what, if any actions are to be
taken during an alarm. As a minimum, the workstation or web server shall be able to log, print,
A written document, created by the manufacturer of a device, which identifies the
particular options specified by BACnet that are implemented in the device.
• Smart Actuator (SA):
An actuator which is controlled by a network connection rather than a binary or analog
signal. (0-10v, 4-20mA, relay, etc.)
• Smart Sensor (SS):
A sensor which provides information to the BAS via network connection rather than a
binary or analog signal. (0-10000 ohm, 4-20mA, dry contact, etc.)
• Web services:
Web services are a standard method of exchanging data between computer systems using
the XML (extensible markup language) and SOAP (simple object access protocol)
standards. Web services can be used at any level within a Building Automation System
(BAS), but most commonly they are used to transfer data between BAS using different
protocols or between a BAS and a non-BAS system such as a tenant billing system or a
utility management system.
Terms used within the Sequences of Operation:
• adj.
Adjustable by the end user, through the supplied user interface.
• AI, AO, etc. (Column Headings on Points List)
AI = Analog Input. A physical input to the control module.
AO = Analog Output. A physical output from the control module.
AV = Analog Value. An intermediate (software) point that may be editable or read-only.
Editable AVs are typically used to allow the user to set a fixed control parameter, such as
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a setpoint. Read Only AVs are typically used to display the status of a control operation.
BI = Binary Input. A physical input to the control module.
BO = Binary Output. A physical output from the control module.
BV = Binary Value. An intermediate (software) point that may be editable or read-only.
Editable BVs are typically used to allow the user to set a fixed control parameter, such as
a setpoint. Read Only BVs are typically used to display the status of a control operation.
Loop = A control loop. Most commonly a PID control loop. Typically a control loop will
include a setpoint, an input which is compared to the setpoint, and an output which
controls some action based upon the difference between the input and the setpoint. A PID
control loop will also include gains for the proportional, integral, and derivative response
as well as an interval which controls how frequently the control loop updates its output.
These gains may be adjustable by the end user for control loop "tuning," but in self-
tuning control loops or loops which have been optimized for a specific application the
gains may not be adjustable.
Sched = Schedule. The control algorithm for this equipment shall include a user editable
schedule.
Trend. The control system shall be configured to collect and display a trend log of this
object. The trending interval shall be no less than one sample every 5 minutes. (Change
of Value trending, where a sample is taken every time the value changes by more than a
user-defined minimum, is an acceptable alternative.)
Alarm. The control system shall be configured to generate an alarm when this object
exceeds user definable limits, as described in the Sequence of Controls.
Note: If the specifications require use of the BACnet protocol, all of the above shall be
provided as BACnet objects.
• KW Demand Limiting: *
An energy management strategy that reduces energy consumption when a system's
electric power meter exceeds an operator-defined threshold.
When power consumption exceeds defined levels, the system automatically adjust
setpoints, de-energizes low priority equipment, and takes other pre-programmed actions
to avoid peak demand charges. As the demand drops, the system restores loads in a
predetermined manner.
• Occupant Override Switch, or Timed Local Override:
A control option that allows building occupants to override the programmed HVAC
schedule for a limited period of time.
When the override time expires, the zone returns to its unoccupied state.
• Occupant Setpoint Adjustment:
A control option that allows building occupants to adjust - within limits set by the HVAC
control system - the heating and cooling setpoints of selected zones. Typically the user
interface for this function is built into the zone sensor.
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• Optimal Start-Up: *
A control strategy that automatically starts an HVAC system at the latest possible time
yet ensures comfort conditions by the time the building becomes occupied.
In a typical implementation, a controller measures the temperature of the zone and the
outside air. Then, using design heating or cooling capacity at the design outside air
temperature, the system computes how long a unit must run at maximum capacity to
bring the zone temperature to its occupied setpoint.
The optimal start algorithm often includes a self-learning feature to adjust for variations
from design capacity.
A distributed system must use Run on Request with Optimal Start. (See below.)
• Requested, or Run on Request: *
A control strategy that optimizes the runtime of a source piece of equipment that supplies
one or more receiving units - such as an air handler unit supplying zone terminal units
with heating, cooling, ventilation, or similar service. Source equipment runs only when
needed, not on a fixed schedule.
The source equipment runs when one or more receiving units request its services. An
operator determines how many requests are required to start the source equipment.
For example, if all the zones in a building are unoccupied and the zone terminal units do
not need heating or cooling, the AHU will shut down. However, if a zone becomes
occupied or needs cooling, the terminal unit will send a run request to the AHU to initiate
the start-up sequence. If this AHU depends on a central chiller, it can send a run request
to the chiller.
The run on request algorithm also allows an operator to schedule occupancy for
individual zones based on the needs of the occupants without having to adjust the
schedules of related AHUs and chillers.
• Trim and Respond, or Setpoint Optimization: *
A control strategy that optimizes the setpoint of a source piece of equipment that supplies
one or more receiving units - such as an air handler unit supplying zone terminal units
with heating, cooling, ventilation, or similar service.
The source unit communicates with receiving units to determine heating, cooling, and
other requirements, and then adjusts its setpoint.
For example, if all zones are comfortable and do not request cooling, the AHU will
gradually increase (trim) its supply air setpoint. When a zone requests cooling, the AHU
responds by dropping its setpoint. The more zones that request cooling, the more it drops
the setpoint. The AHU repeats this process throughout the day to keep zones cool, but
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with a supply air setpoint that is no cooler than necessary.
Contracting Terms:
• Furnished or Provided:
The act of supplying a device or piece of equipment as required meeting the scope of
work specified and making that device or equipment operational. All costs required to
furnish the specified device or equipment and make it operational are borne by the
division specified to be responsible for providing the device or equipment.
• Install or Installed:
The physical act of mounting, piping or wiring a device or piece of equipment in
accordance with the manufacturer's instructions and the scope of work as specified. All
costs required to complete the installation are borne by the division specified to include
labor and any ancillary materials.
• Interface:
The physical device required to provide integration capabilities from an equipment
vendor's product to the control system. The equipment vendor most normally furnishes
the interface device. An example of an interface is the chilled water temperature reset
interface card provided by the chiller manufacturer in order to allow the control system to
integrate the chilled water temperature reset function into the control system.
• Integrate:
The physical connections from a control system to all specified equipment through an
interface as required to allow the specified control and monitoring functions of the
equipment to be performed via the control system.
APPENDIX B: Abbreviations
The following abbreviations may be used in graphics, schematics, point names, and other UI
applications where space is at a premium.
AC - Air Conditioning
ACU - Air Conditioning Unit
AHU - Air Handling Unit
AI - Analog Input
AO - Analog Output
AUTO - Automatic
AUX - Auxiliary
BI - Binary Input
BO - Binary Output
C - Common
CHW - Chilled Water
CHWP - Chilled Water Pump
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CHWR - Chilled Water Return
CHWS - Chilled Water Supply
COND - Condenser
CW - Condenser Water
CWP - Condenser Water Pump
CWR - Condenser Water Return
CWS - Condenser Water Supply
DA - Discharge Air
EA - Exhaust Air
EF - Exhaust Fan
EVAP - Evaporators
FCU - Fan Coil Unit
HOA - Hand / Off / Auto
HP - Heat Pump
HRU - Heat Recovery Unit
HTEX - Heat Exchanger
HW - Hot Water
HWP - Hot Water Pump
HWR - Hot Water Return
HWS - Hot Water Supply
MAX - Maximum
MIN - Minimum
MISC - Miscellaneous
NC - Normally Closed
NO - Normally Open
OA - Outdoor Air
PIU - Powered Induction Unit
RA - Return Air
RF - Return Fan
RH - Relative Humidity
RTU - Roof-top Unit
SA - Supply Air
SF - Supply Fan
SP - Static Pressure
TEMP - Temperature
UH - Unit Heater
UV - Unit Ventilator
VAV - Variable Air Volume
VVTU - Variable Volume Terminal Unit
W/ - with
W/O - without
WSHP - Water Source Heat Pump
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SEQUENCE OF OPERATIONS FOR HVAC CONTROLS
Dehumidifying Air Conditioning Unit -see other sections for sequences. Packaged Gas Fired Rooftop Units (typ.) Run Conditions - Scheduled: The unit shall run according to a user definable time schedule in the following modes:
• Occupied Mode: The unit shall maintain
• A 75°F (adj.) cooling setpoint
• A 70°F (adj.) heating setpoint.
• Unoccupied Mode (night setback): The unit shall maintain
• A 85°F (adj.) cooling setpoint.
• A 55°F (adj.) heating setpoint.
Alarms shall be provided as follows: • High Zone Temp: If the zone temperature is greater than the cooling setpoint by a
user definable amount (adj.).
• Low Zone Temp: If the zone temperature is less than the heating setpoint by a user definable amount (adj.).
Demand Limiting - Zone Setpoint Optimization: To lower power consumption, the zone setpoints shall automatically relax when the facility power consumption exceeds definable thresholds. The amount of relaxation shall be individually configurable for each zone. The zone setpoints shall automatically return to their previous settings when the facility power consumption drops below the thresholds. Zone Setpoint Adjust: The occupant shall be able to adjust the zone temperature heating and cooling setpoints at the zone sensor. Zone Optimal Start: The unit shall use an optimal start algorithm for morning start-up. This algorithm shall minimize the unoccupied warm-up or cool-down period while still achieving comfort conditions by the start of scheduled occupied period. Zone Unoccupied Override: A timed local override control shall allow an occupant to override the schedule and place the unit into an occupied mode for an adjustable period of time. At the expiration of this time, control of the unit shall automatically return to the schedule. Supply Air Smoke Detection: The unit shall shut down and generate an alarm upon receiving a supply air smoke detector status. Supply Fan: The supply fan shall run anytime the unit is commanded to run, unless shutdown on safeties. To prevent short cycling, the supply fan shall have a user definable (adj.) minimum runtime. Alarms shall be provided as follows:
• Supply Fan Failure: Commanded on, but the status is off.
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• Supply Fan in Hand: Commanded off, but the status is on.
• Supply Fan Runtime Exceeded: Status runtime exceeds a user definable limit (adj.).
Cooling Stages: The controller shall measure the zone temperature and stage the cooling to maintain its cooling setpoint. To prevent short cycling, there shall be a user definable (adj.) delay between stages, and each stage shall have a user definable (adj.) minimum runtime.
The cooling shall be enabled whenever:
• Outside air temperature is greater than 60°F (adj.).
• AND the economizer (if present) is disabled or fully open.
• AND the zone temperature is above cooling setpoint.
• AND the supply fan status is on.
• AND the heating is not active.
Gas Heating Stages: The controller shall measure the zone temperature and stage the heating to maintain its heating setpoint. To prevent short cycling, there shall be a user definable (adj.) delay between stages, and each stage shall have a user definable (adj.) minimum runtime. The heating shall be enabled whenever:
• Outside air temperature is less than 65°F (adj.).
• AND the zone temperature is below heating setpoint.
• AND the supply fan status is on.
• AND the cooling is not active.
Economizer: The controller shall measure the zone temperature and modulate the economizer dampers in sequence to maintain a setpoint 2°F less than the zone cooling setpoint. The outside air dampers shall maintain a minimum adjustable position of 20% (adj.) open whenever occupied. The economizer shall be enabled whenever:
• Outside air temperature is less than 65°F (adj.).
• AND the outside air temperature is less than the return air temperature.
• AND the supply fan status is on.
The economizer shall close whenever:
• Mixed air temperature drops from 45°F to 40°F (adj.).
• OR on loss of supply fan status.
• OR the freezestat (if present) is on.
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The outside and exhaust air dampers shall close and the return air damper shall open when the unit is off. If Optimal Start Up is available, the mixed air damper shall operate as described in the occupied mode except that the outside air damper shall modulate to fully closed. Minimum Outside Air Ventilation - Fixed Percentage: The outside air dampers shall maintain a minimum position (adj.) during building occupied hours and be closed during unoccupied hours. Mixed Air Temperature: The controller shall monitor the mixed air temperature and use as required for economizer control (if present) or preheating control (if present). Alarms shall be provided as follows:
• High Mixed Air Temp: If the mixed air temperature is greater than 90°F (adj.).
• Low Mixed Air Temp: If the mixed air temperature is less than 45°F (adj.).
Return Air Temperature: The controller shall monitor the return air temperature and use as required for economizer control (if present). Alarms shall be provided as follows:
• High Return Air Temp: If the return air temperature is greater than 90°F (adj.).
• Low Return Air Temp: If the return air temperature is less than 45°F (adj.).
Supply Air Temperature: The controller shall monitor the supply air temperature.
Alarms shall be provided as follows:
• High Supply Air Temp: If the supply air temperature is greater than 120°F (adj.). • Low Supply Air Temp: If the supply air temperature is less than 45°F (adj.).
Environmental Index: When the zone is occupied, the controller will monitor the deviation of the zone temperature from the heating or cooling setpoint and calculate a 0 - 100% Environmental Index which gives an indication of how well the zone is maintaining comfort. The controller will also calculate the percentage of time since occupancy began that the Environmental Index is 70% or higher. Optionally, a weighting factor can be configured to adjust the contribution of the zone to the rollup average index based upon the floor area of the zone, importance of the zone, or other static criteria.
Hardware Points Software Points
Point Name AI AO BI BO AV BV Loop Sched Trend Alarm Show On Graphic
Mixed Air Temp x x x
Supply Air Temp x x x
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Hardware Points Software Points
Point Name AI AO BI BO AV BV Loop Sched Trend Alarm Show On Graphic
Return Air Temp x x x
Zone Setpoint Adjust x x
Zone Temp x x x
Mixed Air Dampers x x x
Supply Air Smoke Detector x x x x
Supply Fan Status x x x
Zone Override x x x
Cooling Stage 1 x x x
Cooling Stage 2 x x x
Heating Stage 1 x x x
Heating Stage 2 x x x
Supply Fan Start/Stop x x x
Cooling Setpoint x x x
Economizer Zone Temp Setpoint x x x
Environmental Index x x
Heating Setpoint x x x
Percent of Time Satisfied x x
Schedule x
Compressor Runtime Exceeded x
High Mixed Air Temp x
High Return Air Temp x
High Zone Temp x
Low Mixed Air Temp x
Low Return Air Temp x
Low Zone Temp x
Supply Fan Failure x
Supply Fan in Hand x
Supply Fan Runtime Exceeded x
Totals 4 1 3 5 5 0 0 1 17 11 16
Total Hardware (13) Total Software (34)
Exhaust Fan - On/Off (typ.)
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Run Conditions - Scheduled: The fan shall run according to a user definable schedule. Fan: The fan shall have a user definable (adj.) minimum runtime. Fan Status: The controller shall monitor the fan status.
Alarms shall be provided as follows: • Fan Failure: Commanded on, but the status is off.
• Fan in Hand: Commanded off, but the status is on.
• Fan Runtime Exceeded: Fan status runtime exceeds a user definable limit (adj.).
Hardware Points Software Points
Point Name AI AO BI BO AV BV Loop Sched Trend Alarm Show On Graphic
Fan Status x x x
Fan Start/Stop x x x
Schedule x
Fan Failure x
Fan in Hand x
Fan Runtime Exceeded x
Totals 0 0 1 1 0 0 0 1 2 3 2
Total Hardware (2) Total Software (6)
VRF System (typical of 1) VRF Manufacturer shall provide an external gateway as required for the entire VRF system to be controlled and monitored by BACnet protocol. The Preferred Controls Manufacturer for the Owner is Automated Logic Corporation; gateway provide by VRF Manufacturer shall be fully compatible with ALC BACnet protocol.
The space temperature shall be monitored by the EMCS and an alarm event shall be initiated when the space temperature exceeds 80 degrees (adjustable).
Hardware Points Software Points
Point Name AI AO BI BO AV BV Loop Sched Trend Alarm Show On Graphic
Fan Speed x x x
Operation Mode x x x
Room Temperature x x x
Error Status x x x
Error Code x x x
SEQUENCE OF OPERATIONS FOR HVAC CONTROLS 23 09 93 - 6
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Hardware Points Software Points
Point Name AI AO BI BO AV BV Loop Sched Trend Alarm Show On Graphic
Enable/Disable x x x
Totals 0 0 0 0 3 1 1 1 6 0 6
Total Hardware (0) Total Software (12)
Indoor Air Handling Unit (typ.)
The AHU shall be controlled by factory furnished controls.
The space temperature shall be monitored by the EMCS and an alarm event shall be initiated when the space temperature exceeds 80 degrees (adjustable).
Hardware Points Software Points
Point Name AI AO BI BO AV BV Loop Sched Trend Alarm Show On Graphic
Room Temperature x x x x x
Totals 1 0 0 0 1 0 0 0 1 1 1
Total Hardware (1) Total Software (3)
Variable Air Volume - AHU (typ.) Run Conditions - Requested: The unit shall run whenever:
• Any zone is occupied.
• OR a definable number of unoccupied zones need heating or cooling.
Freeze Protection: The unit shall shut down and generate an alarm upon receiving a freezestat status. High Static Shutdown: The unit shall shut down and generate an alarm upon receiving an high static shutdown signal. Return Air Smoke Detection: The unit shall shut down and generate an alarm upon receiving a return air smoke detector status. Supply Air Smoke Detection: The unit shall shut down and generate an alarm upon receiving a supply air smoke detector status. Supply Fan: The supply fan shall run anytime the unit is commanded to run, unless shutdown on safeties. To prevent short cycling, the supply fan shall have a user definable (adj.) minimum runtime. Alarms shall be provided as follows:
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• Supply Fan Failure: Commanded on, but the status is off.
• Supply Fan in Hand: Commanded off, but the status is on.
• Supply Fan Runtime Exceeded: Status runtime exceeds a user definable limit (adj.).
Supply Air Duct Static Pressure Control: The controller shall measure duct static pressure and modulate the supply fan VFD speed to maintain a duct static pressure setpoint. The speed shall not drop below 30% (adj.). The static pressure setpoint shall be reset based upon the position of the zone dampers, with a goal of reducing the static pressure until at least one zone damper is nearly wide open.
• The initial duct static pressure setpoint shall be 1.5in H2O (adj.).
• If no zone damper is nearly wide open, the setpoint shall incrementally reset down to a minimum of 1.3in H2O (adj.) .
• As one or more dampers nears the wide open position, the setpoint shall incrementally reset up to a maximum of 1.8in H2O (adj.).
Alarms shall be provided as follows:
• High Supply Air Static Pressure: If the supply air static pressure is 25% (adj.) greater than setpoint.
• Low Supply Air Static Pressure: If the supply air static pressure is 25% (adj.) less than setpoint.
• Supply Fan VFD Fault.
Return Fan: The return fan shall run whenever the supply fan runs. Alarms shall be provided as follows:
• Return Fan Failure: Commanded on, but the status is off.
• Return Fan in Hand: Commanded off, but the status is on.
• Return Fan Runtime Exceeded: Status runtime exceeds a user definable limit (adj.).
• Return Fan VFD Fault.
Building Static Pressure Control: The controller shall measure building static pressure and modulate the return fan VFD speed to maintain a building static pressure setpoint of 0.05in H2O (adj.). The return fan VFD speed shall not drop below 20% (adj.). Alarms shall be provided as follows:
• High Building Static Pressure: If the building air static pressure is 25% (adj.) greater than setpoint.
• Low Building Static Pressure: If the building air static pressure is 25% (adj.) less than setpoint.
SEQUENCE OF OPERATIONS FOR HVAC CONTROLS 23 09 93 - 8
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Gas Preheating Stage: The controller shall measure the mixed air temperature and stage the preheating to maintain its setpoint 5°F (adj.) less than the supply air temperature setpoint. To prevent short cycling, the stage shall have a user definable (adj.) minimum runtime. The preheating shall be enabled whenever:
• Outside air temperature is less than 60°F (adj.).
• AND the economizer (if present) is disabled.
• AND the supply fan status is on.
The preheating stage shall run for freeze protection whenever:
• Mixed air temperature drops from 40°F to 35°F (adj.).
• AND the supply fan status is on.
Supply Air Temperature Setpoint - Optimized: The controller shall monitor the supply air temperature and shall maintain a supply air temperature setpoint reset based on zone cooling and heating requirements The supply air temperature setpoint shall be reset for cooling based on zone cooling requirements as follows:
• The initial supply air temperature setpoint shall be 55°F (adj.).
• As cooling demand increases, the setpoint shall incrementally reset down to a minimum of 53°F (adj.).
• As cooling demand decreases, the setpoint shall incrementally reset up to a maximum of 72°F (adj.) .
If more zones need heating than cooling, then the supply air temperature setpoint shall be reset for heating as follows:
• The initial supply air temperature setpoint shall be 82°F (adj.).
• As heating demand increases, the setpoint shall incrementally reset up to a maximum of 85°F (adj.).
• As heating demand decreases, the setpoint shall incrementally reset down to a minimum of 72°F (adj.).
Cooling Coil Valve: The controller shall measure the supply air temperature and modulate the cooling coil valve to maintain its cooling setpoint. The cooling shall be enabled whenever:
• Outside air temperature is greater than 60°F (adj.).
• AND the economizer (if present) is disabled or fully open.
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• AND the supply fan status is on.
• AND the heating (if present) is not active.
The cooling coil valve shall open to 50% (adj.) whenever the freezestat (if present) is on. Alarms shall be provided as follows:
• High Supply Air Temp: If the supply air temperature is 5°F (adj.) greater than setpoint.
Heating Coil Valve: The controller shall measure the supply air temperature and modulate the heating coil valve to maintain its heating setpoint. The heating shall be enabled whenever:
• Outside air temperature is less than 65°F (adj.).
• AND the supply fan status is on.
• AND the cooling (if present) is not active.
The heating coil valve shall open whenever:
• Supply air temperature drops from 40°F to 35°F (adj.).
• OR the freezestat (if present) is on.
Alarms shall be provided as follows:
• Low Supply Air Temp: If the supply air temperature is 5°F (adj.) less than setpoint.
Economizer: The controller shall measure the mixed air temperature and modulate the economizer dampers in sequence to maintain a setpoint 2°F (adj.) less than the supply air temperature setpoint. The outside air dampers shall maintain a minimum adjustable position of 20% (adj.) open whenever occupied. The economizer shall be enabled whenever:
• Outside air temperature is less than 65°F (adj.).
• AND the outside air enthalpy is less than 22Btu/lb (adj.)
• AND the outside air temperature is less than the return air temperature.
• AND the outside air enthalpy is less than the return air enthalpy.
• AND the supply fan status is on.
The economizer shall close whenever:
• Mixed air temperature drops from 40°F to 35°F (adj.)
• OR the freezestat (if present) is on.
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• OR on loss of supply fan status.
The outside and exhaust air dampers shall close and the return air damper shall open when the unit is off. If Optimal Start Up is available the mixed air damper shall operate as described in the occupied mode except that the outside air damper shall modulate to fully closed. Minimum Outside Air Ventilation - Fixed Percentage: The outside air dampers shall maintain a minimum adjustable position during building occupied hours and be closed during unoccupied hours. Mixed Air Temperature: The controller shall monitor the mixed air temperature and use as required for economizer control (if present) or preheating control (if present). Alarms shall be provided as follows:
• High Mixed Air Temp: If the mixed air temperature is greater than 90°F (adj.).
• Low Mixed Air Temp: If the mixed air temperature is less than 45°F (adj.).
Return Air Humidity: The controller shall monitor the return air humidity and use as required for economizer control (if present) or humidity control (if present). Alarms shall be provided as follows:
• High Return Air Humidity: If the return air humidity is greater than 70% (adj.).
• Low Return Air Humidity: If the return air humidity is less than 35% (adj.).
Return Air Temperature: The controller shall monitor the return air temperature and use as required for setpoint control or economizer control (if present). Alarms shall be provided as follows:
• High Return Air Temp: If the return air temperature is greater than 90°F (adj.).
• Low Return Air Temp: If the return air temperature is less than 45°F (adj.).
Supply Air Temperature: The controller shall monitor the supply air temperature. Alarms shall be provided as follows:
• High Supply Air Temp: If the supply air temperature is greater than 120°F (adj.).
• Low Supply Air Temp: If the supply air temperature is less than 45°F (adj.).
Hardware Points Software Points
Point Name AI AO BI BO AV BV Loop Sched Trend Alarm Show On Graphic
Building Static Pressure x x x
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Hardware Points Software Points
Point Name AI AO BI BO AV BV Loop Sched Trend Alarm Show On Graphic
Mixed Air Temp x x x
Return Air Humidity x x x
Return Air Temp x x x
Supply Air Static Pressure x x x x
Supply Air Temp x x x
Cooling Valve x x x
Heating Valve x x x
Mixed Air Dampers x x x
Return Fan VFD Speed x x x
Supply Fan VFD Speed x x x
Freezestat x x x x
High Static Shutdown x x x x
Return Air Smoke Detector x x x x
Return Fan Status x x x
Return Fan VFD Fault x x
Supply Air Smoke Detector x x x x
Supply Fan Status x x x
Supply Fan VFD Fault x x x
Preheating Stage 1 x x x
Return Fan Start/Stop x x x
Supply Fan Start/Stop x x x
Building Static Pressure Setpoint x x x
Economizer Mixed Air Temp Setpoint
x x x
Preheating Mixed Air Temp Setpoint
x x x
Supply Air Static Pressure Setpoint
x x x
Supply Air Temp Setpoint x x x
High Building Static Pressure x
High Mixed Air Temp x
High Return Air Humidity x
High Return Air Temp x
High Supply Air Static Pressure x
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Hardware Points Software Points
Point Name AI AO BI BO AV BV Loop Sched Trend Alarm Show On Graphic
High Supply Air Temp x
High Supply Air Temp x
Low Building Static Pressure x
Low Mixed Air Temp x
Low Return Air Humidity x
Low Return Air Temp x
Low Supply Air Static Pressure x
Low Supply Air Temp x
Low Supply Air Temp x
Return Fan Failure x
Return Fan in Hand x
Return Fan Runtime Exceeded x
Supply Fan Failure x
Supply Fan in Hand x
Supply Fan Runtime Exceeded x
Totals 6 5 8 3 5 0 0 0 25 27 26
Total Hardware (22) Total Software (57)
Point Summary
Hardware Points Software Points
Point Name Qty AI AO BI BO AV BV Loop Sched Trend Alarm Show On Graphic
Packaged Gas Fired Rooftop Units (Typical of 1)
Each 4 1 3 5 5 0 0 1 17 11 16
Total (x1)
4 1 3 5 5 0 0 1 17 11 16
Exhaust Fan - On/Off (Typical of 1)
Each 0 0 1 1 0 0 0 1 2 3 2
Total (x1)
0 0 1 1 0 0 0 1 2 3 2
VRF System (Typical of 1)
Each 0 0 0 0 3 1 1 1 6 0 6
Total (x1)
0 0 0 0 3 1 1 1 6 0 6
Variable Air Volume - AHU
(Typical of 1)
Each 6 5 8 3 5 0 0 0 25 27 26
Total (x1)
6 5 8 3 5 0 0 0 25 27 26
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Hardware Points Software Points
Project Totals 10 6 12 9 13 1 1 3 50 41 50
Total Hardware (37) Total Software (109)
Outside Air Conditions (typ.)
Outside Air Conditions:
The controller shall monitor the outside air temperature and humidity and calculate the
outside air enthalpy on a continual basis. These values shall be made available to the
system at all times.
Alarm shall be generated as follows:
• Sensor Failure: Sensor reading indicates shorted or disconnected sensor. In the event of a sensor failure, an alternate outside air conditions sensor shall be made available to the system without interruption in sensor readings.
If an OA Temp Sensor cannot be read, a default value of 65°F will be used.
If an OA Humidity Sensor cannot be read, a default value of 50 % will be used.
Outside Air Temperature History:
The controller shall monitor and record the high and low temperature readings for the
outside air. These readings shall be recorded on a daily, month-to-date, and year-to-date
basis.
Hardware Points Software Points
Point Name AI AO BI BO AV BV Loop Sched Trend Alarm Show On
Graphic
Outside Air Humidity x x x
Outside Air Temp x x x
Outside Air Enthalpy x x x
High Temp Month-to-Date x x
High Temp Today x x
High Temp Year-to-Date x x
Low Temp Month-to-Date x x
Low Temp Today x x
Low Temp Year-to-Date x x
Sensor Failure x
Totals 2 0 0 0 1 0 0 0 9 1 9
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Hardware Points Software Points
Point Name AI AO BI BO AV BV Loop Sched Trend Alarm Show On
Graphic
Total Hardware (2) Total Software (11)
Hot Water Loop Pumps (typ.) Hot Water Pump Run Conditions: The hot water pumps shall be enabled whenever:
• A definable number of hot water coils need heating.
• AND outside air temperature is less than 65°F (adj.).
The pumps shall run for freeze protection anytime outside air temperature is less than 38°F (adj.).
To prevent short cycling, the pump shall run for a minimum time and be off for a minimum time (both user adjustable). Hot Water Pump Lead/Lag Operation: The two hot water pumps shall operate in a lead/lag fashion.
• The lead pump shall run first.
• On failure of the lead pump, the lag pump shall run and the lead pump shall turn off.
• On decreasing hot water differential pressure, the lag pump shall stage on and run in unison with the lead pump to maintain hot water differential pressure setpoint.
The designated lead pump shall rotate upon one of the following conditions (user selectable):
• manually through a software switch
• if pump runtime (adj.) is exceeded
• daily
• weekly
• monthly
Alarms shall be provided as follows: • Hot Water Pump 1
• Failure: Commanded on, but the status is off.
• Running in Hand: Commanded off, but the status is on.
• Runtime Exceeded: Status runtime exceeds a user definable limit.
• Hot Water Pump 2
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• Failure: Commanded on, but the status is off.
• Running in Hand: Commanded off, but the status is on.
• Runtime Exceeded: Status runtime exceeds a user definable limit.
Hot Water Differential Pressure Control: The controller shall measure hot water differential pressure and stage the hot water pumps on in sequence to maintain its hot water differential pressure setpoint. The lead pump shall run first. The following setpoints are recommended values. All setpoints shall be field adjusted during the commissioning period to meet the requirements of actual field conditions. If the hot water differential pressure drops below a setpoint of 12lbf/in2 (adj.), the lag pump shall turn on and run in unison with the lead pump. If the hot water differential pressure rises back to 4lbf/in2 (adj.) above setpoint, the lag pump shall turn off and the lead pump shall continue to run. To prevent short cycling, there shall be a minimum user definable (adj.) delay between stages. Alarms shall be provided as follows:
• High Hot Water Differential Pressure: If the hot water differential pressure is greater than 18lbf/in2 (adj.).
• Low Hot Water Differential Pressure: If the hot water differential pressure is less than 10lbf/in2 (adj.).
The following temperatures shall be monitored: • Hot water supply.
• Hot water return.
Alarms shall be provided as follows: • High Hot Water Supply Temp: If the hot water supply temperature is greater
than 200°F (adj.).
• Low Hot Water Supply Temp: If the hot water supply temperature is less than 100°F (adj.).
Hardware Points Software Points
Point Name AI AO BI BO AV BV Loop Sched Trend Alarm Show On Graphic
Hot Water Differential Pressure
x x x
Hot Water Return Temp x x x
Hot Water Supply Temp x x x
Hot Water Pump 1 Status x x x
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Hardware Points Software Points
Point Name AI AO BI BO AV BV Loop Sched Trend Alarm Show On Graphic
Hot Water Pump 2 Status x x x
Hot Water Pump 1 Start/Stop x x x
Hot Water Pump 2 Start/Stop x x x
Hot Water Differential Pressure Setpoint
x x
Outside Air Temp x x
High Hot Water Differential Pressure
x
High Hot Water Supply Temp x
Hot Water Pump 1 Failure x
Hot Water Pump 1 Running in Hand
x
Hot Water Pump 1 Runtime Exceeded
x
Hot Water Pump 2 Failure x
Hot Water Pump 2 Running in Hand
x
Hot Water Pump 2 Runtime Exceeded
x
Low Hot Water Differential Pressure
x
Low Hot Water Supply Temp x
Totals 3 0 2 2 2 0 0 0 7 10 9
Total Hardware (7) Total Software (19)
Single Boiler System (typ.) Cold Water Start: A three-way valve shall be provided at the boiler and shall be controlled by the EMCS. Three-way valve shall be modulated to maintain a return water temperature greater than 120°F during start-up conditions. Once the system is heated up and has return water temperatures of 120°F or higher, the mixing of outlet water with inlet water is no longer needed and the bypass shall be shut off. Boiler System Run Conditions: The boiler system shall be enabled to run whenever:
• A definable number of hot water coils need heating.
• AND outside air temperature is less than 65°F (adj.).
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To prevent short cycling, the boiler system shall run for and be off for minimum adjustable times (both user definable), unless shutdown on safeties or outside air conditions. The boiler shall run subject to its own internal safeties and controls. The boiler system shall also run for freeze protection whenever outside air temperature is less than 38°F (adj.). Boiler Safeties: The following safeties shall be monitored:
• Boiler alarm.
• Low Water Level.
Alarms shall be provided as follows:
• Boiler alarm.
• Low Water Level alarm.
Hot Water Pump Lead/Lag Operation: The two hot water pumps shall operate in a lead/lag fashion.
• The lead pump shall run first.
• On failure of the lead pump, the lag pump shall run and the lead pump shall turn off.
• On decreasing hot water differential pressure, the lag pump shall stage on and run in unison with the lead pump to maintain hot water differential pressure setpoint.
The designated lead pump shall rotate upon one of the following conditions (user selectable):
• manually through a software switch
• if pump runtime (adj.) is exceeded
• daily
• weekly
• monthly
Alarms shall be provided as follows:
• Hot Water Pump 1
• Failure: Commanded on, but the status is off.
• Running in Hand: Commanded off, but the status is on.
• Runtime Exceeded: Status runtime exceeds a user definable limit.
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• Hot Water Pump 2
• Failure: Commanded on, but the status is off.
• Running in Hand: Commanded off, but the status is on.
• Runtime Exceeded: Status runtime exceeds a user definable limit.
Hot Water Differential Pressure Control: The controller shall measure hot water differential pressure and stage the hot water pumps on in sequence to maintain its hot water differential pressure setpoint. The lead pump shall run first. The following setpoints are recommended values. All setpoints shall be field adjusted during the commissioning period to meet the requirements of actual field conditions. If the hot water differential pressure drops below a setpoint of 12lbf/in2 (adj.), the lag pump shall turn on and run in unison with the lead pump. If the hot water differential pressure rises back to 4lbf/in2 (adj.) above setpoint, the lag pump shall turn off and the lead pump shall continue to run. To prevent short cycling, there shall be a minimum user definable (adj.) delay between stages. Alarms shall be provided as follows:
• High Hot Water Differential Pressure: If the hot water differential pressure is greater than 18lbf/in2 (adj.).
• Low Hot Water Differential Pressure: If the hot water differential pressure is less than 10lbf/in2 (adj.).
Circulation Pump: The circulation pump shall run anytime the boiler is called to run and shall have a user definable (adj.) delay on stop. Alarms shall be provided as follows:
• Circulation Pump Failure: Commanded on, but the status is off.
• Circulation Pump Running in Hand: Commanded off, but the status is on.
• Circulation Pump Runtime Exceeded: Status runtime exceeds a user definable limit.
Boiler Enable: The boiler shall be enabled when the boiler system is commanded on. The boiler shall be enabled after pump status is proven on and shall run subject to its own internal safeties and controls. Alarms shall be provided as follows:
• Boiler Failure: Commanded on, but the status is off.
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• Boiler Running in Hand: Commanded off, but the status is on.
• Boiler Runtime Exceeded: Status runtime exceeds a user definable limit.
Hot Water Supply Temperature Setpoint: The boiler shall maintain a hot water supply temperature setpoint as determined by its own internal controls (provided by others). Primary Hot Water Temperature Monitoring: The following temperatures shall be monitored:
• Primary hot water supply.
• Primary hot water return.
Alarms shall be provided as follows: • High Primary Hot Water Supply Temp: If greater than 200°F (adj.).
• Low Primary Hot Water Supply Temp: If less than 100°F (adj.).
Hardware Points Software Points
Point Name AI AO BI BO AV BV Loop Sched Trend Alarm Show On Graphic
Hot Water Differential Pressure
x x x
Primary Hot Water Return Temp
x x x
Primary Hot Water Supply Temp
x x x
Boiler Alarm Status x x x x
Boiler Status x x x
Circulation Pump Status x x x
Hot Water Pump 1 Status x x x
Hot Water Pump 2 Status x x x
Low Water Level x x x x
Boiler Enable x x
Circulation Pump Start/Stop x x x
Hot Water Pump 1 Start/Stop x x
Hot Water Pump 2 Start/Stop x x
Hot Water Differential Pressure Setpoint
x x
Outside Air Temp x x
Boiler Failure x
Boiler Running in Hand x
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Hardware Points Software Points
Point Name AI AO BI BO AV BV Loop Sched Trend Alarm Show On Graphic
Boiler Runtime Exceeded x
Circulation Pump Failure x
Circulation Pump Running in Hand
x
Circulation Pump Runtime Exceeded
x
High Hot Water Differential Pressure
x
High Primary Hot Water Supply Temp
x
Hot Water Pump 1 Failure x
Hot Water Pump 1 Running in Hand
x
Hot Water Pump 1 Runtime Exceeded
x
Hot Water Pump 2 Failure x
Hot Water Pump 2 Running in Hand
x
Hot Water Pump 2 Runtime Exceeded
x
Low Hot Water Differential Pressure
x
Low Primary Hot Water Supply Temp
x
Totals 3 0 6 4 2 0 0 0 10 18 15
Total Hardware (13) Total Software (30)
SEQUENCE OF OPERATIONS FOR HVAC CONTROLS 23 09 93 - 21
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Point Summary
Hardware Points Software Points
Point Name Qty AI AO BI BO AV BV Loop Sched Trend Alarm Show On Graphic
Hot Water Loop Pumps
(Typical of 1)
Each 3 0 2 2 2 0 0 0 7 10 9
Total (x1)
3 0 2 2 2 0 0 0 7 10 9
Single Boiler System
(Typical of 1)
Each 3 0 6 4 2 0 0 0 10 18 15
Total (x1)
3 0 6 4 2 0 0 0 10 18 15
Project Totals 6 0 8 6 4 0 0 0 17 28 24
Total Hardware (20) Total Software (49)
APPENDIX A: Glossary of Terms
Terms used within the Specification Text:
• Advanced Application Controller (AAC): A fully programmable control module. This control module may be capable of some of the advanced features found in Building Controllers (storing trends, initiating read and write requests, etc.) but it does not serve as a master controller. Advanced Application Controllers may reside on either the Ethernet/IP backbone or on a subnet.
• Application Specific Controller (ASC): A pre-programmed control module which is intended for use in a specific application. ASCs may be configurable, in that the user can choose between various pre-programmed options, but it does not support full custom programming. ASCs are often used on terminal equipment such as VAV boxes or fan coil units. In many vendors' architectures ASCs do not store trends or schedules but instead rely upon a Building Controller to provide those functions.
• BACnet/IP: An approved BACnet network type which uses an Ethernet carrier and IP addressing.
• BACnet MS/TP: An approved BACnet network type which uses a Master-Slave Token Passing configuration. MS/TP networks are unique to BACnet and utilize EIA485 twisted pair topology running at 9600 to 76,800 bps.
• BACnet over ARCNET:
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An approved BACnet network type which uses an ARCNET (attached resource computer network) carrier. ARCNET is an industry standard that can utilize several speeds and wiring standards. The most common configuration used by BACnet controllers is an EIA485 twisted pair topology running at 156,000 bps.
• Building Controller (BC): A fully programmable control module which is capable of storing trends and schedules, serving as a router to devices on a subnet, and initiating read and write requests to other controllers. Typically this controller is located on the Ethernet/IP backbone of the BAS. In many vendors' architectures a Building Controller will serve as a master controller, storing schedules and trends for controllers on a subnet underneath the Building Controller.
• Direct Digital Control (DDC): A control system in which a digital computer or microprocessor is directly connected to the valves, dampers, and other actuators which control the system, as opposed to indirectly controlling a system by resetting setpoints on an analog pneumatic or electronic controller.
• PICS - Protocol Implementation Conformance Statement: A written document, created by the manufacturer of a device, which identifies the particular options specified by BACnet that are implemented in the device.
• Smart Actuator (SA): An actuator which is controlled by a network connection rather than a binary or analog signal. (0-10v, 4-20mA, relay, etc.)
• Smart Sensor (SS): A sensor which provides information to the BAS via network connection rather than a binary or analog signal. (0-10000 ohm, 4-20mA, dry contact, etc.)
• Web services: Web services are a standard method of exchanging data between computer systems using the XML (extensible markup language) and SOAP (simple object access protocol) standards. Web services can be used at any level within a Building Automation System (BAS), but most commonly they are used to transfer data between BAS using different protocols or between a BAS and a non-BAS system such as a tenant billing system or a utility management system.
Terms used within the Sequences of Operation:
• adj. Adjustable by the end user, through the supplied user interface.
• AI, AO, etc. (Column Headings on Points List) AI = Analog Input. A physical input to the control module.
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AO = Analog Output. A physical output from the control module. AV = Analog Value. An intermediate (software) point that may be editable or read-only. Editable AVs are typically used to allow the user to set a fixed control parameter, such as a setpoint. Read Only AVs are typically used to display the status of a control operation. BI = Binary Input. A physical input to the control module. BO = Binary Output. A physical output from the control module. BV = Binary Value. An intermediate (software) point that may be editable or read-only. Editable BVs are typically used to allow the user to set a fixed control parameter, such as a setpoint. Read Only BVs are typically used to display the status of a control operation. Loop = A control loop. Most commonly a PID control loop. Typically a control loop will include a setpoint, an input which is compared to the setpoint, and an output which controls some action based upon the difference between the input and the setpoint. A PID control loop will also include gains for the proportional, integral, and derivative response as well as an interval which controls how frequently the control loop updates its output. These gains may be adjustable by the end user for control loop "tuning," but in self-tuning control loops or loops which have been optimized for a specific application the gains may not be adjustable. Sched = Schedule. The control algorithm for this equipment shall include a user editable schedule. Trend. The control system shall be configured to collect and display a trend log of this object. The trending interval shall be no less than one sample every 5 minutes. (Change of Value trending, where a sample is taken every time the value changes by more than a user-defined minimum, is an acceptable alternative.) Alarm. The control system shall be configured to generate an alarm when this object exceeds user definable limits, as described in the Sequence of Controls. Note: If the specifications require use of the BACnet protocol, all of the above shall be provided as BACnet objects.
• KW Demand Limiting: * An energy management strategy that reduces energy consumption when a system's electric power meter exceeds an operator-defined threshold. When power consumption exceeds defined levels, the system automatically adjust setpoints, de-energizes low priority equipment, and takes other pre-programmed actions to avoid peak demand charges. As the demand drops, the system restores loads in a predetermined manner.
• Occupant Override Switch, or Timed Local Override: A control option that allows building occupants to override the programmed HVAC schedule for a limited period of time. When the override time expires, the zone returns to its unoccupied state.
• Occupant Setpoint Adjustment: A control option that allows building occupants to adjust - within limits set by the HVAC control system - the heating and cooling setpoints of selected zones. Typically the user interface for this function is built into the zone sensor.
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• Optimal Start-Up: * A control strategy that automatically starts an HVAC system at the latest possible time yet ensures comfort conditions by the time the building becomes occupied. In a typical implementation, a controller measures the temperature of the zone and the outside air. Then, using design heating or cooling capacity at the design outside air temperature, the system computes how long a unit must run at maximum capacity to bring the zone temperature to its occupied setpoint. The optimal start algorithm often includes a self-learning feature to adjust for variations from design capacity. A distributed system must use Run on Request with Optimal Start. (See below.)
• Requested, or Run on Request: * A control strategy that optimizes the runtime of a source piece of equipment that supplies one or more receiving units - such as an air handler unit supplying zone terminal units with heating, cooling, ventilation, or similar service. Source equipment runs only when needed, not on a fixed schedule. The source equipment runs when one or more receiving units request its services. An operator determines how many requests are required to start the source equipment. For example, if all the zones in a building are unoccupied and the zone terminal units do not need heating or cooling, the AHU will shut down. However, if a zone becomes occupied or needs cooling, the terminal unit will send a run request to the AHU to initiate the start-up sequence. If this AHU depends on a central chiller, it can send a run request to the chiller. The run on request algorithm also allows an operator to schedule occupancy for individual zones based on the needs of the occupants without having to adjust the schedules of related AHUs and chillers.
• Trim and Respond, or Setpoint Optimization: * A control strategy that optimizes the setpoint of a source piece of equipment that supplies one or more receiving units - such as an air handler unit supplying zone terminal units with heating, cooling, ventilation, or similar service. The source unit communicates with receiving units to determine heating, cooling, and other requirements, and then adjusts its setpoint. For example, if all zones are comfortable and do not request cooling, the AHU will gradually increase (trim) its supply air setpoint. When a zone requests cooling, the AHU responds by dropping its setpoint. The more zones that request cooling, the more it drops the setpoint. The AHU repeats this process throughout the day to keep zones cool, but with a supply air setpoint that is no cooler than necessary.
Contracting Terms:
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• Furnished or Provided: The act of supplying a device or piece of equipment as required meeting the scope of work specified and making that device or equipment operational. All costs required to furnish the specified device or equipment and make it operational are borne by the division specified to be responsible for providing the device or equipment.
• Install or Installed: The physical act of mounting, piping or wiring a device or piece of equipment in accordance with the manufacturer's instructions and the scope of work as specified. All costs required to complete the installation are borne by the division specified to include labor and any ancillary materials.
• Interface: The physical device required to provide integration capabilities from an equipment vendor's product to the control system. The equipment vendor most normally furnishes the interface device. An example of an interface is the chilled water temperature reset interface card provided by the chiller manufacturer in order to allow the control system to integrate the chilled water temperature reset function into the control system.
• Integrate: The physical connections from a control system to all specified equipment through an interface as required to allow the specified control and monitoring functions of the equipment to be performed via the control system.
APPENDIX B: Abbreviations
The following abbreviations may be used in graphics, schematics, point names, and other UI applications where space is at a premium.
AC - Air Conditioning ACU - Air Conditioning Unit AHU - Air Handling Unit AI - Analog Input AO - Analog Output AUTO - Automatic AUX - Auxiliary BI - Binary Input BO - Binary Output C - Common CHW - Chilled Water CHWP - Chilled Water Pump CHWR - Chilled Water Return CHWS - Chilled Water Supply COND - Condenser CW - Condenser Water CWP - Condenser Water Pump CWR - Condenser Water Return CWS - Condenser Water Supply DA - Discharge Air
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EA - Exhaust Air EF - Exhaust Fan EVAP - Evaporators FCU - Fan Coil Unit HOA - Hand / Off / Auto HP - Heat Pump HRU - Heat Recovery Unit HTEX - Heat Exchanger HW - Hot Water HWP - Hot Water Pump HWR - Hot Water Return HWS - Hot Water Supply MAX - Maximum MIN - Minimum MISC - Miscellaneous NC - Normally Closed NO - Normally Open OA - Outdoor Air PIU - Powered Induction Unit RA - Return Air RF - Return Fan RH - Relative Humidity RTU - Roof-top Unit SA - Supply Air SF - Supply Fan SP - Static Pressure TEMP - Temperature UH - Unit Heater UV - Unit Ventilator VAV - Variable Air Volume VVTU - Variable Volume Terminal Unit W/ - with W/O - without WSHP - Water Source Heat Pump
REFRIGERANT PIPING 232300 - 1
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SECTION 232300 - REFRIGERANT PIPING
PART 1 - GENERAL
1.1 SCOPE OF WORK
A. The Scope of the Work of this Section of the Specifications shall include the furnishing
of all labor, materials, tools, equipment and services required to complete the Refrigerant
Handling, Pipe, Valves, Fittings & Specialties Work as hereinafter specified or as
indicated on the drawings or as noted in the equipment manufacturers piping
specifications and drawings. Without limiting the above "Scope" the work shall generally
include, but is not necessarily limited to the following:
1. Providing of pipe, pipe fittings, valves, specialties, controls and accessories
specifically manufactured for refrigeration service in accordance with the
requirements hereinafter specified and the equipment manufacturer installation
manual.
2. Proper refrigerant handling, installation and removal as required.
3. All work shall comply with equipment manufacturers written installation
instructions.
B. Related work specified in other Divisions or Sections of the Specifications shall
generally consist of, but is not necessarily limited to the following:
1. Section 230593 - Testing, Adjusting, And Balancing For HVAC
1.2 PIPE & PIPE FITTINGS
A. Each length of pipe or fitting furnished shall be marked with the manufacturer's name,
brand and specification code designator to which it conforms. All aboveground pipe and
fittings to be painted shall be bare or coated with an easily removed mill primer, while
pipe and fittings to be insulated shall be provided with a regular mill representative
primer with insulation applied over the primer.
1.3 WELDING & BRAZING
A. When welding is required, submit (3) copies of Welding Procedure Specification (WPS)
and three (3) copies of the Brazing Procedure Specification (BPS) when brazing, for all
metals to be used in accordance with ANSI/ASME B31.9 & B31.5 refrigerant piping.
Submit Welder's Performance Qualification, Technique Sheet (QW-487) and Welder/
Operator Qualification Test From (QW-484) as outlined in ASME Code Section IX.
Similar submittals for brazers shall be submitted. All welding procedures shall comply
with AWS D10.9 Qualification of Welding Procedures and Welders for Piping & Tubing.
All brazing procedures shall comply with ANSI AWS B.2.2 “Standard for Brazing
Procedure and Performance Qualifications”. Safety in brazing, welding and cutting of
pipe shall conform to ANSI Z49.1.
1.4 REFRIGERANT HANDLING
A. Refrigerants used on this project specified herein and throughout this specification shall
conform to ANSI/ASHRAE 34, Number Designation and Safety Classification of
Refrigerants.
REFRIGERANT PIPING 232300 - 2
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B. All refrigeration work on this project shall conform to ANSI/ASHRAE 15, Safety Code
for Mechanical Refrigeration.
C. Addition or removal of refrigerant from equipment, if required, shall be done without
releasing refrigerants to the atmosphere in accordance with the Clean Air Act and
ANSI/ASHRAE 15. Persons handling refrigerants shall be EPA/RSES certified and shall
submit three (3) copies of certification/certificate to be kept on file at the
Architect/Engineer=s office.
1.5 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 01 Specification Sections, apply to this Section.
1.6 SUMMARY
A. This Section includes refrigerant piping used for air-conditioning applications.
1.7 PERFORMANCE REQUIREMENTS
A. Line Test Pressure for Refrigerant R-410A:
1. Suction Lines for Air-Conditioning Applications: 300 psig.
2. Suction Lines for Heat-Pump Applications: 535 psig.
3. Hot-Gas and Liquid Lines: 535 psig.
1.8 ACTION SUBMITTALS
A. Manufacturer's Literature and Product Data: For each type of valve and refrigerant piping
specialty indicated. Include pressure drop, based on manufacturer's test data, for the
following:
1. Thermostatic expansion valves.
2. Solenoid valves.
3. Hot-gas bypass valves.
4. Filter dryers.
5. Strainers.
6. Pressure-regulating valves.
7. Tubing and fittings.
B. Shop Drawings: Show layout of refrigerant piping and specialties, including pipe, tube,
and fitting sizes, flow capacities, valve arrangements and locations, slopes of
horizontal runs, oil traps, double risers, wall and floor penetrations, and equipment
connection details. Show interface and spatial relationships between piping and
equipment.
1. Shop Drawing Scale: 1/4 inch equals 1 foot.
2. Refrigerant piping indicated on Drawings is schematic only. Size piping and
design actual piping layout, including oil traps, double risers, specialties, and
pipe and tube sizes to accommodate, as a minimum, equipment provided,
elevation difference between compressor and evaporator, and length of piping to
ensure proper operation and compliance with warranties of connected equipment.
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1.9 INFORMATIONAL SUBMITTALS
A. Welding certificates.
B. Field quality-control test reports.
1.10 CLOSEOUT SUBMITTALS
A. Operation and Maintenance Data: For refrigerant valves and piping specialties to include
in maintenance manuals.
1.11 QUALITY ASSURANCE
A. Welding: Qualify procedures and personnel according to ASME Boiler and Pressure
Vessel Code: Section IX, "Welding and Brazing Qualifications."
B. Comply with ASHRAE 15, "Safety Code for Refrigeration Systems."
C. Comply with ASME B31.5, "Refrigeration Piping and Heat Transfer Components."
1.12 PRODUCT STORAGE AND HANDLING
A. Store piping and specialties in a clean and protected area with end caps in place until
installation to ensure that piping interior and exterior are clean when installed.
1.13 COORDINATION
A. Coordinate size and location of roof curbs, equipment supports, and roof penetrations.."
PART 2 - PRODUCTS
2.1 COPPER TUBE AND FITTINGS
A. Copper Tube: ASTM B 280, Type ACR.
B. Wrought-Copper Fittings: ASME B16.22.
C. Wrought-Copper Unions: ASME B16.22.
D. Solder Filler Metals: ASTM B 32. Alloy HB solder to join copper socket fittings on
copper pipe.
E. Brazing Filler Metals: Metal filler shall be of a copper, phosphorous, silver alloy,
ANSI/ASW A5.8 BCUP.5 conformance with a melting range of 1190 deg F to 1500 deg
F, AWS A5.8.
F. Flexible Connectors:
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1. Body: Tin-bronze bellows with woven, flexible, tinned-bronze-wire-reinforced
protective jacket.
2. End Connections: Socket ends.
3. Offset Performance: Capable of minimum 3/4-inch misalignment in minimum 7-
inch- long assembly.
4. Pressure Rating: Factory test at minimum 500 psig.
5. Maximum Operating Temperature: 250 deg F.
G. Flux: Braxing flux shall conform to ANSI/AWS A5.31, Type F53-A or F53-C.
2.2 STEEL PIPE AND FITTINGS
A. Flexible Connectors:
1. Body: Stainless-steel bellows with woven, flexible, stainless-steel-wire-
reinforced protective jacket
2. End Connections:
a. NPS 2 and Smaller: With threaded-end connections.
b. NPS 2-1/2 and Larger: With flanged-end connections.
3. Offset Performance: Capable of minimum 3/4-inch misalignment in minimum 7-
inch- long assembly.
4. Pressure Rating: Factory test at minimum 500 psig.
5. Maximum Operating Temperature: 250 deg F.
2.3 VALVES AND SPECIALTIES
A. Diaphragm Packless Valves:
1. Body and Bonnet: Forged brass or cast bronze; globe design with straight-
through or angle pattern.
2. Diaphragm: Phosphor bronze and stainless steel with stainless-steel spring.
3. Operator: Rising stem and hand wheel.
4. Seat: Nylon.
5. End Connections: Socket, union, or flanged.
6. Working Pressure Rating: 500 psig.
7. Maximum Operating Temperature: 275 deg F.
B. Packed-Angle Valves:
1. Body and Bonnet: Forged brass or cast bronze.
2. Packing: Molded stem, back seating, and replaceable under pressure.