Copyright 2000 Carrier Corporation Form 50TJ-9PD Standard-Efficiency Rooftop Units with: • Pre-painted galvanized steel cabinet for long life and quality appearance • Commercial strength base rails with built-in rigging capability • Convertible design for vertical or horizontal supply/return • Non-corrosive, sloped condensate drain pan, meets ASHRAE 62-89 (IAQ) • Two-inch return-air filters • A wide assortment of factory- installed options available, includ- ing high static drives that provide additional performance range Features/Benefits Every compact one-piece unit arrives fully assembled, charged, tested, and ready to run. Durable, dependable construction Designed for durability in any climate, the weather-resistant cabinets are con- structed of galvanized steel, bonder- ized, and all exterior panels are coated with a prepainted baked enamel finish. The paint finish is non-chalking, and is capable of withstanding ASTM B117 500-hour Salt Spray Test. All internal cabinet panels are primed, permitting longer life and a more attractive appearance for the entire unit. In addi- tion, the 50TJ008-014 units are de- signed with a single, continuous top piece to eliminate any possible leaks. Totally enclosed condenser-fan motors and permanently-lubricated bearings provide additional unit dependability. 50TJ004-014 Single-Package Rooftop Units Electric Cooling with Electric Heat Option 3 to 12.5 Nominal Tons Product Data 50TJ004-007 50TJ008-014
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Embed
Product 50TJ004-014 Data Electric Cooling with Electric ... · 5 LEGEND *Air Conditioning and Refrigeration Institute. †Applies only to units with capacity of 65,000 Btuh or less.
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• Two-inch return-air filters• A wide assortment of factory-
installed options available, includ-ing high static drives that provide additional performance range
Features/BenefitsEvery compact one-piece unit arrives fully assembled, charged, tested, and ready to run.Durable, dependableconstructionDesigned for durability in any climate, the weather-resistant cabinets are con-structed of galvanized steel, bonder-ized, and all exterior panels are coated with a prepainted baked enamel finish. The paint finish is non-chalking, and is capable of withstanding ASTM B117 500-hour Salt Spray Test. All internal cabinet panels are primed, permitting longer life and a more attractive appearance for the entire unit. In addi-tion, the 50TJ008-014 units are de-signed with a single, continuous top piece to eliminate any possible leaks. Totally enclosed condenser-fan motors and permanently-lubricated bearings provide additional unit dependability.
50TJ004-014Single-Package Rooftop Units
Electric Coolingwith Electric Heat Option
3 to 12.5 Nominal Tons
ProductData
50TJ004-007
50TJ008-014
2
Easy installation andconversionAll units are shipped in the vertical dis-charge configuration for fit-up tostandard roof curbs. (Two different curb sizes fit unit sizes 004-007 and 008-014 respectively.) The contractor can order and install the roof curb early in the construction stage, before deci-sions on size requirements are made.
All units feature roll-formed base rail design with forklift slots and rigging holes for easier maneuvering. (Forklift slots are found on 3 sides.) Durable packaging protects all units during shipment and storage.
The units can be easily converted from a vertical to a horizontal dis-charge configuration by interchanging the panels supplied with the unit.NOTE: On units using horizontal sup-ply and return, the accessory baromet-ric relief or power exhaust MUST be installed on the return ductwork.
The non-corrosive sloped conden-sate pan permits either an external, horizontal, side condensate drain (out-side the roof curb) or an internal, verti-cal, bottom drain (inside the roof curb). Both options require an external, field-supplied P-trap. Also, the condenser coil grille (available as a field-installed accessory or a factory-installed option) provides a metal plate as an alternate location for the field-supplied discon-nect, if desired.
Field-installed electric heaters are available in a wide range of capacities. Single point wiring kit makes installa-tion simple.
The 50TJ units were designed with the service technician in mind. Thesingle-row condenser coils on the 50TJ004-006 and 008 units simplify the cleaning process. In addition, the
50TJ004-014 units have a standardfilter access panel, which permits tool-less filter changes, even on units with horizontal economizers.
Indoor-air quality begins with Carrier rooftopsSloped condensate pans minimize bio-logical growth in rooftop units inaccordance with ASHRAE (American Society of Heating, Refrigeration, and Air Conditioning Engineers)Standard 62. Two-in. filters with optional dirty filter indicator switch provide for greater particle reduction in the return air. The face-split evaporator coils improve the dehumidification capability of the standard units, and standard enthalpy controls provided with the optional or accessory econo-mizers maximize building humiditycontrol.
Simple electrical connectionsTerminal boards, located in the base unit control box, facilitate connections to room thermostat, outdoor ther-mostat(s), economizer, and electric heat. Service panels are quickly removed, permitting easy servicing.
Thru-the-bottom service connection capability allows power and control wiring to be routed through the unit basepan, minimizing roof penetrations. Both power and control connections are made on the same side of the unit to simplify installation. In addition, color-coded wires permit easy tracing and diagnostics.
Proven compressor reliabilityDesign techniques feature computer-programmed balance between com-pressor, condenser, and evaporator. Carrier-specified hermetic compres-sors are equipped with compressor overcurrent and overtemperature
protection to ensure dependability. All units have Carrier’s exclusive Acutrol™ metering device to precisely control refrigerant flow (preventing slugging and flood-back) while maintaining opti-mum unit performance. Filter driers are standard.
Integrated economizers and outdoor airDuring a first stage call for cooling, if the outdoor-air temperature is below the economizer control changeover set point, the discharge-air sensor modu-lates the economizer outdoor-air damper open taking, advantage of free cooling provided by outside air. When second-stage cooling is called for, the compressor is energized in addition to the economizer. If the outdoor-air tem-perature is above the changeover set point, the first stage of compression is activated and the economizer stays at vent position. Durablade economizer operation is controlled by a dry-bulb thermostat that senses outdoor-air temperature. Accessory upgrade kits allow for either outdoor air enthalpy changeover or for more precise differ-ential enthalpy control.
The Durablade type economizer has a reliable sliding plate damper which is easily adjusted for 100% outdoor air, 100% return air, or any proportions of mixed air.
The 50TJ004-014 units also utilize the optional field or factory-installed EconoMi$er. This newly designed EconoMi$er incorporates a parallel-opposed blade design. In addition, the EconoMi$er has a spring return built into the damper motor to provide reli-able close-on-power-loss. The EconoMi$er comes equipped with up to 100% barometric relief capability for high outdoor airflow applications.
In addition, the EconoMi$er baro-metric relief damper or integrated power exhaust accessory can be uti-lized to help maintain proper building pressure.
For units without economizer, year-round ventilation is enhanced by a manual outdoor-air damper (ordered as an accessory or an option). The damper can be preset to admit up to 25% out-door air.
Quiet, efficient operation and dependable performanceCompressors have vibration isolators for extremely quiet operation. Efficient fan and motor design permits opera-tion at very low sound levels, and all compressors are mounted on an inde-pendent mounting plate.
Quiet and efficient operation is pro-vided by belt-driven evaporator fans (standard on all units over 5 tons). The belt-driven evaporator-fan withvariable-pitch pulleys allows adjustment to available static pressure to meet the job requirements of even the most de-manding applications.
Carrier Apollo controls add reliability, efficiency, andsimplificationThe Apollo direct digital controls are ordered as a factory-installed option. Designed and manufactured exclusively by Carrier, the controls can be used to actively monitor and control all modes of operation, as well as to monitor evaporator-fan status, filter status, indoor-air quality (humidity and carbon dioxide), supply-air temperature, and outdoor-air temperature.
The Apollo communicating controls are factory-installed into the rooftop unit evaporator-fan section (004-007) or unit control box (008-014), and come equipped with built-in diagnostic capabilities. Light-emitting diodes (LEDs) simplify troubleshooting by indi-cating thermostat commands for both stages of heating and cooling, evapora-tor fan operation, and economizer
operation. The Apollo communicating controls are designed to work specifi-cally with the Carrier TEMP and VVT® (variable volume and temperature) ther-mostats. The Apollo controls, com-bined with Carrier thermostats, incorporate a 5-minute recycle delay timer between modes of operation to prevent short cycling.
The standard rooftop control system is readily adaptable to all conventional and programmable thermostats. In addition, units with the Apollo controls are suitable for integration into building monitor control systems if required. This system gives the 50TJ units the flexibility to communicate with almost any thermostat or building controlsystem.
Energy$Recycler — the IAQ solution for today’s “tight” buildingsIndoor-air quality (IAQ) generally refers to the level of pollutants inside a build-ing. These pollutants include cigarette smoke, carbon dioxide exhaled by oc-cupants, radon gas, car exhaust, paint fumes, and odors.
Concern over increased indoor air pollutants has been spurred by several issues: 1) changes in new building
construction methods and retrofit of older buildings have reduced air infiltra-tion rates; 2) Synthetic materials re-lease airborne particles, odors, and chemicals; and 3) HVAC (heating, ven-tilation, and air conditioning) systems that bring in minimal fresh air.
In 1989, IAQ concerns caused ASHRAE to recommend increased ventilation for all public buildings. Sim-ply introducing fresh air into a building, however, is not always practical or costeffective. Additional ventilation can overload HVAC systems and increase energy costs.
Carrier’s 62AQ Energy$Recycler unit solves this dilemma by providing increased fresh air while keeping in-creased costs to a minimum. In addi-tion, the Energy$Recycler helps re-duce humidity levels, which helps to prevent deterioration of building mate-rials and retards the growth of mold and mildew.
The 62AQ Energy$Recycler unit provides the best solution to retaining the energy-conserving benefits of to-day’s tighter building construction while improving indoor-air quality.
Features/Benefits (cont)
EXHAUSTAIR
CONDENSER-FANDISCHARGE AIR
FRESH AIRINLET
MOUNTINGKIT
FILTERACCESS
OUTDOOR-AIRINLET
RETURN AIRBAFFLE
ROOF CURB
RETURN AIR
SUPPLY AIR
OUTDOOR AIRFLOW
INDOOR AIRFLOW
UNIT WITH ENERGY$RECYCLER
4
Model number nomenclature
LEGEND
*Refer to 50TJ Price Pages for 50TJ FIOP code table or contactyour local Carrier representative for more details.
†Single phase is only available on 5-ton and smaller units.**High-static motors are not available on single-phase units and size
014 units.
Al — AluminumCu — CopperFIOP — Factory-Installed Option
Quality Assurance
5
LEGEND
*Air Conditioning and Refrigeration Institute.†Applies only to units with capacity of 65,000 Btuh or less.
**The IPLV applies only to 2-stage cooling units.
NOTES:1. Rated in accordance with ARI Standards 210/240-89 (004-012) or 360-86 (014) and 270-84.2. Ratings are net values, reflecting the effects of circulating fan heat.3. Ratings are based on:
Cooling Standard: 80 F db, 67 F wb indoor entering-air temperature and 95 F db air entering outdoor unit.IPLV Standard: 80 F db, 67 F wb indoor entering-air temperature and 80 F db outdoor entering-air temperature.
OUTDOOR-AIR INLET SCREENS CleanableQuantity...Size (in.) 1...20 x 25 x 1
1...16 x 25 x 1
RETURN-AIR FILTERS ThrowawayQuantity...Size (in.) 4...16 x 20 x 2 4...16 x 20 x 2 4...20 x 20 x 2 4...20 x 20 x 2
Al — AluminumBhp — Brake HorsepowerCu — Copper
Physical data — 50TJ008-014
→
300
8
*Factory installed.†Field installed.
**Electric heat for 575-v units is only offered on 50TJ008-014 units. Accessory single-point kit isrequired for 50TJ004-014 units using electric heat.
††Includes high-pressure, low-pressure/loss-of-charge, and freeze protection switches.||High static motor not available on single-phase and size 014 units.
ITEM OPTION* ACCESSORY†Apollo Direct-Digital Communicating Controls XEnergy$Recycler XDurablade Integrated Economizer (includes Hood) X XEconoMi$er X XEconoMi$er with Power Exhaust XPower Exhaust for EconoMi$er XElectric Heat** XManual Outdoor-Air Damper X XControls Upgrade Kit†† X XCondenser Coil Grille XAlternate Drive (008) XAlternate Motor and Drive (004-006, 012,014) XHigh-Static Motor and Drive|| X25% Open Two-Position Damper X100% Open Two-Position Damper XRoof Curbs (Vertical and Horizontal Discharge) XThermostats and Subbases XMotormaster® IV Head Pressure Control (Cycle Control) XTime Guard® II Control Circuit XThru-the-Bottom Service Connections XElectronic Programmable Thermostat XAccusensor™ II Enthalpy Control XCondenser Coil Hail Guard Assembly XFan/Filter Status XOutdoor-Air Enthalpy Sensor (EconoMi$er Only) XReturn-Air Enthalpy Sensor (EconoMi$er Only) XReturn-Air Temperature Sensor (EconoMi$er Only) XIndoor-Air Quality (CO2) Sensor (EconoMi$er Only) X
Options and accessories
ELECTRONIC PROGRAMMABLE THERMOSTAT
Carrier’s electronic programmable thermostat provides efficient tem-perature control by allowing you to program heating and cooling set-backs and set ups with provisions for weekends and holidays.Accessory remote sensing package is also available to providetamperproof control in high traffic spaces. Used in conjunction withfactory-installed Apollo control, this thermostat provides a 5-minuterecycle timer between modes of operation for short-cycle protection.
TIME GUARD II CONTROLTime Guard II Control automatically prevents compressor fromrestarting for at least 5 minutes after a shutdown. Accessory pre-vents short cycling of compressor if thermostat is rapidly changed.Time Guard II device mounts in the control compartment of unit.
HEAD PRESSURE CONTROLThe 50TJ004-014 standard units are designed to operate at outdoortemperatures down to 25 F. With accessory Motormaster control(condenser-fan speed modulation), units can operate at outdoortemperatures down to –20 F. The head pressure controls, whichmount in the condenser section, modulate the condenser-fan motorto maintain correct condensing temperature. Refer to Price Pages orcontact your local Carrier representative for appropriate accessorycombinations necessary for desired outdoor ambient temperatureoperation.
MOTORMASTER IVCONTROL
9
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ELECTRIC HEATER
Electric heaters (and single point kits) are available in awide range of capacities for field installation.
ACCUSENSOR™ II
Accusensor economizer controls help provide efficient, economicaleconomizer operation. Accusensor II solid-state enthalpy controlincludes the logic and one sensor to calculate both dry and wet bulbof the outdoor air to provide an accurate enthalpy reading. It thendecides when to energize the economizer based on this reading.CARRIER COMMERCIAL THERMOSTAT
DURABLADE ECONOMIZER
Exclusive Durablade economizer damper design saves energy whileproviding economical and reliable cooling. A sliding plate on the faceof the economizer controls the amount of outdoor air entering the sys-tem. Closed, it provides a leakproof seal which prevents ambient airfrom seeping in or conditioned air from seeping out. It can be easilyadjusted for 100% outdoor air or any proportions of mixed air. Like thebase unit, the economizer is easily converted for horizontal dischargeapplications.
Carrier’s electronic programmable thermostat provides effi-cient temperature control by allowing you to program heatingand cooling setbacks and setups with provisions for weekendsand holidays.
10
Options and accessories (cont)
CONTROLLER
BAROMETRICRELIEF DAMPERS
OUTDOOR AIRTEMPERATURESENSOR
GEAR-DRIVENDAMPER
ACTUATOR
ECONOMI$ERPLUG
FACTORY-INSTALLED APOLLO COMMUNICATING CONTROLS
The Apollo direct digital controls are designed exclusively byCarrier, and are used to actively monitor and control all modesof operation as well as to monitor evaporator-fan status, filterstatus, supply-air temperature, outdoor-air temperature, andindoor-air quality. They are designed to work in conjunction withCarrier TEMP and VVT® (Variable Volume/Variable Tempera-ture) system thermostats.
ECONOMI$ER
Factory-installed EconoMi$er utilizes a microprocessor-basedcontrol, gear drive damper system, low pressure drop character-istics, built-in spring return (for close upon power loss), and anintegral barometric damper.NOTE: EconoMi$er is only available for vertical ductwork appli-cations and can be field or factory installed.
CONNECTION SIZESA 11/8″ Dia. [28.6] Field Power Supply HoleB 3/4″− 14 NPT Condensate DrainC 13/8″ Dia. [35] Power Supply KnockoutD 2″ Dia. [50.8] Power Supply Knockout
NOTES:1. Dimensions in [ ] are in millimeters.
2. Center of gravity.
3. Direction of airflow.
4. Ductwork to be attached to accessory roof curb only. 5. Minimum clearance (local codes or jurisdiction may prevail):
a. Bottom to combustible surfaces (when not using curb) 0 inches, on horizontal discharge unitswith electric heat 1 in. clearance to ductwork for 1 ft.
b. Condenser coil, for proper airflow, 36 in. one side, 12 in. the other. The side getting the greaterclearance is optional.
c. Overhead, 60 in. to assure proper condenser fan operation.d. Between units, control box side, 42 in. per NEC (National Electrical Code).e. Between unit and ungrounded surfaces, control box side, 36 in. per NEC.f. Between unit and block or concrete walls and other grounded surfaces, control box side, 42 in.
per NEC. g. Horizontal supply and return end, 0 inches.
6. With the exception of the clearance for the condenser coil as stated in Notes 5a, b, and c, a remov-able fence or barricade requires no clearance.
7. Units may be installed on combustible floors made from wood or Class A, B, or C roof coveringmaterial.
8. The vertical center of gravity is 1′-61/2″ [470] up from the bottom of the base rail.
BOTTOM POWER CHART, THESE HOLESREQ’D FOR USE WITH ACCESSORY PACKAGES —
4. Ductwork to be attached to accessory roof curb only. 5. Minimum clearance (local codes or jurisdiction may prevail):
a. Bottom to combustible surfaces (when not using curb) 0 inches, on horizontal discharge units withelectric heat 1 in. clearance to ductwork for 1 ft.
b. Condenser coil, for proper airflow, 36 in. one side, 12 in. the other. The side getting the greaterclearance is optional.
c. Overhead, 60 in. to assure proper condenser fan operation.d. Between units, control box side, 42 in. per NEC (National Electrical Code).e. Between unit and ungrounded surfaces, control box side, 36 in. per NEC.f. Between unit and block or concrete walls and other grounded surfaces, control box side, 42 in. per
NEC. g. Horizontal supply and return end, 0 inches.
6. With the exception of the clearance for the condenser coil as stated in Notes 5a, b, and c, a removablefence or barricade requires no clearance.
7. Units may be installed on combustible floors made from wood or Class A, B, or C roof covering material. 8. The vertical center of gravity is 1′-71/2″ [495] for 008 and 009, 2′-0″ [610] for 012 and 014 up from the
bottom of the base rail.
CONNECTION SIZESA 13/8″ Dia. [35] Field Power Supply HoleB 21/2″ Dia. [64] Power Supply Knock-OutC 13/4″ Dia. [44] Charging Port HoleD 7/8″ Dia. [22] Field Control Wiring HoleE 3/4″ — 14 NPT Condensate DrainF 2″ Dia. [51] Power Supply Knock-Out
BOTTOM POWER CHART, THESE HOLES REQ’D FOR USE WITH ACCESSORY PACKAGES — CRBTMPWR002A00 (1/2″, 11/4″)
THREADEDCONDUIT SIZE WIRE USE REQ’D HOLE SIZES
(Max.)1/2″
11/4″24 V
Power7/8″ [22.2]]
13/4″ [44.4]
13
Accessory dimensions
TO ENSURE AIRTIGHT CONNECTION,PLACE UNIT AS CLOSE TO THISEND AS POSSIBLE
TO ENSURE AIRTIGHT CONNECTION,PLACE UNIT AS CLOSE TO THISEND AS POSSIBLE
NOTES:1. Roof curb accessory is shipped unassembled.2. Insulated panels.3. Dimensions in [ ] are in millimeters.4. Roof curb: 16 gage steel.5. Attach ductwork to curb (flanges of duct rest on curb).6. Service clearance 4 ft on each side.
7. Direction of airflow.
14
Accessory dimensions (cont)
TO ENSURE AIRTIGHT CONNECTION,PLACE UNIT AS CLOSE TOEND AS POSSIBLE
TO ENSURE AIRTIGHT CONNECTION,PLACE UNIT AS CLOSE TOEND AS POSSIBLE
NOTES:1. Roof curb accessory is shipped unassembled.2. Insulated panels.3. Dimensions in [ ] are in millimeters.4. Roof curb: 16 gage steel.5. Attach ductwork to curb (flanges of duct rest on curb).6. Service clearance 4 ft on each side.
7. Direction of airflow.
15
I Determine cooling and heating loads at designconditions.Given:Required Cooling Capacity (TC) . . . . . .67,000 BtuhSensible Heat Capacity (SHC). . . . . . . .46,000 BtuhRequired Heating Capacity . . . . . . . . . .60,000 BtuhOutdoor Entering-Air Temperature db . . . . . . . .95 FOutdoor Entering-Air Temperature wb. . . . . . . .75 FOutdoor-Air Entering Airflow Cfm . . . . . . 450 CfmOutdoor-Air Winter Design Temperature . . . . . . 0° FIndoor-Air Winter Design Temperature . . . . . . .70 FAir to room including outdoor air . . . . . . 2000 CfmExternal Static Pressure . . . . . Supply — 0.60 in. wg
II Determine fan speed and power requirementsat design conditions.Before entering the Fan Performance tables, calculatethe total static pressure required based on unit com-ponent. From the given and the Accessory/FIOPStatic Pressure table of the 50TJ find:External static pressure supply 0.6 in. wgExternal static pressure return 0.2 in. wgAccessory static — None 0.0 in. wgTotal Static 0.8 in. wgEnter the Fan Performance table for verticaldischarge units of the 50TJ006 at 2000 cfm. Thestandard motor will provide 0.92 in. wg ESP at highspeed. Watts is 1144.NOTE: Convert to Fan Heat using the formula below.Indoor Fan Heat = watts x 3.413 Btuh/watt
= 1144 x 3.413= 3904 Btuh
III Select Energy$Recycler based on OutdoorEntering Cfm.Entering the Energy$Recycler Product Data literature,see the Cooling Ratings table in the Capacities sec-tion. At 450 cfm entering outdoor airflow, chooseModel 62AQ060.Using 450 cfm outdoor supply airflow, 95 F OD DB,and 75 F OD WB find performance of the 62AQ060at these conditions:Energy$Recycler Gross Cooling
Capacity is 13,000 BtuhEnergy$Recycler Gross Sensible
Capacity is 10,090 BtuhCompressor power is 1.06 kWEnergy$Recycler Leaving db is 73 FEnergy$Recycler Leaving wb is 66.9 F
IV Using the simplified* method below, calculatethe approximate mixed air temperature for therooftop unit evaporator coil.Using the outdoor-air entering cfm, the room cfm andthe room exhaust airflow with their respective db andwb temperatures, determine the db and wb enteringthe rooftop evaporator coil.
a) Estimate the mixed air db to the evaporator coil.t mix db = ((cfm oa x t oa db) + ((cfm ra – cfm exh)x t ra db)) / ((cfm ao + (cfm ra – cfm exh)))= ((450 cfm x 73.0 F) + ((2000 cfm – 450 cfm)
x 78 F)) / ((450 cfm + (2000 cfm – 450 cfm)))Mixed air into the rooftop evaporator coil = 76.9 F db
b) Estimate the mixed air wb to the evaporator coil.t mix wb* = ((cfm oa x t oa wb) + ((cfm ra – cfmexh ) x tra wb))/ ((cfm oa + (cfm ra – cfm exh)))= ((450 cfm x 66.9 F) + ((2000 cfm – 450 cfm)
x 65 F)) / ((450 cfm + (2000 cfm – 450 cfm)))Mixed air temperature into the rooftop evaporator= 65.40 F wb*Simplified method of determining wet bulb (wb)temperature of mixture. This approximation is usedbecause the wb lines in the area of the psychromet-ric chart in the area used in the calculation is rela-tively linear, providing a close approximation. Amore accurate solution can be found using the E-Catprogram.
LEGEND
V Determine the cooling load requirement for therooftop unit.Customer load is 67,000 BtuhLess TC supplied by the
Energy$Recycler –13,000 BtuhRooftop cooling load required is 54,000 Btuh
VI Select the rooftop unit based on mixed airentering conditions and cooling load.Enter cooling capacity table at outdoor entering tem-perature 95 F, mixed air entering evaporator at2000 cfm, 76.9 F db, and 65.4 F wb. Interpolation isrequired.The 50TJ006 will provide a total gross coolingcapacity of 58,400 Btuh, a sensible cooling of51,400 Btuh, and a kW rating of 5.69.Because these values were not at 80 F entering db,they were calculated based on the notes following theCooling Capacity tables.NOTE: Unit ratings are gross capacities and do notinclude the effect of evaporator-fan motor heat. Tocalculate net capacities see Steps VII and VIII.
VII Select net heating capacity of unit to meetdesign condition requirements.Enter the 62AQ060 Heating rating table at 450 cfm.At 70 F and 0° F find the heating value forthe Energy$Recycler to be 15.2 MBtuh.Rooftop fan heat from Step II 3,904 BtuhEnergy$Recycler Heat Capacity 15,200 Btuhadd Energy$Recycler optional supply fan heat if supplied 0 BtuhTotal Unit heat with Energy$Recycler 19,104 Btuh
cfm — cubic feet per minute of airdb — dry bulbexh — Energy$Recycler dischargemix — mixture of outdoor + return airoa — outside air leaving Energy$Recyclerra — return airsa — supply air at coil (sa = oa + ra – exh)t — temperaturewb — wet bulb
Selection procedure (with 50TJ006 example)
16
The required heating capacity is 60,000 Btuh. Deter-mine additional electric heat capacity in kW. There-fore 40,896 Btuh (60,000 Btuh – 19,104 Btuh) ofadditional heat is required.Determine additional electric heat in kW.(40,896/3413 Btuh/kW) = 11.98 kW of additionalheat is required.Enter Electric Heating Capacities tables on page 51,for the 50TJ006 at 208/230 v, 3 phase. The 16.0kW heater at 240 v most closely satisfies the heatingrequirement. To calculate kW at 230 v use the multi-plication factors table.16.0 x 0.92 = 14.72 kW16.0 x 0.92 x 3413 Btuh/kW = 50,239 BtuhTotal unit net heating capacity is 69,343 (50,239 +19,104) Btuh. The 50TJ006 unit with accessory16.0 kW electric heater is sufficient.
VIII Determine net cooling capacity.Cooling capacities are gross capacities anddo not include indoor (evaporator) or optionalEnergy$Recycler supply fan heat.Determine net cooling capacity using the followingformula:Net Capacity = (Gross Capacity Rooftop Unit +Energy$Recycler) – (Indoor [evaporator] fan motor[IFM] Heat + Optional Energy$Recycler Supply Fanmotor heat)Gross Total Cooling
Rooftop unit 58,400 BtuhEnergy$Recycler 13,000 BtuhTotal 71,400 Btuh
LessIFM heat (from Step II) <3,904> BtuhOpt. Energy$Recycler SupplyFan Motor Heat noneNet Total Capacity 67,496 Btuh
Gross Sensible CoolingRooftop unit 51,400 BtuhEnergy$Recycler 10,090 BtuhTotal 61,490 Btuh
IX Determine the operating watts of the unit.Cooling with Energy$Recycler in operation:a) Rooftop unit:
Using the 48TJ006 cooling capacity table and thecalculations described in Step VI of this procedure,determine:compressor watts 5,690 wattsIndoor fan motor from Step II 1,144 wattsOutdoor fan motor from Physical Data table find1/4 hp†
Assume OD motor efficiency is 0.75.Watts = (746 x hp)/(motor Eff)
= (746 x 1/4)/(0.75)= 249 watts
†Dual circuit units will have two outdoor fans, doublevalues.
b) Energy$Recycler:Compressor watts from 62AQ060Cooling Ratings table 1,060 wattsOptional supply fan fromfan curves none selectedExhaust fan operating watts from62AQ060 Exhaust Fan PerformanceCurve at 230-v, 450 cfm,0.2 in. wg, Static = 110 wattsTotal watts for the unit in operationat design conditions 8,253 watts
X Electrical data RLA, FLA, LRA, MCA andMOCP.Separate Power Supply:If the 62AQ is wired for separate power see the Elec-trical Data table.Single Power Supply with Unit:The unit is 230 v-3-60 Hz, so from the 50TJ Electri-cal Data table, find unit electrical data. For the rooftopunit the data is MCA = 27.7 amps, MOCP =35 amps, Min Unit Disconnect Size FLA = 27, andLRA = 126.For this example follow the steps outlined in theApplication Data section of the Energy$RecyclerProduct Data for single power supply for all rooftopunits except size 014 (230-v) and 62AQ on 460-vpower supply. For other size and voltage conditionsfollow corresponding steps also outlined in theEnergy$Recycler Product Data Application datasection.From the Single Power Supply table (Electrical Data,Energy$Recycler Product Data) find 230 v, for62AQ060300, “X” = 8.1 amps and “Y” = 9.3 amps.Add “X” amps to the MCA and MOCP and add “Y”amps to the minimum disconnect size.
(MOCP calculation is 43.1. Round the value down to40. 40 is greater than the MCA of 35.8, therefore 40is the correct MOCP.)
The wiring to the unit must be suitable for the MCAcalculated above.The overcurrent protective device for the combinationload is equal to 40, thus a single disconnect may beused for BOTH the MAIN UNIT and the 62AQ pro-vided that the wire supplying the 62AQ is sized for aminimum of 33% of the maximum overcurrent pro-tection device value (i.e., 40 x .33 = 14 Amps). Nofurther subfusing is required.In this example a 40-amp disconnect would be usedfor the combined load of the 50TJ006 and the62AQ060 Energy$Recycler unit.
NOTES:1. Direct interpolation is permissible. Do not extrapolate.2. The following formulas may be used:
tlwb = Wet-bulb temperature corresponding to enthalpy of air leaving evapora-tor coil (hlwb )
Where: hewb = Enthalpy of air entering evaporator coil
3. The SHC is based on 80 F edb temperature of air entering evaporator coil.Below 80 F edb, subtract (corr factor x cfm) from SHC.Above 80 F edb, add (corr factor x cfm) to SHC.
Interpolation is permissible.Correction Factor = 1.10 x (1 - BF) x (edb - 80).
50TJ012 (10 TONS)
Temp (F)Air EnteringCondenser
(Edb)
Air Entering Evaporator — Cfm/BF3000/0.095 4000/0.125 5000/0.15
ENTERING AIR DRY-BULB TEMP (F)79 78 77 76 75 under 7581 82 83 84 85 over 85
Correction Factor.05 1.04 2.07 3.11 4.14 5.18
Use formulashown below.
.10 .98 1.96 2.94 3.92 4.90
.20 .87 1.74 2.62 3.49 4.36
.30 .76 1.53 2.29 3.05 3.82
20
FAN PERFORMANCE — VERTICAL DISCHARGE UNITS
LEGEND
NOTES:1. Values include losses for filters, unit casing, and wet coils. See
page 47 for accessory/FIOP static pressure information.
2. Extensive motor and electrical testing on these units ensures thatthe full range of the motor can be utilized with confidence. Usingyour fan motors up to the wattage ratings shown will not result innuisance tripping or premature motor failure. Unit warranty will notbe affected. For additional information on motor performance, referto Evaporator-Fan Motor Performance table on page 50.
3. Use of a field-supplied motor may affect wire sizing. Contact yourCarrier representative for details.
LEGEND
*Motor drive range: 760 to 1000 rpm. All other rpms require field-supplied drive.
NOTES:1. Boldface indicates field-supplied drive is required.
2. indicates field-supplied motor and drive are required.
3. Maximum usable watts input is 1000 and maximum continuousbhp is 1.00. Extensive motor and electrical testing on these unitsensures that the full range of the motor can be utilized with confi-dence. Using your fan motors up to the wattage ratings shown willnot result in nuisance tripping or premature motor failure. Unit war-ranty will not be affected. For additional information on motor per-formance, refer to Evaporator-Fan Motor Performance table onpage 50.
4. Values include losses for filters, unit casing, and wet coils. Seepage 47 for accessory/FIOP static pressure information.
5. Use of a field-supplied motor may affect wire sizing. Contact yourCarrier representative for details.
6. Interpolation is permissible. Do not extrapolate.
50TJ004 (3 TONS) — STANDARD MOTOR (DIRECT DRIVE)
Airflow(Cfm)
Low Speed High Speed208 v 230, 460, 575 v 208 v 230, 460, 575 v
Bhp — Brake Horsepower Input to FanFIOP — Factory-Installed OptionWatts — Input Watts to Motor
Performance data (cont)
21
FAN PERFORMANCE — VERTICAL DISCHARGE UNITS (cont)
LEGEND
*Motor drive range: 1075 to 1455 rpm. All other rpms require field-supplied drive.
NOTES:1. Boldface indicates field-supplied drive is required.2. Values include losses for filters, unit casings, and wet coils. See
page 47 for accessory/FIOP static pressure information.
3. Maximum continuous bhp is 2.4, and the maximum continuouswatts are 2120. Extensive motor and electrical testing on theseunits ensures that the full range of the motor can be utilized withconfidence. Using your fan motors up to the wattage ratings shownwill not result in nuisance tripping or premature motor failure. Unitwarranty will not be affected. See Evaporator-Fan Motor Perfor-mance table on page 50 for additional information.
4. Use of a field-supplied motor may affect wire sizing. Contact yourCarrier representative for details.
5. Interpolation is permissible. Do not extrapolate.
LEGEND
NOTES:1. Values include losses for filters, unit casing, and wet coils. See
page 47 for accessory/FIOP static pressure information.
2. Extensive motor and electrical testing on these units ensures thatthe full range of the motor can be utilized with confidence. Usingyour fan motors up to the wattage ratings shown will not result innuisance tripping or premature motor failure. Unit warranty will notbe affected. For additional information on motor performance, referto Evaporator-Fan Motor Performance table on page 50.
3. Use of a field-supplied motor may affect wire sizing. Contact yourCarrier representative for details.
50TJ004 (3 TONS) — HIGH-STATIC MOTOR (BELT DRIVE)*
Bhp — Brake Horsepower Input to FanESP — External Static Pressure (in. wg)FIOP — Factory-Installed OptionWatts — Input Watts to Motor
22
FAN PERFORMANCE — VERTICAL DISCHARGE UNITS (cont)
LEGEND
*Motor drive range: 835 to 1185 rpm. All other rpms require field-supplied drive.NOTES:
1. Boldface indicates field-supplied motor drive is required.2. indicates field-supplied motor and drive are required.
3. Maximum usable watts input is 1000 and maximum continuousbhp is 1.00. Extensive motor and electrical testing on these unitsensures that the full range of the motor can be utilized with confi-dence. Using your fan motors up to the wattage ratings shown willnot result in nuisance tripping or premature motor failure. Unit war-ranty will not be affected. For additional information on motor per-formance, refer to Evaporator-Fan Motor Performance table onpage 50.
4. Values include losses for filters, unit casing, and wet coils. Seepage 47 for accessory/FIOP static pressure information.
5. Use of a field-supplied motor may affect wire sizing. Contact yourCarrier representative for details.
6. Interpolation is permissible. Do not extrapolate.
Bhp — Brake Horsepower Input to FanFIOP — Factory-Installed OptionWatts — Input Watts to Motor
Performance data (cont)
23
FAN PERFORMANCE — VERTICAL DISCHARGE UNITS (cont)
LEGEND
*Motor drive range: 1075 to 1455 rpm. All other rpms require field-supplied drive.
NOTES:1. Boldface indicates field-supplied drive is required.2. Values include losses for filters, unit casings, and wet coils. See
page 47 for accessory/FIOP static pressure information.
3. Maximum continuous bhp is 2.4 and the maximum continuouswatts are 2120. Extensive motor and electrical testing on theseunits ensures that the full range of the motor can be utilized withconfidence. Using your fan motors up to the wattage ratings shownwill not result in nuisance tripping or premature motor failure. Unitwarranty will not be affected. See Evaporator-Fan Motor Perfor-mance table on page 50 for additional information.
4. Use of a field-supplied motor may affect wire sizing. Contact yourCarrier representative for details.
5. Interpolation is permissible. Do not extrapolate.
LEGEND
NOTES:1. Values include losses for filters, unit casing, and wet coils. See
page 47 for accessory/FIOP static pressure information.
2. Extensive motor and electrical testing on these units ensures thatthe full range of the motor can be utilized with confidence. Usingyour fan motors up to the wattage ratings shown will not result innuisance tripping or premature motor failure. Unit warranty will notbe affected. For additional information on motor performance, referto Evaporator-Fan Motor Performance table on page 50.
3. Use of a field-supplied motor may affect wire sizing. Contact yourCarrier representative for details.
50TJ005 (4 TONS) — HIGH-STATIC MOTOR (BELT DRIVE)*
Bhp — Brake Horsepower Input to FanESP — External Static Pressure (in. wg)FIOP — Factory-Installed OptionWatts — Input Watts to Motor
24
FAN PERFORMANCE — VERTICAL DISCHARGE UNITS (cont)
LEGEND
*Motor drive range: 900 to 1300 rpm. All other rpms require field-supplied drive.
NOTES:1. Boldface indicates field-supplied drive is required.2. indicates field-supplied motor and drive are required.
3. Maximum usable watts input is 2120 and maximum continuousbhp is 1.30 for single-phase units and 2.40 for 3-phase units.Extensive motor and electrical testing on these units ensures thatthe full range of the motor can be utilized with confidence. Usingyour fan motors up to the wattage ratings shown will not result innuisance tripping or premature motor failure. Unit warranty will notbe affected. For additional information on motor performance, referto Evaporator-Fan Motor Performance table on page 50.
4. Values include losses for filters, unit casing, and wet coils. Seepage 47 for accessory/FIOP static pressure information.
5. Use of a field-supplied motor may affect wire sizing. Contact yourCarrier representative for details.
6. Interpolation is permissible. Do not extrapolate.
Bhp — Brake Horsepower Input to FanFIOP — Factory-Installed OptionWatts — Input Watts to Motor
Performance data (cont)
25
FAN PERFORMANCE — VERTICAL DISCHARGE UNITS (cont)
LEGEND
*Motor drive range: 1300 to 1685 rpm. All other rpms require field-supplied drive.
NOTES:1. Boldface indicates field-supplied drive is required.2. indicates field-supplied motor and drive are required.3. Values include losses for filters, unit casings, and wet coils. See
page 47 for accessory/FIOP static pressure information.
4. Maximum continuous bhp is 2.9 and the maximum continuouswatts are 2562. Extensive motor and electrical testing on theseunits ensures that the full range of the motor can be utilized withconfidence. Using your fan motors up to the wattage ratings shownwill not result in nuisance tripping or premature motor failure. Unitwarranty will not be affected. See Evaporator-Fan Motor Perfor-mance table on page 50 for additional information.
5. Use of a field-supplied motor may affect wire sizing. Contact yourCarrier representative for details.
6. Interpolation is permissible. Do not extrapolate.
50TJ006 (5 TONS) — HIGH-STATIC MOTOR (BELT DRIVE)*
Bhp — Brake Horsepower Input to FanFIOP — Factory-Installed OptionWatts — Input Watts to Motor
26
FAN PERFORMANCE — VERTICAL DISCHARGE UNITS (cont)
LEGEND
*Motor drive range: 1070 to 1460 rpm. All other rpms require field-supplied drive.
NOTES:1. Boldface indicates field-supplied drive is required.
2. indicates field-supplied motor and drive are required.
3. Maximum usable watts input is 2120 and maximum continuousbhp is 2.40. Extensive motor and electrical testing on these unitsensures that the full range of the motor can be utilized with confi-dence. Using your fan motors up to the wattage ratings shown willnot result in nuisance tripping or premature motor failure. Unit war-ranty will not be affected. For additional information on motor per-formance, refer to Evaporator-Fan Motor Performance table onpage 50.
4. Values include losses for filters, unit casing, and wet coils. Seepage 47 for accessory/FIOP static pressure information.
5. Use of a field-supplied motor may affect wire sizing. Contact yourCarrier representative for details.
6. Interpolation is permissible. Do not extrapolate.
Bhp — Brake Horsepower Input to FanFIOP — Factory-Installed OptionWatts — Input Watts to Motor
Performance data (cont)
27
FAN PERFORMANCE — VERTICAL DISCHARGE UNITS (cont)
LEGEND
*Motor drive range: 1300 to 1685 rpm. All other rpms require field-supplied drive.
NOTES:1. Boldface indicates field-supplied drive is required.2. indicates field-supplied motor and drive are required.3. Values include losses for filters, unit casings, and wet coils. See
page 47 for accessory/FIOP static pressure information.
4. Maximum continuous bhp is 2.9 and the maximum continuouswatts are 2562. Extensive motor and electrical testing on theseunits ensures that the full range of the motor can be utilized withconfidence. Using your fan motors up to the wattage ratings shownwill not result in nuisance tripping or premature motor failure. Unitwarranty will not be affected. See Evaporator-Fan Motor Perfor-mance table on page 50 for additional information.
5. Use of a field-supplied motor may affect wire sizing. Contact yourCarrier representative for details.
6. Interpolation is permissible. Do not extrapolate.
50TJ007 (6 TONS) — HIGH-STATIC MOTOR (BELT DRIVE)*
Bhp — Brake Horsepower Input to FanFIOP — Factory-Installed OptionWatts — Input Watts to Motor
28
FAN PERFORMANCE — VERTICAL DISCHARGE UNITS (cont)
LEGEND
*Standard motor drive range: 590 to 840 rpm. Alternate motor driverange: 685 to 935 rpm. All other rpms require field-supplied drive.
NOTES:1. Boldface indicates field-supplied drive is required.
2. indicates field-supplied motor and drive are required.
3. Maximum usable watts input is 2120 and maximum continuousbhp is 2.40. Extensive motor and electrical testing on these unitsensures that the full range of the motor can be utilized with confi-dence. Using your fan motors up to the wattage ratings shown willnot result in nuisance tripping or premature motor failure. Unit war-ranty will not be affected. For additional information on motor per-formance refer to Evaporator-Fan Motor Performance table onpage 50.
4. Values include losses for filters, unit casing, and wet coils. Seepage 47 for accessory/FIOP static pressure information.
5. Use of a field-supplied motor may affect wire sizing. Contact yourCarrier representative for details.
6. Interpolation is permissible. Do not extrapolate.
50TJ008 (71/2 TONS)* — STANDARD MOTOR AND DRIVE AND ALTERNATE DRIVE (BELT DRIVE)
Bhp — Brake Horsepower Input to FanFIOP — Factory-Installed OptionWatts — Input Watts to Motor
Performance data (cont)
29
FAN PERFORMANCE — VERTICAL DISCHARGE UNITS (cont)
LEGEND
*Motor drive range: 860 to 1080 rpm. All other rpms require field-supplied drive.
NOTES:1. Boldface indicates field-supplied drive is required.2. indicates field-supplied motor and drive are required.3. Values include losses for filters, unit casings, and wet coils. See
page 47 for accessory/FIOP static pressure information.
4. Maximum continuous bhp is 3.7 and the maximum continuouswatts are 3313. Extensive motor and electrical testing on theseunits ensures that the full range of the motor can be utilized withconfidence. Using your fan motors up to the wattage ratings shownwill not result in nuisance tripping or premature motor failure. Unitwarranty will not be affected. See Evaporator-Fan Motor Perfor-mance table on page 50 for additional information.
5. Use of a field-supplied motor may affect wire sizing. Contact yourCarrier representative for details.
6. Interpolation is permissible. Do not extrapolate.
50TJ008 (71/2 TONS) — HIGH-STATIC MOTOR (BELT DRIVE)*
Bhp — Brake Horsepower Input to FanFIOP — Factory-Installed OptionWatts — Input Watts to Motor
30
FAN PERFORMANCE — VERTICAL DISCHARGE UNITS (cont)
LEGEND
*Motor drive range: 685 to 935 rpm. All other rpms require field-supplied drive.
NOTES:1. Boldface indicates field-supplied drive is required.
2. indicates field-supplied motor and drive are required.
3. Maximum usable watts input is 2120 and maximum continuousbhp is 2.40. Extensive motor and electrical testing on these unitsensures that the full range of the motor can be utilized with confi-dence. Using your fan motors up to the wattage ratings shown willnot result in nuisance tripping or premature motor failure. Unit war-ranty will not be affected. For additional information on motor per-formance refer to Evaporator-Fan Motor Performance table onpage 50.
4. Values include losses for filters, unit casing, and wet coils. Seepage 47 for accessory/FIOP static pressure information.
5. Use of a field-supplied motor may affect wire sizing. Contact yourCarrier representative to verify.
6. Interpolation is permissible. Do not extrapolate.
Bhp — Brake Horsepower Input to FanFIOP — Factory-Installed OptionWatts — Input Watts to Motor
Performance data (cont)
31
FAN PERFORMANCE — VERTICAL DISCHARGE UNITS (cont)
LEGEND
*Motor drive range: 860 to 1080 rpm. All other rpms require field-supplied drive.
NOTES:1. Boldface indicates field-supplied drive is required.2. indicates field-supplied motor and drive are required.3. Values include losses for filters, unit casings, and wet coils. See
page 47 for accessory/FIOP static pressure information.
4. Maximum continuous bhp is 3.7 and the maximum continuouswatts are 3313. Extensive motor and electrical testing on theseunits ensures that the full range of the motor can be utilized withconfidence. Using your fan motors up to the wattage ratings shownwill not result in nuisance tripping or premature motor failure. Unitwarranty will not be affected. See Evaporator-Fan Motor Perfor-mance table on page 50 for additional information.
5. Use of a field-supplied motor may affect wire sizing. Contact yourCarrier representative for details.
6. Interpolation is permissible. Do not extrapolate.
50TJ009 (81/2 TONS) — HIGH-STATIC MOTOR (BELT DRIVE)*
Bhp — Brake Horsepower Input to FanFIOP — Factory-Installed OptionWatts — Input Watts to Motor
32
FAN PERFORMANCE — VERTICAL DISCHARGE UNITS (cont)
LEGEND
*Standard motor drive range: 685 to 935 rpm. Alternate motor driverange: 835 to 1085 rpm. High-static motor drive range is 830 to1130 rpm. All other rpms require field-supplied drive.
NOTES:1. Boldface indicates high-static motor and drive are required.2. Maximum usable watts input is 2120 with standard motor,
2615 with alternate motor, and 4400 for the high-static motor. Max-imum continuous bhp is 2.40 with standard motor, 2.90 with alter-nate motor, and 5.25 for the high-static motor. Extensive motor and
electrical testing on these units ensures that the full range of themotor can be utilized with confidence. Using your fan motors up tothe wattage ratings shown will not result in nuisance tripping orpremature motor failure. Unit warranty will not be affected. Foradditional information on motor performance, refer to Evaporator-Fan Motor Performance table on page 50.
3. Values include losses for filters, unit casings, and wet coils. Seepage 47 for accessory/FIOP static pressure information.
4. Use of a field-supplied motor may affect wire sizing. Contact yourCarrier representative for details.
5. Interpolation is permissible. Do not extrapolate.
Bhp — Brake Horsepower Input to FanFIOP — Factory-Installed OptionWatts — Input Watts to Motor
Performance data (cont)
33
FAN PERFORMANCE — VERTICAL DISCHARGE UNITS (cont)
LEGEND
*Standard motor drive range: 860 to 1080 rpm. Alternate motor driverange: 900 to 1260 rpm. All other rpms require field-supplied drive.
NOTES:1. Boldface indicates alternate motor and drive are required.2. Maximum usable watts input is 3313 with standard motor and
4400 with alternate motor. Maximum continuous bhp is 3.70 withstandard motor and 5.25 with alternate motor. Extensive motorand electrical testing on these units ensures that the full range of
the motor can be utilized with confidence. Using your fan motorsup to the wattage ratings shown will not result in nuisance trippingor premature motor failure. Unit warranty will not be affected. Foradditional information on motor performance, refer to Evaporator-Fan Motor Performance table on page 50.
3. Values include losses for filters, unit casings, and wet coils. Seepage 47 for accessory/FIOP static pressure information.
4. Use of a field-supplied motor may affect wire sizing. Contact yourCarrier representative for details.
5. Interpolation is permissible. Do not extrapolate.
Bhp — Brake Horsepower Input to FanFIOP — Factory-Installed OptionWatts — Input Watts to Motor
34
FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS
LEGEND
NOTES:1. Values include losses for filters, unit casing, and wet coils. See
page 47 for accessory/FIOP static pressure information.
2. Extensive motor and electrical testing on these units ensures thatthe full range of the motor can be utilized with confidence. Usingyour fan motors up to the wattage ratings shown will not result innuisance tripping or premature motor failure. Unit warranty will notbe affected. For additional information on motor performance, referto Evaporator-Fan Motor Performance table on page 50.
3. Use of a field-supplied motor may affect wire sizing. Contact yourCarrier representative for details.
LEGEND
*Motor drive range: 760 to 1000 rpm. All other rpms require field-supplied drive.
NOTES:1. Boldface indicates field-supplied drive is required.2. Maximum usable watts input is 1000 and maximum continuous bhp
is 1.00. Extensive motor and electrical testing on these units
ensures that the full range of the motor can be utilized with confi-dence. Using your fan motors up to the wattage ratings shown willnot result in nuisance tripping or premature motor failure. Unitwarranty will not be affected. For additional information on motorperformance, refer to Evaporator-Fan Motor Performance table onpage 50.
3. Values include losses for filters, unit casing, and wet coils. Seepage 47 for accessory/FIOP static pressure information.
4. Interpolation is permissible. Do not extrapolate.5. Use of a field-supplied motor may affect wire sizing. Contact your
Carrier representative for details.
50TJ004 (3 TONS) — STANDARD MOTOR (DIRECT DRIVE)
Airflow(Cfm)
Low Speed High Speed208 v 230, 460, 575 v 208 v 230, 460, 575 v
Bhp — Brake Horsepower Input to FanFIOP — Factory-Installed OptionWatts — Input Watts to Motor
Performance data (cont)
35
FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS (cont)
LEGEND
*Motor drive range: 1075 to 1455 rpm. All other rpms require field-supplied drive.
NOTES:1. Boldface indicates field-supplied drive is required.2. Values include losses for filters, unit casing, and wet coils. See
page 47 for accessory/FIOP static pressure information.
3. Maximum continuous bhp is 2.4 and the maximum continuous wattsare 2120. Extensive motor and electrical testing on these unitsensures that the full range of the motor can be utilized with confi-dence. Using your fan motors up to the wattage ratings shown willnot result in nuisance tripping or premature motor failure. Unit war-ranty will not be affected. See Evaporator-Fan Motor Performancetable on page 50 for additional information.
4. Use of a field-supplied motor may affect wire sizing. Contact yourCarrier representative for details.
5. Interpolation is permissible. Do not extrapolate.
LEGEND
NOTES:1. Values include losses for filters, unit casing, and wet coils. See
page 47 for accessory/FIOP static pressure information.
2. Extensive motor and electrical testing on these units ensures thatthe full range of the motor can be utilized with confidence. Usingyour fan motors up to the wattage ratings shown will not result innuisance tripping or premature motor failure. Unit warranty will notbe affected. For additional information on motor performance, referto Evaporator-Fan Motor Performance table on page 50.
3. Use of a field-supplied motor may affect wire sizing. Contact yourCarrier representative for details.
50TJ004 (3 TONS) — HIGH-STATIC MOTOR (BELT DRIVE)*
Bhp — Brake Horsepower Input to FanESP — External Static Pressure (in. wg)FIOP — Factory-Installed OptionWatts — Input Watts to Motor
36
FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS (cont)
LEGEND
*Motor drive range: 835 to 1185 rpm. All other rpms require field-supplied drive.NOTES:1. Boldface indicates field-supplied drive is required.2. indicates field-supplied motor and drive are required.3. Maximum usable watts input is 1000 and maximum continuous bhp is 1.00.
Extensive motor and electrical testing on these units ensures that the full
range of the motor can be utilized with confidence. Using your fan motors upto the wattage ratings shown will not result in nuisance tripping or prematuremotor failure. Unit warranty will not be affected. For additional information onmotor performance, refer to Evaporator-Fan Motor Performance table onpage 50.
4. Values include losses for filters, unit casing, and wet coils. See page 47 foraccessory/FIOP static pressure information.
5. Interpolation is permissible. Do not extrapolate.6. Use of a field-supplied motor may affect wire sizing. Contact your Carrier rep-
resentative for details.
LEGEND
*Motor drive range: 1075 to 1455 rpm. All other rpms require field-supplied drive.NOTES:1. Boldface indicates field-supplied drive is required.2. Values include losses for filters, unit casing, and wet coils. See page 47 for
accessory/FIOP static pressure information.
3. Maximum continuous bhp is 2.4 and the maximum continuous watts are 2120.Extensive motor and electrical testing on these units ensures that the fullrange of the motor can be utilized with confidence. Using your fan motors upto the wattage ratings shown will not result in nuisance tripping or prematuremotor failure. Unit warranty will not be affected. See Evaporator-Fan MotorPerformance table on page 58 for additional information.
4. Interpolation is permissible. Do not extrapolate.5. Use of a field-supplied motor may affect wire sizing. Contact your Carrier rep-
Bhp — Brake Horsepower Input to FanFIOP — Factory-Installed OptionWatts — Input Watts to Motor
Performance data (cont)
37
FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS (cont)
LEGEND
NOTES:1. Values include losses for filters, unit casing, and wet coils. See
page 47 for accessory/FIOP static pressure information.
2. Extensive motor and electrical testing on these units ensures thatthe full range of the motor can be utilized with confidence. Usingyour fan motors up to the wattage ratings shown will not result innuisance tripping or premature motor failure. Unit warranty will notbe affected. For additional information on motor performance, referto Evaporator-Fan Motor Performance table on page 50.
3. Use of a field-supplied motor may affect wire sizing. Contact yourCarrier representative for details.
LEGEND
*Motor drive range: 900 to 1300 rpm. All other rpms require field-supplied drive.
NOTES:1. Boldface indicates field-supplied drive is required.2. indicates field-supplied motor and drive are required.
3. Maximum usable watts input is 2120 and maximum continuous bhpis 1.30 for single-phase units and 2.40 for 3-phase units. Extensivemotor and electrical testing on these units ensures that the fullrange of the motor can be utilized with confidence. Using your fanmotors up to the wattage ratings shown will not result in nuisancetripping or premature motor failure. Unit warranty will not beaffected. For additional information on motor performance, refer toEvaporator-Fan Motor Performance table on page 50.
4. Values include losses for filters, unit casing, and wet coils. Seepage 47 for accessory/FIOP static pressure information.
5. Use of a field-supplied motor may affect wire sizing. Contact yourCarrier representative for details.
6. Interpolation is permissible. Do not extrapolate.
50TJ006 (5 TONS) — STANDARD MOTOR (DIRECT DRIVE)
Airflow(Cfm)
Low Speed Medium Speed High Speed208 v 230, 460, 575 v 208 v 230, 460, 575 v 208 v 230, 460, 575 v
Bhp — Brake Horsepower Input to FanFIOP — Factory-Installed OptionWatts — Input Watts to Motor
38
FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS (cont)
LEGEND
*Motor drive range: 1300 to 1685 rpm. All other rpms require field-supplied drive.
NOTES:1. Boldface indicates field-supplied drive is required.2. indicates field-supplied motor and drive are required.3. Values include losses for filters, unit casing, and wet coils. See
page 47 for accessory/FIOP static pressure information.
4. Maximum continuous bhp is 2.9 and the maximum continuous wattsare 2562. Extensive motor and electrical testing on these unitsensures that the full range of the motor can be utilized with confi-dence. Using your fan motors up to the wattage ratings shown willnot result in nuisance tripping or premature motor failure. Unit war-ranty will not be affected. See Evaporator-Fan Motor Performancetable on page 50 for additional information.
5. Use of a field-supplied motor may affect wire sizing. Contact yourCarrier representative for details.
6. Interpolation is permissible. Do not extrapolate.
50TJ006 (5 TONS) — HIGH-STATIC MOTOR (BELT DRIVE)*
Bhp — Brake Horsepower Input to FanFIOP — Factory-Installed OptionWatts — Input Watts to Motor
Performance data (cont)
39
FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS (cont)
LEGEND
*Motor drive range: 1070 to 1460 rpm. All other rpms require field-supplied drive.
NOTES:1. Boldface indicates field-supplied drive is required.2. indicates field-supplied motor and drive are required.
3. Maximum usable watts input is 2120 and maximum continuous bhpis 2.40. Extensive motor and electrical testing on these unitsensures that the full range of the motor can be utilized with confi-dence. Using your fan motors up to the wattage ratings shown willnot result in nuisance tripping or premature motor failure. Unit war-ranty will not be affected. For additional information on motor perfor-mance, refer to Evaporator-Fan Motor Performance table onpage 50.
4. Values include losses for filters, unit casing, and wet coils. Seepage 47 for accessory/FIOP static pressure information.
5. Use of a field-supplied motor may affect wire sizing. Contact yourCarrier representative for details.
6. Interpolation is permissible. Do not extrapolate.
Bhp — Brake Horsepower Input to FanFIOP — Factory-Installed OptionWatts — Input Watts to Motor
40
FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS (cont))
LEGEND
*Motor drive range: 1300 to 1685 rpm. All other rpms require field-supplied drive.
NOTES:1. Boldface indicates field-supplied drive is required.2. indicates field-supplied motor and drive are required.
3. Values include losses for filters, unit casing, and wet coils. Seepage 47 for accessory/FIOP static pressure information.
4. Maximum continuous bhp is 2.9 and the maximum continuous wattsare 2562. Extensive motor and electrical testing on these unitsensures that the full range of the motor can be utilized with confi-dence. Using your fan motors up to the wattage ratings shown willnot result in nuisance tripping or premature motor failure. Unit war-ranty will not be affected. See Evaporator-Fan Motor Performancetable on page 50 for additional information.
5. Use of a field-supplied motor may affect wire sizing. Contact yourCarrier representative for details.
6. Interpolation is permissible. Do not extrapolate.
50TJ007 (6 TONS) — HIGH-STATIC MOTOR (BELT DRIVE)*
Bhp — Brake Horsepower Input to FanFIOP — Factory-Installed OptionWatts — Input Watts to Motor
Performance data (cont)
41
FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS (cont)
LEGEND
*Motor drive range: 590 to 840 rpm. Alternate motor drive range: 685 to935 rpm. All other rpms require field-supplied drive.
NOTES:1. Boldface indicates field-supplied drive is required.2. indicates high-static motor and drive are required.
3. Maximum usable watts input is 2120 and maximum continuous bhpis 2.40. Extensive motor and electrical testing on these unitsensures that the full range of the motor can be utilized with confi-dence. Using your fan motors up to the wattage ratings shown willnot result in nuisance tripping or premature motor failure. Unit war-ranty will not be affected. For additional information on motor perfor-mance, refer to Evaporator-Fan Motor Performance on page 50.
4. Values include losses for filters, unit casing, and wet coils. Seepage 47 for accessory/FIOP static pressure information.
5. Use of a field-supplied motor may affect wire sizing. Contact yourCarrier representative for details.
6. Interpolation is permissible. Do not extrapolate.
50TJ008 (71/2 TONS) — STANDARD MOTOR AND DRIVE AND ALTERNATE DRIVE (BELT DRIVE)*
Bhp — Brake Horsepower Input to FanFIOP — Factory-Installed OptionWatts — Input Watts to Motor
42
FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS (cont)
LEGEND
*Motor drive range: 860 to 1080 rpm. All other rpms require field-supplied drive.
NOTES:1. Boldface indicates field-supplied drive is required.2. indicates field-supplied motor and drive are required.
3. Values include losses for filters, unit casing, and wet coils. Seepage 47 for accessory/FIOP static pressure information.
4. Maximum continuous bhp is 3.7 and the maximum continuous wattsare 3313. Extensive motor and electrical testing on these unitsensures that the full range of the motor can be utilized with confi-dence. Using your fan motors up to the wattage ratings shown willnot result in nuisance tripping or premature motor failure. Unit war-ranty will not be affected. See Evaporator-Fan Motor Performancetable on page 50 for additional information.
5. Use of a field-supplied motor may affect wire sizing. Contact yourCarrier representative for details.
6. Interpolation is permissible. Do not extrapolate.
50TJ008 (71/2 TONS) — HIGH-STATIC MOTOR (BELT DRIVE)*
Bhp — Brake Horsepower Input to FanFIOP — Factory-Installed OptionWatts — Input Watts to Motor
Performance data (cont)
43
FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS (cont)
LEGEND
*Motor drive range: 685 to 935 rpm. All other rpms require field-supplied drive.
NOTES:1. Boldface indicates field-supplied drive is required.2. indicates field-supplied motor and drive are required.
3. Maximum usable watts input is 2120 and maximum continuous bhpis 2.40. Extensive motor and electrical testing on these unitsensures that the full range of the motor can be utilized with confi-dence. Using your fan motors up to the wattage ratings shown willnot result in nuisance tripping or premature motor failure. Unit war-ranty will not be affected. For additional information on motor perfor-mance, refer to Evaporator-Fan Motor Performance table onpage 50.
4. Values include losses for filters, unit casing, and wet coils. Seepage 47 for accessory/FIOP static pressure information.
5. Use of a field-supplied motor may affect wire sizing. Contact yourCarrier representative for details.
6. Interpolation is permissible. Do not extrapolate.
50TJ009 (81/2 TONS) — STANDARD MOTOR (BELT DRIVE)*
Bhp — Brake Horsepower Input to FanFIOP — Factory-Installed OptionWatts — Input Watts to Motor
44
FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS (cont)
LEGEND
*Motor drive range: 860 to 1080 rpm. All other rpms require field-supplied drive.
NOTES:1. Boldface indicates field-supplied drive is required.2. indicates field-supplied motor and drive are required.
3. Values include losses for filters, unit casing, and wet coils. Seepage 47 for accessory/FIOP static pressure information.
4. Maximum continuous bhp is 3.7 and the maximum continuous wattsare 3313. Extensive motor and electrical testing on these unitsensures that the full range of the motor can be utilized with confi-dence. Using your fan motors up to the wattage ratings shown willnot result in nuisance tripping or premature motor failure. Unit war-ranty will not be affected. See Evaporator-Fan Motor Performancetable on page 50 for additional information.
5. Use of a field-supplied motor may affect wire sizing. Contact yourCarrier representative for details.
6. Interpolation is permissible. Do not extrapolate.
50TJ009 (81/2 TONS) — HIGH-STATIC MOTOR (BELT DRIVE)*
Bhp — Brake Horsepower Input to FanFIOP — Factory-Installed OptionWatts — Input Watts to Motor
Performance data (cont)
45
FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS (cont)
LEGEND
*Standard motor drive range: 685 to 935 rpm. Alternate motor driverange: 835 to 1085 rpm. High static motor drive range: 830 to1130 rpm. All other rpms require field-supplied drive.
NOTES:1. Boldface indicates field-supplied drive is required.2. indicates high-static motor and drive are required.
3. Maximum usable watts input is 2120 with standard motor, 2615 withalternate motor, and 4400 for the high-static motor. Extensive motorand electrical testing on these units ensures that the full range ofthe motor can be utilized with confidence. Using your fan motors upto the wattage ratings shown will not result in nuisance tripping orpremature motor failure. Unit warranty will not be affected.
4. Values include losses for filters, unit casing, and wet coils. Seepage 47 for accessory/FIOP static pressure information.
5. Use of a field-supplied motor may affect wire sizing. Contact yourCarrier representative for details. For additional information onmotor performance, refer to Evaporator-Fan Motor Performancetable on page 50.
6. Interpolation is permissible. Do not extrapolate.
Bhp — Brake Horsepower Input to FanFIOP — Factory-Installed OptionWatts — Input Watts to Motor
46
FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS (cont)
LEGEND
*Standard motor drive range: 860 to 1080 rpm. Alternate motor drive range:900 to 1260 rpm. All other rpms require field-supplied drive.
NOTES:1. Boldface indicates field-supplied drive is required.2. indicates alternate motor and drive are required.
3. Maximum usable watts input is 3313 with standard motor and 4400 withalternate motor. Maximum continuous bhp is 3.70 with standard motorand 5.25 with alternate motor. Extensive motor and electrical testing onthese units ensures that the full range of the motor can be utilized withconfidence. Using your fan motors up to the wattage ratings shown willnot result in nuisance tripping or premature motor failure. Unit warrantywill not be affected.
4. Values include losses for filters, unit casing, and wet coils. See page 47for accessory/FIOP static pressure information.
5. Use of a field-supplied motor may affect wire sizing. Contact your Carrierrepresentative for details. For additional information on motor perfor-mance, refer to Evaporator-Fan Motor Performance table on page 50.
6. Interpolation is permissible. Do not extrapolate.
*The static pressure must be added to external static pressure. The sum and the evaporatorentering-air cfm should then be used in conjunction with the Fan Performance tables to deter-mine blower rpm and watts.
*The static pressure must be added to external static pressure. The sum and the evaporatorentering-air cfm should then be used in conjunction with the Fan Performance tables to deter-mine blower rpm and watts.
FAN RPM AT MOTOR PULLEY SETTINGS*
*Approximate fan rpm shown.†Indicates alternate motor and drive package.**Indicates high-static motor and drive package.
††Indicates standard motor and drive package.||Indicates alternate drive package only.
*Single-phase/three-phase.NOTE: All indoor fan motors 5 Hp and larger meet the minimum effi-ciency requirements as established by the Energy Policy Act of 1992(EPACT) effective October 24, 1997.
STATIC PRESSURE (in. wg)3 TO 6 TON7 1/2 TO 12 1/2 TON
0.25
0.20
0.15
0.10
0.05
0.000 500 1000 1500 2000
FLOW (CFM)
STA
TIC
PR
ES
SU
RE
(in
. wg)
3 TO 6 TON7 1/2 TO 12 1/2 TON
ECONOMI$ER OUTDOOR-AIR LEAKAGE
ECONOMI$ER BAROMETRIC FLOW
0.25
0.20
0.15
0.10
0.05
0.001200 2000 2800 3600 4400
FLOW (CFM)
STA
TIC
PR
ES
SU
RE
(in
. wg)
3 TO 6 TON7 1/2 TO 12 1/2 TON
0.35
0.30
ECONOMI$ER RETURN-AIR PRESSURE DROP
50
EVAPORATOR-FAN MOTOR PERFORMANCE
LEGENDBhp — Brake Horsepower*Extensive motor and electrical testing on these units ensures that the full horse-power range of the motors can be utilized with confidence. Using your fanmotors up to the horsepower ratings shown in this table will not result in nui-sance tripping or premature motor failure. Unit warranty will not be affected.
†Single-phase/three-phase.
NOTES:1. All indoor-fan motors 5 hp and larger meet the minimum efficiency require-
ments as established by the Energy Policy Act of 1992 (EPACT) effectiveOctober 24, 1997.
2. High-static motor not available on single-phase units.
UNIT50TJ
EVAPORATOR-FANMOTOR
UNITVOLTAGE
MAXIMUM ACCEPTABLECONTINUOUS BHP*
MAXIMUM ACCEPTABLEOPERATING WATTS
MAXIMUMAMP DRAW
004
Standard208/230
0.34 4402.8
460 1.3575 1.3
Alternate208/230
1.00 10004.9
460 2.1575 2.1
High Static208/230
2.40 21206.0
460 3.0575 3.0
005
Standard208/230
0.75 8503.5
460 1.8575 1.8
Alternate208/230
1.00 10004.9
460 2.1575 2.1
High Static208/230
2.40 21206.0
460 3.0575 3.0
006
Standard208/230
1.20 13405.9
460 3.2575 3.2
Alternate208/230
1.30/2.40† 21208.8/5.8†
460 2.6575 2.6
High Static208/230
2.90 25628.6
460 3.9575 3.9
007
Standard208/230
2.40 21205.8
460 2.6575 2.6
High Static208/230
2.90 25628.6
460 3.9575 3.9
008
Standard,Alternate
208/2302.40 2120
5.8460 2.6575 2.6
High Static208/230
3.70 331312.2
460 5.5575 5.5
009
Standard208/230
2.40 21205.8
460 2.6575 2.6
High Static208/230
3.70 331312.2
460 5.5575 5.5
012
Standard208/230
2.40 21205.8
460 2.6575 2.6
Alternate208/230
2.90 26157.5
460 3.4575 3.4
High Static208/230
5.25 440015.0
460 7.4575 7.4
014
Standard208/230
3.70 331310.6
460 4.8575 4.8
Alternate208/230
5.25 440015.0
460 7.4575 7.4
Performance data (cont)→
300
51
ELECTRIC HEATING CAPACITIES ELECTRIC HEATING CAPACITIES (cont)
*Two heater packages required to provide kW indicated.NOTES:1. The kW ratings shown above are at 240, 480, and 600 v. Use the
LEGEND AND NOTES FOR ELECTRICAL DATA TABLES PAGES 52-56
LEGEND
*Heater capacity (kW) is based on heater voltage of 208 v, 240 v,480 v, and 600 v. Heaters are rated at 240 v, 480 v, or 600 v. If powerdistribution voltage to unit varies from rated heater voltage, heater kWwill vary accordingly. To determine heater capacity at actual unit volt-age, multiply 240 v, 480 v, or 600 v capacity by multipliers found intable on page 51.
†Used to determine minimum disconnect size per NEC.**Heaters are field installed only.
††Fuse or HACR circuit breaker.||Fusing in single point box provides the required branch circuitprotection.
NOTES:1. In compliance with NEC requirements for multimotor and combina-
tion load equipment (refer to NEC Articles 430 and 440), the overcur-rent protective device for the unit shall be fuse or HACR breaker. TheCanadian units may be fuse or circuit breaker.
2. Unbalanced 3-Phase Supply VoltageNever operate a motor where a phase imbalance in supply voltage isgreater than 2%. Use the following formula to determine the percentof voltage imbalance.% Voltage Imbalance
Example: Supply voltage is 460-3-60.
AB = 452 vBC = 464 vAC = 455 v
= 457Determine maximum deviation from average voltage. (AB) 457 – 452 = 5 v(BC) 464 – 457 = 7 v (AC) 457 – 455 = 2 v
Maximum deviation is 7 v.
Determine percent of voltage imbalance.
% Voltage Imbalance = 100 x
= 1.53%This amount of phase imbalance is satisfactory as it is below themaximum allowable 2%.
FLA — Full Load AmpsHACR — Heating, Air Conditioning and RefrigerationIFM — Indoor (Evaporator) Fan MotorLRA — Locked Rotor AmpsMCA — Minimum Circuit AmpsMOCP— Maximum Overcurrent ProtectionNEC — National Electrical CodeOFM — Outdoor (Condenser) Fan MotorRLA — Rated Load Amps
= 100 x max voltage deviation from average voltageaverage voltage
Average Voltage =452 + 464 + 455
3
=1371
3
IMPORTANT: If the supply voltage phase imbalance is more than 2%,contact your local electric utility company immediately.
7457
58
Typical piping and wiring — 50TJ004-014(size 008-014 shown)
4. Set heat anticipator at 1 amp.5. Use copper conductors only.6. Use copper, copper-clad aluminum or aluminum
conductors.7. For 208/230-3-60 v units TRAN is wired for 208-v
unit. If unit is to be run with 208-v power supply,disconnect BLK wire from 230-v tap (RED) andconnect to 208-v tap (BLU). Insulate end of 230-vtap.
61
Operating sequenceCooling, units without economizer — When thermo-stat calls for cooling, terminals G and Y1 are energized.The indoor (evaporator) fan contactor (IFC), and compres-sor contactor no. 1 (C1) are energized and evaporator-fanmotor, compressor no. 1 and condenser fans start. Theliquid line solenoid valve for compressor no. 1 is deener-gized to open. The condenser-fan motor runs continuouslywhile unit is cooling. On 50TJ008-014 units, if the ther-mostat calls for a second stage of cooling by energizing Y2,compressor contactor no. 2 (C2) is energized and com-pressor no. 2 starts.Heating, units without economizer (If AccessoryHeater is Installed) — Upon a call for heating throughterminal W1, IFC and heater contactor no. 1 (HC1) areenergized. On units equipped for 2 stages of heat, whenadditional heat is needed, HC2 is energized through W2.Cooling, units with Durablade economizer — Whenthe outdoor-air temperature is above the outdoor-air ther-mostat (OAT) setting and the room thermostat calls forcooling, compressor contactor no. 1 is energized to startcompressor no. 1 and the condenser-fan motor. Theevaporator-fan motor is energized and the economizerdamper moves to the minimum position. Upon a furthercall for cooling, compressor contactor no. 2 will be ener-gized (50TJ008-014), starting compressor no. 2. After thethermostat is satisfied, the damper moves to the fullyclosed position.
When the outdoor-air temperature is below the OAT set-ting and the thermostat calls for cooling, the economizerdampers move to the minimum position. If the supply-airtemperature is above 57 F, the damper continues to openuntil it reaches the fully open position or until the supply-air temperature drops below 57 F.
When the supply-air temperature falls to between 57 Fand 52 F, the damper will remain at an intermediate openposition. If the supply-air temperature falls below 52 F, thedamper will modulate closed until it reaches the minimumposition or until the supply-air temperature is above 52 F.When the thermostat is satisfied, the damper will move tothe fully closed position.
If the outdoor air alone cannot satisfy the coolingrequirements of the conditioned space, economizer cool-ing is integrated with mechanical cooling, providingsecond-stage cooling. Compressor no. 1 and thecondenser fan will be energized and the position of theeconomizer damper will be determined by the supply-airtemperature. Compressor no. 2 (50TJ008-014) is lockedout.
When the second stage of cooling is satisfied, the com-pressor and condenser-fan motor will be deenergized.The damper position will be determined by the supply-airtemperature.
When the first stage of cooling is satisfied, the damperwill move to fully closed position.Cooling, units with EconoMi$er (50TJ004-007)When the outdoor-air temperature (OAT) is above theECON SP set point and the room thermostat calls forStage 1 cooling (R to G + Y1), the indoor (evaporator) fanmotor (IFM) is energized and the EconoMi$er dampermodulates to minimum position. The compressor contac-tor is energized to start the compressor and outdoor (con-denser) fan motor (OFM). After the thermostat is satisfied,
the damper modulates to the fully closed position when theIFM is deenergized.
When the OAT is below the ECON SP setting and theroom thermostat calls for Stage 1 cooling (R to G + Y1),the EconoMi$er modulates to the minimum position whenthe IFM is energized. The EconoMi$er provides Stage 1 ofcooling by modulating the return and outdoor-air dampersto maintain a 55 F supply air set point. If the supply-airtemperature (SAT) is greater than 57 F, the EconoMi$ermodulates open, allowing a greater amount of outdoor airto enter the unit. If the SAT drops below 53 F, the outdoorair damper modulates closed to reduce the amount of out-door air. When the SAT is between 53 and 57 F, theEconoMi$er maintains its position.
If outdoor-air alone cannot satisfy the cooling require-ments of the conditioned space, and the OAT is above theMECH CLG LOCKOUT set point, the EconoMi$er inte-grates free cooling with mechanical cooling. This is accom-plished by the strategies below.NOTE: Compressor has a 2-minute Minimum On, Mini-mum Off, and Interstage delay timer.
1. If Y1 is energized, and the room thermostat calls forY2 (2-stage thermostat), the compressor and OFMare energized. The EconoMi$er damper is main-tained at its current position.
2. If Y1 is energized for more than 20 minutes, and Y2is not energized (whether or not a 2-stage thermostatis used), the compressor and OFM are energized.The EconoMi$er damper is maintained at its currentposition.
3. If Y1 is energized, and the compressor is alreadyenergized (see Step 2) and the room thermostat callsfor Y2, the compressor continues to operate.
4. If compressor is energized and the thermostat is satis-fied, the compressor, the OFM, and IFM are deener-gized and the EconoMi$er modulates closed.
When the OAT is below the MECH CLG LOCKOUT setpoint, the compressors remain off.Cooling, units with EconoMi$er (50TJ008-014)When the outdoor-air temperature (OAT) is above theECON SP set point and the room thermostat calls forStage 1 cooling (R to G + Y1), the indoor (evaporator) fanmotor (IFM) is energized and the EconoMi$er dampermodulates to minimum position. The compressor contac-tor is energized to start the compressor and outdoor (con-denser) fan motor (OFM). After the thermostat is satisfied,the damper modulates to the fully closed position when theIFM is deenergized.
When the OAT is below the ECON SP setting and theroom thermostat calls for Stage 1 cooling (R to G + Y1),the EconoMi$er modulates to the minimum position whenthe IFM is energized. The EconoMi$er provides Stage 1 ofcooling by modulating the return and outdoor-air dampersto maintain a 55 F supply air set point. If the supply-airtemperature (SAT) is greater than 57 F, the EconoMi$ermodulates open, allowing a greater amount of outdoor airto enter the unit. If the SAT drops below 53 F, the outdoorair damper modulates closed to reduce the amount of out-door air. When the SAT is between 53 and 57 F, theEconoMi$er maintains its position.
Controls
62
If outdoor-air alone cannot satisfy the cooling require-ments of the conditioned space, and the OAT is above theMECH CLG LOCKOUT set point, the EconoMi$er inte-grates free cooling with mechanical cooling. This is accom-plished by the strategies below.NOTE: Compressors have a 2-minute Minimum On, Mini-mum Off, and Interstage delay timer.
1. If Y1 is energized, and the room thermostat calls forY2 (2-stage thermostat), compressor no. 1 and OFMare energized. The EconoMi$er damper is main-tained at its current position.
2. If Y1 is energized for more than 20 minutes, and Y2is not energized (whether or not a 2-stage thermostatis used), compressor no. 1 and OFM are energized.The EconoMi$er damper is maintained at its currentposition.
3. If Y1 is energized, and compressor no. 1 is alreadyenergized (see Step 2) and the room thermostat callsfor Y2, compressor no. 1 continues to operate. If Y2remains energized for more than 20 minutes, com-pressor no. 2 is energized.
NOTE: Compressor no. 2 cannot be energized unlessthere is a signal for Y2 from the space thermostat.
4. If compressor no. 2 is energized, and the Y2 signalfrom the thermostat is satisfied, compressor no. 1and 2 are deenergized. Reasserting Y2 will start com-pressor no. 1 and (after a 20-minute interstage delay)compressor 2.
5. If compressor no. 1 is energized and the thermostat issatisfied, compressor no. 1, the OFM, and IFM aredeenergized and the EconoMi$er modulates closed.
When the OAT is below the MECH CLG LOCKOUT setpoint, the compressors remain off.Heating, units with economizer (If AccessoryHeater is Installed) — When the room thermostat callsfor heat through terminal W1, the evaporator-fan contac-tor and heater contactor no. 1 are energized. On unitsequipped for 2 stages of heat, when additional heat isneeded, heater contactor no. 2 is energized through W2.The economizer damper moves to the minimum positionduring heating. When the thermostat is satisfied, thedamper moves to the fully closed position.
TEMP systemsA TEMP System is a network of communicating CarrierTEMP System Thermostats and rooftop, factory-mountedApollo direct digital controls, each serving its own zoneand heating/cooling unit. Networking allows your buildingmanager to easily access each of your systems from asingle location...whether they are in the same building orlocated throughout town.
The TEMP System’s inherently flexible, modular basedesign supports the exact number of independent,single zone systems you require...no more, no less, nocompromises.
Ideal for department stores, small office buildings, fastfood chains, schools, and hotels, a TEMP System is acost-effective way to maintain comfortable buildingenvironments.
Controls (cont)
TEMP SYSTEM THERMOSTAT (WITH TIMECLOCK) TEMP SYSTEM THERMOSTAT (WITHOUT TIMECLOCK)
63
LEG
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64
Variable Volume/Variable Temperature (VVT|) Systems VVT Systems are dedicated to total building comfort.Carrier thermostats, zone dampers, and HVAC equipmentwith factory-mounted direct digital controls continuallymonitor and adjust their operation to ensure uninterruptedand personalized comfort for all occupants.
Through the use of communicating electronic controls,VVT Systems are able to provide the comfort of a multiplezone system while using the installation, operating andmaintenance economics of single zone equipment... virtu-ally putting an end to the cost vs comfort compromise.
Controls (cont)
65
Outdoor installation — Units approved for outdoorinstallation only.Ductwork — Secure vertical discharge ductwork to roofcurb. For horizontal discharge applications, either attachductwork to unit, or use field-supplied flanges attached tothe horizontal discharge openings and attach all ductworkto flanges.Horizontal discharge — To convert from vertical dis-charge to horizontal discharge (Durablade economizer ortwo-position damper only):
1. Remove economizer or two-position damper to gainaccess to return duct opening.
3. Rotate economizer or two-position damper90 degrees.
4. Rotate the barometric relief damper 90 degrees.5. Install block-off plate over the opening on the access
panel.Thru-the-bottom power connections — For applica-tions requiring thru-the-bottom connections, Carrier acces-sory thru-the-bottom package must be purchased to ensureproper connections.Thermostat — Use of 2-stage heating and cooling ther-mostat is recommended for all units. A 2-stage coolingthermostat is required on units with accessory economizerto provide integrated cooling.Heating-to-cooling changeover — All units are auto-matic changeover from heating to cooling when automaticchangeover thermostat and subbase are used.Airflow — Units are draw-thru on cooling and blow-thruon heating.Maximum airflow — To minimize the possibility of con-densate blow-off from evaporator, airflow through unitsshould not exceed 500 cfm/ton.
Minimum airflow — For cooling, minimum airflow is300 cfm/ton. For units with electric heating, required min-imum cfm is 900 for 50TJ004; 1200 for 50TJ005; 1500for 50TJ006; 1800 for 50TJ007; 2250 for 50TJ008;2550 for 50TJ009; and 3000 for 50TJ012 and 014, withthe following exceptions:
Minimum ambient cooling operating temperature— The minimum temperature for standard units is 25 F.With accessory Motormaster® IV control and field-supplied wind baffles, units can operate at outdoor temper-atures down to –20 F.Maximum operating outdoor-air temperature — Forcooling, this temperature is 115 F.Internal unit design — Due to Carrier’s internal unitdesign (draw-thru over the motor), air path, and speciallydesigned motors, the full horsepower (maximum contin-uous bhp) listed in the Physical Data table and the notesfollowing each Fan Performance table can be utilized withconfidence.
Using Carrier motors with the values listed in the Physi-cal and Fan Performance Data tables will not result in nui-sance tripping or premature motor failure. The unitwarranty will not be affected.Apollo direct digital controls — The Apollo direct digi-tal controls must be used with either a Carrier master ormonitor thermostat.
Packaged Rooftop Cooling Unit with Electric Heat Option — Constant Volume ApplicationHVAC Guide SpecificationsSize Range: 3 to 121/2 Tons, Nominal CoolingCarrier Model Number: 50TJPart 1 — General1.01 SYSTEM DESCRIPTION
Outdoor rooftop- or slab-mounted, electrically con-trolled cooling unit with optional heat utilizing a her-metic compressor for cooling duty and electricresistance coils for heating duty. Unit shall dischargesupply air vertically or horizontally as shown on con-tract drawings.
1.02 QUALITY ASSURANCE A. Unit shall be rated in accordance with ARI
Standards 210/240 or 360 and 270.B. Unit shall be designed to conform to ASHRAE 15,
latest revision, and in accordance with UL 1995.C. Unit shall be UL tested and certified in accordance
with ANSI Z21.47 Standard and UL listed and certi-fied under Canadian Standards as a total packagefor safety requirements.
D. Roof curb shall be designed to conform to NRCAStandards.
E. Insulation and adhesive shall meet NFPA 90Arequirements for flame spread and smokegeneration.
F. Unit casing shall be capable of withstanding500-hour salt spray exposure per ASTM B117(scribed specimen).
G. Unit shall be designed in accordance withISO 9001, and shall be manufactured in a facilityregistered to ISO 9002/BS5750, Part 2.
1.03 DELIVERY, STORAGE, AND HANDLINGUnit(s) shall be stored and handled per manufac-turer’s recommendations.
Part 2 — Products2.01 EQUIPMENT (STANDARD)
A. General:Factory-assembled, single-piece cooling unit withoptional heat. Contained within the unit enclosureshall be all factory wiring, piping, controls, refriger-ant charge (R-22), and special features requiredprior to field start-up.
B. Unit Cabinet: 1. Unit cabinet shall be constructed of galvanized
steel, and shall be bonderized and coated with abaked enamel finish on all externally exposedsurfaces.
2. Evaporator fan cabinet interior shall be insu-lated with a minimum 1/2-in. thick, 1-lb densityneoprene coated, flexible fiberglass insulationcoated on the air side.
3. Cabinet panels shall be easily removable forservicing.
4. Holes shall be provided in the base rails for rig-ging shackles to facilitate overhead rigging, andforklift slots shall be provided to facilitatemaneuvering.
5. Unit shall have a factory-installed, sloped con-densate drain pan made of a non-corrosivematerial, providing a minimum 3/4-in. connec-tion with both vertical and horizontal drains andshall comply with ASHRAE 62.
6. Unit shall have factory-installed filter accesspanel to provide filter access with tool-lessremoval.
7. Unit shall have standard thru-the-bottom powerconnection capability. (Accessory kit is required.)
C. Fans:1. Indoor blower (evaporator fan) shall be of the
direct- or belt-driven, double inlet, forward-curved, centrifugal type. Belt drive shall includean adjustable-pitch motor pulley.
2. Indoor blower (evaporator fan) shall be madefrom steel with a corrosion-resistant finish andshall be dynamically balanced.
3. Bearings shall be of the sealed, permanentlylubricated, ball-bearing type for longer life andlower maintenance.
4. Condenser fan shall be of the direct-driven pro-peller type and shall discharge air vertically.
5. Condenser fan shall have aluminum blades riv-eted to corrosion-resistant steel spiders andshall be dynamically balanced.
D. Compressor(s):1. Reciprocating or scroll type, fully hermetic
type, internally protected. 2. Factory mounted on rubber grommets and
internally spring mounted for vibration isolation. 3. On independent circuits (008-014).
E. Coils:1. Condenser coils shall have aluminum plate fins
mechanically bonded to enhanced copper tubeswith all joints brazed.
2. Tube sheet openings shall be belled to preventtube wear.
3. Evaporator coil shall be of the full face activedesign.
F. Refrigerant Components:Refrigerant circuit components shall include:
1. Acutrol™ metering system. 2. Refrigerant filter drier. 3. Service gage connections on suction, discharge,
and liquid line.G. Filter Section:
1. Standard filter section shall consist of factory-installed low-velocity, throwaway 2-in. thickfiberglass filters of commercially available sizes.
2. Filter face velocity shall not exceed 320 fpm atnominal airflows.
3. Filter section shall use only one size filter.4. Filters shall be accessible through an access
panel with “no-tool” removal.H. Controls and Safeties:
1. Unit Controls:Unit shall be complete with self-contained low-voltage control circuit.
Guide specifications
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2. Standard Safeties:a. Unit shall incorporate compressor overtem-
perature and overcurrent safety devices toshut off compressor.
b. Heating section shall be provided with thefollowing minimum protections:1) High-temperature limit switches.2) Overcurrent protection.
I. Operating Characteristics:1. Unit shall be capable of starting and running at
115 F ambient outdoor temperature, meetingmaximum load criteria of ARI Standard 210/240 or 360 at ±10% voltage.
2. Compressor with standard controls shall becapable of operation down to 25 F ambientoutdoor temperature.
J. Electrical Requirements:All unit power wiring shall enter unit cabinet at a sin-gle factory-predrilled location.
K. Motors:1. Compressor motors shall be cooled by refriger-
ant passing through motor windings and shallhave line break thermal and current overloadprotection.
2. Indoor blower (evaporator fan) motor shall havepermanently lubricated bearings and inherentautomatic-reset thermal overload protection.
3. Totally enclosed condenser-fan motor shall havepermanently lubricated bearings, and inherentautomatic-reset thermal overload protection.
L. Special Features:Certain features are not applicable when the fea-tures designated by * are specified. For assistance inamending the specifications, contact your localCarrier Sales Office.* 1. Direct Digital Communicating Controls:
a. Shall be available as a factory-installedoption.
b. Shall actively monitor all modes of opera-tion, as well as evaporator-fan status, filterstatus, indoor-air quality, supply-air temper-ature, outdoor-air temperature, and field-supplied sensors.
c. Shall work with Carrier TEMP and VVT®systems.
d. Shall have built-in diagnostics for thermostatcommands for both staged heating and cool-ing, evaporator-fan operation, and econo-mizer operation.
e. Shall be equipped with a 5-minute timedelay between modes of operation.
2. Roof Curbs (Horizontal and Vertical):a. Formed galvanized steel with wood nailer
strip and shall be capable of supportingentire unit weight.
b. Permits installing and securing ductwork tocurb prior to mounting unit on the curb.
* 3. Integrated Economizers:a. Integrated integral-modulating type capable
of simultaneous economizer and compressoroperation.
b. Includes all hardware and controls to providecooling with outdoor air.
c. Equipped with low-leakage dampers not toexceed 3% leakage at 1 in. wg pressure dif-ferential (Durablade economizer).
d. Capable of introducing up to 100% outdoorair in both minimum and fully openpositions.
e. Equipped with a gravity relief sliding platedamper (Durablade economizer). Dampershall close upon unit shutoff.
f. EconoMi$er shall be equipped with a baro-metric relief damper with up to 100% ofreturn air (004-007) or 90% of return air(008-014) relief. The Durablade econo-mizer is equipped with 30% of return-airrelief (004-014).
g. Designed to close damper during loss-of-power situations with emergency power sup-ply (Durablade economizer) or spring returnbuilt into motor (EconoMi$er).
h. Dry bulb outdoor-air temperature sensorshall be provided as standard. Enthalpy con-trol shall be provided as an option.
i. Durablade economizer is a guillotine-styledamper, and the EconoMi$er is a parallelblade design.NOTE: EconoMi$er shall also be availablewith field-installed power exhaust accessory.
* 4. Manual Outdoor-Air Damper:Manual damper package shall consist ofdamper, birdscreen, and rainhood which can bepreset to admit up to 50% outdoor air for year-round ventilation.
* 5. 100% Two-Position Damper:a. Two-position damper package shall include
single blade damper and motor. Admits upto 100% outdoor air.
b. Damper shall close upon indoor (evaporator)fan shutoff.
c. Designed to close damper during loss ofpower situations.
d. Equipped with barometric relief damper.* 6. 25% Two-Position Damper:
a. Two-position damper package shall includesingle blade damper and motor. Admits upto 25% outdoor air.
b. Damper shall close upon indoor (evaporator)fan shutoff.
c. Designed to close damper during loss ofpower situations.
d. Equipped with barometric relief damper.* 7. Solid-State Enthalpy Control:
a. For use with Durablade economizer packageonly.
b. Capable of sensing outdoor-air enthalpycontent (temperature and humidity) and con-trolling economizer cut-in point to have min-imum heat content air passing over theevaporator coil for most efficient systemoperation.
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Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.New Pg 68 Catalog No. 525-088 Printed in U.S.A. PC 111 Form 50TJ-9PD
Replaces: 50TJ-8PDBook 1 4Tab 1b 6b
Carrier Corporation • Syracuse, New York 13221 1-00 300
Book 1Tab OP2b
* 8. Electric Resistance Heaters:a. Open wire nichrome elements with all
necessary safety operating controls. b. UL listed and indicated on basic unit
informative plate. c. Available in multiples to match heating
requirements.* 9. Head Pressure Control Packages:
Each package consists of solid-state controland condenser-coil temperature sensor tomaintain condensing temperature between90 F and 110 F at outdoor ambient temper-atures down to –20 F by condenser-fanspeed modulation or condenser-fan cycling.
*10. Thermostat and Subbase:Provides staged cooling and heating auto-matic (or manual) changeover, fan control,and indicator light.
11. Thru-The-Bottom Service Connectors:Kit shall provide connectors to permit electri-cal connections to be brought to the unitthrough the basepan.
*12. Electronic Programmable Thermostat:Capable of using deluxe full-featured elec-tronic thermostat. Shall use built-in compres-sor cycle delay control for both heating andcooling duty. Capable of working withCarrier direct digital controls.
13. Condenser Coil Hail Guard Assembly:Hail guard shall protect against damage fromhail and flying debris.
14. Controls Upgrade Kit:Kit shall contain high-pressure, loss-of-charge/low-pressure, and freeze protectionswitches. It shall mount on factory-installedSchrader fittings.
15. Alternate Motors and/or Drives (004-006,008, 012, 014):Alternate motors and drives shall be factory-installed to provide additional performancerange.
16. High-Static Motor(s) and Drive(s) (50TJ004-012):High-static motor(s) and drive(s) shall be fac-tory-installed to provide an additional perfor-mance range.
17. Condenser Coil Grille:The grille protects the condenser coil fromdamage by large objects without increasingunit clearances.
18. Compressor Cycle Delay:Unit shall be prevented from restarting for aminimum of 5 min. after shutdown.
19. Fan/Filter Status Switch:Provides status of evaporator fan (ON/OFF)or filter (CLEAN/DIRTY). Status shall be dis-played over communication bus when usedwith direct digital controls or with an indica-tor light at the thermostat.
20. Energy$Recycler:The package shall be an outdoor rooftop orslab mounted, electronically controlled, air-to-air heat pump unit utilizing a rotary com-pressor for cooling and heating duty.The Energy$Recycler shall recover energyfrom building exhaust air and pre-conditionventilation air to allow higher ventilationrequirements and minimizing energy cost.
21. EconoMi$er and Power Exhaust:Package shall provide control of internalbuilding pressure. The system shall exhaustup to 100% of return air.
22. Power Exhaust for Accessory EconoMi$er:Power exhaust shall be used in conjunctionwith EconoMi$er to provide the system withthe capability to exhaust up to 100% ofreturn air. The power exhaust is field-installed accessory.
23. Outdoor-Air Enthalpy Sensor:The outdoor-air enthlapy sensor shall beused with the EconoMi$er device to providesingle enthalpy control. When used in con-junction with a return air enthalpy sensor,the EconoMi$er device will provide differententhalpy control. The sensor allows theEconoMi$er controller to determine if out-side air is suitable for free cooling.
24. Return-Air Enthalpy Sensor:The return-air enthalpy sensor shall be usedwith the EconoMi$er device. When used inconjunction with an outdoor air enthalpysensor, the EconoMi$er device will providedifferential enthalpy control.
25. Return-Air Temperature Sensor:The return-air temperature sensor shall beused with the EconoMi$er device. Whenused in conjunction with the standardoutdoor air temperature sensor, theEconoMi$er device will provide differentialtemperature control.
26. Indoor-Air Quality (CO2) Sensor:a. Shall have the ability to provide demand
ventilation indoor-air quality (IAQ) con-trol through the economizer with an IAQsensor.
b. The IAQ sensor shall be available in ductmount, wall mount, and wall mount withLED display. The set point shall haveadjustment capability.