739 REFRIGERATION STRAINERS AC & R OIL FILTER - POE OIL FILTER-DRIER S-4004 AC&R Components’ S-4004 Oil Filter removes foreign material from the oil as it passes through the filter. The filter easily captures any debris that may be in the sys- tem, such as dirt, metal chips, etc. (particle retention 10 micron). The S-4004 is required on all Electronic Oil Level Controllers to protect the solenoid manifold. S-4005 The use of polyolester Oil (POE) is required for use with the new HFC refrigerants. However, there are some drawbacks. 1. POE oil is more hygroscopic. It absorbs moisture at a much greater rate than mineral oils. Moisture in any system can produce harmful conditions. 2. POE oil is a potent solvent, capable of cleaning up pipe scale, sludge, and other system contaminants In order to trap these contaminants and moisture, fre- quent changing of the liquid and suction line filter-driers is recommended. Because the contaminants and mois- ture can return with the POE oil to the compressor’s crankcase, why not clean the oil at its source? AC&R Components, Inc. has developed the POE Oil Filter & Drier for POE oil return on systems using Oil Separators and Oil Control Systems. This is not a refrigerant Filter Drier. It is designed to operate at a very low pressure drop in a 100% oil environment. The “New” POE Oil Filter & Drier, Catalog No. S-4005, was designed to clean and dry POE oil as it is returned to the compressor crankcase or Oil Reservoir in parallel systems. Clean and dry POE oil assures the proper operation of the float assemblies in the Oil Separator and the Oil Level Regulators. The S-4005 POE Filter Drier features: 1. Extra large filter area: 325 sq. inches, to ensure cleanup of the oil. 2. Filled with 8 cubic inches of XH9 desiccant, the recommended desiccant for high moisture removal from POE oil. 3. High flow capacity with low pressure drop. 4. Same connection size as oil return line from Oil Separator (3/8-in.male flare). 5. UL approved. 6. No need to install multiple strainers to each oil level regulator. 7. Also for use with Alkybenzene and Mineral Oil. 8. Replace after 15 psig pressure drop. HENRY STRAIGHT-THROUGH STRAINERS — NON-CLEANABLE PART NO. 891S-1/4 1/4 FLARE 4.50 .48 891S-3/8 3/8 FLARE 5.00 11 100 .57 891S-5/8S 5/8 ODS 4.56 .50 .72 Design Features: 1. Steel. 2. Stainless steel screen. 3. Maximum working pressure: 500 PSI (35 KG/CM²). 4. Temperature rating: -20° F (-29° C) to +300° F (+149° C). 5. Suitable for refrigerants and other industrial fluids non-corro- sive to steel.
39
Embed
REFRIGERATION STRAINERS - dms.hvacpartners.comREFRIGERATION STRAINERS AC & R OIL FILTER - POE OIL FILTER-DRIER S-4004 AC&R Components’ S-4004 Oil Filter removes foreign material
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
739
REFRIGERATION STRAINERS
AC & R OIL FILTER - POE OIL FILTER-DRIERS-4004
AC&R Components’ S-4004 Oil Filter removes foreign material from the oil as it passes through the filter. The filter easily captures any debris that may be in the sys-tem, such as dirt, metal chips, etc. (particle retention10 micron). The S-4004 is required on all Electronic Oil Level Controllers to protect the solenoid manifold.
S-4005
The use of polyolester Oil (POE) is required for use with the new HFC refrigerants. However, there are some drawbacks.
1. POE oil is more hygroscopic. It absorbs moisture at a much greater rate than mineral oils. Moisture in any system can produce harmful conditions.
2. POE oil is a potent solvent, capable of cleaning up pipe scale, sludge, and other system contaminants
In order to trap these contaminants and moisture, fre-quent changing of the liquid and suction line filter-driers is recommended. Because the contaminants and mois-ture can return with the POE oil to the compressor’s crankcase, why not clean the oil at its source?
AC&R Components, Inc. has developed the POE Oil Filter & Drier for POE oil return on systems using Oil Separators and Oil Control Systems.
This is not a refrigerant Filter Drier. It is designed to operate at a very low pressure drop in a 100% oil environment.
The “New” POE Oil Filter & Drier, Catalog No. S-4005, was designed to clean and dry POE oil as it is returned to the compressor crankcase or Oil Reservoir in parallel systems. Clean and dry POE oil assures the proper operation of the float assemblies in the Oil Separator and the Oil Level Regulators.
The S-4005 POE Filter Drier features:
1. Extra large filter area: 325 sq. inches, to ensure cleanup of the oil.
2. Filled with 8 cubic inches of XH9 desiccant, the recommended desiccant for high moisture removal from POE oil.
3. High flow capacity with low pressure drop.
4. Same connection size as oil return line from Oil Separator (3/8-in.male flare).
5. UL approved.
6. No need to install multiple strainers to each oil level regulator.
• SCREEN CARTRIDGES ARE SECURELY LOCATED BY MEANS OF SPRING TENSION, PREVENTING BY-PASSING OF REFRIGERANT.ANGLE TYPE
866 ( )P383
• Y TYPE STRAINERS FOR WATER AND STEAM SERVICE.
• 20 MESH STAINLESS STEEL, OTHER OPTIONS AVAILABLE.
• 400 WOG @ 210° F, WSP 125. LBS @ 400° F.
• 777S THREADED CONNECTIONS.
• S777S SWEAT CONNECTIONS.
• TAPED FOR CLOSURE PLUG (CLOSURE PLUG NOT INCLUDED).
• MAXIMUM PRESSURE RATINGS FOR SWEAT IS 400 PSI @ 150° F AND REQUIRES 95-5 SOLDER (REF. ANSI B16.18) AND STEAM RATING @ 15 PSI MAXIMUM.
.
SIZEDIMENSIONS MFG P/N P/N
A B C THREADED SWEAT THREADED SWEAT1/2″ 3″ 2″ 3/8″ NPT 1/2″ 777S 1/2″ S777S WAT 1/2 777S WAT 1/2 S777S3/4″ 3-5/16″ 2-5/16″ 3/4″ NPT 3/4″ 777S 3/4″ S777S WAT 3/4 777S WAT 3/4 S777S1″ 4-1/2″ 2-15/16″ 3/4″ NPT 1″ 777S 1″ S777S WAT 1 777S WAT 1 S777S
1-1/4″ 5-1/8″ 3- I/8″ 3/4″ NPT 1-1/4″ 777S 1-1/4″ S777S WAT 11/4 777S WAT 11/4 S777S1-1/2″ 5-7/8″ 3-1/4″ 1″ NPT 1-1/2″ 777S 1-1/2″ S777S WAT 11/2 777S WAT 11/2 S777S
2″ 6-3/16″ 5-7/8″ 1-1/4″ NPT 2″ 777S 2″ S777S WAT 2 777S WAT 2 S777S3″ 10-1/8″ 6-1/16″ 1-1/2″ NPT 3″ 777S WAT 3 777S4″ 13″ 10-1/2″ 1-1/2″ NPT 4″ 777S WAT 4 777S
741
REFRIGERATION STRAINERS
PARKER COPPER STRAINERS/STRAINER DISTRIBUTORSStrainers are low cost filtration devices designed to protect refrig-eration components, including valves, compressors and capillary tubes, from system contaminants.
P4092
Key Features and Benefits
• Copper construction to resist corrosion.
• 500 psig design pressure.
• Available in a variety of inlet and outlet sizes.
• UL recognized (File SA-8570) and CSA certified (LR-87950).
Proper selection of strainers is based on two parameters:
1. Maximum operating pressure
2. Contaminants present in the system.
Maximum Operating Pressure
Information regarding operating pressure is required to ade-quately size the wall thickness of the strainer to attain the ultimate burst pressure. In accordance with Underwriters Laboratories (UL) and Canadian Standards Association (CSA), the burst pres-sure for Parker strainers is rated as five times the design working pressure of the system. Listed in the catalog as design working pressure, this value can be correlated to tube diameter and wall thickness in order to meet specific UL specifications.
Contaminants
To determine the type and area of the screen, information about contaminants is needed. The size, type and cleanliness of the refrigeration system and its components, as well as the control of the assembly process, all determine the amount and size of the contaminants to be trapped by the strainer. The most common
size of screen is 150 x 140 mesh which is used to protect capil-lary tubes. An extra large screen area should be selected if the strainer is expected to trap large amounts of foreign material. The large screen area will ensure there is enough area for passage of fluid without causing pressure drop.
Recommended Screen Area
Strainer Screen Dimensions
SCREENAREA(sq in.)
LOW TEMPR-12 & R-134a
0° or Below
MED. TEMPR-12 & R-134a0° F or Above
LOW TEMPR-22
AIR COND.R-22
0.8 1/8 hp 1/4 hp 1/8 hp 1/3 hp1.8 1/4 hp 1/3 hp 1/3 hp 1/2 hp2.2 1/3 hp 1/2 hp 1/2 hp 3/4 hp2.3 1/2 hp 3/4 hp 3/4 hp 1 hp5.2 1-1/2 hp 2 hp 1-1/2 hp 3 hp6 2 hp 3 hp 2 hp 5 hp
MESHDIAMETEROF WIRE
PARTICLE SIZE
MAXIMUMDIAMETER
SCREENMATERIAL
MICRONSIZE
% OPENAREA
100 x 90 0.0045 0.0055 s.s. 140 30%120 x 108 0.0036 0.0046 brass 117 30%150 x 140 0.0026 0.0041 s.s. 104 37%
057073-01 500 140 1.96 3/8 8 @ 1/8 4.25MODIFIED STANDARD
441601 360-540 104 1.96 see chart below 3.8-4.3
Inlet Options
Inlet No. of Holes3/16 11/4 1, 2
5/16 1, 23/8 11/2 15/8 1
Outlet Options
NOTE: All 1-in. O.D. strainers are Underwriters’ Laboratories recognized file SA-8570, guide card SMGT-2 and Canadian Standards Association certified file No. LR-87950 Model 1025.
058307-00 500 140 8.37 1/2 1/2 5.13MODIFIED STANDARD
441901 500 104 2.32 see chart below 5.8-6.5
Inlet Options
Inlet No. of Holes1/4 1
5/16 1, 23/8 1, 21/2 15/8 1
Outlet Options
NOTE: All 1-3/16-in. O.D. strainers are Underwriters’ Laboratories recog-nized file SA-8570, guide card SMGT-2 and Canadian Standard Associa-tion certified file No. LR-87950 Model 319.
NOTE: All 1-5/8-in. O.D. strainers are Underwriters’ Laboratories recognized file SA-8570, guide card SMGT-2 and Canadian Standard Association certified file No. LR-87950 Model 1638.
HEAD PRESSURE CONTROLSTOTALINE® HEAD PRESSURE CONTROLS
Maintains proper air cooled condenser pressures during periods of low outdoor ambient conditions.
Without proper control of condensing pressure, poor refrigeration and component damage can occur. The Totaline HeadMaster control offers an efficient and economical approach to this com-mon industry problem on air cooled condensers.
The HeadMaster 3-way head pressure control valve eliminates the need for special piping or multiple control valves. As a single unit it simplifies piping and reduces the installation costs.
PRECAUTIONS
1. The HeadMaster control should not be used on a system which does not have a liquid receiver or on one with a receiver which is too small. If the receiver does not have adequate storage space, the refrigerant will back up in the condenser to produce excessively high discharge pressures during high ambient air temperatures. This will cause system damage and/or personal injury.
2. The HeadMaster control should be used only on systems which employ a thermostatic expansion valve.
3. Good refrigeration practice states that the total system charge should not exceed 75% of the receiver capacity.
4. Condenser fans should not be cycled when using the Head-Master control. The sudden changes in high side pressure caused by fan cycling will result in erratic thermostatic expan-sion valve performance and shortened head pressure control life.
OPERATION
The HeadMaster control is a three-way modulating valve con-trolled by the discharge pressure. At outdoor temperatures which cause the compressor discharge pressure to be above the head pressure control valve setting, there is no refrigerant flow through the “B” port of the valve. The flow is through the condenser and valve ports “C” and “R”, as shown in FIGURE A.
FIGURE A
As ambient air temperature falls, there will be a corresponding decrease in head pressure. When the discharge pressure fails below the valve setting, discharge gas will flow through the “B” port into the receiver, creating a higher pressure at the condenser outlet. The higher pressure at the condenser outlet reduces the flow from Port “C” and causes the level of condensed liquid to rise in the condenser, as shown in FIGURE B.
The flooding of the condenser with liquid reduces the available condensing surface. The result is to increase the pressure in the condenser and maintain an adequate high side pressure.
FIGURE B
ADDITIONAL REFRIGERANT
On most systems, an additional amount of refrigerant will be required. It is essential to have enough to completely fill the con-denser for the lowest ambient condition. To accurately determine the amount of additional refrigerant charge required to fill the con-denser, find the total length of condenser tubing in feet, and multi-ply by the number of pounds of refrigerant per foot for a given size tubing. Table #1 shows the liquid refrigerant per foot, per lowest winter temperature to be encountered.
Do not select a valve for a capacity rating exceeding 5 psi pres-sure drop from Port “C” to Port “B” or for a system with more than 20 psi pressure drop across the condenser.
During normal ambient conditions the available liquid sub-cooling in the condenser shall be adequate to cover the existing pressure drop through the HeadMaster control.
If a valve is selected for a given flow rate, the resultant pressure drop must not cause the liquid pressure to drop below saturation and produce flash gas. If sufficient sub-cooling is not available to cover this pressure drop, it is suggested that more than one valve be installed in parallel to reduce the pressure drop to tolerable lim-its (see FIGURE D). Do not parallel valves of different capaci-ties. Liquid drain lines from the condenser to receiver are generally sized for a velocity of 150 ft./Min.
The HeadMaster control is factory set to provide an average con-densing temperature consistent with good system performance. The complete type number includes the service reference code, port size, connection size and style, see FIGURE C. For sizing selection see Table #2. When ordering be sure to specify the com-plete type number.
NOTE: Be sure valve is not required to operate at conditions exceeding maximum safe working pressure of 440 PSI.
• SERVICE REFERENCE CODE
FIGURE C
CAPACITY AND SELECTION
The nominal HeadMaster control capacity in tons is shown in Table #3 for R-12, R-22 and R-502. The nominal capacity is based on 100° F liquid, 40° F evaporator and the pressure drop shown. To obtain capacities in tons at other liquid and evaporator condi-tions, multiply the nominal capacity at the desired pressure drop by the factor in Table #4 given for the existing liquid temperature and evaporator temperature.
*Other fluorinated refrigerants, for example R-500, can be used at the stated temperatures and pressures.**P-band = proportional band. Proportional band is the change in pressure required to move valve from full closed to full open position.
ORDERING
*Nominal capacity is the regulator capacity at: Evaporating temperature to = +15° FCondensing temperature tk = +100° F Pressure drop in regulator ∆p = 2 psiP-band for CPR = 20 psi.
NOTE: The connections chosen must be too small in diameter since gas velocities in excess of 130 ft./sq. in the connector of the regulator can cause flow noise.
The CPR crankcase pressure regulator is mounted in the suction line ahead of the compressor.
Its purpose is to protect the compressor motor against overload due to high suction pressures during start up after long standstill periods (high temperature in the cold room) and after defrostperiods.
Type CPR makes it possible to use a small motor on low tempera-ture systems. A smaller motor will, during normal operation, oper-ate with improved efficiency, since the motor size is better suited to the load.
At the same time the improved efficiency means that the motor does not overheat. This is important in the case of suction gas cooled hermetic and semi-hermetic compressors.
• PULSATION DAMPING DESIGN minimizes flow noise; extends regulator life.
• COMPACT ANGLE DESIGN for ease of installation.
• “HERMETIC”, brazed construction design, no synthetic o-rings, or gaskets to wear and leak.
• APPLICABLE TO R-12, R-22, R-502, and other fluorinated refrigerants.
P388
749
PRESSURE REGULATORS
TOTALINE EVAPORATOR PRESSURE REGULATORS - TYPE EPR
TECHNICAL DATA
*Other fluorinated refrigerants, for example R-500, can be used at the stated temperatures and pressures.**P-band = proportional band. Proportional band is the change in pressure required to move valve from full closed to full open position.
ORDERING
*Nominal capacity is the regulator capacity at: Evaporating temperature to = +15° FCondensing temperature tk = +100° FPressure drop in regulator ∆p = 3 psiOffset = 8 psi.
NOTE: The connections chosen must be too small in diameter since gas velocities in excess of 130 ft./sq. in the connector of the regulator can cause flow noise.
The EPR evaporating pressure regulator is mounted in the suc-tion line after the evaporator and is used for:
1. Maintaining a constant evaporating pressure and thus a constant evaporator surface temperature. Regulation is modu-lating. In the event of throttling in the suction line, the extracted quantity of refrigerant gas is matched to the evaporator load.
2. Protection against too low an evaporating pressure — for example, as a safeguard against freezing up of a water chiller. The regulator closes when the pressure in the evaporator drops below the set value.
Type EPR is highly suitable for these functions since it has a rela-tively small P-band and regulation accuracy even with large load variations.
The drawing shows a EPR mounted in the suction line on a sys-tem having two evaporators. On systems where more than one evaporator is connected to the same compressor the EPR is mounted in the suction line from the evaporator in which the pres-sure is to be kept higher than the design suction pressure.
The regulator will then throttle the suction gas from the required higher evaporating pressure to the design suction pressure.
• PULSATION DAMPING DESIGN minimizes flow noise; extends regulator life.
• COMPACT ANGLE DESIGN for ease of installation.
• “HERMETIC”, brazed construction design, no synthetic o-rings, or gaskets to wear and leak.
• APPLICABLE TO R-12, R-22, R-502, and other fluorinated refrigerants.
P276
750
PRESSURE REGULATORS
TOTALINE HOT-GAS BYPASS REGULATORS
TECHNICAL DATA
*Other fluorinated refrigerants, for example R-500, can be used at the stated temperatures and pressures.**Control pressure when the regulator begins to open.
ORDERING
*Nominal capacity is the regulator capacity at: Suction temperature ts = +26° FCondensing temperature tk = +100° F After a suction temperature reduction of ∆ts = 6° F.
Regulators are used to adapt compressor capacity to actual evap-orator load.
Capacity regulation by hot-gas injection at the evaporator inlet has the advantage that the thermostatic expansion valve reacts to the increased superheat of the refrigerant at the evaporator inlet, and injects the extra amount of liquid necessary to remove the super-heat. This method avoids the installation of a special injection valve to cool the suction gas.
Another advantage is that gas velocity in the evaporator is increased so that oil return is improved. This is especially impor-tant when the evaporator is positioned lower than the compressor.
Hot-gas bypass regulators are installed in a bypass between the high and low pressure sides of the refrigeration system.
When the load on the evaporator and the corresponding load on the compressor falls, the suction pressure of the compressor falls. This opens the regulator to produce a “false” load (replacement load) on the evaporator, in the form of hot-gas from the high pres-sure side.
Hot-gas bypass regulators are especially suitable for hot-gas injection at the evaporator inlet, between the thermostatic expan-sion valve and the liquid distributor.
Hot-gas bypass regulators are equipped with a control pressure connection for the refrigeration system suction line. In this way, the degree of opening of the regulator is directly determined by the compressor suction pressure, independent of the pressure drop on the evaporator side.
Hot-gas bypass regulators are primarily designed for refrigeration systems with one evaporator.
P390
P277
751
PRESSURE REGULATORSDANFOSS HOT-GAS BYPASS REGULATORS, TYPE CPCE LIQUID-GAS MIXERS, TYPE LG
DANFOSS HEAT RECOVERY REGULATORS, HEAD PRESSURE REGULATORS, TYPE KVR, DIFFERENTIAL PRESSURE VALVES, TYPE NRD
TECHNICAL DATA
*Other fluorinated refrigerants, for example R-500, can be used at the stated temperatures and pressures.**Provided that the Schraeder valve is removed and the connector is sealed with seal cap and nut — otherwise +200° F.
ORDERING
*The rated capacity is the regulator capacity at evaporating temperature to = +40° F concerning liquid and 0° F concerning hot-gas, condensing tempera-ture tk = +100° F and pressure drop across the valve ∆p = 3 p.
A liquid-gas mixer type LG should be used for hot-gas injection.
The object of the LG is to create a mono-geneous mixture of the hot-gas from the CPCE regulator and the liquid from the thermostatic expansion valve so that the function of the liquid distributor (next in the system) remains unimpaired.
The liquid-gas mixer type LG can also be used in connection with hot-gas defrosting or with reverse cycle systems.
Regulator systems KVR + NRD are used to maintain a constant and sufficiently high condensing and receiver pressure in systems with heat recovery or in refrigeration and air conditioning systems with air-cooled condensers.
During winter operation the ambient temperature falls and with it the condensing pressure of the air-cooled condenser falls.
KVR-regulation is dependent on the inlet pressure. It begins to throttle when the pressure falls below the pressure setting.
Consequently, the condenser is partially filled with liquid, so that the effective condensing surface is reduced. In this way the required condensing pressure is restored.
Since the real regulation task during winter operation is to keep the receiver pressure at a suitably high value, KVR is combined with a differential pressure valve type NRD, which is sitted in the bypass line shown. NRD begins to open at a differential pressure of 20 psi.
When the condensing pressure falls, KVR will begin to throttle. This increases the total pressure drop across the condenser + KVR. When this pressure drop reaches 20 psi, NRD will begin to open thus ensuring that the receiver pressure is maintained.
As a rule of thumb, it can be assumed that the pressure in the receiver is equal to the set pressure of the KVR less 14 psi.
During summer operation, when the KVR is fully open, the total pressure drop across the condenser and KVR is less than 20 psi. The NRD is therefore closed.
To avoid inadvertent opening of the NRD the pressure drop across the condenser at max. load must not exceed 10 psi. If this pressure is exceeded, two NRD units can be used in series instead of one.
During summer operation the charge can accumulate in the receiver. Therefore the system must be equipped with a sufficiently large receiver to store the excess refrigerant.
P392
P278
752
PRESSURE REGULATORSALCO EPRB(S) BRASS BODY UPSTREAM REGULATOR
EPRB(S) EXPLODED VIEW
This Evaporator Pressure Regulator is a new lightweight, energy-efficient pilot operated regulator. It is supplied with copper connections to allow easy installation into the system. The pilot operation is dependent upon high side system pressure which minimizes the pressure drop across the regulator. This regulator is of normally-open construction so that a manual operator is not required for system evacuation. A solenoid version having the suction stop is available as an option.
ALCO EPRB(S) series regulators are pilot operated and designed to main-tain a predetermined minimum inlet pressure. They are available in a “S” version for gas defrost applications. For information on other refrigerant applications please contact ALCO’s Applications Engineering Department.
FEATURES
• Energy efficient as it uses high side pressure for pilot operation, which minimizes system pressure drop.
• 25 lb. system pressure differential needed for valve operation.
• Uses copper line connections allowing installation with phos-copper alloy, i.e.: no flux.
• Can be installed without disassembly.
• Has a wide adjustment range (0-110 psig).
• Pilot connection available in 1/4-in. SAE or ODF.
• Easily disassembled to allow easy serviceability.
• Available with suction stop feature using a take-apart solenoid for additional serviceability.
• May be installed in either a vertical or horizontal refrigeration line.
• Pressure tap on inlet connection.
• External leak tested to less than 1/10 oz. a year.
• Corrosion resistant to 1000 hour salt spray.
• Reduced discharge to suction bleed.
SPECIFICATIONS
Maximum Working Pressure: 450 psig (3100 KPa).MOPD: 350 psi (2412 KPa) “S” version.Maximum Temperature: 250° F (121° C).
“S” version for use with DMG, AMG or AMC coils only.
pg592B
EPRB(S) REPLACEMENT PARTS
When 1/4″″″″ ODF pilot repair kits are needed, the followingrepair kits should be ordered:
EPRB Pilot Assembly KR50071EPRB(S) Pilot Assembly KR 50067
PRESSURE REGULATORSALCO ESR ELECTRONIC STEPPER REGULATORThe ESR is a direct driven suction regulator that uses a linear actu-ating bi-polar stepper motor to move the piston. The stepper motor is actuated by a voltage pulse to energize each of the motor phases and move the piston in discrete .001 inch increments. In individual cases, the ESR, along with appropriate control electronics, pro-vides state-of-the-art temperature control within less that ± 1° F of the desired setpoint temperature. The ESR is compatible with many control electronics widely available in the market today. Applications for the ESR include case control, line-up and rack mounted control, as well as transportation applications on refrigerated trucks, trailers and containers.
ESR 12120 T 7/11 12/24 V NCELECTRIC POINT DIAMETER CONNECTION CONNECTION SIZE 12 VOLT/ NO EXTERNALSTEPPER IN 1/16″″″″ INCREMENTS T = ODF IN 1/8″″″″ INCREMENTS 24 VOLT CONNECTOR
Alco Controls provides a hand-held stepper driver to allow the user to verify the Alco ESR (or ESV) responds properly to known driver com-mands. Compact and easy to use, the MTB-1 and a common multi-meter are the only tools required to completely troubleshoot any Alco electroni-cally driven product.
pg595E
ESR 12
pg595B
ESR 20
pg595C
SPECIFICATIONS
Operating temperatures:- Ambient: -40° F to 150° F- Refrigerant: -40° F to 140° F
Maximum working pressure: 500 psiLinear actuating bi-polar stepper motorDirect drive with no hysteresisTwo motors availableStep rate: 50 ± 10 steps per second
- 12 VDC- 24 VDC
Steps full travel:- 500 steps (ESR 12)- 800 steps (ESR 20) of rated voltage
Voltage tolerance: +10% and -15%.001 inch of linear travel per stepResistance (each phase): 29 ohms± 10% (12 V) or 116 ohms ± 10% (24 V)
A8AS/A81S/A82S Control inlet pressure with electric shutoff (defrost) • Evaporator pressure regulatorA8AB/A81B/A82B Control inlet pressure with wide opening (bypass) • Evaporator pressure regulator
Available Port Sizes: 3/8″, 5/8″, 7/8″, 1-1/8″,. 1-3/8″, 1-5/8″, 2-1/8″, 2-5/8″Available Connection Sizes: 7/8″, 1-1/8″, 1-3/8″, 1-5/8″, 2-1/8″, 2-5/8″
Selection ProcedureThis brochure has been developed for easy sizing and selection of the (S)PORT valve. Valve operation and parts information is available in the (S)PORT product Bulletin 26-01.
Selecting the proper port size EPR valve is relatively easy when using the capacity tables. Certain basic information must be known and some specific steps should be followed to ensure accurate port size selection. The following guidelines have been provided to help make the selection process simple.
DANFOSS EVAPORATOR PRESSURE REGULATORSINTRODUCTIONKVP evaporator pressure regulators are mounted in the suction line of refrigeration and air conditioning systems.
They are used to maintain a constant pressure corresponding to a constant temperature on the evaporator.
They also protect against too low an evaporating pressure by throttling down when pressure falls below the set value.
They are also used to differentiate the evaporating pressures in two or more evaporators in systems with one compressor.
FEATURES• Accurate, adjustable pressure regulation.• Wide capacity and operating range.• Pulsation damping design.• Stainless steel bellows.• Compact angle design for easy installation in any position.• “Hermetic" brazed construction.• 1/4 in. Schrader valve for pressure testing.• Available with flare and ODF solder connections.• For use with CFC, HCFC and HFC refrigerants.
APPROVALSUL listed, file SA7200.
CSA approved.
TECHNICAL DATA
Refrigerants: CFC, HCFC, HFC
Regulation range: 0 to 80 psigFactory setting = 29 psig
Maximum working pressure: MWP = 200 psig
Maximum test pressure: KVP 12 to 22: p′ = 410 psigKVP 28 to 35: p′ = 370 psig
Maximum temperature of medium: 212° F*
Minimum temperature of medium: – 40° F*
P band (full valve stroke): KVP 12 to 22 = 26 psiKVP 28 to 35 = 40 psi
*If the Schrader valve cone is removed and the connector is sealed with cap and nut, the maximum temperature is 300° F and the minimum temperature is – 330° F.
P4311A
P4311
763
EVAPORATOR PRESSURE REGULATORS
DANFOSS EVAPORATOR PRESSURE REGULATORSORDERING
*Rated capacity is based on:Evaporating temperature te = 40° FCondensing temperature tc = 100° FPressure drop across regulator ∆p = 2 psiOffset (design evaporating pressure minus minimum allowable evaporator pressure) = 9 psi.
†KVP supplied without flare nuts. Separate flare nuts can be supplied:1/2 in., code no. 011L11035/8 in., code no. 011L1167
NOTE: The connection dimensions chosen must not be too small, as gas velocities in excess of130 ft/s at the inlet of the regulator can result in flow noise.
CAPACITY
*The capacities are based on:
Liquid temperature ahead of expansion valve tl = 100° FRegulator offset ∆p = 9 psi
DANFOSS CONDENSER PRESSURE REGULATORSINTRODUCTIONKVR condenser regulators can be mounted in either the gas or liquid side of the condenser in refrigeration and air conditioning systems. They are used to maintain a constant and sufficiently high condensing pressure with systems using air-cooled condensers.
They can also be used with valve types NRD or KVD to assure that adequate pressure is maintained on the receiver.
*Rated capacity is based on:Suction gas temperature ts = 10° FLiquid temperature tl = 100° FOffset ∆∆∆∆p = 10 psi
†KVC are delivered without flare nuts. Separate flare nuts can be sup-plied: 1/2 in. code no. 011L1103; 5/8 in. code no. 011L1167.
NOTE: The connection dimensions chosen must not be too small, as gas velocities in excess of 130 ft/s at the inlet of the regulator can result in flow noise.
If the temperature in the discharge gas line is too high according to the compressor specifications, it is recommended to install a liquid injection valve in a bypass from the liquid line to the suction line.
INTRODUCTIONKVC capacity regulators are used to adapt compressor capacity to actual evaporator load by supplying a replacement capacity in form of hot/cool gas.
It is installed in a bypass line between the high and low pressure sides of the refrigeration system and is designed for direct gas injection into the suction line.
• Available with flare and ODF solder connections.
• For CFC, HCFC and HFC refrigerants.
APPROVALSUL listed, file SA7200.CSA approved.
TECHNICAL DATARefrigerants: CFC, HCFC, HFC
Regulation range: 3 to 85 psigFactory setting = 29 psig
Maximum working pressure: MWP = 400 psig
Maximum test pressure: p' = 450 psig
Maximum temperature of medium: 300° F
Minimum temperature of medium: – 40° F
Maximum P-band: 29 psi
P4313
P4313A
P4313B
770
HOT GAS BYPASS CAPACITY REGULATORS
DANFOSS HOT GAS BYPASS CAPACITY REGULATORSREPLACEMENT CAPACITY
*The capacities are based on: Liquid temperature ahead of the expansion valve tl = 100 °F.
Correction factors for liquid temperature tlWhen liquid temperature tl ahead of the evaporator is other than 100° F, adjust the table capacities bymultiplying them by the appropriate correction factor found in the following table.
System capacity x correction factor = table capacity.
Maximum Regulator Capacity Qe*
TYPE OFFSET∆∆∆∆p psi
REGULATOR CAPACITY Q TONS SUCTION GAS TEMPERATURE ts AFTER PRESSURE/TEMPERATURE REDUCTION °F
DANFOSS HOT GAS BYPASS REGULATORSREPLACEMENT CAPACITY
*The capacities are based on: Liquid temperature ahead of the expansion valvetl = 100 °F.
Correction factors for liquid temperature tlWhen liquid temperature tl ahead of the evaporator is other than 100° F, adjust the table capacities by multiplying them by the appropriate correction factor found in the following table.
System capacity x correction factor = table capacity.
Maximum Regulator Capacity Qe*
TYPE OFFSET∆∆∆∆p psi
REGULATOR CAPACITY Q TONS SUCTION GAS TEMPERATURE ts AFTER PRESSURE/TEMPERATURE REDUCTION °F–50 –40 –25 –10 10 30 50
SIZINGFor optimum performance, it is important to select a KVC valve according to system conditions and application.
The following data must be used when sizing a KVC valve:• Refrigerant: CFC, HCFC or HFC.• Suction temperature at maximum compressor/evaporator load
ts in °F/psig.
• Minimum suction temperature ts in °F/psig.• Compressor capacity in tons.• Evaporating load in tons.• Liquid temperature ahead of expansion valve tl in °F.• Connection type flare or solder.• Connection size in inches.
772
CRANKCASE PRESSURE REGULATORS
DANFOSS CRANKCASE PRESSURE REGULATORS
P4314A
P4314
INTRODUCTIONKVL crankcase pressure regulators are used to protect the com-pressor motor against overload experienced during startup after long off periods or just after defrost periods.
They are installed in the suction line of refrigeration systems.