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Parallel Compressor Systems Installation & Operations Manual, October 2004  

15

Parallel Compressor Systems

Suction Line Size

Liquid Line Size

System

Capacity

BTU/H

Suction Temperature

Receiver to

Expansion Valve

Equivalent Lengths

0˚F

Lengths

-10˚F

Equivalent Lengths

 -20˚F

Equivalent  Lengths

100’ 150’ 200’ 25’ 50’ 75’ 100’ 150’ 200’ 25’ 50’ 75’ 100’ 150’ 200’ 25’ 50’ 75’ 100’ 150’ 200’

3/8

1/2

1/2

3/8

3/8

3/8

3/8

1/2

1/2

3/8

3/8

3/8

1/2

1/2

1/2

3/8

3/8

3/8

3/8

3/8

3/8

1,000

5/8

5/8

5/8

1/2

1/2

1/2

5/8

5/8

5/8

1/2

1/2

5/8

5/8

5/8

7/8

3/8

3/8

3/8

3/8

3/8

3/8

3,000

5/8

5/8

7/8

1/2

1/2

5/8

5/8

5/8

7/8

1/2

5/8

5/8

5/8

7/8

7/8

3/8

3/8

3/8

3/8

3/8

3/8

4,000

5/8

7/8

7/8

1/2

5/8

5/8

7/8

7/8

7/8

5/8

5/8

7/8

7/8

7/8

7/8

3/8

3/8

3/8

3/8

3/8

3/8

6,000

7/8

7/8

7/8

5/8

7/8

7/8

7/8

7/8

7/8

5/8

7/8

7/8

7/8 1-1/8 1-1/8 3/8

3/8

3/8

3/8

3/8

3/8

9,000

7/8

7/8 1-1/8

7/8

7/8

7/8

7/8 1-1/8 1-1/8 7/8

7/8

7/8

1-1/8

1-1/8 1-1/8 3/8

3/8

3/8

3/8

3/8

3/8

12,000

7/8 1-1/8

1-1/8

7/8

7/8

7/8

1-1/8

1-1/8 1-1/8 7/8

7/8

1-1/8

1-1/8 1-1/8 1-1/8 3/8

3/8

3/8

3/8

3/8

1/2

15,000

1-1/8 1-1/8 1-1/8 7/8

7/8

1-1/8

1-1/8 1-1/8 1-1/8 7/8

1-1/8

1-1/8 1-1/8 1-1/8 1-3/8 3/8

3/8

3/8

3/8

1/2

1/2

18,000

1-1/8 1-1/8

1-3/8

7/8 1-1/8 1-1/8 1-1/8

1-3/8

1-3/8 7/8 1-1/8 1-1/8

1-3/8

1-3/8 1-3/8 3/8

3/8

1/2

1/2

1/2

1/2

24,000

1-1/8

1-3/8

1-3/8 7/8 1-1/8 1-1/8

1-3/8

1-3/8 1-3/8 1-1/8 1-1/8 1-3/8 1-3/8 1-3/8

1-5/8

3/8

3/8

1/2

1/2

1/2

1/2

30,000

1-3/8

1-3/8 1-3/8 1-1/8 1-1/8 1-3/8 1-3/8 1-3/8

1-5/8

1-1/8 1-3/8 1-3/8 1-3/8

1-5/8

1-5/8 3/8

1/2

1/2

1/2

1/2

1/2

36,000

1-3/8 1-3/8

1-5/8

1-1/8 1-1/8 1-3/8 1-3/8

1-5/8

1-5/8 1-1/8 1-3/8 1-3/8

1-5/8

1-5/8 1-5/8 3/8

1/2

1/2

1/2

1/2

5/8

42,000

1-3/8

1-5/8

1-5/8 1-1/8 1-3/8 1-3/8 1-3/8

1-5/8

1-5/8 1-1/8 1-3/8 1-3/8

1-5/8

1-5/8 2-1/8 1/2

1/2

1/2

1/2

1/2

5/8

48,000

1-3/8

1-5/8

1-5/8 1-1/8 1-3/8 1-3/8

1-5/8

1-5/8 1-5/8 1-3/8 1-3/8

1-5/8

1-5/8 2-1/8 2-1/8 1/2

1/2

1/2

1/2

5/8

5/8

54,000

1-5/8

1-5/8 2-1/8 1-1/8 1-3/8 1-3/8

1-5/8

1-5/8 2-1/8 1-3/8 1-3/8 1-5/8 1-5/8

2-1/8

2-1/8 1/2

1/2

1/2

5/8

5/8

5/8

60,000

1-5/8 1-5/8 2-1/8 1-3/8 1-3/8 1-5/8 1-5/8 1-5/8

2-1/8

1-3/8 1-5/8 1-5/8 1-5/8

2-1/8

2-1/8 1/2

1/2

5/8

5/8

5/8

5/8

66,000

1-5/8

2-1/8

2-1/8 1-3/8 1-3/8 1-5/8 1-5/8

2-1/8

2-1/8 1-3/8 1-5/8 1-5/8

2-1/8

2-1/8 2-1/8 1/2

1/2

5/8

5/8

5/8

5/8

72,000

1-5/8

2-1/8

2-1/8 1-3/8 1-5/8 1-5/8 1-5/8

2-1/8

2-1/8 1-3/8 1-5/8 1-5/8

2-1/8

2-1/8 2-1/8 1/2

1/2

5/8

5/8

5/8

7/8

78,000

1-5/8

2-1/8

2-1/8 1-3/8 1-5/8 1-5/8

2-1/8

2-1/8 2-1/8 1-3/8 1-5/8

2-1/8

2-1/8 2-1/8 2-1/8 1/2

5/8

5/8

5/8

5/8

7/8

84,000

2-1/8

2-1/8 2-1/8 1-3/8 1-5/8 1-5/8

2-1/8

2-1/8 2-1/8 1-3/8 1-5/8

2-1/8

2-1/8 2-1/8 2-1/8 1/2

5/8

5/8

5/8

7/8

7/8

90,000

2-1/8 2-1/8 2-1/8 1-5/8 1-5/8 2-1/8 2-1/8 2-1/8

2-5/8

1-5/8 2-1/8 2-1/8 2-1/8

2-5/8

2-5/8 5/8

5/8

5/8

7/8

7/8

7/8

120,000

2-1/8

2-5/8

2-5/8 1-5/8 2-1/8 2-1/8 2-1/8

2-5/8

2-5/8 2-1/8 2-1/8 2-1/8

2-5/8

2-5/8 2-5/8 5/8

7/8

7/8

7/8

7/8

7/8

150,000

2-1/8

2-5/8

2-5/8 1-5/8 2-1/8 2-1/8

2-5/8

2-5/8 2-5/8 2-1/8 2-1/8 2-5/8 2-5/8 2-5/8

3-1/8

5/8

7/8

7/8

7/8

7/8 1-1/8

180,000

2-5/8

2-5/8 2-5/8 2-1/8 2-1/8 2-5/8

2-5/8

2-5/8 2-5/8 2-1/8 2-5/8 2-5/8 2-5/8

3-1/8

3-1/8 7/8

7/8

7/8

7/8

7/8 1-1/8

210,000

2-5/8 2-5/8

3-1/8

2-1/8 2-1/8 2-5/8 2-5/8 2-5/8

3-1/8

2-1/8 2-5/8 2-5/8 2-5/8

3-1/8

3-1/8 7/8

7/8

7/8

7/8 1-1/8 1-1/8

240,000

2-5/8

3-1/8

3-1/8 2-1/8 2-5/8 2-5/8 2-5/8 3-1/8

3-1/8

2-1/8 2-5/8 3-1/8 3-1/8 3-1/8

3-5/8

7/8

7/8 1-1/8 1-1/8 1-1/8 1-1/8

300,000

3-1/8

3-1/8 3-1/8 2-1/8 2-5/8 2-5/8 3-1/8 3-1/8

3-5/8

2-5/8 2-5/8 3-1/8 3-1/8

3-5/8

3-5/8 7/8

7/8 1-1/8 1-1/8 1-1/8 1-1/8

360,000

3-1/8

3-5/8

3-5/8 2-5/8 3-1/8 3-1/8 3-1/8

3-5/8

3-5/8 2-5/8 3-1/8 3-5/8 3-5/8 3-5/8

4-1/8

1-1/8 1-1/8 1-1/8 1-1/8 1-3/8 1-3/8

480,000

3-5/8 3-5/8

4-1/8

2-5/8 3-1/8 3-1/8

3-5/8

3-5/8 4-1/8 3-1/8 3-1/8 3-5/8 3-5/8

4-1/8

4-1/8 1-1/8 1-1/8 1-1/8 1-3/8 1-3/8 1-3/8

600,000

4-1/8

4-1/8

5-1/8 3-1/8 3-5/8 4-1/8 4-1/8

5-1/8

5-1/8 3-5/8 4-1/8 4-1/8 5-1/8 5-1/8

5-1/8

1-1/8 1-1/8 1-3/8 1-3/8 1-3/8 1-5/8

720,000

4-1/8 5-1/8

5-1/8

3-5/8 4-1/8 4-1/8

5-1/8

5-1/8 5-1/8 3-5/8 4-1/8 5-1/8 5-1/8

5-1/8

6-1/8 1-1/8 1-3/8 1-3/8 1-5/8 1-5/8 1-5/8

900,000

* NOTES:

1.  Sizes that are highlighted indicate maximum suction line sizes that should be 

used for risers. Riser size should not exceed horizontal size. Properly placed 

suction traps must also be used for adequate oil return. All sizes shown are for 

OD Type L copper tubing

2.  Suction line sizes selected at pressure drop equivalent to 2˚F. Reduce estimate 

of system capacity accordingly

3.  Recommended liquid line size may increase with reverse cycle hot  

gas systems

4.  If system load drops below 40% of design, consideration to installing double 

suction risers should be made

Table 6B. Recommended Line Sizes for R-22 (continued)*

Содержание H-IM-PCS

Страница 1: ...Parallel Compressor Systems Bulletin No H IM PCS October 2004 Part Number 25000102 Replaces H IM 72B October 2004 Installation and Operation Manual...

Страница 2: ...peland Lubricants Carlyle Compressors Approved Carlyle Lubricants Oil Pressure Table 13 O6D E Oil Pressure History Table 14 Oil Safety Switch 22 Table 15 Part Load Performance Multipliers Table 16 Req...

Страница 3: ...tive and the carrier of the damage immediately Request an immediate joint inspection with the carrier Do not repair the unit until inspected by carrier s representative Care should be exercised when u...

Страница 4: ...es at the rear and 42 inches in the front of panel or as required by National or Local Codes For parallel system units placed end to end 24 inches between units is suggested Floor Foundation Requireme...

Страница 5: ...e ground level provides some protection from ground water and wind blown matter The concrete slab should be isolated from the building structure Finally before tightening mounting bolts recheck the le...

Страница 6: ...whenever possible Care should be taken to see that ample room is left for maintenance work through access doors and panels When the unit is in an area where it is enclosed by three walls the unit mus...

Страница 7: ...ment Before starting up a parallel unit insure that all fuses and motor protective devices are in place and that all wiring is secure A complete wiring diagram for troubleshooting the unit will be fou...

Страница 8: ...ed a maximum of 2 feet in each direction Pipingattachedtoavibratingobject suchasacompressor or compressor base must be supported in such a manner that will not restrict the movement of the vibrating o...

Страница 9: ...ially on hot gas lines to prevent line breakage This is critical on long straight runs of generally 70 or more where expansion loops must be provided and hangers should allow for longitudinal movement...

Страница 10: ...04A R 507 4 1 1 1 6 1 1 6 8 2 2 1 10 2 2 7 12 2 3 3 16 3 4 1 20 4 5 6 30 6 8 3 40 8 11 8 Table 2 Pressure Loss of Liquid Refrigerants In Liquid Line Risers Expressed in Pressure Drop PSIG and Subcooli...

Страница 11: ...2 57 3 50 4 98 14 27 40 26 42 58 40 64 95 61 93 1 32 1 91 1 33 1 87 1 5 8 12 134A 22 R 507 502 404A 90 9 90 0 78 0 3 65 4 96 7 07 20 37 56 37 59 82 57 90 1 35 87 1 33 1 86 1 30 1 88 2 64 2 1 8 12 134...

Страница 12: ...8 2 1 8 1 3 8 1 3 8 1 5 8 1 5 8 1 5 8 2 1 8 1 3 8 1 5 8 1 5 8 1 5 8 1 5 8 2 1 8 1 5 8 1 5 8 1 5 8 84 000 1 1 8 1 3 8 1 5 8 1 5 8 1 5 8 2 1 8 1 3 8 1 3 8 1 5 8 1 5 8 2 1 8 2 1 8 1 3 8 1 5 8 1 5 8 1 5 8...

Страница 13: ...8 5 8 5 8 72 000 1 5 8 2 1 8 2 1 8 1 5 8 1 5 8 1 5 8 1 5 8 2 1 8 2 1 8 1 5 8 1 5 8 1 5 8 1 5 8 2 1 8 2 1 8 5 8 5 8 5 8 5 8 5 8 7 8 78 000 2 1 8 2 1 8 2 1 8 1 5 8 1 5 8 1 5 8 2 1 8 2 1 8 2 1 8 1 5 8 1...

Страница 14: ...1 5 8 1 5 8 1 1 8 1 3 8 1 5 8 1 5 8 1 5 8 2 1 8 1 3 8 1 3 8 1 5 8 84 000 1 1 8 1 1 8 1 3 8 1 3 8 1 3 8 1 5 8 1 1 8 1 3 8 1 3 8 1 3 8 1 5 8 1 5 8 1 3 8 1 3 8 1 5 8 1 5 8 1 5 8 2 1 8 1 3 8 1 5 8 1 5 8...

Страница 15: ...5 8 5 8 72 000 1 5 8 2 1 8 2 1 8 1 3 8 1 5 8 1 5 8 1 5 8 2 1 8 2 1 8 1 3 8 1 5 8 1 5 8 2 1 8 2 1 8 2 1 8 1 2 1 2 5 8 5 8 5 8 7 8 78 000 1 5 8 2 1 8 2 1 8 1 3 8 1 5 8 1 5 8 2 1 8 2 1 8 2 1 8 1 3 8 1 5...

Страница 16: ...1 8 1 3 8 1 1 8 1 1 8 180 000 50 100 1 5 8 2 1 8 1 3 8 1 3 8 1 3 8 1 3 8 1 3 8 1 3 8 1 3 8 1 5 8 1 3 8 1 3 8 1 3 8 1 5 8 1 3 8 1 3 8 240 000 50 100 1 5 8 2 1 8 1 5 8 1 5 8 1 5 8 1 5 8 1 3 8 1 3 8 1 5...

Страница 17: ...e pull down The wiring diagramfortheunitwillhavetobeconsultedtodetermine how to best force the fans to operate for this step 4 With all compressor and control breakers and toggle switches turned off a...

Страница 18: ...eturned into the liquid manifold the Priority I design returns the liquid to the condenser through a liquid drain manifold Hot discharge gas is injected into the suction line at the parallel rack and...

Страница 19: ...igerant being returned to the compressor This will cause dilution of the oil and eventual failure of the bearings and piston rings In extreme cases the compressor will fail as a result of the diluted...

Страница 20: ...est The compressors are solid mounted to a base frame or mounted on the refrigerant receiver All reciprocating compressors incorporate oil floats Crankcase heaters will be installed and wired Cylinder...

Страница 21: ...1 24 to 1 8 18 to 34 1 24 to 2 3 Carlyle Compressors Approved Carlyle Lubricants For CFC and HCFC Refrigerants Use Totaline 150 Suniso 3GS Shrieve Zerol 150 Texaco WFI 32 150 IGI Petroleum Cryol 150...

Страница 22: ...eactivated after a specified trip delay The output relay reactivates after power line conditions return to an acceptable level for a specified amount of time Restart Delay The trip delay prevents nuis...

Страница 23: ...Vessel is exposed to excessive heat When a Vessel containing liquid refrigerant is shut off from otherpartsofthesystemariseintemperaturewillcausearisein pressure If theVessel is completely filled wit...

Страница 24: ...let 350 400 425 450 Angle 526E 3 8 MPT 3 8 FLARE 10 2 11 6 12 3 13 0 527E 1 2 MPT 5 8 FLARE 28 5 32 4 34 4 36 3 Straight Through 5231 3 8 MPT 3 8 FLARE 11 2 12 7 13 5 14 3 5231 A 3 8 MPT 1 2 FLARE 18...

Страница 25: ...cannot be reset until the pressure drops to a predetermined level The latching mechanism inside the manual reset model is trip free The electrical contacts will cutout even if the reset button is hel...

Страница 26: ...d to insure the system will work properly Low Pressure Oil System This type system is normally used for parallel compressors and uses three basic components Oil Separator Oil Reservoir and Oil Level R...

Страница 27: ...pressure expansion valve with a range of 0 to 90 psig Temprite Part No is 67070000 An alternative valve manufactured by Sporlan is Model ADRI 11 4 0 90 Oil Level Regulators The AC R adjustable oil re...

Страница 28: ...n the motor cavity on semi hermetic models the compressor will overfill The oil line sight glass is a good way to see how the separator is working Look for movement in the glass If the separator is no...

Страница 29: ...strainers and filter driers 3 Install a replacement compressor and make a complete electrical check 4 Make sure the suction line adjacent to the compressor is clean Install a liquid line filter drier...

Страница 30: ...r pressure The regulator closes as the condenser pressure drops below the set point thus back flooding the condenser and reducing the inside surface area available for condensing Valve B is and Outlet...

Страница 31: ...utdoor temperature to allow the system pressures to drop below the regulator pressure settings Before adjusting make sure that all manual opening stems on the regulators are set for automatic operatio...

Страница 32: ...0psig withonecompleteturnequal toapproximately4psichange Adjustmentsshouldbemade insmallincrements allowingforthesystemtostabilizeafter each turn 6 Vary the evaporator load to test at various conditio...

Страница 33: ...connections Checkoperationandconditionofcontactsoncompressor fan motor contactors Check appearance of control panel interior Check appearance of exterior conduit junction boxes Check appearance of ins...

Страница 34: ...tor Check stator If leads are all right replace stator Eliminate cause of excessive pressure Check oil level Correct binding Unit Operates Long Or Continuously 1 2 3 4 5 6 Control contacts sticking in...

Страница 35: ...ters Check and reset for proper superheat Check means for regulating condensing temperature Check for proper sizing Little or No Oil Pressure 1 2 3 4 5 6 7 8 9 Clogged suction oil strainer Excessive l...

Страница 36: ..._ Group __________________ Group _________________ Compressor Model Serial No __________________ __________________ Group __________________ Compressor Model Serial No __________________ _____________...

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