Heatcraft Refrigeration Products H-IM-72A Manual de usuario

1H-IM-72B October 1999 Part No. 25000102HEATCRAFT INC. REFRIGERATION PRODUCTS DIVISION2175 WEST PARK PLACE BLVD., STONE MOUNTAIN, GA 30087 • 770-46

10Table 3. Equivalent Feet of Pipe(Due to Valve and Fitting Friction)Copper Tube,O.D., Type "L"1/25/87/8 11/8 13/8 15/8 21/8 25/8 31/8 35/

11Table 4. Weight of Refrigerants in Copper Lines During Operation (Pounds per 100 Lineal feet of type "L" tubing.)Line Size S

12 Table 5A. Recommended Line Sizes for R-404A and R507 * SUCTION LINE SIZESUCTION TEMPERATURESYSTEM +20˚F +10˚F-10˚F-20˚FCAP

13Table 5B. Recommended Line Sizes for R-404A and R507 (continued) * SUCTION LINE SIZE LIQUID LINE SIZE SUCTION TEMPERATURE Rece

14Table 6A. Recommended Line Sizes for R-22 * SUCTION LINE SIZESUCTION TEMPERATURESYSTEM +40˚F +20˚F +10˚F0˚FCAPACITY Equival

15Table 6B. Recommended Line Sizes for R-22 (continued) * SUCTION LINE SIZE LIQUID LINE SIZE SUCTION TEMPERATURE Receiver to0˚F

163,0006,0009,00012,00018,00024,00036,00048,00060,000Table 7. Recommended Remote Condenser Line Sizes R-12 & R-134a

17Leak Checking, Evacuation,and Start-upWarning: It is illegal to knowingly vent or dischargeany CFC’s and HCFC’s to the atmosphere. ALLCFC’s and H

18Refrigerant DistributionThe distribution system is selected based upon the type ofdefrost for that particular system. For each set of liquid /suctio

19Electronic control systemThe electronic controller has become the standard on parallelcompressor systems. The increased capabilities of thecontrolle

2© Heatcraft 1999Table of ContentsIntroductionInspectionUnit DesignationModel Definition ...

20Table 11. Oil Safety Switch Pressure AlarmCopeland MFGRS. Model No. Diff. Psi (bar) CircuitPart No. Cut-I

21Table 12. Oil ChargesModel Standard Deep SumpFamily Initial (oz) Recharge (oz) Initia

22Table 14. Oil Safety Switch PressureCarlyle Danfoss Time Diff. Psi (bar)Part No. Part No. Delay Cut-In

23Sight Glass & MoistureIndicatorThe sight glass/moisture indicator helps determine that a unithas sufficient refrigerant charge and/or when the l

24Table 17. Henry Relief Valve Capacity RatingsPounds of Air per Minute for all Refrigerants Except Ammonia R717TYPE CATALOG SIZ

25Series P100 PressureControlThe P100 series, manufactured by Johnson Control, Inc., areencapsulated, non adjustable, single-pole single throw, direct

26Module Replacement1. Disconnect power at the fuse box.2. Remove wiring box from the retainer.3. Remove the IRR 4000-93 Ring with an IRR P-101or equi

27Before the oil separator is installed, an initial charge of oilmust be added to it. This initial charge of oil is the amountthat is needed to just

28Table 22. A C & R Model RegulatorsA C & R CONNECTION OPERATION OIL LEVEL,MODEL SIZE PRESSURE SIGHTNO. DIFF, psig GLASSS-9010 3 BOLT 5 - 30

29Suction FilterReplaceable core suction filters are supplied as standard onall units. The flanged shell holds replaceable pleated filterelements sui

3HEATCRAFT INC.Parallel Compressor UnitsINTRODUCTIONParallel Compressor systems are central refrigeration unitsemploying 2 to 8 parallel piped compres

30Superior Valve CompanyReplaceable Suction Filter• On many parallel systems, the Superior Valve Co.suction filter is installed.Table 25. Type F Filt

31Liquid Drain Control MethodThis method is ideal for large capacity systems since asmaller regulator is required for liquid line than for dischargeli

32Adjusting these valves can be complicated because the loadmust be varied during the setting procedure and it is difficultto determine exactly when t

33General Maintenance Schedule(Service/Maintenance should be performed only by aqualified / certified refrigeration service technician.)Weekly• Check

34SERVICE DIAGNOSIS CHARTSymptom Cause RemedyCompressor 1. Motor Line open. 1. Close starter or disconnect

35Symptom Cause RemedyLow 1. Insufficient refrigerant in system 1. Check for leaks. Repair and add charged

36SERVICE RECORDA permanent data sheet should be prepared on each installation, with a copy for the owner and the original for the installingcontracto

4Figure 2. Vibration Pad LocationsSYSTEM WARRANTYThis equipment is designed to operate properly and producethe rated capacity when installed in accor

5LOCATION OF EQUIPMENT - OUTDOOR• The mounting platform or base should be level and locatedso as to permit free access of supply air.• Units must not

6UNIT ACCESSAlways provide sufficient clearance for unit maintenance andservice. Minimum clearances for most situations aredescribed below (except 60

7 Ventilation RequirementsINDOOR UNITSIf compressors or condensing units are located in a machineroom, adequate ventilation air must be provided to av

8• When brazing refrigerant lines, an inert gasshould be passed through the line at lowpressure to prevent scaling and oxidationinside the tubing. Dr

9In order to compensate for the expansion of the tubing, it isnecessary to estimate the amount of expansion and thenprovide offsets or loops in the re