Carrier 17DA Start-up, Operation And Maintenance Instructions Manual

Also see for 17DA: Start-up instructions Application data Operating and maintenance instructions Start-up instructions

124. Start the pumpout compressor (control switch at ONposition).5. Operate pumpout compressor until suction gage readshighest sustained vacuum (about 28 in. Hg VAC or 1psia [6.9 kPa]).6. Close valve 8.7. Stop compressor (control switch at OFF position).REMOVE AIR AFTER OPENING CHILLER TO ATMO-SPHERE (Refrigerant Charge in Storage Tank) — Performthe following procedure. See Fig. 4 for valve numbers.1. Place the control switch in the OFF position.2. Close valves 2, 4, 5, 9, 10, 11 and 13.3. Open valves 1, 3, 6, 7, 8, and 12.4. Start pumpout compressor by putting control switch inthe ON position.5. Operate pumpout compressor until suction gage readshighest sustained vacuum (about 28 in. hg or 1 psia[6.9 kPa]).6. Close valve 8.7. Stop compressor by placing the control switch in the OFFposition.TRANSFER REFRIGERANT CHARGE (From StorageTank to Machine) — Perform the following procedure. SeeFig. 4 for valve numbers.1. Place control switch in OFF position.2. Operate cooler water pump and ensure that there is waterflow through the cooler.3. Close valves 2, 4, 5, 6, 7, 8, 9, 10, and 11.4. Open valves 1, 3, 12, and 13.5. Slowly open valve 5 and allow refrigerant vapor into thechiller until chiller pressure increases to 35 psig (141 kPa)for R-134a. Feed refrigerant slowly to avoid freeze-up.6. Close valve 5.7. Start the pumpout compressor (control switch in theAUTO position).8. When the cooler pressure is lower than storage tank pres-sure, open valve 11 and refrigerant will flow from thestorage tank to the machine.9. Shut valve 11 when refrigerant level reaches the chargelevel mark on the cooler sight glass.10. Turn off the pumpout compressor (control switch in theOFF position).11. Close valves 3, 4, and 12.TRANSFER REFRIGERANT CHARGE (From Machineto Storage Tank Located Below Machine) — Perform thefollowing procedure. See Fig. 4 for valve numbers.1. Vent storage tank to machine by opening valves 1, 2, 4,and 12.2. Open valves 11 and drain liquid from the cooler.3. Operate the cooler water pump.4. Open valves 3, 6, 7, and 9.5. Close valves 2, 4, 5, 10 ,11, and 13.6. Run cooling water through the pumpout condenser.7. Operate the pumpout compressor (control switch in theON position).8. At 25 in. Hg VAC (2.5 psia, 17.21 kPa) in cooler, stop thepumpout compressor. Close all valves and shut offpumps.TRANSFER REFRIGERANT CHARGE (From Machineto Storage Tank Located Above or Level with Machine) —Perform the following procedure. See Fig. 4 for valvenumbers.1. Operate the cooler and machine condenser water pumps.2. Open valves 1, 2, 5, 6, 7, and 12.3. Close valves 3, 4, 8, 9, 10 ,11, and 13.4. Operate the pumpout compressor (control switch in theON position).5. When the storage tank pressure is less than machine pres-sure, open valve 11.6. After the liquid has been transferred, stop the pumpoutcompressor and the condenser water pump.Continue to operate the cooler water pump.7. Open valves 3, 6, 7 and 9.8. Close valves 2, 4, 5, 10, 11, and 13.9. Run cooling water through the pumpout condenser.10. Operate the pumpout compressor (control switch in theON position).11. At 25 in. Hg VAC (2.5 psia, 17.21 kPa) in cooler, stop thepumpout compressor. Close all valves and shut offpumps.PRESSURIZE MACHINE AND STORAGE TANK (NoRefrigerant in System) — Perform the following procedure.See Fig. 4 for valve numbers.1. Open valves 3, 4, 6, 7, 9, 11, and 13.2. Close valves 1, 2, 5, 8, 10 , and 12.3. Operate the pumpout compressor (control switch in theON position) until desired pressure is reached. Do not ex-ceed design pressure of vessels.4. Stop the pumpout compressor (control switch in the OFFposition).5. Close valve 13.DISTILL REFRIGERANT CHARGE — Water, oil, and im-purities can be removed from the refrigerant while transferringthe charge from storage tank to machine. Perform the follow-ing procedure. See Fig. 4 for valve numbers.1. Operate the cooler and machine condenser water pumps.Valve 1 2 3 4 5 6 7 8 9 10 11 12 13Condition O C O C C O O O C C C O CValve 1 2 3 4 5 6 7 8 9 10 11 12 13Condition O C O C C C C C C C C O OCAUTIONFollow steps 5 and 6 carefully to prevent damage from afreeze-up.Valve 1 2 3 4 5 6 7 8 9 10 11 12 13Condition O O C O C C C C C C O O CValve 1 2 3 4 5 6 7 8 9 10 11 12 13Condition O C O C C O O C O C C O CValve 1 2 3 4 5 6 7 8 9 10 11 12 13Condition O O C C O O O C C C C O CValve 1 2 3 4 5 6 7 8 9 10 11 12 13Condition O C O C C O O C O C C O CValve 1 2 3 4 5 6 7 8 9 10 11 12 13Condition C C O O C O O C O C O C OWARNINGDo not use refrigerant or air for leak testing. Personalinjury could result. Only use nitrogen for leak testing.