Carrier 17 Start Up & Operation Manual

Contents

Transferring Refrigerant From Normal Opera-tion into the Utility Vessel — These steps describethe method of moving refrigerant from the cooler/condenser/compressor sections into the utility vessel. This is nor-mally performed for service work on the cooler, condenser,or the compressor components or for long-term machineshutdown.1. Isolate and push refrigerant into the utility vessel withthe pumpout compressor.a. Valve positions: (Blank spaces indicate open valves).VALVE 1 2 3 4 5 6 7 8 9 10 11CONDITION C C C C C Cb. Turn off the machine water pumps and pumpout con-denser water.c. Turn on pumpout compressor to push liquid out of thecooler/condenser/compressor section.d. When all liquid has been pushed into the utility ves-sel, close the cooler isolation valve 7.e. Access the Control Test, Pumpdown function on theLID display to turn on the machine water pumps andview the machine pressures.f. Turn off pumpout compressor.2. Evacuate refrigerant gas from the cooler/condenser/compressor vessel.a. Valve positions: close valves 2 and 5, open valves 3and 4.VALVE 1 2 3 4 5 6 7 8 9 10 11CONDITION C C C C C C Cb. Turn on pumpout condenser water.c. Run pumpout compressor until the suction reaches15 in. Hg (50 kPa abs). Monitor pressures on the LIDand on the refrigerant gages.d. Close valve 1.e. Turn off pumpout compressor.f. Close valves 3, 4, and 6. (All valves are now closed.)g. Turn off pumpout condenser water.h. Continue pumpdown function on the LID to turn offthe machine water pumps and to lock out the machinecompressor from operation.Transferring Refrigerant from Normal Opera-tion into the Cooler/Condenser/Compressor Sec-tion — These steps describe the method of moving refrig-erant from the utility vessel into the cooler/condenser/compressor section. This is normally performed for servicework on the utility vessel.1. Isolate and push refrigerant into the cooler/condenser/compressor section:a. Valve positions:VALVE 1 2 3 4 5 6 7 8 9 10 11CONDITION C C C C C Cb. Turn off machine water pumps and pumpout con-denser water.c. Turn on pumpout compressor to push refrigerant outof the utility vessel.d. When all liquid is out of the utility vessel, close coolerisolation valve 7.e. Turn off pumpout compressor.2. Evacuate refrigerant from the utility vessel.a. Access the Control Test, pumpout function on the LIDdisplay to turn on the machine water pumps and moni-tor vessel pressures.b. Valve positions: Close valves 3 and 4, open valves 2and 5.VALVE 1 2 3 4 5 6 7 8 9 10 11CONDITION C C C C C C Cc. Turn on pumpout condenser water.d. Run the pumpout compressor until the suction reaches15 in. Hg (50 kPa abs). Monitor pressures on the LIDand on refrigerant gages.e. Close valve 6.f. Turn off pumpout compressor.g. Close valves 1, 2, and 5 (all valves are now closed).h. Turn off pumpout condenser water.i. Continue pumpdown function on the LID to turn offmachine water pumps and lock out the machine com-pressor from operation.Return Refrigerant to Normal OperatingConditions1. Be sure that the vessel that was opened has been evacu-ated and dehydrated.2. Access the Control Test, terminate lockout function toview vessel pressures and to turn on machine water pumps.3. Open valves 1, 3, and 6.VALVE 1 2 3 4 5 6 7 8 9 10 11CONDITION C C C C C C C C4. Slowly open valve 5, gradually increasing pressurein the evacuated vessel to 35 psig (141 kPa) forHFC-134a. Feed refrigerant slowly to prevent freezeup.5. Perform leak test at 35 psig (141 kPa).6. Open valve 5 fully. Let vessel pressures equalize.VALVE 1 2 3 4 5 6 7 8 9 10 11CONDITION C C C C C C C7. Open valves 9 and 10.8. Open valve 7 to equalize liquid refrigerant levels.9. Close valves 1, 3, 5, and 6.VALVE 1 2 3 4 5 6 7 8 9 10 11CONDITION C C C C C C C C10. Continue on with the terminate lockout function on theLID to turn off water pumps and enable the compressorfor operation.66