Carrier AquaEdge 19XR Series Start-up, Operation And Maintenance Instructions Manual

Also see for AquaEdge 19XR series: Installation instructions Start-up, operation and maintenance instructions

Contents

44Transfer Refrigerant from Pumpout Storage Tank to Chiller1. Equalize refrigerant pressure.a. Turn on chiller water pumps and monitor chiller pressures.b. Close pumpout and storage tank valves 2, 4, 5, and10, and close refrigerant charging valve 7; openchiller isolation valve 11 and any other chiller isola-tion valves, if present.c. Open pumpout and storage tank valves 3 and 6; openchiller valves 1a and 1b.d. Gradually crack open valve 5 to increase chiller pres-sure to 35 psig (241 kPa). Slowly feed refrigerant toprevent freeze-up.e. Open valve 5 fully after the chiller pressure risesabove the freezing point of the refrigerant. Let thestorage tank and chiller pressure equalize. Openrefrigerant charging valve 7 and storage tank chargingvalve 10 to let liquid refrigerant drain into the chiller.2. Transfer remaining refrigerant.a. Close valve 5 and open valve 4. Turn off pumpout con-denser water, and turn on pumpout compressor in man-ual mode to push liquid refrigerant out of storage tank.Monitor the storage tank level until tank is empty.b. Close refrigerant charging valves 7 and 10.c. Turn off the pumpout compressor.d. Turn off the chiller water pumps.e. Close valves 3 and 4.f. Open valves 2 and 5.g. Turn on pumpout condenser water.h. Run the pumpout compressor in manual mode untilthe storage tank pressure reaches 5 psig (34 kPa), 18in. Hg vacuum (41 kPa absolute).i. Turn off the pumpout compressor.j. Close valves 1a, 1b, 2, 5, and 6.k. Turn off pumpout condenser water.Transfer the Refrigerant from Chiller to Pumpout Storage Tank1. Equalize refrigerant pressure.a. Valve positions:b. Slowly open valve 5 and refrigerant charging valves 7and 10 to allow liquid refrigerant to drain by gravityinto the storage tank.2. Transfer the remaining liquid.a. Turn off pumpout condenser water. Place valves in thefollowing positions:b. Run the pumpout compressor in automatic mode untilvacuum switch is satisfied and compressor stops.Close valves 7 and 10.c. Turn off the pumpout compressor.3. Remove any remaining refrigerant.a. Turn on chiller water pumps.b. Turn on pumpout condenser water.c. Place valves in the following positions:d. Run the pumpout compressor until the chiller pressurereaches 35 psig (241 kPa); then shut off the pumpoutcompressor. Warm chiller condenser water will boiloff any entrapped liquid refrigerant and chiller pres-sure will rise.e. When chiller pressure rises to 40 psig (276 kPa), turnon the pumpout compressor until the pressure againreaches 35 psig (241 kPa); then turn off the pumpoutcompressor. Repeat this process until the chiller pres-sure no longer rises; then turn on the pumpout com-pressor and pump out until the chiller pressurereaches 18 in. Hg vacuum (41 kPa absolute). This canbe done in On or Automatic mode.f. Close valves 1a, 1b, 3, 4, and 6.g. Turn off the pumpout condenser water.4. Establish vacuum for service. To conserve refrigerant,operate the pumpout compressor as described in Step 3euntil the chiller pressure is reduced to 18 in. Hg vacuum(41 kPa absolute).This operation can be done in Automatic or On mode. InAutomatic mode, the compressor will stop automaticallyat approximately 15 in. Hg vacuum (51 kPa absolute).CHILLERS WITH ISOLATION VALVESThe valves referred to in the following instructions are shown inFig. 40 and 41. Valve 7 remains closed.Transfer All Refrigerant to Chiller Condenser Vessel1. Push refrigerant into chiller condenser vessel.a. Turn on the chiller water pumps and monitor thechiller pressure.b. Valve positions:c. Equalize refrigerant in the chiller cooler and condenser.d. Turn off chiller water pumps and pumpout condenserwater supply.e. Turn on pumpout compressor to push liquid out of thechiller cooler vessel.f. When all liquid has been pushed into the chiller con-denser vessel, close the cooler refrigerant isolationvalve (11).g. Turn on the chiller water pumps.WARNINGDuring transfer of refrigerant into and out of the 19XR storagetank, carefully monitor the storage tank level gage. Do not fillthe tank more than 90% of capacity to allow for refrigerant ex-pansion. Overfilling may result in damage to the tank and per-sonal injury.VALVE 1A 1B 2 3 4 5 6 7 10 11CONDITION C C C C CVALVE 1A 1B 2 3 4 5 6 7 10 11CONDITION C CVALVE 1A 1B 2 3 4 5 6 7 10 11CONDITION C C C CVALVE 1A 1B 2 3 4 5 6 7 10 11CONDITION C C C C C C C C CVALVE 1A 1B 2 3 4 5 6 7 10 11CONDITION C C C C CVALVE 1A 1B 2 3 4 5 6 7 10 11CONDITION C CVALVE 1A 1B 2 3 4 5 6 7 10 11CONDITION C CVALVE 1A 1B 2 3 4 5 6 7 10 11CONDITION C C C CVALVE 1A 1B 2 3 4 5 6 7 10 11CONDITION C C C CVALVE 1A 1B 2 3 4 5 6 7 10 11CONDITION C C C C C C C C CVALVE 1A 1B 2 3 4 5 11CONDITION C C