Carrier 19XR User Manual

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

Contents

70TRANSFER REFRIGERANT FROM CHILLER TO PUMP-OUT STORAGE TANK1. Equalize refrigerant pressure.a. Valve positions:b. Slowly open valve 5. When the pressures areequalized, open liquid line valve 7 to allow liquidrefrigerant to drain by gravity into the pumpoutstorage tank.2. Transfer the remaining liquid.a. Turn off the pumpout condenser water. Place thevalves in the following positions:b. Run the pumpout compressor for approximately30 minutes; then close valve 10.c. Turn off the pumpout compressor.3. Remove any remaining refrigerant.a. Turn on the chiller water pumps using the PUMP-DOWN LOCKOUT screen, accessed from theCONTROL TEST table. Turn on the pumps manu-ally, if they are not controlled by the PIC II.b. Turn on the pumpout condenser water.c. Place valves in the following positions:d. Run the pumpout compressor until the chiller pres-sure reaches 30 psig (207 kPa) for HFC-134a.Then, shut off the pumpout compressor. Warmcondenser water will boil off any entrapped liquidrefrigerant and the chiller pressure will rise.e. When the pressure rises to 40 psig (276 kPa) forHFC-134a, turn on the pumpout compressor untilthe pressure again reaches 30 psig (207 kPa), andthen turn off the pumpout compressor. Repeat thisprocess until the pressure no longer rises. Then,turn on the pumpout compressor and pump untilthe pressure reaches18 in. Hg. (40 kPa absolute).f. Close valves 1a, 1b, 3, 4, 6, 7, and 10.g. Turn off the pumpout condenser water and con-tinue to use the PIC II PUMPDOWN LOCKOUTscreen functions, which lock out the chiller com-pressor for operation.4. Establish a vacuum for service.To conserve refrigerant, operate the pumpout compressoruntil the chiller pressure is reduced to 18 in. Hg vac., ref30 in. bar. (40 kPa abs.) following Step 3e.Chillers with Isolation ValvesTRANSFER ALL REFRIGERANT TO CHILLER CON-DENSER VESSEL — For chillers with isolation valves,refrigerant can be stored in one chiller vessel or the other with-out the need for an external storage tank.1. Push refrigerant into the chiller condenser.a. Valve positions:b. Using the PIC II controls, turn off the chiller waterpumps and pumpout condenser water. If the chillerwater pumps are not controlled through the PIC II,turn them off manually.c. Turn on the pumpout compressor to push the liquidrefrigerant out of the chiller cooler vessel.d. When all liquid refrigerant has been pushed intothe chiller condenser vessel, close chiller isolationvalve 11.e. Access the PUMPDOWN LOCKOUT screen onthe PIC II CONTROL TEST table to turn on thechiller water pumps. If the chiller water pumpsare not controlled by the PIC II, turn them onmanually.f. Turn off the pumpout compressor.2. Evacuate the refrigerant gas from chiller cooler vessel.a. Close pumpout compressor valves 2 and 5, andopen valves 3 and 4.b. Turn on the pumpout condenser water.c. Run the pumpout compressor until the chillercooler vessel pressure reaches 18 in. Hg vac(40 kPa abs.). Monitor pressures on the CVC/ICVC and on refrigerant gages.d. Close valve 1a.e. Turn off the pumpout compressor.f. Close valves 1b, 3, and 4.g. Turn off the pumpout condenser water.h. Proceed to the PUMPDOWN/LOCKOUT functionaccessed from the CONTROL TEST table to turnoff the chiller water pumps and lock out the chillercompressor. Turn off the chiller water pumps man-ually if they are not controlled by the PIC II.TRANSFER ALL REFRIGERANT TO CHILLERCOOLER VESSEL1. Push the refrigerant into the chiller cooler vessel.a. Valve positions:b. Turn off the chiller water pumps (either throughthe PIC II controls or manually, if necessary) andthe pumpout condenser water.c. Turn on the pumpout compressor to push therefrigerant out of the chiller condenser.d. When all liquid refrigerant is out of the chiller con-denser, close the cooler isolation valve 11.e. Turn off the pumpout compressor.VALVE 1a 1b 2 3 4 5 6 7 8 10 11 12 13 14CONDITION C C C C CVALVE 1a 1b 2 3 4 5 6 7 8 10 11 12 13 14CONDITION C C CVALVE 1a 1b 2 3 4 5 6 7 8 10 11 12 13 14CONDITION C C CVALVE 1a 1b 2 3 4 5 6 7 8 10 11 12 13 14CONDITION C C C CVALVE 1a 1b 2 3 4 5 6 7 8 10 11 12 13 14CONDITION C C C CVALVE 1a 1b 2 3 4 5 6 7 8 10 11 12 13 14CONDITION C C C C C C C C C CVALVE 1a 1b 2 3 4 5 8 11 12 13 14CONDITION C C C C C CVALVE 1a 1b 2 3 4 5 8 11 12 13 14CONDITION C C C C C C CVALVE 1a 1b 2 3 4 5 8 11 12 13 14CONDITION C C C C C C C C C C CVALVE 1a 1b 2 3 4 5 8 11 12 13 14CONDITION C C C C C C