Carrier AquaEdge 19XRV series Operation, Maintenance And Installation 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

85Transfer Refrigerant from Storage Tank Vessel to Chiller1. Equalize refrigerant pressure.a. Turn on chiller water pumps, establishing waterflow (assumes vacuum condition in chiller sys-tem).b. Close pumpout and storage tank valves 2, 4, 5, 7,8, 10 (if present open isolation valve 11 and otherisolation valves between cooler and condenser).Open storage tank valves 6; open chiller valves 1Aand 1B.c. Gradually open valve 5 to slowly increase chillerpressure to 35 psig (241 kPa) to reduce the poten-tial of tube freeze up.d. Open valve 5 fully after the chiller pressurereaches 35 psig (241 kPa) or greater. Let chillerpressure reach 40 psig (276 kPa), then chiller waterpumps can be turned off. Fully close valve 5.e. Open valve 8 and 10 to let higher pressure in therecovery tank push liquid refrigerant into the con-denser float chamber and heat exchangers until therefrigerant pressure equalizes between the recov-ery tank and chiller.2. Push liquid to chiller, them remove remaining vapor fromstorage tank:a. To prepare for liquid, push open valve 4.b. Ensure pumpout condenser water is off, then turnon the pumpout compressor in manual mode topush liquid to chiller. Monitor the storage tanklevel until tank is empty of liquid refrigerant.c. Close charging valves 8 and 10.d. Turn off the pumpout compressor.e. To prepare for removal of remaining refrigerantvapor in storage tank, close pumpout valves 3 and4 and open valves 2 and 5.f. Turn on pumpout condenser water.g. Run pumpout unit in auto until the vacuum switchis satisfied. This occurs approximately at 15 in. Hgvacuum (48 kPa absolute or 7 psia), removing theresidual refrigerant vapor from the recovery tankand condensing to a liquid in the chiller. Closevalves 1A, 1B, 2, 5, 6.h. Turn off pumpout condenser water.Transfer Refrigerant from Chiller to Storage Tank Vessel1. Equalize refrigerant pressure.a. Dehydrate the refrigerant storage vessel, and con-nected hoses/piping so there are no non-condens-ables mixed with the refrigerant.b. Locate valves as identified below:c. Slowly open valve 5 until the refrigerant pressurereaches 35 psig (241 kPa) in the storage tank, fol-lowed by valves 7 and 10 to allow liquid refriger-ant to drain by gravity.2. Push remaining liquid, followed by refrigerant vapor re-moval from chiller.a. To prepare for liquid push, turn off the pumpoutcondenser water. Place valves in the followingpositions:b. Run the pumpout compressor in manual until allliquid is pushed out of the chiller (approximately45 minutes). Close valves 2, 5, 7, and 10, then stopcompressor.c. Turn on pumpout condenser water.d. Open valves 3 and 4, and place valves in the fol-lowing positions:e. Run the pumpout compressor until the chiller pres-sure reaches 35 psig (241 kPa), followed by turn-ing off the pumpout compressor. Warm chillercondenser water will boil off any entrapped liquidrefrigerant, and chiller pressure will rise.WARNINGDuring transfer of refrigerant into and out of the19XR,XRV storage tank, carefully monitor the storagetank level gage. Do not fill the tank more than 90% ofcapacity to allow for refrigerant expansion. Overfillingmay result in damage to the tank and personal injury.VALVE 1A 1B 2 3 4 5 6 7 8 10 11CONDITION C C C C C CVALVE 1A 1B 2 3 4 5 6 7 8 10 11CONDITION C C C C C CVALVE 1A 1B 2 3 4 5 6 7 8 10 11CONDITION C C C CVALVE 1A 1B 2 3 4 5 6 7 8 10 11CONDITION C C CCOMPRESSOROILSEPARATORCONDENSERLEAVINGWATERENTERINGWATERVALVE5VALVE4VALVE2CONTROLPANELFRAMEASSEMBLYOILHEATERVALVE3OIL FILLFITTINGFig. 49 — Pumpout Unita23-1546VALVE 1A 1B 2 3 4 5 6 7 8 10 11CONDITION C C C C CVALVE 1A 1B 2 3 4 5 6 7 8 10 11CONDITION C C C C C C C C C CVALVE 1A 1B 2 3 4 5 6 7 8 10 11CONDITION C C C C C CVALVE 1A 1B 2 3 4 5 6 7 8 10 11CONDITION C C CVALVE 1A 1B 2 3 4 5 6 7 8 10 11CONDITION C C CVALVE 1A 1B 2 3 4 5 6 7 8 10 11CONDITION C C C C C C CVALVE 1A 1B 2 3 4 5 6 7 8 10 11CONDITION C C C C C