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

43Operating the Optional Pumpout Unit (Fig. 44)Oil should be visible in the pumpout unit compressor sight glassunder all operating conditions and during shutdown. If oil is low,add oil as described under Optional Pumpout System Mainte-nance section, page 52. The pumpout unit control wiring schemat-ic is detailed in Fig. 45.TO READ REFRIGERANT PRESSURES (during pumpout orleak testing):1. The display on the chiller control panel is suitable fordetermining refrigerant-side pressures and low (soft) vac-uum. To assure the desired range and accuracy when mea-suring evacuation and dehydration, use a quality vacuumindicator or manometer. This can be placed on theSchrader connections on each vessel by removing thepressure transducer (Fig. 3-5).2. To determine pumpout storage tank pressure, a 30 in. Hgvacuum -0-400 psi (-101-0-2769 kPa) gage is attached tothe storage tank.3. Refer to Fig. 40 and 41 for valve locations and numbers.POSITIVE PRESSURE CHILLERS WITH STORAGE TANKSIn the Valve/Condition tables that accompany these instructions,the letter “C” indicates a closed valve. Figures 40 and 41 showthe locations of the valves.Fig. 44 — Pumpout UnitFig. 45 — Pumpout Unit Wiring SchematicDANGERDuring transfer of refrigerant into and out of the optional stor-age tank, carefully monitor the storage tank level gage. Do notfill the tank more than 90% of capacity to allow for refrigerantexpansion. Overfilling may result in damage to the tank or therelease of refrigerant which will result in personal injury ordeath.CAUTIONDo not mix refrigerants from chillers that use different com-pressor oils. Compressor damage can result.CAUTIONTransfer, addition, or removal of refrigerant in spring-isolatedchillers may place severe stress on and damage external pipingif springs have not been blocked in both up and down directions.CAUTIONAlways run chiller cooler and condenser water pumps and al-ways charge or transfer refrigerant as a gas when chiller vesselpressure is less than 35 psig (241 kPa). Below these pressures,liquid refrigerant flashes into gas, resulting in extremely lowtemperatures in the cooler/condenser tubes and possibly caus-ing tube freeze-up.a23-1546COMPRESSOROILSEPARATORCONDENSERLEAVINGWATERENTERINGWATERVALVE5VALVE4VALVE2CONTROLPANELFRAMEASSEMBLYOILHEATERVALVE3OIL FILLFITTING2 OL2 OL2 OLMTR-1L1L2PUMP OUTCOMPRESSORCRANKCASE HEATER240-600v27-40 WATTGNDH1 H4X1 X2X2HIGH PRESSURESAFETYNC OPEN > 185psigCONTROL POWERTRANSFORMERXFMR-169 VACCC87HTR-1FU10.25AFU20.25AFU30.5A1222 34SS-1OFFAUTO ONLOW PRESSURE CONTROLNC OPEN < 7 psia (-15.7 in. HG)CLOSE > 9 psia (-11.6 in. HG)5 C X26FIELDPOWERSUPPLYL1L2L3LEGENDC — ContactorFU — FuseGND — GroundHTR — HeaterMTR — MotorNC — Normally ClosedOL — OverloadSS — Selector Switcha23-1615