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

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Carrier AquaEdge 19XR series Start-up, Operation And Maintenance Instructions Manual Manual pdf 90 page image

90Operating the Optional Pumpout Unit(Fig. 47) — Oil should be visible in the pumpout unit com-pressor sight glass under all operating conditions and duringshutdown. If oil is low, add oil as described under OptionalPumpout System Maintenance section, page 98. The pumpoutunit control wiring schematic is detailed in Fig. 48.TO READ REFRIGERANT PRESSURES (during pumpoutor leak testing):1. The ICVC display on the chiller control panel is suitablefor determining refrigerant-side pressures and low (soft)vacuum. To assure the desired range and accuracy whenmeasuring evacuation and dehydration, use a qualityvacuum indicator or manometer. This can be placed onthe Schrader connections on each vessel (Fig. 2 and 3) byremoving the pressure transducer.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. 43 and 44 for valve locations and numbers.POSITIVE PRESSURE CHILLERS WITH STORAGETANKS — In the Valve/Condition tables that accompany theseinstructions, the letter “C” indicates a closed valve. Figures 43and 44 show the locations of the valves.DANGERDuring transfer of refrigerant into and out of the optionalstorage tank, carefully monitor the storage tank level gage.Do not fill the tank more than 90% of capacity to allow forrefrigerant expansion. Overfilling may result in damage tothe tank or the release of refrigerant which will result inpersonal injury or death.CAUTIONDo not mix refrigerants from chillers that use differentcompressor oils. Compressor damage can result.CAUTIONTransfer, addition, or removal of refrigerant in spring-isolated chillers may place severe stress on external pipingif springs have not been blocked in both up and downdirections.CAUTIONAlways run chiller cooler and condenser water pumps andalways charge or transfer refrigerant as a gas when chillervessel pressure is less than 35 psig (241 kPa). Below thesepressures, liquid refrigerant flashes into gas, resulting inextremely low temperatures in the cooler/condenser tubesand possibly causing tube freeze-up.COMPRESSOROILSEPARATORCONDENSERLEAVINGWATERENTERINGWATERVALVE5VALVE4VALVE2CONTROLPANELFRAMEASSEMBLYOILHEATERVALVE3OIL FILLFITTINGFig. 47 — Pumpout Unita23-1546LEGENDC — ContactorFU — FuseGND — GroundHTR — HeaterMTR — MotorNC — Normally ClosedOL — OverloadSS — Selector SwitchFig. 48 — Pumpout Unit Wiring Schematica19-2437