Carrier 19XRV Start-up, Operation And Maintenance Instructions Manual

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Carrier 19XRV Start-up, Operation And Maintenance Instructions Manual Manual pdf 78 page image

Water Treatment--Untreated or improperly treatedwater may result in corrosion, scaling, erosion, or algae. Theservices of a qu_dified water treatment specialist should beobtained to develop and monitor a treatment program.Water must be within design flow limits, clean, and treatedto ensure proper chiller performance and reduce the poten-tial of tube &image due to corrosion, scaling, erosion, andalgae. CtuTier assumes no responsibility for chiller &imageresulting from untreated or improperly treated watecInspect the VFDThe motor leads must be disconnected from the starterbefore an insulation test is performed. The voltagegenerated from the tester can &_mage the starter o1 drivecomponents.Before working on tiny st_uter or drive, shut off the chillel:open and tag all disconnects supplying power to the stfulecAfter disconnecting input power to a VFD and beforetouching tiny internal components, wait five minutes forthe DC bus capacitors to discharge, then check the voltagewith a voltmetel: Failure to observe this precaution couldresult in sever bodily injury or death.The disconnect on the st_uter fiont panel does not deener-gize all internal circuits. Open all internal and remotedisconnects before servicing the sttutel:Never open isolating knife switches while equipment isoperating. Electrical arcing can cause serious injury.Periodically vacuum or blow off accumulated debris on in-ternal VFD enclosure components with a high-velocity, low-pressure blowecPower connections on newly installed VFDs may relaxand loosen after a month of operation. Turn power off andretighten. Recheck annually thereafter.Loose power connections can cause voltage spikes, over-heating, m¢fllimctioning, or failures.Recalibrate Pressure Transducers -- Once a yea1,the pressure transducers should be checked against a pressuregage reading. Check all eight transducers: the 2 oil differenti_flpressure transduco_, the condenser pressure transducer, thecooler pressure transduce1: the diffuser pressure transducer(only for compressors equipped with split ring diffusers), andthe optional wato_ide pressure transducer pairs (consisting of4 flow devices: 2 cooler. 2 condenser).Note the evaporator and condenser pressure readings on theHEAT EX screen on the ICVC (EVAPORATOR PRESSUREand CONDENSER PRESSURE). Attach an accurate set ofrefrigeration gages to the cooler and condenser Schmderfittings. Comptue the two readings. If there is a difference inreadings, the transducer can be calibrated as described in theTroubleshooting Guide section. Oil differential pressure (OILPUMP DELTA P on the COMPRESS screen) should be zerowhenever the compressor is off.Optional Pumpout System Maintenance -- Forpumpout unit colnpressor maintenance details, refer to the19XR Positive Pressure Stolage System Installation, Start-Up,and Service Instructions.OPTIONAL PUMPOUT COMPRESSOR OIL CHARGE --Use oil conforming to Carrier specifications for reciprocat-ing compressor usage. Oil requirements are as follows:ISO Viscosity ................................ 68 or 220Cturier Pfut Number. ........... PP23BZ 103 or PP23BZ104The total oil chtuge is 13 oz. (0.5 L)Oil should be visible in the pumpout compressor sight glassboth during operation and at shutdown. Always check the oillevel before operating the pumpout compressol: Before addingchanging oil, relieve the refrigerant pressure through the accessvalves.Relieve refrigerant pressure and add oil to the pumpout unitfollows:1. Close service v_dves 2and4.2. Run the pumpout compressor in Automatic mode for oneminute or until the vacuum switch is satisfied and com-pressor shuts off.3. Move the pumpout selector switch to OFE Pumpoutcompressor shell should now be under vacuum.4. Oil can be added to the shell with a hand oil pumpthrough the access valve in the compressor base.NOTE: The compressor access valve has a self-sealing fittingwhich will require a hose connection with a depressor to open.OPTIONAL PUMPOUT SAFETY CONTROL SETTINGS(Fig. 43)--The optional pumpout system high-pressureswitch opens fit 185 psig (1276 kPa) and closes fit 140 psig(965 kPa). Check the switch setting by operating the pumpoutcompressor and slowly throttling the pumpout condenserwaterOrdering Replacement Chiller Parts -- Whenordering Carrier specified parts, the following informationmust accompany tin order:• chiller model number and serial number• name, quantity, and part number of the part required• delivery address and method of shipment.TERMINALCONTACTOR STRIP FUSES\SWITCH@TRANSFORMERFig. 43 -- Pumpout Control Box (Interior)78