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

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Carrier 19XRV Start-up, Operation And Maintenance Instructions Manual Manual pdf 75 page image

TO PRESSURIZE WITH DRY NITROGENNOTE: Pressurizing with dU nitrogen for leak testing shouldnot be done if the full refiigerant charge is in the vesselbecause purging file nitrogen is veU dill]cult.1. Connect a copper tube fiom the pressure regulator on thecylinder to the refligemnt charging valve. Never applyfull cylinder pressure to the pressurizing line. Follow thelisted sequence.2. Open file charging valve fully.3. Slowly open the cylinder regulating valve.4. Observe the pressure gage on the chiller and close theregulating valve when the pressure reaches test level. Donot (,.w_,ed 140 psig (965 kPa).5. Close the charging valve on the chiller. Remove thecopper tube if it is no longer mquimdiRepair the Leak, Retest, and Apply StandingVacuum Test- After pressurizing tile chiller, test forleaks with an electronic halide leak detectok soap bubblesolution, or an ultrasonic leak detector. Bring the chiller back toatmospheric pressure, repair a W leaks found, and retest.After retesting and finding no leaks, apply a standingvacuum test. Then dehydrate the chiller. Refer to the StandingVacuum Test and Chiller Dehydiation section (pages 55 and58) in the Before [nitial Start-Up section.Checking Guide Vane Linkage -- When the chilleris off. the guide vanes are closed and the actuator mechanism isin the position shown in Fig. 41. [f slack develops in the diivechain, do the following to eliminate backlash:1. With the chiller shut down and the actuator fl.dly closed,remove the chain guard and loosen the actuator bracketholddown bolts.2. Loosen guide vane sprocket adjusting bolts.3. PU bracket upwards to remove slack, then mtighten thebracket holddown bolts.4. Retighten the guide vane sprocket adjusting bolts. Ensurethat the guide vane shaft is rotated fully in the clockwisedirection in order close it fully.3ACT VANESPROCKET ACTUATORCHAINGUARDCLOSEBRACKETHOLDDOWNBOLTSVANESHAFT VANESPROCKETTrim Refrigerant Charge -- To reraove any excess re-frigerant, follow the procednm in Transfer Refrigerant fromChiller to Pumpout Storage Tank section, Steps la and b,page 72.Refer to the Trimming Refligerant Charge section onpage 66.WEEKLY MAINTENANCECheck the Lubrication System -- Mark the oil levelon the reservoir sight glass, and observe the level each weekwhile the chiller is shut down.If the level goes below the lower sight glass, check the oilreclaim system for proper operation. If additional oil isrequired, add it through the oil di'ain ch_u'gingwdve (Fig. 2). Apump is required when adding oil against refrigerant pressure.The oil charge for the 19XRV compressor depends on thecompressor Frmne size:• Frame 2 compressor-- 8 gal (30 L)• Frame 3 compressor-- 8 gal (30 L)• Frame 4 compressor-- 10 gal (37.8 L)• Frame 4 compressor with split ring diffuser -- 12 gal(45 L)• Frame 5 compressor -- 18 gal (67.8 L)The added oil must meet Career specifications for the19XRV. Refer to Changing Oil Filter and Oil Changes sectionon page 76. Any additional oil that is added should be loggedby noting the amount and date. Any oil that is added due to oilloss that is not related to service will eventually return to thesump. It must be removed when the level is high.An oil heater is controlled by the PIC III to maintain oiltemperature (see the Controls section) when the compressor isoff. The ICVC COMPRESS screen displays whether the heateris energized or not. The heater is energized if the OIL HEATERRELAY p_umneter reads ON. [f the PIC III shows that theheater is energized and if the sump is still not heating up, thepower to the oil heater may be off or the oil level may be toolow. Check the oil level, the oil heater contactor voltage, and oilheater resistance.The PIC 1II does not permit compressor start-up if the oiltemperature is too low. The PIC III continues with start-up onlyafter the temperature is within allowable limits.SCHEDULED MAINTENANCEEstablish a regular maintenance schedule based on actualchiller requirements such as chiller load, run hours, and waterquality. The time inteia'als listed in this section an" o_'red asguides to sem'i_z" onh"Service Ontime -- The [CVC will display a SERVICEONTIME value on the MAINSTAT screen. This value shouldbe reset to zero by the service person or the operator each timemajor service won is completed so that the time betweenservice can be viewed and tracked.GUIDE VANE SPROCKETADJUSTING BOLTSFig. 41 --Guide Vane Actuator Linkage75