Carrier 17EX Start-up, Operation And Maintenance Instructions Manual

Also see for 17EX Series: Start up & operation manual Start-up, operation and maintenance instructions

Contents

WEEKLY MAINTENANCECheck the Lubrication System — Mark the oil levelon the compressor reservoir sight glass, and observe the leveleach week while the chiller is shut down.If the level goes below the lower sight glass, the oil re-claim system will need to be checked for proper operation.If additional oil is required, add oil as follows:Oil may be added through the oil drain and charging valve(Fig. 2, Item 22) using a pump. However, an oil chargingelbow on the seal-oil return chamber (Fig. 4) allows oil to beadded without pumping. The seal oil return pump automati-cally transfers the oil to the main oil reservoir. A pump isrequired for adding oil against refrigerant pressure. The oilcharge is approximately 20 gallons (76 L) for FX (size 531-599) style compressors. The added oil must meet Carrier’sspecifications. Refer to Changing the Oil Filters and Oil Changessections. Any additional oil that is added should be loggedby noting the amount and date. Any oil that is added due tooil loss that is not related to service will eventually return tothe sump, and must be removed when the level is high.An oil heater is controlled by the PIC to maintain oil tem-perature above 150 F (65.5 C) or refrigerant temperature plus70° F (38.9° C) (see the Controls section) when the com-pressor is off. The LID STATUS02 screen displays whetherthe heater is energized or not (OIL HEATER RELAY). If thePIC shows that the heater is ON, but the sump is not heatingup, the power to the oil heater may be off or the oil levelmay be too low. Check the oil level, the oil heater contactorvoltage, and oil heater resistance.The PIC does not permit compressor start-up if the oil tem-perature is too low. The PIC continues with start-up onlyafter the temperature is within limits.After the initial start or a 3-hour power failure, the PICallows the chiller to start once the oil is up to proper tem-perature, but uses a slow ramp load rate of 2° F (1.6° C) perminute.Be sure that the isolation valves on the oil line near thefilter(s) (Fig. 44) are fully open before operating the com-pressor.There are no lubrication requirements for the FX disccoupling.Check the oil level in the gear reservoir and observe thelevel each week. If additional oil is required, add oil as de-scribed in the Oil Changes section on page 77. The added oilmust meet Carrier specifications. (See Table 11.) Do not over-fill the reservoir. Any additional oil added or removed shouldbe logged by noting the amount and date.Check the oil level in the motor bearings and observe thelevel each week. If additional oil is required, add oil as de-scribed in the Oil Changes section on page 77. The added oilmust meet Carrier specifications. (See Table 11.) Any addi-tional oil added or removed should be logged by noting theamount and date.SCHEDULED MAINTENANCEEstablish a regular maintenance schedule based on the ac-tual chiller requirements such as chiller load, run hours, andwater quality. The time intervals listed in this section are of-fered as guides to service only.Service Ontime — The LID displays a SERVICE ON-TIME value on the STATUS01 screen. This value shouldbe reset to zero by the service person or the operator eachtime major service work is completed so that time span be-tween service can be tracked and viewed.Inspect the Control Center — Maintenance is lim-ited to general cleaning and tightening of connections. Vacuumthe cabinet to eliminate dust build-up. If the chiller controlsmalfunction, refer to the Troubleshooting Guide section forcontrol checks and adjustments.Be sure power to the control center is off whencleaning and tightening connections inside the controlcenter.Check Safety and Operating Controls Monthly— To ensure chiller protection, the automated control testshould be done at least once per month. See Table 3 for safetycontrol settings.Changing the Oil FiltersCOMPRESSOR OIL FILTER — Change this oil filter an-nually or whenever the chiller is open for repairs. The 17FXcompressor has an isolatable filter so that the filter may bechanged without removing refrigerant from the chiller. Usethe following procedure.1. Make sure the compressor is off and that the compressordisconnect is open.2. Disconnect the power to the oil heater and oil pump.3. Close the valves to the filter.4. Relieve the pressure from within the filter by using thepressure connection on the oil feed line valve to the com-pressor. Run a hose from the connection to a bucket tocatch the oil.*Water out line is hidden behind oil out line.Fig. 44 — Typical Compressor or Gear Oil Cooler/Filter76