AquaEdge® High-Efficiency Semi-Hermetic Centrifugal Chiller Unit 19XR | Weekly Maintenance

Check the Lubrication System

• Mark the oil level on the reservoir sight glass, and observe the level each week while the chiller is shut down.

• If the level goes below the lower sight glass, check the oil reclaim system for proper operation. If additional oil is required, add it through the oil drain charging valve (Fig. 3-5). A pump is required when adding oil against refrigerant pressure. See “Oil Charge” on page 32 for 19XR compressor family oil charge.

• The added oil must meet Carrier specifications for the 19XR chiller. Refer to Changing Oil Filter and Oil Changes sections. Any additional oil that is added should be logged by noting the amount and date. Any oil that is added due to oil loss that is not related to service will eventually return to the sump. It must be removed when the level is high.

• An oil heater is controlled by the PIC 6 control system to maintain oil temperature (see the 19XR with PIC 6 Controls Operation and Troubleshooting manual) when the compressor is off. If the PIC 6 control system shows that the heater is energized and if the sump is still not heating up, the power to the oil heater may be off or the oil level may be too low. Check the oil level, the oil heater contactor voltage, and oil heater resistance.

• The PIC 6 control system does not permit compressor start-up if the oil temperature is too low. The PIC 6 control system continues with start-up only after the temperature is within allowable limits.