Daikin Centrifugal Compressor Water Chiller HSC126

Maintenance of the electrical system involves the general requirement of keeping contacts clean and connections tight and checking on specific items as follows:

1. The compressor current draw should be checked and compared to nameplate RLA value. Normally, the actual current will be lower, since the nameplate rating represents full load operation.

Also check all pump and fan motor amperages, and compare with nameplate ratings.

2. Inspection must verify that the oil heaters are operative. The heaters are insert-cartridge type and can be checked by ammeter reading.

They should be energized whenever power is available to the control circuit, when the oil temperature sensor calls for heat, and when the compressor is inoperative.

When the compressor runs, the heaters are de-energized. The Digital Output screen and second View screen on the operator interface panel both indicate when the heaters are energized.;

Clean Oil Cooler Strainer (water)

Oil filter change and compressor teardown and inspection should be done based on the results of the annual oil test performed by a company specializing in this type of test.

Enter the results of the oil test

Consult Daikin Service for recommendations.

Sign off on the lubrication system maintenance

Calibrate Temperature Transducers

Check Vane Control Setting and Operation

Verify Motor Load Limit Control

Sign off on the operating controls maintenance

Warning: This procedure requires trained personnel with PPE!

Daikin chillers are at positive pressure at all times and do not leak contaminated moist air into the refrigerant circuit, thereby eliminating the need for annual oil changes.

An annual laboratory oil check is recommended to check overall compressor condition.

Isolate the filter cavities. Close the oil discharge line service valve at the oil pump (at the filter on CE126).

Remove the filter cover; some foaming can occur but the check valve should limit leakage from other compressor cavities.

Remove the filter, replace with new element, and replace filter cover using a new gasket.

Reopen the valve in the pump discharge line and purge air from the oil filter cavity.

When machine is operated again, the oil level must be checked to determine if oil needs to be added to maintain the proper operating level.

Sign off on the oil filter replacement

Maintain a log of the operating conditions, and check that the unit has the proper oil and refrigerant charge.

The suction line temperature at the compressor should be taken at least once a month.

Suction line temperature at the compressor