Daikin Water Chiller WDC087

Maintenance of the refrigerant cycle includes maintaining a log of the operating conditions, and checking 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

Subtracting the saturated temperature equivalent of the suction pressure from this will give the suction superheat.

Warning: This procedure requires trained personnel with PPE!

Record the water and the saturated refrigerant temperatures

Check if approach increase is two-degrees or more

Check for higher than normal discharge pressure and motor current

Inspect the condenser tubes for fouling

Clean the condenser tubes if required

Procedure to remove the dished water heads

At every inspection, the oil, suction, and discharge pressures should be noted and recorded, as well as condenser and chiller water temperatures.

Record the condenser water temperature

Record the chiller water temperature

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

Record the suction line temperature at the compressor

Examine Contactors (hardware and operation)

Verify Overload Setting and Trip

Test Electrical Connections (Infrared temp measurement)

Sign off on the air compressor starter 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