York Centrifugal Chiller YKEPEPP75CPGS

Inspect unit for installation damage

Check refrigerant charge and inspect for leaks

Check oil system charge and oil level

Verify single point of electrical isolation

Check control panel for foreign materials and cleanliness

Verify correct connection of customer power cables

Verify proper earthing of unit and tightness of internal connections

Verify site voltage supply corresponds to unit requirement

7.1.5 Every 6 Months (or more often as required)

Change and inspect compressor oil filter element

Check controls and safety cutouts

Is the unit shutting down on High Oil Temperature or Low Oil Pressure?

Change the oil filter element if necessary

Examine the oil filter element for aluminum particles and describe findings

Are aluminum particles continuing to accumulate after a new filter is installed?

Contact York Service Agent if aluminum particles continue to accumulate and describe the situation

7.4.1 Checking The Refrigerant Charge

Record the refrigerant level after initial charging

Is the refrigerant level visible in the sight glass?

Ensure the system is shut down before checking and trimming the refrigerant charge

Verify that the pressure and temperature have equalised between the condenser and evaporator (4 hours or more after stopping the compressor and water pumps)

Remove refrigerant charge when opening any part of the refrigerant system for repairs.

Isolate refrigerant in the following components if equipped with optional valves

Add only refrigerant vapour to the system until pressure is above freezing point of evaporator liquid.

Ensure system pressure is above 58.9 kPa for R134a at sea level.

Prevent moisture laden air from entering the system during charging.

Make up a suitable charging connection from new copper tubing.

Purge the charging connection each time a new container of refrigerant is connected.

Change containers quickly to minimise refrigerant loss.

Perform chemical analysis of oil

Were any leaks found during the test?

Describe the repairs made for any leaks found

Perform leak test with R134a compatible leak detector

Are all joints tight after leak testing?

Describe any repairs made to stop leaks