York Centrifugal Chiller YKZSZSK75DDGS

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 earth connections

Verify site voltage supply corresponds to unit requirement

Test all system joints for refrigerant leaks with a leak detector

Were any refrigerant leaks found?

Repair any detected refrigerant leaks before long-term shutdown

Periodically check the tightness of the system during idle periods

Drain water from cooling tower, condenser, condenser pump, chilled water system, chilled water pump, and coils if freezing temperatures are encountered

Open drains on evaporator and condenser liquid heads to ensure complete drainage

Drain water from additional systems if applicable

Disable the clock on the SETUP Screen to conserve battery

Check the refrigerant charge (See Refrigerant Charge Checking)

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

Has the pressure and temperature equalised between the condenser and evaporator?

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

7.1.5 Every 6 Months (or more often as required)

Change and inspect compressor oil filter element

Inspect for internal wearing of compressor parts

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

Examine oil filter element for aluminum particles

Are aluminum particles found in the oil filter?

Contact York Service Agent if aluminum particles continue to accumulate

Has the variable speed oil pump (VSOP) Drive frequency increased to 55 Hz?

Inspect oil filter for aluminum particles indicating possible bearing wear