York Centrifugal Chiller YKPQPQK25CNGS

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?

Describe any findings of aluminum particles and actions taken

Change oil filter when VSOP Drive frequency reaches 55 Hz

Inspect oil filter for aluminum particles indicating possible bearing wear

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?

Enter the time elapsed since the compressor and water pumps were stopped (in hours)

7.1.6 Annually (more often if necessary)

Inspect and service electrical components as necessary

Perform chemical analysis of system

Inspect all electrical controls for obvious malfunctions

Ensure factory settings of controls (operation and safety) are unchanged

Perform chemical analysis of oil

Repair any leaks found immediately

Perform leak test with R134a compatible leak detector

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

Is the system tightness checked periodically 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