York Centrifugal Chiller YKMQMQK15CNGS

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

Inspect control panel for foreign materials and cleanliness

Check 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

Check graphic control centre (OptiView) displays.

Check for any signs of dirty or fouled condenser tubes.

Is the compressor in operation?

Enter the bearing oil pressure on the SYSTEM Screen.

Enter the oil level in the oil reservoir.

Is the operating oil level between the upper and lower sight glasses?

Perform chemical analysis of oil

Were any leaks found during the test?

Repair any leaks found immediately

Perform leak test with R134a compatible leak detector

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

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.

Enter the system pressure after adding refrigerant vapour.

Ensure the system pressure is above 58.9 kPa for R134a to prevent freezing.

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.