York Centrifugal Chiller YKFQFTQ75CEGS

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?

Time elapsed since compressor and water pumps were stopped (in hours)

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.

Check the oil level in the oil reservoir.

Perform chemical analysis of oil

Were leaks repaired immediately?

Leak test the system with a R134a compatible leak detector

Ensure all necessary precautions are taken before opening the refrigerant system

Is the refrigerant system evacuated before charging?

Enter the system pressure before charging

Is the system pressure above 58.9 kPa to prevent freezing of evaporator liquid?

Add refrigerant vapour to the system until the pressure is above freezing point

Ensure no moisture laden air enters 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

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