York Centrifugal Chiller YKCPCPQ35CCGS

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

7.1.6 Annually (more often if necessary)

Is the temperature difference between the water off the condenser and the condenser liquid temperature more than 2.2 K greater than the difference recorded on a new unit?

Has the temperature difference between the refrigerant and the chilled water increased slowly over the operating season?

Has a chemical analysis of the water been conducted?

Is water treatment necessary according to the water treatment expert?

7.1.6 Annually (more often if necessary)

Drain and replace the oil in the compressor oil sump

Verify the nominal oil charge for the compressor is 75.7 litres of York 'K' oil

Ensure only York 'K' refrigeration oil is used in the centrifugal compressor

Check that the oil is kept tightly capped until used

Immerse the suction connection of the oil charging pump in a clean container of new oil

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?

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.