York Centrifugal Chiller YKDPDPQ45CCGS

7.1.6 Annually (more often if necessary)

Recommendations for water treatment

Has a chemical analysis of the water been conducted?

Water treatment expert consultation notes

Remove refrigerant charge when opening any part of the refrigerant system for repairs.

Isolate refrigerant if chiller is 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.

Check for potential leak scenarios

Is refrigerant detected at the liquid head vents after shutdown?

Has system capacity and efficiency dropped sharply?

Valve off evaporator and condenser from water circuit

Drain evaporator and condenser to prevent rusting and corrosion

Drain and purge refrigerant system with dry nitrogen

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

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 expected

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