York Centrifugal Chiller YKGQEVP85CEGS

Perform chemical analysis of oil

Repair any leaks found immediately

Perform leak test with R134a compatible leak detector

Check graphic control centre (OptiView) displays.

Is the compressor in operation?

Enter the bearing oil pressure from the SYSTEM Screen.

Enter the oil level in the oil reservoir.

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

Enter the entering condenser water pressure and temperature.

Enter the leaving condenser water pressure and temperature.

Check for potential leak scenarios

Is refrigerant detected at the liquid head vents after shutdown?

Has system capacity and efficiency dropped sharply?

Immediate Actions for Detected Leaks

Valve off evaporator and condenser from the water circuit

Drain evaporator and condenser immediately

Drain and purge refrigerant system with dry nitrogen

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 to prevent moisture absorption

Prepare the oil charging pump and connect to the oil charging valve

Connect a high capacity vacuum pump to the system charging valve and start the pump

Ensure all valves to the atmosphere are closed

Operate the vacuum pump until a wet bulb temperature of 0°C or a pressure of 5 mm Hg is reached

Circulate warm water through the evaporator and condenser tubes

Ensure water temperature does not exceed 50°C

Close the system charging valve and the stop valve between the vacuum indicator and the vacuum pump

Disconnect the vacuum pump leaving the vacuum indicator in place