Dunham-Bush Rotary Screw Water Chiller WCFX42

Inspect for physical disfigurement of the gasket

Check for signs of deterioration

Is the gasket physically disfigured or deteriorated?

Document the inspection results

Has the phase control relay tripped?

Did the phase control relay trip again after resetting?

Call your electric utility to investigate the problem

Circuit Breaker and Motor Overload Relay Inspection

Has the circuit breaker or motor overload relay tripped?

Ensure the compressor is not reset and run again

Check the current oil level in the compressor

Is the oil return visible in the compressor?

Drain the old oil from the compressor

Refill the compressor with new oil

Is the oil level within the recommended range after replacement?

Record full load performance data on the log sheet

Enter the current approach temperature for the evaporator

Enter the current approach temperature for the condenser

Is the approach for either vessel more than 2°F above the clean condition?

Drain the water from the vessel

Check flash economizer feed line sightglass for bubbles

Are bubbles visible in the sight glass?

Add refrigerant through the charging valve on the evaporator feed line

Ensure sight glass is clear at all operating conditions