Dunham-Bush Rotary Screw Water Chiller WCFX36

Record full load performance data on the log sheet

Check if the approach for either vessel increases by more than 2°F above the approach recorded at clean conditions

Drain the water from the vessel

Brush each tube individually with a tube cleaning brush

Replace the headers, ensuring gaskets are properly positioned

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

Check if the condenser drain sight glass is clear

Is the sight glass clear at all operating conditions?

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 adequate after replacement?

Inspect for physical disfigurement of the gasket

Check for signs of deterioration

Does the gasket need renewal based on inspection results?

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?

Do not reset and try to run the compressor again