Dunham-Bush Rotary Screw Water Chiller WCFX24

Wipe down external surfaces of unit

Inspect control panel for loose wires

Inspect control panel for burned contacts

Inspect control panel for signs of overheated wires

Unit Restart and Performance Check

Check flash economizer feed line sightglass during unit operation

Are bubbles visible in the sight glass?

Add refrigerant through the charging valve on the evaporator feed line

Is the condenser drain sight glass clear?

Is the sight glass clear at all operating conditions?

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 tubes

Remove the headers from the vessel tubes

Brush each tube individually with a tube cleaning brush with stiff nylon bristles

Is the compressor showing oil return?

Is the low oil level switch functioning properly?

Drain the old oil from the compressor

Refill the compressor with new oil

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