Advantage Temperature Control Unit SK-645

Disengage operations and ensure all system pressure is relieved

Verify the unit's pressure gauges read '0'

Verify the Power light on the display is 'off'

Remove the lift-off access panel and set aside

Drain machine by removing the pump casing drain plug

Unplug the sensor probe connection

Shake out water from the service connection

Replug the sensor probe connection

Did the error display change to Solid Red?

Press the Start push button to clear the error display

Stop process operations as described in section 3.4 of the manual

Ensure all process pressure is relieved and pressure gauges read '0' pressure

Disengage process operations and verify all system pressure is relieved and the unit's pressure gauges read '0'.

Disengage main power supply and verify the Power light on the display is 'off'.

Remove the lift-off access panel and set aside.

Disconnect the valve wiring harness.

Remove the AVT valve's drip cover.

Remove the 2 mounting screws securing the motor/gearbox assembly to the valve bracket.

Reduce process water temperature to below 85°F.

Verify all system pressure is relieved and the pressure gauges read "0".

Verify the Power light on the display is "off".

Remove the lift-off access panel to access the cooling cylinder.

Shut down unit operations according to section 3.4 in the manual

Ensure proper lock-out procedures are followed

Confirm system pressure is eliminated and pressure gauges read '0'

Drain unit by removing the pump casing drain plug

Remove the capillary connection from the cooling cylinder to the pressure switch

Remove the brass elbow mounted on the pressure switch

Disconnect the electrical connections to the pressure switch