Advantage Temperature Controller SRG-620

Disengage operations and ensure 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.

Drain machine by removing the pump casing drain plug.

Remove heater’s junction box cover to locate wiring connections.

Note the wiring connections for correct reinstallation.

Describe the function of the temperature probe

Verify automatic gain calibration within the controller electronics

Locate the zero adjustment potentiometer on the CPU

Is the sensor probe error indicated by three dashed lines on the temperature display?

Shake out any water from the connection

Inspect the heater contactor for signs of wear or pitting

Is the heater contactor cycling frequently?

Replace the heater contactor if wear or pitting is observed

Inspect the pump motor starter for signs of wear or pitting

Replace the pump motor starter if wear or pitting is observed

Ensure all components are not overheating

Consult with Advantage Service Department

Prepare for field voltage changeover

Check items for replacement or rewiring

Perform field voltage changeover

Disengage operations and verify system pressure is relieved

Gain access to the electrical panel

Rewire the heater to the new voltage

Shut down unit operations according to section 3.4 in the manual

Ensure proper lock-out procedures are followed

Is the system pressure eliminated and the unit’s pressure gauges reading '0' pressure?

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

Remove the electrical connections to the pressure switch