Conair Thermolator Temperature Control Unit DI-18kW-230V

Unit and Surrounding Area Cleaning

Clean the unit and the area around it

Inspect air intake areas for obstructions

Are the air intake areas clear of obstructions?

Ensure the floor around the unit is dry

Disconnect and lockout the main power

Open the electrical enclosure door by turning the screw on the front panel counterclockwise

Disconnect the wires from the heater contactor

Label the wires for correct reconnection

Remove the contactor by unscrewing it

Discard the old contactor using the proper disposal procedure

Disconnect and lockout the main power

Open the electrical enclosure door

Turn the screw on the front panel counterclockwise to open

Locate the pump overload module attached to the pump motor starter

Disconnect the three power leads from the overload module to the pump motor

Note the placement of each lead and label as needed

Disconnect auxiliary wiring on the overload module

Loosen the three screws that connect the overload module to the motor contactor

Remove the impeller retaining assembly

Insert a screwdriver in one of the impeller waterway passages to hold the impeller steady while removing the retainer

Remove the impeller, ensuring not to lose the key, spring, and seal retainer

Was a bearing puller needed to remove the impeller?

Remove the seal, adapter, shaft, and flinger

Refer to the exploded view for detail

Disconnect the main power supply

Open the electrical enclosure door

Turn the screw on the front panel counterclockwise to open

Wire Labeling and Disconnection

Mark or label each wire connected to the motherboard

Ensure wires are labeled for correct terminal connection on new motherboard