FM01-738 Replacing the HHC 900 Blower Assembly, 240V, International

Turn off power switch, and unplug the unit or turn off the wall circuit breaker.

Remove the four screws located on the control panel.

Remove the five screws located on the rear panel of the control panel.

Remove the six screws (three on each side) securing the top cap to the unit.

Carefully remove the top cap from the unit.

Locate the existing motor and blower assembly on the blower box assembly.

Locate the three screws that secure the motor assembly in place.

Remove the screws and remove the motor assembly from the blower box assembly.

After removing the old motor assembly, examine the existing blower wheel.

Measure the height of the blower wheel.

Included are two blower wheels, their heights are 1-7/8 inch and 1-1/2 inch.

After identifying the height of the existing blower wheel, secure the corresponding blower wheel of the same height.

Using a 5/64 inch allen wrench, make sure that the set screw on the blower wheel is backed out so that the blower wheel can slide onto the shaft.

Slide the blower wheel onto the shaft.

Do one of the following:

1. For the 1-7/8 inch Blower Wheel

   Before tightening the set screw, place one 1/8 inch spacing bars between the motor mounting plate and the blower wheel. This will ensure 1/8 inch spacing.

    

   

2. For the 1-1/2 inch Blower Wheel

   Before tightening the set screw, place two 1/8 inch spacing bars between the motor mounting plate and the blower wheel. This will ensure 1/4 inch spacing.

Secure the new blower motor assembly.

Place the new gasket onto the blower housing and mount the new blower motor assembly onto the housing using the existing screws.

Replace the top cap and control panels by reversing steps 2-5.

Restore power to the unit.