L.B. White Pilot Light Ignition Installation And Service Manual page 61

Cleaning t t he F F an:
1. Shut off the gas supply to the heater and disconnect
the heater from its electrical supply.
2. Open or remove the access panel on the end of heater
opposite burner.
3. Disconnect the motor leads.
Motor a a nd F F an R R eplacement:
Follow steps 1 - 5 above and then proceed as follows:
1. Loosen the set screw(s) on the fan wheel.
2. Pull the fan wheel from the motor shaft. Use a wheel
puller, if necessary.
incorporate a wheel puller groove on the fan hub to
assist in fan removal.
3. Remove the nuts that hold the mounting plate to the
motor.
Nuts
August 1999
All L.B. White fan wheels
Models 346/348, 408/410, AB200, AB250
4. Remove the screws that secure the motor mount plate
to the fan housing.
5. Lift and pull the motor and fan assembly from housing.
6. Clean the fan wheel using a soft brush, rag, or
compressed air, paying particular attention to
individual fan blades to remove dirt build up.
4. To reinstall motor and wheel, reverse these
procedures.
IMPORTANT
Make sure that the fan does not rub on the inlet ring
of the fan housing.
Make sure set screw(s) of fan are on flats of motor
shaft when tightening.
Fan wheel to motor mount plate spacing must be at
proper clearance before tightening fan to shaft.
Refer to the following table and illustration.
Model
346/348
408/410
AB200, AB250
Servicing
Instructions
Fan and Motor
Clearance
1/4 in.
1/8 in.
CLEARANCE
8.2-3 3