3.Install two of the cap screws into the threaded holes in bushing, and turn them by hand until they bottom against the front surface of the blade. NOTE: The threaded holes within the bushing are provided for disas- sembly purposes only. Do not attempt to use these holes for reassembly. They will not allow the parts to lock onto the shaft thereby causing a hazardous operating condition.
4.Block blade to prevent it from turning, and gradually turn the cap screws (up to 1/4 turn at a time) until the blade breaks loose from the bushing and motor shaft. Carefully remove bushing and blade. With the blade free from the bushing,a wheel can be used to pull the bushing off of the motor shaft.
Note: During manufacturing, the blade and bushing are balanced together and are marked with two small dots to identify their original alignment position. Check the bushing and propeller to make sure they have alignment marks. Mark the alignment of the propeller and bushing, if necessary.
FAN MOTOR REMOVAL
In the event of motor failure, remove the motor as described, and take it to the nearest service station. An autho- rized service station is the only place that can provide possible motor warranty. Motor service and repair at other places will be at owners expense.
If the service station determines motor failure is caused by faulty material or workmanship within the warranty period, repair will be covered under the warranty. Motor failure caused by external sources will result in a charge to the owner for repair.
1.Make certain power is shut off and locked out. Remove fan guard and blade.
2.Remove cover from fan/heater control box, and disconnect the motor lead wires from within the box.
Note: Tag or otherwise identify wires for ease of reassembly.
3.Remove motor mount bolts. If there are shims between the motor and its base, note their location so they can be properly installed during reassembly.
4.Disconnect the upper end of the motor conduit, then carefully pull the wires through the hole in the fan/heater housing. Remove motor from the fan/heater unit with the conduit still attached. If motor requires service, take it to an authorized service station.
5.To reinstall motor, slide onto motor base plate and replace shims (if required) between motor base and plate. Reinstall motor mount bolts and washer, but do not fully tighten at this time.
6.Reinstall conduit and wires through hole in fan/heater housing and carefully connect all electrical wiring.
7.Adjust position of motor by temporarily mounting fan blade on motor shaft. Rotate fan blade by hand, making the necessary adjustments, so the tip clearance between blade and housing is uniform. If required, remove the fan blade and fully tighten all four motor mount bolts.
Note: Make sure to install and tighten the blade in accordance with previous instructions.
HEATER PARTS REMOVAL AND INSTALLATION
Most of the heater parts can be removed by simply identifying any attached wiring, and then disconnecting the obvious mounting parts.
1.Flame sensor: Disconnect the wire connector, and unscrew the flame sensor out of its mounting bracket.
2.Gas Solenoid valve coil(s): Unsnap either the plastic cap, or the metal clip on the gas valve, and slide the housing and coil off the valve stem and body. Do not energize the coil when it is removed, as the coil may become damaged due to excessive current flow.
3.Regulator and gas solenoid valve(s): The gas regulator and solenoid valve(s) are directional and must be connected as indicated by the markings near the port openings. Make sure gas is shut off and purged from the system before removing parts.
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