SERVICE
HEATER PARTS REMOVAL AND INSTALLATION
Most of the heater parts can be re- moved by simply identifying any at- tached wiring, and then disconnect- ing the obvious mounting parts.
1.Flame sensor: Disconnect the wire connector, and unscrew the flame sensor out of its mount- ing 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 be come damaged due to exces- sive current flow.
3.Regulator and gas solenoid valve(s): The gas regulator and so- lenoid valve(s) are directional and must be connected as indicated by the markings near the port open- ings. Make sure gas is shut off and purged from the system before re- moving parts.
Note: When installing a liquid
gas solenoid valve on LP models, do not over tighten the connection into the inlet side, as the inlet orifice may become partially blocked.
b. Disconnect gas solenoid valve coils. Be sure to mark which one goes where.
c. Lift pipe (with orifice, solenoid valve and other parts attached), straight up and remove from fan/ heater housing. Orifice and other parts can now be removed from pipe train, if desired.
5.Reassemble: To reassemble parts, reverse the disassembly pro- cedure and check the following:
a.Makesureallpartsarethoroughly cleaned and open.
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b. Use a dependable brand of high temperature pipe caulking compound when assembling gas connections. Apply only a light coating onto male threaded end of fittings.
c. Solenoid valves and gas regula- tors are directional and must be properly installed. Do not attempt to connect gas solenoid valve by applying force to the valve core stem as it may ruin the unit.
d. Make sure all electrical wires are properly connected. Refer to wiring diagrams.
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4.Main Gas Orifice: With fuel shut off and gas purged from system, proceed as follows:
a. Disconnect the plumbing sup- port brackets from the pipe train.
This view of the dryer heater shows
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