Dexter Laundry T-750 C4 Installation And Parts & Service Manual page 69

1. On the set screws and torque to 165 in/lbs.
2. The Motor is mounted with 4 bolts to the motor mounting bracket on the rear of the dryer.
3. Reassemble in reverse order.
Air Flow Switch Operation And Adjustment
The air flow switch assembly is part of the ignition safety circuit and insures
that the burners don't operate unless there is air flow. When the drive motor
and blower are running the flat actuator is pulled in against the back of the
dryer closing the switch. If this doesn't happen ignition will not occur. The air
flow switch assembly is mounted by two screws through the bracket. It can be
adjusted by loosening these mounting screws and moving the switch forward or backward.
Ignition Transformer Fuse
The 1.5 amp fuse protects the ignition transformer. To remove it just twist and pull it out.
Electronic Ignition Module
This machine uses an electronic spark ignition system to directly light the burners.
1. The electronic ignition module is located inside the electrical box. This is the metal box on the
back of the tumbler area directly to the left of the final drive pulley.
2. The red wire from the transformer traveling thru the 1.5 amp fuse and into the module supplies
the 24VAC required to operate the entire direct ignition system.
3. The black colored hi-voltage wire (spark plug type) plugs onto the post connector on the module,
and the multi-wire plug fits into the side of the module.
Spark Ignition Module Removal
Without mounting bracket
Remove all of the terminals of the wiring harness attached to the ignition module. Then, remove
the terminal of the hi-voltage cable attached to the ignition module. Lastly, remove the mounting
screws holding the ignition module in the control box. If there is no spark or intermittent spark,
check black hi-voltage lead wire for damage
NOTE:
Proper grounding of the ignition system (yellow
wires) is very critical for proper ignition
sequence.
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