TM 5-4520-241-14
4-41.
IGNITER.
a. Removal.
WARNING
The ignition system of this space heater contains dangerous voltages which can
cause severe electrical shock. Be sure to disconnect the power plug before
repairing the heater.
(1) Open the front and side access doors.
(2) To remove the igniter (9, fig. 4-30), unscrew the compression nut on igniter cable (8), and remove the cable.
(3) Remove the igniter from the burner head.
b. Cleaning and Inspection.
WARNING
Clean parts in a well-ventilated area. Avoid inhalation of solvent fumes and
prolonged exposure of skin to cleaning solvent. Wash exposed skin thoroughly.
Dry cleaning solvent (fed. spec. P-D-680) used to clean parts is potentially
dangerous to personnel and property. Do not use near open flame or excessive
heat. Flash point of solvent is 100 F (38 C).
(1) Clean the igniter with a cloth dampened with an approved cleaning solvent (fed. spec. P-D-680). Remove
any whiskers of carbon which may be bridging the gap between tip and outer shell.
(2) Inspect the tip and outer shell for burning and pitting. Inspect ceramic parts for cracks and breaks. Inspect
threads for damage. Replace a defective igniter.
(3) The electrode must be flush with the end of the igniter, or recessed up to 0.010 inch. Replace the igniter if it
exceeds this wear limit.
c. Replacement . Install in the reverse order of removal.
4-79
