Toyotomi Toyoset NS-2800, Service Manual, Page: 19 / 47

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TASK 7: Clean the igniter
Remarks: Scrape any carbon deposits from igniter.
WARNING: Be careful when you remove igniter, it may be stuck. Excessive
force may crack the igniter.
TASK 8: Check air line and blower motor assembly. (at least every year)
Remarks: Replace the air line if it is worn or broken. Also, clean the exhaust fan if
necessary.
TASK 9: Check for carbon built-up on or inside fuel nozzle. (every year)
Remarks: Disconnect the copper fuel line from the fuel nozzle. Clean inside the nozzle
with the proper sized iron straight wire.
CAUTION: If any obstruction is felt, remove the fuel nozzle before proceeding.
4-3. Inspection of Exhaust/Air Lines
Verify that all air intake/exhaust pipes are free of leaks and that there are no loose
connections, as specified below.
(1) Inspection of Air Intake/Exhaust Pipe
A. Visually inspect both the air intake and exhaust pipes for obvious cracks, leaks or
loose connections. Black carbon deposits may be evidence of leakage.
B. Be sure that all pipes are installed tightly and securely, especially at the joints.
C. Turn the heater on.
D. Carefully apply a small amount of soapy water (with a paint brush) to the surface
areas of the air intake/exhaust pipes. Any leaks that may exist will be readily
identified by the appearance of bubbles.
(2) Return to Operating Condition
A. Push in the HEAT switch to
“
OFF
”
.
B. Dry all pipes with paper towels.
C. Repair any leaks that have been found (if necessary, replace the pipe or gasket).
4-4. Verification of Igniter Operation
Visually inspect igniter operation.
WARNING: Heater is operational during this inspection. Avoid direct contact with any
heated or electrical component.
(1) Prepare for Inspection; Remove cabinet B.