Lanair HI140i User Manual
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SECTION 20 HI-100i/HI-140i COMBUSTION
CHAMBER/HEAT EXCHANGER CLEANING
INSTRUCTIONS CONTINUED
20.4 Spray all of the screws with penetrating oil to prevent breakage before
removing any of the nuts that secure the combustion chamber access door.
Let set for five minutes to allow the oil to penetrate. Remove the heat
exchanger access panel by removing 1/2” brass hex nuts.
ACCESS DOOR
INSPECTION PORTS
20.4 Use an industrial type canister vacuum cleaner with a high efficiency filter, or
the ash rake provided with your furnace to pull the ash to the front of the heat
exchanger tubes for removal. Failure to clean heat exchanger tubes
annually will impair draft. Reaching through the burner opening vacuum or
shovel the ash from the combustion chamber. Inspect the combustion
chamber and target brick.
20.5 Remove all ash from the combustion chamber through the burner opening.
Use care when cleaning the combustion chamber area so the target brick is
not disturbed. Insufficient or irregular cleaning intervals will cause
inefficiency, random shutdowns, and extreme damage to the combustion
chamber.
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