HI 110 / 200 / 300
Maintenance
ghi_tx001450gb.fm
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7.2
Inspecting the Heat Exchanger
Introduction
The heat exchanger consists of the combustion chamber and an outer shell. As
intake air flows over the hot combustion chamber, it collects heat. The heated
intake air is then blown out of the supply ducts.
Reasons for
inspection
A cracked or damaged heat exchanger is hazardous! Poisonous carbon monoxide
gas can escape from the heat exchanger and enter the clean air stream.
Combustible gases may also ignite the surrounding insulation material, causing a
fire.
To ensure a safe operating condition, the heat exchanger must be inspected
regularly for damage.
When
Inspect the heat exchanger at least twice a year as part of the regularly scheduled
maintenance program.
Inspect the heat exchanger more often if any of the following conditions exist:
The machine has been transported over extremely rough roads or terrain.
The machine / transport vehicle has been involved in an accident.
The machine has been dropped.
There is visible damage to the heater shell.
The burner has been improperly adjusted and is over-firing.
There is doubt about whether regularly scheduled maintenance has been
performed.
The safety systems have been bypassed by improper or modified wiring.
NOTICE:
If the machine wiring has been altered, correct the wiring before
operating the machine.
Requirements
Power disconnected from the machine.
Machine cool.
Do not inspect a hot heat exchanger.
Assistant to aid in the inspection
Lifting equipment
Shop light or flash light
Inspection mirror
This procedure continues on the next page.
DANGER
Asphyxiation hazard. Gases escaping from a cracked or damaged heat exchanger
contain carbon monoxide (CO). This is a poison you cannot see or smell. CO can
kill you in minutes!
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Do not operate the machine if it has a cracked or damaged heat exchanger.
