64
EXTERIOR CLADDING AND INSULATION
Outer Front Door of the HEATMOR™
Principles of the Outer Front Door
The outer door of the furnace is an exterior
door, which is insulated to retain the heat
that radiates from the rebox door and water
jacket surface. The door provides a lockable,
protective surface to prevent any hot surface
from being exposed.
Operation of the Outer Front Door
The outer door is hinged and opens to the right of the furnace. As the door opens, it
releases the Automatic Fan Switch push bar, which allows air to enter the air box reducing
the risk of a ashback. A keyed lock is installed on the left side of the door providing an
easy way to ensure the door cannot be opened allowing untrained users to be injured.
Maintenance / Result
Keep the door free from any obstruction and ensure that the inner seal
of the door seals against the door-frame. This will keep cold air from
entering the heated air cavity, which provides the air box and rebox
with air.
Removal and Replacement
To remove the outer door, the lock handle must be unlocked and
opened. With a socket, loosen and remove the bolts attaching the
door to the outer frame of the furnace.
Place and secure the new door into position. Test the door to ensure
a tight seal to the door-frame of the furnace.
Roof of the HEATMOR™
Principle of the Roof
The roof of the furnace is one solid piece of roong steel
creased in the center. This provides a dry covering to
protect the insulation of the furnace.
Maintenance / Result
Inspect the roof of the furnace once a year to verify that
none of the roof screws have broken. A large number of
broken roof screws can allow damage to the furnace roof. Ensure the lift hook and chimney
are sealed so no water
can enter into the roof insulation.
ABSOLUTELY NO FIRE IN THE FIREBOX WHEN PERFORMING
THIS REPAIR. DO NOT PERFORM THIS REPAIR WHEN UNIT
WATER TEMPERATURE IS UNSAFE. ALWAYS WEAR PROPER
PERSONAL PROTECTIVE EQUIPMENT.
Chapter 17
Locable Door
Roof
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