42
Rev. 05/2020
43
Rev. 05/2020
Firebox Door Hinge
Principle of the Firebox Door Hinge
Supports the firebox doors and allows for adjustment.
Maintenance / Result
The adjustable hinge works in conjunction with the door
handle and the firebox door. The hinge has slotted holes
so the firebox door can be adjusted to provide a solid fit
against the firedoor frame. Secure and stable, the hinge
allows the firebox door to swing free and smooth.
Firebox Door Latch
Principles of the Firebox Door Latch
The safety latch is designed to provide additional safety
by preventing the firebox door from opening too quickly,
potentially allowing a “flashback.” The latch is adjustable
and replaceable.
Maintenance/result
The latch is adjustable with the two bolts. The two bolts
must be tightened firmly. When properly adjusted, the
firebox door handle will close and open with ease and
create a perfect seal around the door.
Firebox Door Magnet
Principles of the Firebox Door Magnet
The firebox door magnet provides a means of holding
both
the outer front door and the
firebox door completely open while the operator is loading coal into the HEATMOR™.
Operation
1) Open the firebox door as you step backwards towards the exterior door. This allows
you to be out of the way if there is a “flash back” or smoke exiting the door opening.
2) Stick the firebox door handle onto the firebox door handle magnet provided on the
outer door.
3) To remove the firebox door from the magnet, turn the handle to the left and pull the
inner door away by the handle.
Firebox Door Gasket
Principles of the Firebox Door Gasket
The firebox door gasket creates an airtight seal between
the firebox door frame and the firebox door. It is a pliable
seal that can be removed and replaced if damaged or
worn.
Maintenance/Result
Occasionally, scrape the perimeter of the firebox door to
keep it clean.
Do not cut
, scrape or disturb the pliable seal.
Keep the door correctly adjusted on the hinges to ensure the pliable seal is being forced
against the firebox door frame. Keep all nuts and bolts on the handle, and latch and hinges
properly adjusted.
Firebox Door Hinge
Firebox Door Magnet
Firebox Door Gasket
The seal itself consists of a fiberglass rope in the groove of the firebox door, covered with
high temperature silicone.
Failure to manage and maintain the firebox door gasket could result in air entering into the
firebox when the combustion air fans are off or smoke escaping around the seal when the
combustion air blowers are running.
Air entering the firebox when the
fans are off
results in the coal continuing to smolder,
resulting in the furnace overheating and more than a “wiff” of smoke emitting from the
chimney. Often, this type of smoke has an unpleasant odor. Creosote will also be formed.
When the fans are running and the door seal is not sealing tightly, smoke will be forced
through the leaking door seal. This causes the front of the furnace to be smoke filled and
soon the front of the firebox will be covered with soot. Premature replacement of parts and
a buildup of creosote will result.
Removal and Replacement
1) Using a sharp knife, carefully cut away the silicone seal around the firebox door seal
channel.
2) Remove the old gasket from underneath the old silicone.
3) Remove all old silicone with a wire wheel or steel brush.
4) Replace with a single length of new gasket material. Do not pack or over stretch the
new gasket. Once in place allow, the material to “relax” before cutting to length.
5) Cover the door rope with silicone and tool to a smooth, flat, finish.
6) Leave the firebox door open for 24 hours to allow silicone to dry completely.
NOTE:
You will need 78 inches of 1 inch door rope material plus two tubes of caulking. The
door rope kit is available from your HEATMOR™ dealer.
Firebox Door Frame
Principles of the Firebox Door Frame
To provide a small edge that will seal into the
firedoor gasket to provide an airtight seal.
Maintenance / result
Keep the door frame cleaned down to the steel at
all times. Failure to do so results in a build up of
creosote, resulting in a barrier to an airtight seal, air
leaks and premature gasket replacement.
ABSOLUTELY NO FIRE IN THE FIREBOX WHEN PERFORMING
THIS REPAIR. DO NOT PERFORM THIS REPAIR WHEN UNIT
HTF TEMPERATURE IS UNSAFE. ALWAYS WEAR PROPER
PERSONAL PROTECTIVE EQUIPMENT.
Firebox Door Frame