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CHAPTER 20
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 firebox 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, which allows air to enter
the air box reducing the risk of a flashback. A keyed lock is installed on the
left side of the door providing an easy way to ensure the door cannot be
opened causing 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 doorframe. This will keep cold air from entering
the heated air cavity, which provides the air box and firebox with air.
Removal and Replacement
To remove the outer door, the lock handle must be unlocked and opened.
Pick up the old door from the hinges and place and secure the new door into
position. Test the door to ensure a tight seal to the doorframe of the furnace.
Roof of the HEATMOR™
Principle of the Roof
The roof of the furnace is one solid piece of roofing 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.
Removal and Replacement
If the roof has been damaged it can be replaced. Follow these steps or contact your local dealer.
1) Remove the silicone from around the lift hook and vent pipe.
2) Remove all roof screws holding the damaged roof secure.
Outer Front and Back Door
Lockable Door
Roof
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.
Summary of Contents for 400-4S
Page 1: ...Outdoor Furnaces TM SAVE THESE INSTRUCTIONS...
Page 10: ...5 HEATMOR Stainless Steel Outdoor Furnace Model 400 4S Chapter 1...
Page 73: ...68...
Page 88: ...83 PROBLEM CAUSE SOLUTION PROCEDURE...
Page 92: ...87 Outdoor Furnaces...
Page 93: ...88 NOTES...
Page 94: ...89 wiring diagram...
Page 95: ...90 Revised Manual on 07 11 12...