Heatmor 200X - Firebox Door Removal and Replacement

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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
WHEN WORKING WITH WATER AND CHEMICALS.
Removal and Replacement
To remove the rebox door, follow these steps:
1. Turn off power to the combustion air blowers.
2. Ensure that the re in the rebox is extinguished.
3. Stop the ow of water from the water jacket through the door hoses by pinching the
two door hoses shut. Make a collar of cardboard between the jaws of two pairs of vice-
grips and clamp the door hoses tight at the center point of their length.
4. Loosen the hose clamps and remove the door hoses from the rebox door.
5. Loosen and remove the nuts and bolts holding the rebox door on to the hinge.
6. Remove the rebox door from the hinges and remove the handle from the rebox
door.
To replace the rebox door, follow these steps:
1. Replace the bolts and nuts onto the new door just as they were removed.
2. Hang the rebox door on the hinges loosely, with the nuts just slightly more than nger
tight, and attach the handle on to the rebox door allowing the handle to just barely
oat freely.
Note: Ensure there is a tight seal around the rebox door frame while it is closed and
latched shut. The rebox door must remain parallel with the door frame.
3. Close the rebox door and allow the handle to rest freely in the latch.
4. Get the rebox door parallel with the door frame ledge and tighten the nuts and bolts
a little more rmly onto the hinges. You may want to block up the rebox door until the
hinge is re-tightened.
5. Re-attach the door hoses, tighten the hose clamps, and unclamp the vice-grips.
6. Light a re in the rebox; then ensure that there are no air leaks. You will be able to
detect them by noticing smoke escaping through any air leaks, while the blowers are
running.
Note: If there is smoke leakage around the rebox door or one corner of the door, it
is adjustable.
7. Pull the door handle off the latch and allow it to rest loosely.
8. With two 1 1/8 inch wrenches, loosen the appropriate hinge (top or bottom) so it is
slightly more than nger tight. (Use only the bottom nut to adjust.)
9. While the bolt is slightly tight, rap the nut between the hinge halves, with a punch and
hammer.
10. With hinge bolt reset, tighten the lower nut.
11. The top and bottom rebox door should remain parallel with the door frame. If it tends
to sag, block it up with appropriate blocking until the hinge is re-tightened.