Heatmor 400-4S, User Manual

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4) Stop the flow 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.
5) Loosen the hose clamps and remove the door hoses from the firebox door.
6) Lift the door off the hinges.
7) Remove the handle from the firebox door.
To replace the firebox door, follow these steps:
1) Replace the handle onto the new door just as it was removed.
2) Hang the firebox door on the hinges.
Note: Ensure there is a tight seal around the firebox door frame while it is closed and latched shut. The
firebox door must remain parallel with the door frame.
3) Close the firebox door and if needed adjust the firedoor handle bolts to ensure a tight seal.
4) Re-attach the door hoses, tighten the hose clamps, and unclamp the vice-grips.
5) Light a fire in the firebox; 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.