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Rev. 05/2020
CHAPTER 9
SAFE FURNACE OPERATION GUIDELINES
Operation
Heatmor™ outdoor furnaces, model 100 CSS, 200 CSS, and 400 CSS are certified to burn
wood only. Refer to
WHAT SHOULD I BURN.
Burning of other materials may result in serious burns, health consequences, or damage to
this furnace and other components of the heating system and may void warranty.
1) Never open the firebox door if the combustion air blower is operating or if you suspect
a roaring hot fire inside the firebox.
2) Never open firebox door immediately after the combustion air blowers have shut
off. If the HTF temperature is very close to the high setting, you should assume the air
combustion fans have just shut off.
3) If there is more than a “wiff” of smoke coming from the chimney and the draft fan is
off, do not open the firebox door for at least 30-45 seconds. The burn cycle would
have just ended and the firebox will be full of unburned gases (smoke) that may ignite
when fresh air is introduced.
4) Load the unit with wood carefully, but quickly. After loading wood make sure all debris
is cleaned from the firebox doorframe and gasket. Then close firebox door securely.
5) Keep the firebox door, ash auger tube cover cap, top flue cover plate, and the outer
door of the HEATMOR™ furnace closed at all times except for servicing and refueling.
6) Keep the locking handle on the outer door locked at all times when not servicing or
refueling to reduce the risk of tampering and possible injury.
7) Never add HTF to the HEATMOR™ furnace if the internal HTF temperature is over
212 degrees Fahrenheit. Failure to adhere to this warning may cause a steam flash
and result in an explosion.
