HeatPack Furnace Installation and Operation Manual
48
The following figure shows the position of the air control damper
(A)
according to the
position of the air control damper switch
(B)
.
10.3.5 Building different fires for different needs
Using the air control is not the only way to match the furnace’s heat output to the heat
demand. Your house will need far less heat in October than in January to be kept at a
comfortable temperature. If you fill the firebox full in fall weather, you will either overheat
the space or turn the furnace down so much that the fire will be smoky and inefficient.
Here are some suggestions for building fires to match different heat demand.
10.3.5.1 Small fires to take the chill off the house
To build a small fire that will produce a low heat output, use small pieces of firewood and
load them crisscross in the firebox. The pieces should be only 3” (76 mm) to 4” (102 mm)
in diameter. After raking the coals, you can lay two pieces parallel to each other corner to
corner in the firebox and lay two more across them in the other direction. Open the air
control fully and only reduce the air after the wood is fully flaming. This kind of fire is good
for mild weather when you are around to tend the furnace and should provide enough heat
for four hours or more. Small fires like this are a good time to use softer wood species so
there will be less chance of overheating the house.
10.3.5.2 Long lasting low output fires
Sometimes you will want to build a fire to last up to eight hours, but don’t need intense
heat. In this case use soft wood species and place the logs compactly in the firebox so the
pieces are packed tightly together. You will need to fire the load hot for long enough to fully
char the log surfaces before you can turn the air down. Make sure the fire is flaming
brightly before leaving the fire to burn.
Summary of Contents for HeatPack DF00500
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Page 64: ...HeatPack Furnace Installation and Operation Manual 64 13 Exploded diagram and parts list...
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