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DRAFT ASSIST FAN WIRING
Black
wire
Red wire
When to use the draft assist fan
Use the fan during light-up, for higher fuel settings or if conditions are unusually windy.
Draft generated within the chimney is responsible for drawing fresh air into the burner
where it feeds the flames. During the lighting procedure while heat & draft are
beginning to develop in the burner & chimney, the draft assist fan will provide an
adjustable supply of air which will make it easier to balance combustion.
Note: Without a draft assist fan, you must rely on fuel adjustment alone to keep the
flames in the burner burning clean (blue to yellow) and reduce fuel if the flames
become too rich (orange to red)
When to turn off the fan
Once the appliance has reached operating temperature, when set to fuel
settings below #3 the draft assist fan can typically be shut-off.
When set to fuel settings 4 or 5, the extra assistance from the draft assist fan
may still be needed.
For installs set up with the minimum permissible chimney height, or in installs
where flue elbows are present, the draft assist fan may be required to balance
lower fuel settings also.
How often should the fan be used?
Avoiding frequent use of the fan by running the appliance in a balanced way with a clean flame
and burner, in order to encourage a strong draft, will prevent the fan motor from burning out
prematurely.
Running the fan continuously may also solidify soot deposited within the burn chamber into
hard carbon which is more difficult to remove. Hard carbon deposits are also more likely to plug
the air holes in the burner (A) and prevent it from getting the air it needs.
This appliance is equipped with a 12v, 4 amp, draft assist fan. While running the fan is not required in order to light and operate the
appliance, it is strongly recommended as it will offer you a greater degree of control over the quality of combustion in the burner.
Burner air
holes
A.
When to avoid turning on the fan?
If the flames look balanced (blue to yellow in color) but won’t rise above the burner ring, these things
combined indicate an unbalanced fuel-air ratio with too much air available.
Older models
An older appliance may be equipped with a different fan and motor from the current models. On some
older models, the fan will need to be adjusted to a higher speed to make it spin. Once the fan is running, the
speed can be reduced to the desired setting.
Install notes:
Use 18 gauge wire for all connections.
Wherever possible, ensure a weatherproof wire connection such as a soldered or push-on connection.
On fan assemblies with a metal housing or bracket, place any rubber bushings or washers provided so that
they sit in between the fan assembly and the main body of the appliance. The purpose of these bushings is
to dampen vibrations or sound from the motor from becoming amplified inside the appliance.
FAN SPEED
CONTROL
ON/OFF
SWITCH
5 amp fuse
DOWN
FIG 54
FIG 55
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