1018029-A
Page 14
PROPER BURNER FLAME
A proper flame will have a dark blue inner mantle that sits
right on top of the burners with a lighter blue outer mantle
rising above the burner, (See Figure 15). There may be some
yellow where the pilot flame and burner flame meet. There is
no primary air adjustment on the burner, and proper flame is
assured since the correct manifold pressure and orificing has
been done at the factory.
NOTE: It is advised that the burner flames be checked at
least twice during the heating season for any changes in
burner flame characteristics.
The appliance area must be kept clear and free from
combustible materials, gasoline, and other flammable vapors
and liquids. This heater comes from the factory with the proper
burner orifice for elevations up to 2,000 feet. Heaters installed
above 2,000 feet must be derated 4% for every 1,000 feet. For
the proper orifice size find the Model Number and elevation on
the orifice chart (See Controls). Replace burner orifice.
OPERATION
This heater is equipped with a slow opening gas control.
On a call for heat the gas valve does not snap-open to full
manifold pressure, but opens with a gradual increase to
normal manifold pressure. The time lapse from the call for
heat to normal operating pressure is two to five seconds.
The slow open feature assures a safe, less noisy ignition.
After the heat exchanger has warmed sufficiently, the fan
will automatically come on to efficiently transfer the heat
into the room.
FIG. 15
5”
to 7”
Approx. 1”
