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12425-7-0406
Page 13
VENT SAFETY SHUTOFF SYSTEM
This appliance must be properly connected to a venting system.
This appliance is equipped with a vent safety shutoff system.
Warning: Operation of this wall furnace when not
connected to a properly installed and maintained venting
system or tampering with the vent safety shutoff system
can result in carbon monoxide (CO) poisoning and possible
death.
This furnace is equipped with a manual reset vent safety switch.
The manual reset vent safety switch will cause gas flow to the main
burner to "shut off" due to improper venting or a blocked flue.
To reset the manual reset vent safety switch:
1. Remove outer casing.
2. Depress manual reset button. The manual reset vent safety
switch is located on the draft diverter.
3. Replace outer casing.
If the
manual reset vent safety switch continues to "shut off" the
gas flow to the main burner a qualified service person must be
contacted to inspect for improper venting, blockage in the vent
pipe or the manual reset vent safety switch for being defective.
Figure 8
PROPER MAIN BURNER FLAME
The correct flame will be a short blue inner flame with a much
larger light blue outer flame. The burner does not have a primary
air adjustment. The flame will be proper if the factory-set pressure
and orifice are used. After the furnace has begun operating, cleaning
of the burner may be needed for proper flame, examine at least 2
times per season.
To clean burner ports, disconnect the gas supply to the valve.
Remove the burner assembly from the combustion chamber.
Remove pilot burner from main burner and then remove the main
burner. Force water into the ports and blow dry with vacuum
cleaner air, or low pressure compressed air.
The correct flame will be blue, extending past the thermopile. The
flame will surround the thermopile just below its tip.
Natural gas pilots require adjusting when the inlet gas pressure is
above 5" w.c. (1.245kPa). Remove the pilot cover screw on the
control valve and turn the adjustment screw clockwise to reduce
flame. Replace pilot cover screw to eliminate gas leaking at that
control valve opening.
LP gas (propane) will not require adjustment.
After use, cleaning may be required for the proper flame.
Examine the pilot flame before and during each heating season.
PROPER PILOT FLAME
Figure 9
Figure 10