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12425-10-1008Page 6
Note: No vent equipment supplied with furnace.
4" Oval (all parts purchase locally)
1. Type B-1 oval pipe
2. Single story type B-1 gas vents require a baseplate and one pair of
ceiling plate spacers.
3. Multi-story type B-1 gas vents require a baseplate, one pair of ceiling
plate spacers at the first floor ceiling and one pair of fire stop spacers
at each successive ceiling level.
Type B-W gas vent pipe is available for single story or
multi-story installations. Type B-W gas vent pipe is to be
used with the Listed base plate, ceiling plate spacers and fire
stop spacers.
Insulated Vent Enclosure
Gravity vented wall furnaces installed in buildings with flat roofs can have
poor venting. The cold vent pipe will have a delay in proper venting and cause
the wall furnace to shut "off" by the vent safety switch. To prevent delayed
venting as well as condensation of flue products an insulated vent enclosure
is recommended.
Use Type B vent pipe and maintain at least a one inch (25mm) clearance to
combustibles.
Use metal thimble to protect vent pipe as it passes through combustibles.
Baseplate Gasket is factory installed on header. Baseplate attaches to header
with screws. B-vent snaps into and is attached to baseplate. Minimum height
of vent pipe must be six feet (1.8m) above header.
Stud space around gas vents must be free of obstructions and building paper.
Uninsulated Single-Wall Metal Pipe shall not be used outdoors in cold climates
for venting gas utilization equipment.
Attention: The main burner uses room air for combustion. As the gas/air
mixture is injected into the main burner, there is also the flow of dust and lint
particles into the main burner.
Dust and lint accumulation inside the main burner will result in a yellow main
burner flame and possible sooting inside the combustion chamber and vent pipe.
To clean main burner refer to Page 13, "Proper Main Burner Flame."
RECOMMENDED VENT CONFIGURATION