2
Table 2
Kit Contents
Quantity
Description
1
Blower Cut---off
1
Blower Housing Assembly
2
Hex Head Screw --- #10 x1/2”
3
Hex Head Screw --- #8 x 3/8”
2
Hex Head Screw --- #8 x 3/4”
8
Hex Head Screw --- #8 x 1/2”
INSTALLATION
Unit Shut Down
!
WARNING
ELECTRICAL SHOCK AND FIRE HAZARD
Failure to follow this warning could result in personal injury,
death, and/or property damage.
Turn off the gas and electrical supplies to the furnace and install
lockout tag before performing any maintenance or service.
Follow the operating instructions on the label attached to the
furnace.
1. Set room thermostat to lowest setting or “OFF.”
2. Disconnect power at external disconnect, fuse or circuit
breaker.
3. Turn off gas at external shut--off or gas meter.
4. Remove outer doors and set aside.
5. Turn electric switch on gas valve to OFF.
Vent Pipe Removal
NOTE
: If the vent and/or the combustion air pipes are installed
through the blower compartment, it will be necessary to remove
the vent pipes. Follow the steps below to remove the vent and
combustion air pipe.
1. Support the vent and combustion air pipe as close to the
furnace as possible to prevent damage to the vent system.
2. Loosen the upper clamp around the vent and combustion air
pipe supports external to the furnace. See Figure 1 and
Figure 2.
3. Raise each pipe up separately to determine if the vent and
combustion air pipes are coupled to the pipes internal to the
furnace at this point.
4. If the pipes are coupled at this point, lift the pipes out of the
vent and combustion air pipe supports and move the pipes
out of the way. Secure the pipes if necessary. Otherwise, it
will be necessary to cut the pipes at a point external to the
furnace casing.
5. After disconnecting or cutting the vent and combustion air
pipes, loosen both clamps at the vent and combustion air
pipe grommets attached to the blower shelf of the furnace.
See Figure 1 and Figure 3.
NOTE
: If the grommets at the blower deck are damaged during
disassembly, replace the grommets. Do not operate the furnace
without grommets that seal the vent and combustion air pipes at the
blower deck.
!
WARNING
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal injury or
death.
To route the vent pipe and combustion air pipe through the
furnace, the manufacturer supplied kit must be used. Failure to
properly seal the blower compartment from the furnace vestibule
could result in the circulation of carbon monoxide throughout
the structure. The vent pipe and combustion air pipe must be a
continuous pipe while passing through the blower compartment.
Seals supplied in this kit must be installed per the instructions
provided. Follow all procedures outlined in these instructions.
6. Loosen clamp for the vent pipe at vent elbow on the inducer
assembly. See Figure 3.
7. Remove remaining vent pipe and combustion air pipes
through the furnace casing and set aside. If the vent and
combustion air pipe are glued to the plastic adapters
external to the furnace, remove the screws that secure the
adapters to the furnace casing to remove the pipes. See
Figure 1 and Figure 2.
Figure 1
Vent/Combustion Air Pipes
Through Blower Compartment
(Downflow Configuration)
338106
