INSTALLATION INSTRUCTIONS
Gas Furnace: (F/G)MAC
40
440 01 4201 01
Specifications subject to change without notice.
Configure the Furnace
!
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.
With the furnace installed in the required position, remove the
desired knockouts from the casing. It will be necessary to
remove one knockout for the vent pipe and the other knockout
for the combustion air connection.
Use a flat blade screwdriver and tap on the knockout on
opposite sides, where the knockout meets the casing. Fold the
knockout down with duct pliers and work the knockout back
and forth until it is removed. Trim any excess metal from the
knockout with tin snips.
The vent elbow can be rotated to the required location on the
casing if necessary. See
Figure 54
To rotate the vent elbow:
1. Loosen the clamp on the inlet of the vent elbow attached
to the inducer.
2. Rotate the vent elbow to the required position. There are
rounded notches in the vent elbow to align it with the
inducer for each orientation.
3. Tighten the clamp around the vent elbow. Torque the
clamp to 15 lb-in. See
Figure 40
through
Figure 45
,
Figure 55
and
Figure 56
.
Figure 54
Inducer Vent Elbow
−
Variable
MODUL ATING INDUCER ASSEMBLY
Representative drawing only, some models may vary in appearance.
INDUCER OUTLET
VENT ELBOW CL AMP
TORQUE 15 LB
−
IN.
VENT ELBOW
VENT PIPE CL AMP
TORQUE 15 LB
−
IN.
Figure 55
Horizontal Left Vent Configuration
HORIZONTAL LEFT VERTICAL VENT
Representative drawing only, some models may vary in appearance.
HORIZONTAL LEFT, LEFT VENT
Representative drawing only, some models may vary in appearance.
HORIZONTAL LEFT, RIGHT VENT
Representative drawing only, some models may vary in appearance.