International comfort products B Series Installation Instructions Manual page 44

INSTALLATION INSTRUCTIONS
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
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.
Install the Vent and Combustion Air Pipes
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. (See Figure 13)
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 50 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 51 through Figure 54.
Figure 50 Inducer Vent Elbow − PSC
INDUCER OUTLET
44
monoxide throughout the
PSC INDUCER ASSEMBLY
A13075A
VENT ELBOW CL AMP
TORQUE 15 LB−IN.
VENT PIPE CL AMP
TORQUE 15 LB−IN.
VENT ELBOW
INDUCER OUTLET CHOKE
40,000 BTUH MODELS ONLY
A13075B
Specifications subject to change without notice.
Figure 51 Upflow Configurations
UPFLOW LEFT − VENT CONFIGURATION
Representative drawing only, some models may vary in appearance.
UPFLOW RIGHT − VENT CONFIGURATION
Representative drawing only, some models may vary in appearance.
UPFLOW VERTICAL − VENT CONFIGURATION
Representative drawing only, some models may vary in appearance.
Gas Furnace: N9MSB
A11309
A11308
A11310
440 01 4102 01