Carrier 59SC6A Installation Instructions Manual page 41

59SC6A: Installation, Start-up, Operating and Service and Maintenance Instructions
Combustion Air and Vent Piping Insulation
Guidelines
NOTE: Use closed cell, neoprene insulation or equivalent.
The vent pipe may pass through unconditioned areas. The amount of
exposed pipe allowed is shown in
1. Using winter design temperature (used in load calculations), find
appropriate temperature for your application and furnace model.
2. Determine the amount of total and exposed vent pipe.
3. Determine required insulation thickness for exposed pipe length(s).
4. When combustion air inlet piping is installed above a suspended
ceiling, the pipe MUST be insulated with moisture resistant
insulation such as Armaflex or other equivalent type of insulation.
5. Insulate combustion air inlet piping when run in warm, humid
spaces.
6. Install the insulation per the insulation manufacturer's installation
instructions.
NOTE: Pipe length (ft. / M) specified for maximum pipe lengths
located in unconditioned spaces cannot exceed total allowable pipe
length as calculated from Table
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.
Near Furnace Vent Connections
Offsets in the vertical portion of the vent pipe should be made with 45
deg. elbows instead of 90 deg. elbows. Short horizontal runs of vent pipe
are difficult to pitch correctly and may trap water in the vent pipe.
Trapped water in the vent pipe may result in nuisance pressure switch
tripping.
Install the Vent and Combustion Air Pipes
With the furnace installed in the required position, remove the desired
knockouts or plugs from the casing. It will be necessary to remove one
knockout or plug for the vent pipe and the other knockout or plug for the
combustion air connection. See
The vent elbow can be rotated to the required location on the casing if
necessary. See Fig. 53. To rotate the vent elbow:
7. Loosen the clamp on the inlet of the vent elbow attached to the
inducer.
8. Rotate the vent elbow to the required position. There are rounded
notches on the vent elbow to align it with the inducer housing for
each orientation.
9. Tighten the clamp around the vent elbow. Torque the clamp to 15
lb-in. See Fig. 54 - Fig. 57.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Table 16.
14.
Fig. 15.
Use 45 deg. Elbows where
Avoid short horizontal offsets with 90
possible, to ensure conden-
deg. Elbows. Short offsets can be
sate drainage.
difficult to slope and may trap con-
densate.
Fig. 52 – Near Furnace Vent Connections
Fig. 53 – Inducer Vent Elbow
UPFLOW LEFT CONFIGURATION
UPFLOW RIGHT CONFIGURATION
41
Slope vent pipe back to the
furnace at least ¼" per foot
A14546
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