Carrier 58MTB - VENT TERMINATION ARRANGEMENTS; Sidewall and Roof Termination Guidelines

Vent/2-Pipe system and Table 9 for Non-direct Vent/1-Pipe
system. For exterior piping arrangements, refer to Fig. 44 for
Direct Vent/2-Pipe system and Fig. 45 for Non-Direct/1-Pipe
system.
Roof termination is preferred since it is less susceptible to damage
or contamination, and it has less visible vent vapors. Sidewall
termination require sealing or shielding of building surfaces with a
corrosive resistance material due to corrosive combustion products
of vent system.
NOTE: (Direct Vent/2-Pipe system ONLY). A factory accessory
termination kit MUST be used. See section ″Vent Termination Kit
(Direct Vent/2-Pipe System Only)″ in this instruction.
When determining appropriate location for termination, consider
the following guidelines:
1. Comply with all clearance requirements stated in Table 8 or
Table 9 per application.
2. Termination or termination kit should be positioned where
vent vapors will not damage plants/shrubs or air conditioning
equipment.
3. Termination or termination kit should be positioned so that it
will not be affected by wind eddy, such as inside building
corners, nor by recirculation of flue gases, airborne leaves, or
light snow.
4. Termination or termination kit should be positioned where it
will not be damaged by or subjected to foreign objects such as
stones, balls, etc.
5. Termination or termination kit should be positioned where
vent vapors are not objectionable.
Extended Exposed Sidewall Pipes
Sidewall combustion air pipe termination (direct vent/2-pipe
system only) and vent pipe termination may be extended beyond
area shown in Fig. 44 or in Fig. 45 per application in outside
ambient by insulating pipe as indicated in Table 10.
1. Determine combustion air pipe diameter (direct vent/2-pipe
system only) and vent pipe diameter, as stated above, using
total pipe length and number of elbows.
2. Using winter design temperature (used in load calculations),
find appropriate temperature for your application and furnace
model.
3. Determine required insulation thickness for exposed pipe
length(s).
NOTE: Pipe length(ft) specified for maximum pipe lengths lo-
cated in unconditioned spaces cannot exceed total allowable pipe
length as specified in Table 12.
Vent Termination Kit (Direct Vent/2-Pipe System Only)
NOTE: Always refer to the instructions in termination kit for the
latest version.
Fig. 43—Short Vent (5 to 8 ft) System
A96230
HORIZONTAL TO ROOF HORIZONTAL TO SIDEWALL
VERTICAL TO SIDEWALLVERTICAL TO ROOF
VENT PIPE
VENT PIPE
VENT PIPE
VENT PIPE
12″ MIN
12″ MIN
12″ MIN
12″ MIN
NOTE: A 12-In. minimum offset pipe section is recommended with
short (5-ft. to 8-ft) vent systems. This recommendation is to
reduce excessive condensate droplets from exiting the vent pipe.
COMBUSTION AIR
PIPE (NON-DIRECT
VENT/1-PIPE)
COMBUSTION AIR
PIPE (DIRECT VENT
/2-PIPE)
COMBUSTION AIR
PIPE (NON-DIRECT
VENT/1-PIPE)
COMBUSTION AIR
PIPE (DIRECT
VENT/2-PIPE)
COMBUSTION AIR
P
IPE (NON-DIRECT
VENT/1-PIPE)
COMBUSTION AIR
PIPE (DIRECT VENT
/2-PIPE)
COMBUSTION AIR
PIPE (NON-DIRECT
VENT/1-PIPE)
COMBUSTION AIR
PIPE (DIRECT VENT
/2-PIPE)
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