Carrier Infinity ICS 58MVC 100 Series Installation Instructions Manual page 39

NOTE: Starting at furnace, slope vent pipe a minimum of
1/4-in. (6 ram) per linear ft. back toward furnace with no sags
between hangers.
VENT TERMINATION
General
Combustion-air (direct Vent / 2-pipe system only) and vent pipe
must terminate outside structure, either through sidewall or roof.
For vent termination clearance, refer to Fig. 34 for Direct Vent /
2- Pipe system and Fig. 35 for Ventilated Combustion Air
option.
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 Fig. 34
or Fig. 35 per application.
2. Termination or termination kit should be positioned where
vent vapors will not damage plants/shrubs or air condi-
tioning equipment.
3. Termination or termination kit should be positioned so that
it will not be affected by wind eddy, such as inside build-
ing 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. 36 or in Fig. 37 per application in outside
ambient by insulating pipe as indicated in Table 6.
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 calcula-
tions), find appropriate temperature for your application
and furnace model.
3. Determine required insulation thickness for exposed pipe
length(s).
NOTE: Pipe length (ft / M) specified for n_axinmm pipe lengths
located in unconditioned spaces cannot exceed total allowable
pipe length as specified in Table 6.
Vent Termination Kit (Direct Vent / 2-Pipe System Only)
NOTE: Always refer to the instructions in termination kit for the
latest version.
Combustion air and vent pipes MUST terminate outside structure.
A factory accessory termination kit must be installed as shown in
Table 8. There are four options of vent/combustion air
termination kits available as shown in Table 8.
NOTE: Combustion air pipe must have the same diameter as
vent pipe.
Concentric Vent / Combustion Air Termination Kit (Direct
Vent / 2-Pipe System Only
Determine an appropriate location for termination kit using the
guidelines provided in section "Vent Termination: General" in
this instruction.
1. Cut one 4-in. diameter hole for 2-in. kit, or one 5-in. dia-
meter hole for 3-in. kit.
2. Loosely assemble concentric vent/combustion air termina-
tion components together using instructions in kit.
3. Slide assembled kit with rain shield REMOVED through
hole.
NOTE: Do not allow insulation or other materials to accumulate
inside of pipe assembly when installing it through hole.
Roof terminations-Locate assembly through roof to
appropriate height as shown in Fig. 36 or Fig. 37.
Sidewall terminations-Locate assembly through sidewall
with rain shield positioned no more than 1-in (25 ram).
from wall as shown in Fig. 36 and Fig. 37.
4. Disassemble loose pipe fittings. Clean and cement using
same procedures as used for system piping.
5. Check required dimensions as shown.
Two-Pipe Termination Kit (Direct Vent / 2-Pipe System
Determine an appropriate location for termination kit using the
guidelines provided in section "Vent Termination: General" in
this instruction.
1. Cut 2 holes, 1 for each pipe, of appropriate size for pipe
size being used.
2. Loosely install elbow in bracket and place assembly on
combustion-air pipe.
Roof terminations-Loosely install pipe coupling on
properly cut vent pipe. Coupling nmst be positioned so
bracket will mount as shown in Fig. 38.
For applications using combustion-air pipe option, indic-
ated by dashed lines in Fig. 36, install 90 ° street elbow
into 90 ° elbow, making a U-fitting. A 180 ° U-fitting may
be used.
Sidewall terminations-Install bracket as shown in Fig.
36.
For applications using vent pipe option indicated by dashed lines
in Fig. 36, rotate vent elbow 90 ° from position shown in Fig. 36.
3. Disassemble loose pipe fittings. Clean and cement using
same procedures as used for system piping.
4. Check required dimensions as shown in Fig. 36.
(Direct Vent / 2-Pipe System ONLY)-When 2 or more 58MVC
furnaces are vented near each other, 2 vent terminations may be
installed as shown in Fig. 36, but next vent termination must be at
least 36 in. (914 ram) away from first 2 terminations. It is
important that vent terminations be made as shown in Fig. 36 to
avoid recirculation of flue gases.
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