Termination Configuration - 1 Pipe; Termination Configuration - 2 Pipe; Termination Configuration - 2 Pipe Basement - Johnson Controls TM9V C Series Installation Manual

5750149-UIM-D-1219
VENT SYSTEM
This furnace is certified to be installed with one of two possible vent
configurations.
1. Horizontal vent system. This vent system can be installed com-
pletely horizontal or combinations of horizontal, vertical, or offset
using elbows.
2. Vertical vent system. This vent system can be installed completely
vertical or a combination of horizontal, vertical, or offset using
elbows.
VENT APPLICATIONS AND TERMINATION
When selecting the location for a combustion air / vent termination, the
following should be considered:
1. Observe all clearances listed in vent clearances in these instruc-
tions.
2. Termination should be positioned where vent vapors will not dam-
age plants or shrubs or air conditioning equipment.
3. Termination should be located where it will not be affected by wind
gusts, light snow, airborne leaves or allow recirculation of flue
gases.
4. Termination should be located where it will not be damaged or
exposed to flying stones, balls, etc.
5. Termination should be positioned where vent vapors are not objec-
tionable.
6. Horizontal portions of the vent system must slope upwards and be
supported to prevent sagging.
7. Direct vent systems must be installed so the vent and the combus-
tion air pipes terminate in the same atmospheric zone. Refer to Fig-
ures 30 or 31.
FIGURE 29: Termination Configuration - 1 Pipe
WARNING
!
Condensation in Intake Pipe
Installations where the furnace and intake pipe are to be located in a
conditioned space and in a region that may have hot, humid weather
extending several consecutive days will have condensate form in the
intake pipe. Use of the supplied intake drain will ensure that any con-
densate will be safely diverted away from the internal components of
the furnace. Proper venting installation (of both intake and exhaust)
and sealing any equipment air leaks that might contact the intake pipe
will help reduce condensation.
26
FIGURE 30: Termination Configuration - 2 Pipe
FIGURE 31: Termination Configuration - 2 Pipe Basement
VENTING MULTIPLE UNITS
Multiple units can be installed in a space or structure as either a single
pipe configuration or a two-pipe configuration.
The combustion air side of the single pipe configuration shown in Figure
36 is referred to in these instructions as ambient combustion air supply.
Follow the instructions for ambient combustion air installations, paying
particular attention to the section on air source from inside the building.
The vent for a single pipe system must be installed as specified in the
venting section of these instructions with both vents terminating as
shown in Figure 29. Each furnace must have a separate vent pipe.
Under NO circumstances can the two vent pipes be tied together.
The combustion air side of the two-pipe configuration shown in Figure
35 can be installed so the combustion air pipe terminates as described
in outdoor combustion air or ventilated combustion air sections in these
instructions. Follow the instructions for outdoor combustion air or venti-
lated combustion air and the instructions for installing the vent system
with the vent terminating as shown in Figures 32 or 33. The two-pipe
system must have a separate combustion air pipe and a separate vent
pipe for each furnace. Under NO circumstances can the two combus-
tion air or vent pipes be tied together. The combustion air and vent
pipes must terminate in the same atmospheric zone.
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