1 2
TNR-I&S-02
4. Partially assemble vent kit by performing the following:
a. Cement concentric Y fitting to larger diameter pipe. (See Figure
18).
b. Cement rain cap to smaller diameter pipe. (See Figure 19).
5. Install concentric Y fitting and pipe assembly through the structure’s
hole and field-supplied roof boot/flashing. Do not allow insulation or
other materials to accumulate inside pipe assembly when installing
through the hole.
6. Secure assembly to roof structure as shown in (Figure 20) using field-
supplied metal strapping or equivalent support material.
7. Install rain cap and small diameter pipe assembly in roof penetration
assembly. Ensure small diameter pipe is cemented and bottomed in
Y concentric fitting.
8. Cement heater combustion-air and vent pipes to concentric y fitting
assembly (Figure 18). (See Figure 20) for proper pipe attachment.
9. Operate heater through one cycle to ensure combustion-air and vent
pipes are properly connected to concentric vent termination
connections.
Horizontal Installation:
1. Become familiar with coaxial vent kit. As shown in Figures 17 through
19.
2. Determine the best location for the termination kit.
3. Cut the recommended 5" diameter hole.
4. Partially assemble vent kit.
a. Cement Y concentric fitting to larger diameter kit pipe. (See Figure
18).
b. Cement rain cap to smaller diameter kit pipe. (See Figure 19).
5. Install concentric Y fitting and pipe assembly through the structure’s
hole and field-supplied roof boot/flashing. Do not allow insulation or
other materials to accumulate inside pipe assembly when installing
through the hole.
6. Install rain cap and small diameter pipe assembly in concentric Y
fitting and large pipe assembly. Ensure small diameter pipe is cemented
and bottomed in concentric Y fitting.
7. Secure assembly to structure as shown in Figure 21. Ensure clearances
as shown in Figure 21.
8. Cement heater combustion-air and vent pipes to concentric Y fitting
termination assembly. (See Figure 21) for proper pipe attachment.
9. Operate heater through one cycle to ensure combustion-air and vent
pipes are properly connected to concentric vent termination
connections.
Figure 19
Rain Cap to Small Vent Pipe Ass’y
NOTICE
Ensure termination height is above the roof surface or anticipated
snow level. Figure 20. If assembly is too short to meet height
requirements, the 2 pipe supplied in the kit may be replaced by using
the same diameter pipe. DO NOT extend the overall dimension by
more than 60 in. (See Figure 17).
Figure 20
Concentric Vent Roof Top Attachment
NOTICE
Position termination where vent vapors will not damage plants/shrubs
or air conditioning equipment.
Position termination where vent vapors will not be adversely effected
by wind condition.
Position termination where it will not be damaged or be subjected to
foreign objects.
Position termination where vapors will not be objectionable.
