QHT Boiler - Manual (Page 7)

Concentric Riser Vent Kit Installation
42”
3 3/4”
1/8”
39”
19 3
/4”
18”
3 3/4”
1/4”
1/4”
6”
3° Downward pitch
(2” per 39” length).
Away from boiler
Pipe connections (Figure 1):
Whenever joining concentric pipe cut the inner
exhaust pipe so it is 1 inch long than the outer
intake pipe.
Figure 1
Figure 2
Termination Location / Installation:
The concentric termination piece is installed
by sliding the outer intake pipe through the
wall from inside the building (shown in figure
2). The inner exhaust pipe is then slid into the
intake pipe until the termination cap bottoms
out on the end of the intake pipe.
Note: The termination should be pitched 3°
downward (2” down per 39” length) away from
the boiler. As shown in Figure 3.
Concentric Riser Kit components :
Figure 4 depicts the concentric riser kit
components and dimensions. The vertical
and horizontal sections can be cut to length
(from the male end) during installation.
Additional pipe or elbows can be purchased
separately. Refer to page 6 for the relevant
part numbers.
Figure 3
Figure 4
7
Exhaust Gasket Installation :
Install the red exhaust o-ring gaskets (A) into
each of the vent components female ends as
shown in Figure 5. Be sure to install the
gaskets so the beveled rings are oriented as
shown in Figure 5.
Figure 5