Install Instructions
Concentric termination, typical (sidewall or vertical)
&IGURE 06# concentric termination assembly — DO NOT
attach the rain cap until the termination has been
inserted through the roof or wall and all supports
have been installed. See LEGEND at right. See kit
instructions for details of polypropylene kits.
!SSEMBLINGCONCENTRICTERMINATION
1. Follow all instructions provided with the concentric
termination kit. The following are general guide-
lines for information only
2. See Figure 38 for the typical assembly of a concen-
tric termination assembly.
3. Prepare the bird screen, item 4 (purchase separately
if not included with the kit). Cut the bird screen to
size if required. If the bird screen must be trimmed,
cut the bird screen to fit the outside diameter of the
PVC inner pipe supplied with the termination kit.
4. Partially assemble the vent termination kit in the
sequence shown in Figure 38, or per the concentric
kit instructions.
$/ ./4 install the rain cap and bird
screen until the assembly has been in-
serted through the roof (or sidewall)
and all supports have been installed.
Follow instructions to cover the end of
the assembly with plastic before inserting
through the roof penetration to prevent
debris from blocking the air passages.
If necessary, you can shorten the lengths
of the inner and outer pipes for a shorter
finished assembly. But you must ensure
the pipes butt correctly at both ends. Fail-
ure to properly assemble the concentric
termination can result in flue gas recir-
culation, causing possible severe personal
injury or death.
For polypropylene applications, comply
with any additional requirements in the
vent system manufacturer’s instructions.
Provide 3” PVC transitions at the boiler
vent and air connections and at the ter-
mination if using a PVC concentric vent
kit.
Install a locking collar at every joints.
For AL29-4C vent pipe applications, com-
ply with any additional requirements in
the vent system manufacturer’s instruc-
tions. Provide a 3” PVC transition at the
boiler vent connection. Air pipe must be
PVC or CPVC. Provide a 3” PVC transi-
tion at the boiler air connection if using
2” air pipe. Provide transition pieces to
PVC at the vent and air pipe termination
connections.
,%'%.$FOR&IGURE
1 Inner PVC pipe (vent)
2 Outer PVC pipe (air)
3 Rain cap
4 Bird screen
5 Y fitting
6 Finished assembly
Part number 550-142-122/0513
34
TM
GAS-FIRED WATER BOILER — Boiler Manual