Concentric Termination, Typical (Sidewall Or Vertical) - Weil-McLain Series 2 Manual

® S
ERIES
Concentric termination, typical
Figure 44 PVC 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.
40
2
-
G
AS FIRED WATER BOILER
— Boiler Manual
(sidewall or vertical)
LEGEND for Figure 44
1 — Inner PVC pipe (vent)
2 — Outer PVC pipe (air)
3 — Rain cap
Assembling concentric termination
1. Follow all instructions provided with the concentric
termination kit. The following are general guidelines
for information only
2. See Figure 44 for the typical assembly of a
concentric 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 44, or per the concentric
kit instructions.
DO NOT
screen until the assembly has been
inserted 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. Failure to properly assemble the
concentric termination can result in flue
gas recirculation, 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
termination if using a PVC concentric
vent kit. Install a locking collar at every
joints.
For AL29-4C vent pipe applications,
comply with any additional requirements
in the vent system manufacturer's
instructions. Provide a 3" PVC transition
at the boiler vent connection. Air pipe
must be PVC or CPVC. Provide a 3" PVC
transition at the boiler air connection
if using 2" air pipe. Provide transition
pieces to PVC at the vent and air pipe
termination connections.
4 — Bird screen
5 — Y fitting
6 — Finished assembly
install the rain cap and bird
Part number 550-142-190/1218