Direct Vent - Sidewall Concentric - Weil-McLain Aqua Balance WMB-155 Manual

W
TM
AquaBalance
11 DIRECT VENT — Sidewall concentric
Allowable vent/air pipe materials
& lengths
1. The concentric termination kit must be purchased
separately.
Use only the vent materials and kits listed in
Figure 22, page 19. Provide pipe adapters if
specified.
2. Locate the termination such that the total air pip-
ing and vent piping from the boiler to the termina-
tion will not exceed the maximum length given in
Figure 21, page 18.
3. This termination requires a 45-degree elbow that is
not supplied with the termination kit. The maximum
vent/air pipe lengths include allowance for this elbow.
For polypropylene applications, comply
with any additional requirements in the
vent system manufacturer's instructions.
(Do Not use 3" PVC transition pieces at the
boiler vent and air connections) and at the
termination if using a 3" PVC concentric
vent kit. Install a locking collar at every joint.
For AL29-4C vent pipe applications, comply
with any additional requirements in the vent
system manufacturer's instructions. Provide
a AL29-4C starter piece from the AL29-4C
manufacturer to the 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.
Wall penetration thickness between 2" to
24".
Determine termination location
1. The concentric termination kit must be installed as
shown in Figure 30, page 26.
2. The termination must comply with clearances and
limitations shown in Figure 23, page 21.
3. Locate the termination so it is not likely to be damaged
by foreign objects, such as stones or balls, or subject
to buildup of leaves or sediment.
Multiple vent/air terminations
1. When terminating multiple boilers, install each con-
centric termination as described in this manual.
All vent pipes and air inlets must terminate
at the same height to avoid possibility of
severe personal injury, death or substantial
property damage.
2. Place wall penetrations to obtain minimum clear-
ance as shown in Figure 29, page 26 for U. S. installa-
tions. For Canadian installations, provide clearances
required by CSA B149.1 or B149.2 Installation Code
and a ULC S636 compliant vent kit.
3. The air inlet of a boiler is part of a direct vent con-
nection. It is not classified as a forced air intake with
regard to spacing from adjacent boiler vents.
Part number 550-100-305/0118
M -
ALL OUNT GAS FIRED WATER BOILER
—
Boiler Manual
Figure 28
INSTALLATION SEQUENCE
Step 1 Read and follow all instructions in this manual. DO NOT proceed
with vent/air installation until you have read page 15
through page 20.
Step 2 Install the boiler in a location that allows proper routing of all vent
and air piping to the selected sidewall location.
Step 3 Make sure the selected sidewall termination location complies with
Figure 23, page 21. (Multiple boiler concentric terminations must
also comply with Figure 29, page 26.)
Step 4 Use only the vent materials listed in Figure 22, page 19. Provide pipe
adapters where required.
Step 5 Vent piping and air piping lengths must not exceed the values shown
in Figure 21, page 18.
Step 6 The concentric termination must be assembled and installed before
piping from the boiler to the termination.
Step 7 Prepare the sidewall penetration — assemble the concentric ter-
mination kit and secure the cover plates as instructed in this sec-
tion. Provide the supports indicated and mount the termination
assembly. See "Install termination — concentric pipes" on page 26.
Step 8 Install vent and air piping between the boiler and the concentric
vent/air termination. Slope horizontal piping downward toward the
boiler at least 1/4 inch per foot. See page 32 for general guidelines.
Step 9 Install pipe supports every 5 feet on both the horizontal and vertical
runs.
Step 10 Install a hanger support within 6 inches of any upturn in the piping.
See notices at left.
USE SWEEP ELBOWS FOR ALL VENT AND AIR
PIPING — DO NOT use short radius elbows for vent or
air piping. Boiler performance could be affected.
— Concentric horizontal
See notices at left.
See notices at left.
See notices at left.
25