Sidewall Vent/Air Termination: Weil-Mclain Cap; Commonwealth Of Massachusetts - Weil-McLain Ultra 3 series User Manual

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gas fired water boiler
Sidewall vent/air termination:
Vent and air pipe termination
options
1. This section covers sidewall termination using the
Weil-McLain sidewall vent cap kit supplied with
each boiler.
a. Models 80, 105 and 155 are shipped with a
3-inch pipe size kit.
b. Models 230, 299 and 399 are shipped with a
4-inch pipe size kit.
c. The Weil-McLain sidewall vent/air cap kit in-
cludes the termination cap, inside and outside
wall plates, and mounting hardware to secure
the plates.
2. For other termination options and parts required,
see page 62.
Vent and air pipe requirements
1. Vent and air pipe diameters can be as specified in
Figure 13.
Figure 13
Vent and air pipe requirements
Boiler 2" 3" Plastic or
models Plastic 3" AL29-4C
80 & 105 Yes
155 No
230 No
299/399 No
Use appropriate adapters where needed — Ultra-80
through -155 require 3 5 inch outside diameter pipe at
the boiler vent and air connections Ultra-230, -299 and
-399 boilers require 4 5 inch outside diameter pipe at the
boiler vent and air connections
Vent and air pipe minimum length
1. Vent pipe and air pipe must each be at least 2 feet
long, with 2 elbows if sidewall venting or 1 elbow
if vertical venting.
Vent and air pipe maximum length
1. See Figure 15, page 19 for maximum length of
vent and air piping using the Weil-McLain sidewall
vent cap.
Other vent/air piping alternatives
— see information beginning on
page 62. Options include other
termination fittings and vertical
terminations.
18
— Boiler Manual
4" Plastic or
4" AL29-4C
Yes No
Yes No
Yes Yes
No Yes
Weil-McLain cap
Vent and air pipe installation sequence
Step 1
Install the boiler.
Step 2
Determine the termination method — sidewall or vertical,
concentric or separate pipes, etc.
Step 3
Determine proper location for wall or roof penetration for
each termination.
Step 4
Install termination assembly as described in this manual.
Step 5
Install air and vent piping from boiler to termination.
Step 6
Install pipe supports and brackets as required.
Figure 14
Vent and air termination options
Sidewall termination
(Weil-McLain sidewall termination cap)

Commonwealth of Massachusetts

When the boiler is installed within the Commonwealth of Massa-
chusetts:
• This product must be installed by a licensed plumber or gas fit-
ter.
• Sidewall vent air installations — see instructions on page 61.
Part number 550-100-090/0809