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Part number 550-100-400/0119
66
Vent /air piping — options
Vent and air pipe termination options
1. Vent and air piping must terminate out the sidewall or through
the roof of the building, using only one of the methods described
in this manual.
2. Sidewall options (see Figure 12, page 18 , left side):
a. TOP: Weil-McLain termination cap (kit included with
boiler) — see page 67 for instructions.
b. MIDDLE: Concentric PVC pipe (requires special kit,
page 129 ).
c. BOTTOM: Separate air pipe and vent pipe.
3. Vertical options ( Figure 12, page 18 , right side):
a. TOP: Concentric PVC pipe (requires special kit, page 129 ).
b. BOTTOM: Separate air pipe and vent pipe.
Vent and air pipe diameters
1. Vent and air pipe diameters can be as specifi ed in Figure 12, page 18 .
Vent and air pipe minimum length
1. Vent pipe and air pipe must each be , with
2 elbows if sidewall venting or 1 elbow if vertical venting.
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 66
Sidewall
termination
Vertical
termination
®
Series 4
gas-fired water boiler — Boiler Manual
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