Weil-McLain WM97+100 Manual page 34

WM97+ Series 2
DIRECT VENT —
Use only the vent materials and kits listed
in Figure 21, page 24 . Provide pipe adapt-
ers if specifi ed.
1. Locate the terminations 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 20, page 23 .
For polypropylene applications, comply
with any additional requirements in the
vent system manufacturer's instructions.
Provide 3" PVC transition pieces at the
boiler vent and air connections. Install a
locking collar at every joint.
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 piece
at the boiler vent connection. The air
piping must be PVC or CPVC. Provide a
3" PVC transition piece at the boiler air
connection if using 2" air piping.
1. The air and vent terminations must be installed as
shown in Figure 34 .
2. The terminations must comply with clearances and
limitations shown in Figure 22, page 26 .
3. Locate the terminations so they are not likely to be
damaged by foreign objects, such as stones or balls,
or subject to buildup of leaves or sediment.
( Figure 35, page 35 )
1. When terminating multiple WM97+ boilers, ter-
minate each vent/air connection as described in
this section.
Terminate all vent pipes at the same
height and all air pipes at the same height
to avoid possibility of severe personal
injury, death or substantial property
damage.
2. Place roof penetrations to obtain minimum clear-
ance of 12 inches between edge of air intake elbow
and adjacent vent pipe of another boiler for U. S.
installations (see Figure 35, page 35 ). 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 WM97+ boiler is part of a direct
vent connection. It is not classifi ed as a forced air
intake with regard to spacing from adjacent boiler
vents.
– 34 –
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GAS FIRED WATER BOILER
Read and follow all instructions in this manual.
Install the boiler in a location that allows proper routing of all vent
and air piping to the selected sidewall location.
Make sure the selected vertical termination location complies with
Figure 22, page 26 . (Multiple boiler terminations must also comply
with Figure 35, page 35 .)
Use only the vent materials listed in Figure 21, page 24 . Provide pipe
adapters where required. Vent piping and air piping lengths must not
exceed the values shown in Figure 20, page 23 .
Prepare the vertical penetrations and secure penetration components
as instructed in this section. See "Prepare roof penetrations" on page 35
and "Termination and fi ttings" on page 35 .
The air piping must terminate in a 180-degree return bend or
Install vent and air piping between the boiler and the vertical termina-
tions. Slope horizontal piping downward toward the boiler at least 1/4
inch per foot. Install pipe supports every 5 feet on both the horizontal
and vertical runs. Install a hanger support within 6 inches of any upturn
in the piping. See page 39 for general guidelines. Also comply with vent
pipe manufacturer's instructions.
Insert the vent and air piping through the vertical penetrations and
secure the termination fi ttings.
Maintain clearances shown above. Vent and air terminations must be
fi tted with a bird screen as shown.
— Boiler Manual
Separate pipes vertical termination
IS AT LEAST 12 inches below vent outlet
IS NO FURTHER than 12 inches away center to center
IS AT LEAST 12 inches above roof or snow line
as shown above. The vent piping must terminate in a
as shown above.
— DO NOT use short radius elbows for vent or
air piping. Boiler performance could be affected.
See notices at left.
See notices at left.
Part number 550-142-204/0117