Weil-McLain WM97+100 Manual page 30

WM97+ Series 2
DIRECT VENT —
Use only the vent materials and kits
listed in Figure 21, page 24 . Provide
pipe adapters if specifi ed.
1. Locate the termination such that the total air
piping and vent piping from the boiler to the
termination will not exceed the maximum
length given in Figure 20, page 23 .
For polypropylene applications,
comply with any additional require-
ments in the vent system manufac-
turer'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 applica-
tions, comply with any additional
requirements in the vent system
manufacturer's instructions. Pro-
vide a 3" PVC transition piece at the
boiler vent connection. The air pip-
ing 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 in-
stalled as shown in Figure 28, page 30 and
Figure 30, page 31 .
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.
Do not exceed the maximum lengths
of the outside vent piping shown in
Figure 28 . Excessive length exposed
to the outside could cause freezing
of condensate in the vent pipe, re-
sulting in potential boiler shutdown.
In extremely cold climates, install
an insulated chase around the vent
piping, particularly if using longer
lengths. The chase must allow for
inspection of the vent pipe, and
insulation must be protected from
water.
1. When terminating multiple WM97+ boil-
ers, terminate each vent/air connection as
described in this manual.
– 30 –
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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 sidewall termination location complies with Fig-
ure 22, page 26 . (Multiple boiler sidewall plates must also comply with
Figure 29, page 31 .)
Use only the vent materials listed in Figure 21, page 24 . Provide pipe adapt-
ers where required. Vent piping and air piping lengths must not exceed the
values shown in Figure 20, page 23 .
Prepare the sidewall penetrations and secure the sidewall plates as instructed
in this section. See "Prepare wall penetrations" on page 31 .
The air piping must terminate in a
The vent piping must terminate in an
Install vent and air piping between the boiler and the sidewall openings.
Slope horizontal piping downward toward the boiler at least 1/4 inch per
foot. See page 39 for general guidelines.
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, or per
vent pipe manufacturer's instructions.
Attach the vent termination exterior piping: Use either of the confi gura-
tions shown above, as needed to ensure clearance above grade or snow line.
The vent and air pipes may run up as high as 4 feet with no enclosure.
The vent and air pipes must be secured with braces, and all clearances and
lengths must be maintained. Space braces no further than 24 inches apart.
External venting greater than 4 feet requires an insulated enclosure around
the vent and air pipes. The vent and air terminations must exit through
the enclosure as shown in the illustration above, maintaining all required
clearances.
— Boiler Manual
— Separate pipes sidewall
See notices at left.
See notices at left.
as shown above. See illustration above.
— DO NOT use short radius elbows for vent or air piping. Boiler
performance could be affected.
as shown above.
See notices at left.
See notices at left.
Part number 550-142-204/0117