Venting/Combustion Air - Options; Vent And Air Piping Materials; Vent Piping - Weil-McLain Ultra Commercial Installation And Start-Up Manual

COMMERCIAL GAS
Venting/combustion air — options

Vent and air piping materials

1. See Figure 20 for approved vent and air piping ma-
terials, for both
different types of piping together.

Vent piping

1. Boiler flue gases must be piped from the boiler to
outside, following the instructions in this manual,
and compliant with all applicable codes. The vent
pipe must terminate either through the sidewall or
through the roof, located with the correct separa-
tion from the air termination. See the associated
instructions in the following pages.
2. Each Ultra boiler requires a separate vent.
common vent.
DIRECT EXHAUST OPTIONS
SIDEWALL
DIRECT VENT OPTIONS
SIDEWALL
Part number 550-100-086/0809
-
FIRED WATER BOILER
and .
— Do not connect
Combustion air openings for direct exhaust
1. Combustion air must be supplied through openings into the boiler
VERTICAL
room, following the instructions in this manual, and compliant with
all applicable codes. Read the warning in Figure 19, page 26, and ensure
the air and boiler room will not contain contaminated air.
2. Where the Ultra boiler shares a space with other appliances, the combus-
tion air openings must be sized to handle the combined requirements
of all appliances in the space.
SIDEWALL direct exhaust option
VERTICAL direct exhaust option
Combustion air piping for direct vent
1. Combustion air must be piped from outside to the boiler, following the
VERTICAL
instructions in this manual, and compliant with all applicable codes.
Read the warning in Figure 19, page 26, and ensure the air intake will
not be likely to draw in contaminated air.
2. Combustion air can be piped individually for each boiler, or it can be
manifolded as shown in Figure 31, page 37. Combustion/ventilation
openings may also be required in boiler room walls, per instructions
in this manual and applicable codes.
SIDEWALL direct vent option
VERTICAL direct vent option
— Boiler Manual
Use only the materials listed below, ensuring that all
materials meet local codes
PVC schedule 40 ANSI/ASTM D1785
PVC-DWV ANSI/ASTM D2665
CPVC schedule 40 ANSI/ASTM F441
ABS-DWV schedule 40 ANSI/ASTM D2661
PVC ANSI/ASTM D2564
CPVC ANSI/ASTM F493
ABS ANSI/ASTM D2235
Do not use cellular core pipe for either vent or air.
Plastic vent pipe must
be certified to UL S636
when required.
Air pipe can be any
of those listed at left
if acceptable for local
codes.
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