Weil-McLain 550 MBH Nstallation And Operation Manual page 21

®
SlimFit Series 3
Venting/combustion air — general
Vent and air piping materials
1. See Figure 13, page 23 for approved vent and air piping materials, for both
connected. Adapter is available from Dura-Vent or Weil-McLain (see page 109 for part number).
Vent piping
1. Boiler flue gases must be piped from the boiler to outside, following the instructions in this manual, and compliant with all ap-
plicable codes. The vent pipe must terminate either through the sidewall or through the roof, located with the correct separation
from the air termination. See the associated instructions in the following pages.
2. Each SlimFit boiler requires a separate vent.
DIRECT EXHAUST OPTIONS
SIDEWALL
DIRECT VENT OPTIONS
SIDEWALL
Part number 550-100-168/0516
COMMERCIAL CONDENSING GAS
— Install Dura-Vent – FasNSeal™ adapter at each boiler fitting where stainless steel pipe will be
common vent.
VERTICAL
VERTICAL
-
FIRED WATER BOILER
— Do not connect different types of piping together.
Combustion air openings for direct
exhaust
1. Combustion air must be supplied through openings into the boiler
room, following the instructions in this manual, and compliant
with all applicable codes. Read the warning in Figure 12, page 22,
and ensure the air and boiler room will not contain contaminated
air.
2. Where the SlimFit boiler shares a space with other appliances, the
combustion 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, fol-
lowing the instructions in this manual, and compliant with all
applicable codes. Read the warning in Figure 12, page 22, 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 26, page 36. 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
and .
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