Weil-McLain 2 Series Manual page 23

®
SlimFit Series 2
Venting/combustion air — general
There are two venting
methods available.
Follow the instructions
on the following pages
for the method used.
.
DO NOT COMMON VENT Category IV
boilers.
DO NOT common vent with any other appliance.
See page 26 for checking appliances remaining on
a common vent.
INSPECT VENT/AIR COMPONENTS
Inspect finished vent and air piping thoroughly to en-
sure all are airtight and comply with the instructions
provided and with all requirements of applicable
codes. Verify all air openings are correctly sized,
unobstructed, and free of airborne contaminants.
Failure to provide a properly-installed vent and air
system will cause severe personal injury or death.
DO NOT INSULATE NONMETALLIC VENT
PIPE
Do not cover nonmetallic vent pipe with thermal
insulation.
Code compliance
Venting/combustion air piping - Installations must
provide provisions for combustion and ventilation
air in accordance with the section "Air for Com-
bustion and Ventilation," of the National Fuel Gas
Code - ANSI Z223.1/NFPA54 – latest edition, or
Sections 8.2, 8.3, or 8.4 of Natural Gas and Propane
Installation Code - CAN/CSA B149.1, or applicable
provisions of the local building codes.
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. Combustion air must
not be exposed to any of the contaminants listed in Figure 21,
page 24, 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 com-
bined requirements of all appliances in the space.
Part number 550-100-180/0917
COMMERCIAL CONDENSING GAS
(no air piping connected to air intake)
- — Boiler Manual
FIRED WATER BOILER
- Vent and air piping materials
Use only the materials listed in this manual
(Figure 22, page 25) for vent and air pipe and fittings.
A masonry chimney can ONLY be used as a
chase for vent and air piping
.
pipes — The vent and air piping must be installed
as instructed in this manual and all joints must be
sealed. The chimney must be used only as a chase for
the SlimFit boiler vent/air piping. NO OTHER ap-
pliance or fireplace can be connected to the chimney.
The chimney must be straight, with no offsets, and
the vent and air piping materials must comply with
this instruction manual.
The chimney must be fitted with a sealed access
opening, through which the interior of the chimney
can be inspected.
The chimney and liner must be inspected at least
once annually to verify condition.
Failure to comply could result in severe personal
injury, death or substantial property damage.
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 21, page 24, and en-
sure 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 36. Combustion/
ventilation openings may also be required in boiler room walls,
per instructions in this manual and applicable codes.
outside
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