Venting/Combustion Air - General - Weil-McLain SVF Series 1 Manual

SVF ™
Series 1
COMMERCIAL CONDENSING GAS
Venting/combustion air — general
There are two venting
methods available.
Follow the instructions
on the following pages
for the method used.
TM
SVF boilers must be vented and supplied
with combustion and ventilation air us-
ing piping and methods described in this
manual
.
DO NOT COMMON VENT Category IV
boilers.
Every boiler must have its own vent
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/NFPA 54 – 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 18,
page 24, and ensure the air and boiler room will not contain
contaminated air.
TM
2. Where the SVF 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.
Part number 550-100-200/1018
-
FIRED WATER BOILER
Method 1: Direct exhaust
• Combustion air taken from inside
(no air piping connected to air intake)
• Sidewall or vertical termination
Vent and air piping materials
A masonry chimney can ONLY be used as a
chase for vent and air piping
.
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 18, 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 28, page 36. Combustion/
ventilation openings may also be required in boiler room walls,
per instructions in this manual and applicable codes.
— Boiler Manual
Method 2: Direct vent
• Combustion air piped to boiler from
outside
• Sidewall or vertical termination
Use only the materials listed in this manual
(Figure 19, page 25) for vent and air pipe and fittings.
If used, a masonry chimney can ONLY be
used as a PIPE CHASE for vent and air
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
TM
the SVF boiler vent/air piping. NO OTHER appli-
ance 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.
Direct Exhaust and Direct Vent consisting of sidewall
air intake and through the roof exhaust must use the
combustion air damper kit. Failure to do so could
result in nuisance shut downs or substantial property
damage. See the Replacement Parts section for kit
part numbers, Figure 91, page 105.
23