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Install vent and combustion air piping
The boiler must be vented and supplied with combustion and ventilation air as described in this
section. Ensure the vent and air piping and the combustion air supply comply with these
instructions regarding vent system, air system, and combustion air quality. See also sections
"Determine vent location" at § 9.11.2 of this manual.
Inspect finished vent and air piping thoroughly to ensure all are airtight and comply with the
DANGER
instructions provided and with all requirements of applicable codes.
Failure to provide a properly installed vent and air system will cause severe personal injury or
death.
This appliance requires a special venting system. Use only approved stainless steel, PVC,
CPVC or polypropylene pipe and fittings listed for vent pipe, and fittings. Failure to comply could
result in severe personal injury, death, or substantial property damage.
DO NOT mix components from different systems. The vent system could fail, causing leakage
of flue products into the living space. Mixing of venting materials will void the warranty and
certification of the appliance.
For closet and alcove installations, CPVC, polypropylene or stainless-steel material MUST BE
WARNING
used in the closet/alcove structure. Failure to follow this warning could result in fire, personal
injury, or death.
Do not connect any other appliance to the vent pipe or multiple boilers to a common vent pipe.
Failure to comply could result in severe personal injury, death, or substantial property damage.
Improper installation of venting systems may result injury or death.
CAUTION
Installation must comply with local requirements and with the National Fuel Gas Code, ANSI
Z223.1/NFPA 54 for U.S. installations or CSA B149.1 for Canadian installations.
Follow the instructions in this manual when removing a boiler from an existing vent system.
NOTICE
The boiler vent and air piping can be installed through the roof or through a wall. Follow the procedures in this
manual for the method chosen. Refer to the information in this manual to determine acceptable vent and air piping
length.
You may use any of the vent/air piping methods covered in this manual. Do not attempt to install the boiler using
any other means.
You must also install air piping from outside to the boiler air intake adapter, unless following the "Room Air"
instructions on page 40 of this manual. The resultant installation is direct vent (sealed combustion).
Requirements for installation in Canada
1. Installations must be made with a vent pipe system certified to ULC-S636.
2. The first three (3) feet of plastic vent pipe from the appliance flue outlet must be readily accessible for visual
inspection.
3. The components of the certified vent system must not be interchanged with other vent systems or unlisted pipe/
fittings. For concentric vent installations, the inner vent tube must be certified vent material to comply with this
requirement.
When utilizing the single pipe method, provisions for combustion and ventilation air must be
in accordance with Air for Combustion and Ventilation, of the latest edition of the National
Fuel Gas Code, ANSI Z223.1/NFPA 54, in Canada, the latest edition of CGA Standard B149
Installation Code for Gas Burning Appliances and Equipment, or applicable provisions of the
local building codes.
The inlet for combustion air can never be located inside a room storing chemicals or
WARNING
contaminants as listed in section 9.6.1. Avoid installing the boiler in any area with possible
contaminants.
If contaminants are found, you MUST: - remove contaminants permanently.
42
or - relocate the boiler and air intake to an area free from
all possible contaminants.
E93.1601EN032.C VGH installation manual
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