Approved Venting Materials; Vent Termination - UTICA BOILERS MAH-100 Manual

!
WARNING
Manufacturer recommends this condensing boiler be
vented with approved polypropylene venting material.
Use only materials listed below for vent pipe, intake
air pipe, and fittings. Failure to comply could result in
death or serious injury.
!
WARNING
• Covering non-metallic vent pipe and fittings with
thermal insulation shall be prohibited.
• Use of cellular core PVC for venting flue gas could
result in death, or serious injury.
• Coaxial venting shall be fastened with screws. Dual
flue venting is NOT fastened with screws.
!
WARNING
Do not use cellular core pipe. Only specified sized
pipes are to be used. When using venting material
other than boiler manufacturer's venting, note the
correct installation procedure. Failure to follow these
instructions could result in death, or serious injury.

5.4 Approved Venting Materials

Installation shall conform to requirements of authority having
jurisdiction or in absence of such requirements:
• USA - National Fuel Gas Code, ANSI Z223.1/NFPA 54.
!
WARNING
Pipe outdoor combustion air directly to boiler air
connection. Ensure combustion air does not contain
contaminants and is not drawn from an area likely
to have contaminants per Table 5-2. For example,
never pipe combustion air from areas near swimming
pools or laundry room exhaust vents. Contaminated
combustion air will damage boiler resulting in death or
serious injury.
Install an air filter which allows at least 800 cfm if the area
is subject to dirty or dusty intake air. Boiler performance at
maximum length may be impacted when an air filter is used.
If interior or exterior construction in vicinity of boiler is taking
place, take precautions to avoid exposing the boiler to fine
particulate dust. If boiler is exposed to any dust or dirt it
must be cleaned and serviced.
5 - COMBUSTION AIR AND VENT PIPING
1.
Venting shall be properly supported.
2.
Boiler shall not support any type of vent system.
3.
All piping, glue, solvents, cleaners, fittings and
components must conform to ASTM and ANSI standards.
In Canada ULC S636 and in the USA UL 1738 schedule 40
CPVC are the only approved vent system to be used as an
alternative to polypropylene venting for the exhaust pipe.
4.
Manufacturer requires use of a mechanical fastener at
every push-fit gasket connection when using a single wall
polypropylene vent system.

5.5 Vent Termination

• Terminate combustion air and vent pipes with fittings or
coaxial vent kit.
Use horizontal pipe for vent and 90° elbow for
combustion air termination when using fittings.
• Separate vent terminal from air inlet terminal to prevent
flue gas recirculation. If T-Terminal is used on flue pipe
at sidewall, air inlet terminal shall be at least 36" or more
away from vent terminal.
• Locate combustion air termination as far as possible from
swimming pool, swimming pool pump house, and other
sources of airborne chlorine.
• Locate combustion air and vent terminals as required by
authority having jurisdiction.
Approved Polypropylene Manufacturers
* Natalini
* DuraVent
®
* Centrotherm
* Z-Flex
®
Note: Maximum equivalent length may vary between
manufacturers.
19
240013354 REV B [09/15/2021]