Combustion Air And Vent Piping; General - UTICA BOILERS MAH-100 Manual

!
WARNING
Fire, explosion, and asphyxiation hazard. Improper
installation could result in death or serious
injury. Read these instructions and understand all
requirements before beginning installation.
!
WARNING
ABS/PVC venting shall not to be used this product.
Use of DWV plumbing pipes to vent this boiler shall be
prohibited.
Use of cellular core PVC (ASTM F891), cellular core
CPVC, or Radel® (polyphenol sulfone) in venting
systems shall be prohibited.
Covering non-metallic vent pipe and fittings with
thermal insulation shall be prohibited.
Failure to follow these instructions could result in death
or serious injury.
Follow venting manufacturer's equivalent lengths
Note
for specialty fittings.

5.1 General

• Installations shall comply with Authority having jurisdiction
and in absence of such with:
» U.S. ANSI Z223.1 /NFPA 54 in the United States
• This boiler requires a dedicated direct vent system.
• Vent connections serving appliances vented by natural draft
shall not be connected into any portion of mechanical draft
systems operating under positive pressure.
• Use only manufacturer approved venting materials or
venting materials primer and glue approved to: ULC S636
in Canada, or UL 1738 in the U.S.
• Materials used in the U.S. shall comply with Authority
having jurisdiction and in absence of such with: ANSI/ASTM
D1785, ANSI/ASTM F441, ANSI/ASTM F493.Vent system
must have unrestricted movement through walls, ceilings
and roof penetrations.
• Check for proper joint construction when joining pipe to
fittings.
• If vent is penetrating ceilings and floors, openings must
have means of fire stopping in joist areas and proper fire-
stop spacer assemblies installed.
• Standard roof flashing methods must be used to install roof
flashing.
• Frame wall and roof openings to provide support for
attachment of termination assemblies.
• Support piping in accordance with pipe manufacturer's
instruction and authority having jurisdiction. In absence
of manufacturer's instruction use pipe hooks, pipe straps,
brackets, or hangers of adequate and strength located
at intervals of 3 ft. (1.m) or less. Allow for expansion/
contraction of pipe.

5 - COMBUSTION AIR AND VENT PIPING

• Venting shall be supported adjacent to each joint using
steel strapping or equivalent. See Figure 5-1.
• Support horizontal sections of vent pipe to prevent sags
capable of accumulating condensate.
• Assemble vent materials in accordance with venting
manufacturer's instructions.
• Slope exhaust pipe minimum of 1/4" per foot, or vent
manufacturer's recommendation, whichever is greater;
back toward the boiler.
• Any "in line" elbows in flue system must be taken into
consideration. First elbow on the top of the boiler is
included in equivalent length calculations.
• Use U.V. stabilized polypropylene when it will be exposed
to sunlight, wind, or prone to freeze ups.
• Check for proper joint construction when joining pipe to
fittings.
• Manufacturer requires use of an approved mechanical
fastener, which may vary per vent pipe manufacturer, at
every push-fit gasket connection when using a single wall
polypropylene vent system.
• Refer to specific vent manufacturer's manual for additional
support.
Figure 5-1 - Venting Support
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240013354 REV B [09/15/2021]