19
hoRIZoNtAl VeNtING INStRuCtIoNS
To Join And Seal The FasNSeal Vent Pipe:
a) Insert male end into female section.
b) Push the units together as far as possible.
c) Firmly tighten locking band with a nut driver.
d) DO NOT penetrate the FasNSeal vent
pipe with fasteners.
e) Horizontal venting shall have a slope of
not less than ¼” (6.4mm) every 12 inches
(305mm) downward away from the boiler
to prevent the collection of condensate
throughout the assembly.
9.
Support Spacing:
Do not restrict thermal expansion movement
of the vent. The vent pipe must expand and
contract freely with temperature change.
Each run of vent piping shall be supported as
follows:
a) Z-Flex stainless steel vent piping requires a
loose fitting metal strap or similar support at
each joint at a maximum of 4 feet between
supports.
b) Heat-Fab stainless steel vent piping requires
a support for every 6 feet of horizontal piping
run. The support must be secured using at
least #10 fasteners to a solid material (solid
masonry or wood framing or blocking.) Do not
fasten to drywall sheathing using hollow wall
anchors. Each support will be 1
½
inch lower
than the previous support when spaced 6
feet apart.
c) Flex-L stainless steel vent piping requires a
loose fitting metal strap or similar support at
each joint at a maximum of 4 feet between
supports.
d) ProTech stainless steel vent piping requires
one loose fitting FasNSeal support strap
(#FSSH) for every 6’ of horizontal vent.
10. If the horizontal vent must go through a crawl
space or other unheated space, the cool
temperatures will likely cause the flue gases
to continuously condense inside the vent pipe.
Do not insulate the vent pipe. It must be visible
for monthly inspection. Insure that the vent
pipe is properly pitched away from the boiler,
with no low spots, so that condensate in the
vent will drain away from the boiler. An insulated
enclosure or chase, with access for inspection
and servicing of the vent, may be required to
prevent freezing of liquid condensate. Consult
the vent pipe manufacturer’s instructions for
specific guidelines.
11. At the beginning of each heating season and
monthly during the heating season, check all
vent pipes and the vent terminal to make sure
there are no obstructions. Periodically clean
the screen in the vent terminal.
Summary of Contents for XEB-2
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