16
hoRIZoNtAl VeNtING INStRuCtIoNS
Termination of the vent shall be not less than
7 feet above an adjacent public walkway. The
vent terminal shall not be installed closer than
3 feet from the inside corner of an L shaped
structure. Termination of the vent should be
kept at least 3 feet away from vegetation. The
venting system shall terminate at least 4 feet
horizontally from, and in no case above or
below, unless a 4 foot horizontal distance is
maintained, from electric meters, gas meters,
regulators, and relief equipment.
e) The venting system shall terminate at least 4
feet below any eve, soffit, or roof overhang.
f) The venting system shall not terminate
underneath any deck, patio, or similar
structure.
g) Put vent on a wall away from the prevailing
winter wind. Locate or guard the vent to prevent
accidental contact with people or pets.
h) Terminate the vent above normal snowline.
Avoid locations where snow may drift and
block the vent. Ice or snow may cause the
boiler to shut down if the vent becomes ob-
structed.
i) Under certain conditions, flue gas will con
-
dense, forming moisture. In such cases, steps
should be taken to prevent building materials
at the vent terminal from being damaged by
exhaust of flue gas.
8.
Joining And Sealing The Vent Pipe:
The vent pipe needs to be both watertight and
gastight. Seal all joints and seams as follows:
A.
For Z-Flex Z-Vent Stainless Steel Vent Pipe
use a high temperature red silicone sealant rated
for 500°F. The outside of the male end and inside
of the female end of the pipe must be cleaned with
brake cleaner before applying silicone bead.
For 3” vent pipe runs begin with the male end
of the vent pipe over the boilers induced draft
blower outlet. For 4” vent pipe runs begin with
a 6” length of 3” Z-Vent (#02SVEPxx0306) over
the boiler’s induced draft blower outlet, to which
an even bead of high temperature silicone
sealant should be applied. Then connect
the 3” Z-Vent to a Z-Vent 3” to 4” reducer
(#02SVERxx0403). Then continue the 4” Z-Vent
pipe run by connecting the 4” male end of the
Z-Vent to the reducer. (A locking band may be
used around this joint for additional support.)
Then following the sealing instructions, push the
4” male end of the Z-Vent over the 4” increaser
fitting. When using the Tjernlund VH-1 vent
hood, the female end (flared end) of the vent
pipe will be connected to the termination hood.
The male end of the vent hood must be crimped
before pushing the Z-Vent over the vent hood’s
connecting pipe.
Before the pipes are joined, apply a ¼” bead of
silicone one inch from the end of the male end.
Then push the pipes together as far as they
will go making sure any seams are aligned and
oriented upward. Now apply another bead of
silicone around this joint and smooth out. Then
use a Z-Flex locking band around the center of
the joint.
Z-Flex Z-Vent Size
Locking Band Part #
3”
#02SVSLBX03
4”
#02SVSLBX04
1. Apply the high temperature silicone
approximately one inch from the end,
around the male end of the pipe in an even
¼” bead.
2. Pipes can now be pushed together as far
as they will go. The seams on pipe should
be aligned and oriented upward in all
horizontal appliances. Apply another bead
of silicone around this joint and smooth
out.3) Slide locking band over center of
joint and tighten gear clamps. Make sure
locking band is centered on joint.
4. Check all joints and seams for gas
tightness.
Summary of Contents for XEB-2
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