ASX7-5-Installation Instructions

Figure 6 - Vertical Vent Termination
VERTICAL TERMINATION
NOTICE: When using double wall vent pipe, O-ring
gaskets are not required and should be discarded.
When using single wall vent pipe, one O-ring should
be inserted in each of the ue pipe openings in the
Air Inlet Screen, Deector Disk and the top of the
Combustion Air Inlet Box Assembly.
Select location on roof for vent terminal, ensuring ade-
quate space inside the building/structure for combus-
tion air inlet box. Terminal must be at least 10 feet
(3.04m) from any wall or adjacent building or parapet
(See Table 1).
Cut a hole through the roof for 9 inch (229mm)
combustion air pipe. Combustion air inlet box is to be
suspended from the underside of the roof using suitable
brackets (eld supplied). Before mounting box, cut a
length of 9 inch pipe so that dimension A (see Figure 6)
is equal to the dimension from the top of the box to the
roof surface plus 2 feet (0.61m) or plus expected snow
depth, whichever is greater. Fasten 9 inch pipe to
combustion air inlet connection of combustion air inlet
box and seal joint. Insert pipe through roof and fasten
vent box in place. Flash and/or caulk 9 inch pipe to roof.
Install inlet air screen assembly and fasten to 9 inch
pipe with screws. Insert a 5 foot length (1.5m) of UL
1738 listed vent pipe through the 5-3/4 inch opening
with the “UP” arrow pointing up. Position the pipe to
extend 12 inches (305mm) beyond the inlet air screen.
Seal the space between the vent pipe and opening of
the combustion air inlet box using high temperature
silicone sealant. Install deector disk on UL 1738 listed
vent pipe 2-1/2 inches above inlet air screen and fasten
with screws. Seal joint between deector disk and pipe
with silicone sealant. Install vent terminal provided with
kit on top of UL 1738 listed vent pipe, fasten with screws
and seal joint (see Figure 6).
Connect ue pipe and combustion air pipe from
combustion air inlet box to unit following “Venting”
instructions on pages 7 and 8. Joint between UL 1738
listed vent pipe and single wall vent pipe must be sealed
with high temperature silicone sealant.
UL 1738 ue pipe should be installed so the arrows
indicating direction of airow on the vent pipe point
away from the unit.
Never use pipe other than 5 inch
diameter. Never use PVC, ABS or any other
nonmetallic pipe for venting! To do so may result in
serious damage to the unit and or severe personal
injury or death!
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