20
W415-0780 / D / 08.13.12
4.4.1 HORIZONTAL AIR TERMINAL INSTALLATION
A.
Stretch the inner
fl
ex pipe to the required length
taking into account the additional length needed for
the
fi
nished wall surface. Apply a heavy bead of the
high temperature sealant W573-0007 Mill Pac (not
supplied) to the inner sleeve of the air terminal. Slip the
vent pipe a minimum of 2” over the inner sleeve of the
air terminal and secure with 3 #8 screws.
B.
Using the outer
fl
ex pipe, slide over the outer
combustion air sleeve of the air terminal and
secure with 3 #8 screws. Seal using high
temperature sealant W573-0002 (not supplied).
C.
Insert the vent pipes through the
fi
restop
maintaining the required clearance to
combustibles. Holding the air terminal (lettering
in an upright, readable position), secure to the
exterior wall and make weather tight by sealing
with caulking (not supplied).
D.
If more vent pipe needs to be used to reach
the appliance, couple them together as
illustrated. The vent system must be supported
approximately every 3 feet for both vertical and
horizontal runs. Use noncombustible strapping
to maintain the minimum clearance to combustibles.
The air terminal mounting plate may be recessed into the exterior
wall or siding no greater than the depth of its return fl ange.
E.
The vent heat shield must be installed only when terminating
horizontally. Remove the two screws nearest the vent collars on
the top of the appliance. Align the vent heat shield (supplied) and
secure. Adjust the vent heat shield to touch the
fi
restop spacer.
23.5A
HI-TEMP
SEALANT
#8 X 1/2” SELF DRILLING
SCREWS & WASHERS
INNER COUPLER
OUTER COUPLER
OUTER
FLEX PIPE
INNER
FLEX PIPE
OUTER
FLEX PIPE
SCREWS
#10x2"
PIPE
2" OVERLAP
OUTER FLEX
INNER FLEX
PIPE
HIGH TEMPERATURE
SEALANT
CAULKING
VENT
HEAT
SHIELD
SCREWS
