W415-1283 / E / 12.21.16
23
HORIZONTAL AIR TERMINAL INSTALLATION
A.
Stretch the inner flex pipe to the required length taking into
account the additional length needed for the finished wall
surface. Apply a heavy bead of the Mill Pac sealant
(W573-0007) (not supplied) to the inner sleeve of
the air terminal. Slip the vent pipe a minimum of
2”
(50.8mm) over the inner sleeve of the air terminal and
secure with a minimum of 3 #8 screws.
B.
Using the outer flex pipe, slide over the outer
combustion air sleeve of the air terminal and secure with
a minimum of 3 #8 screws. Seal using red RTV silicone
(W573-0002) (not supplied).
C.
Insert the vent pipes through the firestop 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 fireplace,
couple them together as illustrated. The vent system must
be supported approximately every 3 feet (0.9m) for both
#10x2"
SCREWS
HI-TEMP
SEALANT
OUTER
EN
CAULKING
OUTER FLEX PIPE
2" (50.8mm) OVERLAP
HIGH TEMPERATURE
SEALANT
#8 X 1/2” SELF DRILLING
SCREWS
INNER COUPLER
OUTER COUPLER
OUTER
FLEX PIPE
vertical and horizontal runs. Use noncombustible strapping
to maintain the minimum clearance to combustibles.
FLEX PIPE
INNER
FLEX PIPE
The air terminal mounting plate may be recessed into the exterior wall or siding no greater than the depth
of its return flange.
23.1C
E.
The vent 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 firestop spacer, as shown below.
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