19
W415-0777 / 03.02.09
3.2.1 HORIZONTAL AIR TERMINAL INSTALLATION
!
WARNING
If using pipe clamps to connect vent components, 3 screws must also be used to ensure the
connection cannot slip off.
A.
Stretch the inner flex pipe to the required length taking
into account the additional length needed for the finished
wall surface. Slip the vent pipe a minimum of 2" over
the inner sleeve of the air terminal and secure with
3 #8 screws. Apply a heavy bead of the high
temperature sealant W573-0007 Mill Pac (not supplied).
B.
Using the outer flex 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 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
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 flange.
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 firestop spacer.
SCREWS
#10x2"
PIPE
2" OVERLAP
OUTER FLEX
INNER FLEX
PIPE
HIGH TEMPERATURE
SEALANT
HI-TEMP
SEALANT
#8 X 1/2” SELF DRILLING
SCREWS & WASHERS
INNER COUPLER
OUTER COUPLER
OUTER
FLEX PIPE
INNER
FLEX PIPE
OUTER FLEX
PIPE
CAULKING
23.5
VENT
HEAT
SHIELD
SCREWS
FIGURE 3.2.1a
FIGURE 3.2.1d
FIGURE 3.2.1e
