Using Flexible Vent Components; Horizontal Air Terminal Installation - Napoleon HD81NT Installation And Operating Instructions Manual

18
3.2

USING FLEXIBLE VENT COMPONENTS

Do not allow the inner flex pipe to bunch up on horizontal or vertical runs and elbows. Keep it pulled tight.
Spacers are attached to the inner flex pipe at predetermined intervals to maintain an even air gap to the outer
flex pipe. This gap is required for safe operation. A spacer is required at the start, middle and end of each elbow
ELBOW
FIGURE 3.2

3.2.1 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. Slip the vent pipe a
minimum of 2" over the inner sleeve of the air
terminal and secure with 6 #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 6 #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 fireplace,
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 1" 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.
W415-0687 / A / 02.20.09
to ensure this gap is maintained. These spacers must not be removed.
For safe and proper operation of the fi replace, follow the venting instructions
exactly.
All inner fl ex pipe and outer fl ex pipe joints may be sealed using high
temperature sealant W573-0002 (not supplied) or the high temperature
sealant W573-0007 Mill Pac (not supplied). However, the high temperature
SPACERS
sealant W573-0007 Mill Pac (not supplied) must be used on the joint
connecting the inner fl ex pipe and the exhaust fl ue collar.
Use only approved fl exible vent pipe kits marked:
"Wolf Steel Approved Venting" as identifi ed
by the stamp only on the outer fl ex pipe.
WARNING
!
#10x2"
SCREWS
HI-TEMP
SEALANT
OUTER
FLEX PIPE
22.1
FIGURE 3.2.1a
CAULKING
INNER FLEX
PIPE
OUTER FLEX
PIPE
2" OVERLAP
HI-TEMP
SEALANT
#8 X 1/2" SELF DRILLING
SCREWS & WASHERS
INNER COUPLER
OUTER COUPLER
OUTER FLEX
INNER
FLEX PIPE
FIGURE 3.2.1d
23.4
PIPE