4.5 VERTICAL AIR TERMINAL INSTALLATION
A.
Fasten the roof support to the roof using the screws provided. The
roof support is optional. In this case the venting is to be adequately
supported using either an alternate method suitable to the authority
having jurisdiction or the optional roof support.
B.
Stretch the inner fl ex pipe to the required length. Slip the inner fl ex
pipe a minimum of 2” (51mm) over the inner pipe of the air terminal
connector and secure with a minimum of three #8 screws, when 4/7,
5/8 and 3/5 venting is used and a minimum of six #8 screws when
using 8/10 or 8/11 venting. Seal using a heavy bead of Mill Pac
sealant (W573-0007) (not supplied).
C.
Repeat using the outer fl ex pipe, using a heavy bead of red RTV
silicone (W573-0002) (not supplied) and a minimum of three #8
screws, when 4/7, 5/8 and 3/5 venting is used and a minimum of six
#8 screws when using 8/10 or 8/11 venting.
D.
Thread the air terminal connector / vent pipe assembly down
through the roof. The air terminal must be positioned vertically
and plumb. Attach the air terminal connector to the roof support,
ensuring that the top of the air terminal is 16” (406mm) above the
highest point that it penetrates the roof.
E.
Remove nails from the shingles, above and to the sides of the air
terminal connector. Place the fl ashing over the air terminal connector
leaving a min. 3/4” (19mm) of the air terminal connector showing
above the top of the fl ashing. Slide the fl ashing underneath the
sides and upper edge of the shingles. Ensure that the air terminal
connector is properly centered within the fl ashing, giving a 3/4”
(19mm) margin all around. Fasten to the roof. Do not nail through
the lower portion of the fl ashing. Make weather-tight by sealing
with caulking. Where possible, cover the sides and top edges of the
fl ashing with roofi ng material.
F.
Aligning the seams of the terminal and air terminal connector, place
the terminal over the air terminal connector making sure the vent
pipe goes into the hole in the terminal. Secure with a minimum
of three #8 screws, when 4/7, 5/8 and 3/5 venting is used and a
minimum of six #8 screws when using 8/10 or 8/11 venting.
G.
Apply a heavy bead of weatherproof caulking 2” (51mm) above the
fl ashing. Install the storm collar around the air terminal and slide
down to the caulking. Tighten to ensure that a weather-tight seal
between the air terminal and the collar is achieved.
H.
If more vent pipe needs to be used to reach the appliance see “HORIZONTAL AIR TERMINAL
INSTALLATION” section.
18.5
Roof Support
Inner Flex Pipe
Inner Pipe
Red RTV
Silicone
(W572-0002)
Air
Terminal
Connector
Outer Flex Pipe
Storm Collar
Flashing
Caulking
Weather
Sealant
2” (51mm)
Air Inlet
Base
!
WARNING
MAINTAIN A MINIMUM 2” (51mm) SPACE BETWEEN THE AIR INLET BASE AND THE STORM COLLAR.
W415-2207 / A / 08.28.17
21
EN
