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DVHVAC36
10001195
STEP 4
Measure the horizontal length requirement including a
2" (51 mm) overlap, i.e. from the elbow to the outside
wall finish plus 2", or the distance required if installing a
second 90° elbow. (Fig. 25)
STEP 5
Use appropriate length of pipe section - telescopic or
fixed - and install the horizontal vent sections. The 20"
(508 mm) section of pipe which goes through the wall is
packaged with the 7TDVSK starter kit, and can be cut
to suit if necessary. (Fig. 26)
Sealing vent pipe and firestop gaps with
high temperature sealant will restrict cold
air being drawn in around the fireplace.
CFM137
Rear Vent length
2/26/01 sta
X
High Temperature
Sealant
CFM137
Fig. 26 Apply high temperature sealant.
STEP 6
Apply high temperature sealant to 4" (102 mm) and 7"
(178 mm) collars or the termination 1" (25 mm) away
from the end. Guide the vent termination's 4" and 7" col-
lars into their respective vent pipes. Double check that
the vent pipes overlap the collars by 2" (51 mm). Secure
the termination to the wall with screws provided and
caulk around the wall plate to weatherproof. (Fig. 27)
CFM138
4", 7" collar
2/26/01 sta
X
X
CFM138
Fig. 27 Horizontal length requirement.
STEP 7
Support the horizontal pipes every 36" (914 mm) with
metal pipe straps. Make sure the horizontal vent pipe is
installed on a level horizontal plane.
STEP 8
Re-check the fireplace to make sure that it is levelled,
properly positioned and nailed or screwed to the floor.
If applied, the fireplace's adjustable frame drywall strips
(nailing flanges) should be fastened. Refer to "Framing
& Finishing" section.
Below Grade Installation
When it is not possible to meet the required vent ter-
minal clearances of 12" (305 mm) above grade level, a
snorkel termination, #7TDVSNORK is required. It allows
installation depth of down to 7" (178 mm) below grade
level. The 7" is measured from the center of the hori-
zontal vent pipe as it penetrates through the wall.
Ensure sidewall venting clearances are observed.
If venting system is installed below ground,
a window well with adequate and proper
drainage to be installed around the termi-
nation area is recommended.
The maximum horizontal run with 24" (610 mm)
vertical rise is 36" (914 mm) from the back of the
fireplace to the face of the exterior wall. Refer to the
vent graph on Page 12 for extended horizontal run if
the vertical rise exceeds 24" (610 mm).
CFM136
Rear Vent horizontal length
2/26/01 sta
X
CFM136
Fig. 25 Measure horizontal length including 2" overlap.
Always install
horizontal vent-
ing on a level
plane.