78D0011
17
WDV Series Gas Fireplace
VentInG InstallatIOn
VertIcal (thrOuGh-the-rOOF)
applIcatIOns
This gas fireplace has been approved for,
•
Vertical installations up to 40' (1 m) in height. Up to
a 10' (3 m) horizontal vent run can be installed within
the vent system using a maximum of two 90° elbows.
Figure 21
nOte:
Horizontal and vertical sections of this vent system
require a minimum 1" clearance to combustibles at the top,
sides and bottom.
Example:
Elbow 1 = 90°
Elbow = 45°
Elbow 3 = 45°
Elbow 4 = 90°
Total Angular Variation = 70°
1" Min.
1
2
3
4
1
2
3
4
FP1179
max bends
Figure 22 -
Maximum Elbow Usage
FP1179
FP1966
snorkel
Figure 20 -
Snorkel Installation, Recessed Foundation
Foundation
Recess
Watertight Seal
Around Pipe
Sheet Metal
Screws
Wall Screws
Snorkel
W
arn
In
G
•
Do not back fill around snorkel.
•
a clearance of at least 4" must be
maintained between the snorkel and
the soil.
•
Up to two 45° elbows may be used within the horizontal
run. For each 45° elbow used on the horizontal plane,
the maximum horizontal length must be reduced by 18"
(450 mm).
Example:
Maximum horizontal length
No elbows = 10’ (3 m)
1x45° elbows = 8.5’ (.6 m)
x45° elbows = 7’ (.1 m)
•
A minimum of an 1' (3.6 m) vertical rise is required.
•
Two sets of 45° elbows offsets may be used within the
vertical sections. From 0 to a maximum of 8' (.5 m)
of vent pipe can be used between elbows.
Figure 22
•
The maximum angular variation allowed in the system
is 70°.
Figure 22
FP1183
max height
40' Maximum Height
1' Minimum Height
10'
Maximum
Support Straps
Every 3'
1" Min.
FP1183
Figure 21 -
Support Straps for Horizontal Runs
