20306746
17
WDV See-thru Gas Fireplace
VERTICAL (THROUGH-THE-ROOF)
APPLICATIONS
This gas fireplace has been approved for,
•
Vertical installations up to 40' (12 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 20
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 2 = 45°
Elbow 3 = 45°
Elbow 4 = 90°
Total Angular Variation = 270°
12" Min.
1
2
3
4
1
2
3
4
FP1179
max bends
Figure 21 -
Maximum Elbow Usage
FP1179
FP1966
snorkel
Figure 19 -
Snorkel Installation, Recessed Foundation
Foundation
Recess
Watertight Seal
Around Pipe
Sheet Metal
Screws
Wall Screws
Snorkel
W
ARNING
•
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’ (2.6 m)
2x45° elbows = 7’ (2.1 m)
•
A minimum of an 12' (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' (2.5 m)
of vent pipe can be used between elbows.
Figure 21
•
The maximum angular variation allowed in the system
is 270°.
Figure 21
Max.
Height 40' (12.2m)
Min.
Height 8' (2.4 m)
Max. 10' (3m)
40' (12 m)
Maximum Height
12' (3.7 m)
Minimum Height
10' (3 m)
Maximum
Support Straps
Every 3' (914 mm)
12"
(305 mm)
Min.
FP1387
Figure 20 -
Support Straps for Horizontal Runs
VENT INSTALLATION