Vertical Through-The-Roof; Applications & Installation - Vermont Castings WDVST500 Installation & Operating Instructions Manual

VenTInG InSTallaTIOn
Foundation
Recess
Watertight Seal
Around Pipe
Figure 19 -
Snorkel Installation, Recessed Foundation
FP1966
•
Do not back fill around snorkel.
snorkel
•
a clearance of at least 4" must be
maintained between the snorkel and
the soil.
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.
40' (12 m)
Maximum Height
12' (3.7 m)
Minimum Height
12"
(305 mm)
Min.
Figure 20 -
Support Straps for Horizontal Runs
78D2082
Max.
Height 40' (12.2m)
Snorkel
Wall Screws
Sheet Metal
Screws
10' (3 m)
Maximum
Support Straps
Every 3' (914 mm)
FP1387
Max. 10' (3m)
•
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
Example:
Total Angular Variation
1
2
3
4
12" Min.
Figure 21 -
Maximum Elbow Usage
WDV See-thru Gas Fireplace
Elbow 1 = 90°
Elbow 2 = 45°
Elbow 3 = 45°
Elbow 4 = 90°
= 270°
1
FP1179
2
3
4
17