Vertical Through-The-Roof Applications - Vermont Castings STLDVPNSC Installation And Operating Instructions Manual

VENTING INSTALLATION
VERTICAL THROUGH-THE-ROOF
APPLICATIONS
A restrictor disc must be installed on
vertical terminations that are higher than
12' (366 cm).
Install restrictor disc as shown in Figure 34 for vertically
vented applications.
Up to two (2) restrictor discs may be needed for 40' instal-
lation.
The two (2) restrictor discs suppled will work for most instal-
lations. If a third disc is needed order Part No. 56D3027.
You may use a reducer to 4" x 6
4" x 7" in vertically vented applica-
tions. If a reducer is used, only one
restrictor may be used.
Figure 34 -
Install Restrictor Disc
into Fireplace Collar
This gas fi replace 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 35
NOTE: Horizontal sections of this vent system require a
minimum of 3" clearances to combustibles at the top of
the fl ue and 1" clearance at the sides and bottom until the
fl ue penetrates the outside wall. A minimum 1" clearance
all around the fl ue is acceptable at this point of penetration.
Unless the vertical run is 7
fi replace, the clearance for the horizontal run is 1" on all
sides.
Vertical sections of this vent system require a minimum of
1" clearance to combustibles on all sides of the pipe.
•
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"
(457 mm).
20306750
5 ⁄ " or
Restrictor
8
Disc
Fireplace
Collar
FP2839
1 ⁄ feet or higher form fl oor of
2
Designer Series Direct Vent Gas Fireplace
40' Maximum Height
8' Minimum Height
40' Maximum Height
8' Minimum Height
Figure 35 -
Support Straps for Horizontal Runs
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 8' (2.5 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 27
•
The maximum angular variation allowed in the system
is 270°. Figure 27
•
For the minimum height of the vent above the highest
point of penetration through the roof refer to Page 27,
Figure 40.
10'
Maximum
Support Straps
Every 3'
10'
Maximum
Support Straps
Every 3'
FP2308
25