18
20306743
KSTDV Series Gas Fireplace
W
ARNING
•
Do not back fi ll around snorkel.
•
A clearance of at least 4" must be
maintained between the snorkel and
the soil.
Install restrictor disc as shown in
Figure 20
for vertically
vented applications. Up to two (2) restrictor discs may be
needed for 40' installation. The two (2) restrictor discs
suppled will work for most installations. If a third disc is
needed order part number 56D3027.
VENTING INSTALLATION
VERTICAL THROUGH-THE-ROOF
APPLICATIONS
NOTICE
A restrictor disc must be installed on
vertical terminations that are higher than
12' (366 cm).
Restrictor Disc
Fireplace Collar
Figure 20 -
Install Restrictor Disc into Fireplace Collar
This gas
fi
replace has been approved for vertical installa-
tions up to 40' (12 m) in height. Up to a 20' (6 m) horizontal
vent run can be installed within the vent system using a
maximum of two 90° elbows.
Figure 21
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
1
⁄
2
feet or higher form
fl
oor of
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).
B
A
40' (12 m) Maximum Height
12' (3.7 m) Minimum Height
Support Straps
Every 3'
FP1387a
Figure 21 -
Allowable Horizontal Runs with Vertical Rises and
Terminations
10 12 14 16 18 20
5
6
7
8
9
10
11
A: Vertical
dimension from
the
fl
oor to the
center of the
horizontal vent
pipe.
B: Length of horizontal pipe section
before vertical elbow.
(Dimensions in feet)
Example:
If the vertical dimension from the
fl
oor of the
fi
replace is 8
1
⁄
2
' (2.6 m), the horizontal run to vertical elbow
must not exceed 16' (4.9 m).
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 22
•
The maximum angular variation allowed in the system
is 270°.
Figure 22
•
For the minimum height of the vent above the highest
point of penetration through the roof refer to Page 20,
Figure 26.
For models purchased after 4/16/15, please see addendum.
