CFDV Series Gas Fireplace
20306739
27
VENTING INSTALLATION
VERTICAL THROUGH-THE-ROOF APPLICATION
For all vertical through-the-roof installations, the supplied
flue restrictors must be installed. Install the flue restrictor
according to the settings shown in the Vertical Through-the-
Roof Installation Flue Restrictor Chart in order to balance
the airflow in and out of the unit and to maintain proper
flame height.
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 51
•
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)
1 x 45° elbow = 8.5' (2.6 m)
2 x 45° elbows = 7' (2.1 m)
•
A minimum of an 8' (2.5 m) vertical rise is required.
•
Two sets of 45° elbow 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 52
•
SLP-HVS supports offsets.
Figure 54.
This application
will require that you first determine the roof pitch and
use the appropriate starter kit. (Refer to Venting Com-
ponents list)
•
The maximum angular variation allowed in the system
is 270°.
Figure 52
•
For the minimum height of the vent above the highest
point of penetration through the roof refer to
Figure 60.
Vertical Through-the-Roof Installation
Flue Restrictor Setting Chart
Vertical Run
Restrictor Setting
8-12 feet of pipe
Medium restriction
(2.4 – 3.7 m)
Figure 49
12-40 feet of pipe
Maximum restriction
(3.7 – 12 m)
Figure 50
Figure 49 –
Flue Restrictor Set at Medium Restriction
FP3042
restrictor 75
FP3042
Figure 50 –
Flue Restrictor Set at Maximum Restriction
FP3043
restrictor 100
FP3043
Max. Height 40' (12.2 m)
Min. Height 8' (2.4 m)
Max. 10' (3 m)
Support Straps
Every 3' (.9 m)
Max.
Height 40' (12.2 m)
Min.
Height 8' (2.4 m)
Max. 10' (3 m)
Figure 51 –
Support Straps for Horizontal Runs
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