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22
75D2525
DVM Series Direct Vent Gas Fireplace
Install restrictor disc as shown in Figure 29 for vertically
vented applications.
Up to three (3) restrictor discs may be needed for 40'
installation.
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 6B\," or 4" x 7" in vertically
vented applications.
Restrictor
Disc
Fireplace Collar
FP2414
Figure 29 -
Install Restrictor Disc into Fireplace Collar
This Gas Fireplace has been approved for,
• Vertical installations up to 40' (12m) in height. Up to
a 10' (3m) horizontal vent run can be installed within
the vent system using a maximum of two 90° elbows.
Figure 30
• 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).
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 31
• Determine the roof pitch and use the appropriate starter
kit for offset installation.
10' Maximum
40'
Maximum
Height
8'
Minimum
Height
Support
Straps
Every 5'
Vertical
Support Straps Every 3'
10' Maximum
40'
Maximum
Height
8'
Minimum
Height
Support Straps Every 3'
FP1183
Figure 30 -
Support Straps for Horizontal Runs
• The maximum angular variation allowed in the system
is 270°. Figure 31
• The minimum height of the vent above the highest point
of penetration through the roof is 2' (610 mm).
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