Vermont Casting DVR33 - Manual (Page 18)

18
Vermont Castings, Majestic Products: DVR33
10004920
Watertight
Seal Around
Pipe
Foundation
Recess
Sheetmetal screws
Wall screws
Snorkel
CFM139
Fig. 29 Snorkel installation, recessed foundation.
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
(Fig. 30).
Vertical Through-the-Roof Applications
If the foundation is recessed, use recess brackets (not
supplied) for securing lower portion of the snorkel.
Fasten brackets to wall first, then secure to snorkel with
self drilling #8 x 1/2 sheet metal screws. It will be
necessary to extend vent pipes out as far as the
protruding wall face (Fig. 29).
• 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
°
elbows = 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
°
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
(Fig. 30).
• 7DVCS supports offsets (Fig. 32). This application
will require that you first determine the roof pitch
and use the appropriate starter kit. (See Venting
Components List).
• The maximum angular variation allowed in the
system is 270
°
(Fig. 31).
• The minimum height of the vent above the highest
point of penetration through the roof is 2’ (610 mm)
(Fig. 33).
Fig. 30 Support straps for horizontal runs.
Max. 10' (3.1 m)
Max. 40' (12 m)
Min. 7.5' (2.3 m)
TTR max dim
Fig. 31 Maximum elbow usage.
45 degree elbows
*
*
* Maximum
8' (2.5m)
TTR_max45