Vermont Casting DVR33 manual Vertical Through-the-Roof Applications

Vermont Castings, Majestic Products: DVR33

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)

Foundation

Recess

Watertight

Seal Around

Pipe

Snorkel

Wall screws

Sheetmetal screws

CFM139

• 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

Fig. 29 Snorkel installation, recessed foundation.

Vertical Through-the-Roof Applications

This Gas Fireplace has been approved for,

point of penetration through the roof is 2’ (610 mm)

(Fig. 33).

•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).

Max. 40' (12 m)

Min. 7.5' (2.3 m)

*

45 degree elbows

*

*Maximum 8' (2.5m)

Max. 10' (3.1 m)

TTR max dim

Fig. 30 Support straps for horizontal runs.

18

TTR_max45

Fig. 31 Maximum elbow usage.

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