Vermont Casting DVRT36 manual Vertical Through-the-RoofApplication, Do not backfill around snorkel

Vermont Castings, Majestic Products DVRT36/39/43

If installing a snorkel, a minimum 24” (610mm) vertical rise is necessary. The maximum horizontal run with the 24” (610mm) vertical pipe is 36” (915mm). This mea- surement is taken from the collar of the fireplace (or transition elbow) to the face of the exterior wall. Refer to the Sidewall Venting Graph for extended horizontal run if the vertical exceeds 24” (610mm).

1.	Establish vent hole through the wall. (Page 17, Fig.
	27)
2.	Remove soil to a depth of approximately 16”
	(406mm) below base of snorkel. Install drain pipe.
	Install window well (not supplied). Refill hole with
	12” (305mm) of coarse gravel, leaving a clearance

Foundation

Recess

Watertight

Seal Around

Pipe

Snorkel

Wall screws

Sheetmetal screws

	of approximately 4” (102mm) below snorkel. (Fig.
	31)
3.	Install vent system.
4.	Ensure a watertight seal is made around the vent
	pipe coming through the wall.
5.	Apply high temperature sealant caulking (supplied)
	around the 4” and 7” snorkel collars.
6.	Slide the snorkel into the vent pipes and secure to
	the wall.
7.	Level the soil so as to maintain a 4” (102mm)
	clearance below snorkel. (Fig. 31)

Zero Clearance
Sleeve If Required
Firestop		7TDVSNORK
		(snorkel)
7" Pipe	Screws	Minimum
		4" Clearance
		Ground
		Window Well

	Gravel
24"/608mm
Minimum*	Drain

Foundation Wall

*A minimum of 24” (610mm) vertical pipe must be installed when using the 7TDVSNORK

CFM112

Fig. 31 Below grade installation.

Do not backfill around snorkel.

A clearance of at least 4” (102mm) must be maintained between the snorkel and the soil.

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. For a recessed foundation wall, it is necessary to extend vent pipes out as far as the protruding wall face. (Fig. 32)

CFM139

Fig. 32 Snorkel installation, recessed foundation.

Vertical Through-the-Roof Application

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. (Fig. 33)

Max. Height 40’ (12.2m)

Min. Height 8’ (2.4m)

Max. 10’ (3m)

Support Straps

every 3’ (914mm)

Max. 10’ (3m)

Max. Height 40’ (12.2m)

Min. Height 8’ (2.4m)

FP1183

Fig. 33 Support straps for horizontal runs.

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