Vermont Casting DVR33 manual Below Grade Installation, 7DVSKS

Vermont Castings, Majestic Products: DVR33

High Temperature	X
Sealant

CFM137

Fig. 27 Horizontal length requirement.

Step 7

Apply high temperature sealant to 4” (100 mm) and 7” (175 mm) collars or the termination one inch away from crimped end. Guide the vent terminations 4” and 7” collars into their respective vent pipes. Double check that the vent pipes overlap the collars by 2” (50 mm).

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

1.Establish vent hole through the wall (Fig. 24, page 16).

2.Remove soil to a depth of approximately 16”

(406 mm) below base of snorkel. Install drain pipe. Install window well (not supplied). Refill hole with 12” (305 mm) of coarse gravel leaving a clearance of approximately 4” (100 mm) below snorkel (Fig. 28).

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” clearance (100 mm) below snorkel (Fig. 28).

Secure the termination to the wall with screws provided and caulk around the wall plate to weatherproof.

As an alternative to screwing the termination directly to the wall, you may also use expanding plugs or an approved exterior construction adhesive. Or, you may attach the termination with screws through the inner body into the 4” vent pipe—however, for this method, you must extend the 4” pipe approximately 6”

(150 mm) beyond the outer face of the wall.

Support horizontal pipes every 3’ (91 cm) with metal pipe straps.

Below Grade Installation

When it is not possible to meet the required vent terminal clearances of 12” (305 mm) above grade level, a Snorkel

Zero Clearance Sleeve, if required

Firestop

7" pipe

24" (608 mm) min.*

	7DVSKS
	(Snorkel)
Screws	Min. clearance
	4" (102 mm)
	Ground

Window

well

Gravel

Drain

Foundation wall

*Minimum 24" (608 mm) vertical pipe must be installed when using 7DVSKS Kit.

CFM193

Vent Kit #7DVSKS is recommended. It allows installation depth down to 7” (178 mm) below grade level. The 7” (178 mm) is measured from the center of the horizontal vent pipe as it penetrates through the wall.

NOTE: Ensure that sidewall venting clearances are observed. If the venting system is installed below ground, we recommend a window well with adequate and proper drainage to be installed around the termination area.

Fig. 28 Below grade installation.

Do not backfill around snorkel.

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

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