Vermont Castings DVR28IN Operations Instructions download pdf (Page 16)

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Vermont Castings DVR28 Direct Vent Gas Fireplace

If installing a snorkel, a minimum 24” (610 mm) vertical

rise is necessary. The maximum horizontal run with the

24” vertical pipe is 36” (914 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. 17)

2. Remove soil to a depth of approximately 16”

(406 mm) below base of snorkel. Install window

well (not supplied). Reﬁll hole with 12” (305 mm) of

coarse gravel leaving a clearance of approximately

4” (102 mm) below snorkel. (Fig. 23)

3. Install vent system. Refer to Page 12.

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 pipe and secure to the

wall.

7. Level the soil to maintain a 4” (102 mm) clearance

below snorkel. (Fig. 23)







Zero Clearance Sleeve

(if required)

Screws

7TDVSNORK

(Snorkel)

4” Clear-

ance Min.

Window

Well

Gravel

Drain

Foundation Wall

*A minimum of 24” (610 mm)

vertical pipe must be installed

when using the 7TDVSNORK.

Firestop

7” Pipe

24” (610 mm )

Minimum *

BG404

Fig. 23 Below grade installation.

BG401

Snorkel

2/10/99 djt

Snorkel

Wall Screws

Sheet Metal

Screws

Foundation

Recess

Watertight Seal

Around Pipe

BG401

Fig. 24 Snorkel installation, recessed foundation.

Vertical Through-the-Roof Application

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. 25)

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



Max. Height 40’

(12.2 m)

Min. Height 8’

(2.4 m)

Max. 10’ (3 m)

Support Straps

Every 3’ (914 mm)

FP1757

Fig. 25 Support straps for horizontal runs.

• Up to two 45° elbows may be used within the hori-

zontal run. For each 45° elbow used on the horizon-

tal plane, the maximum horizontal length must be

reduced by 18” (450 mm).

Example: Maximum horizontal length:

No elbows = 10’ (3 m)

1 x 45° elbow = 8.5’ (2.6 m)

2 x 45° elbows = 7’ (2.1 m)

• A minimum of an 8’ (2.5m) vertical rise is required.

• Two sets of 45° elbow 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. 26)

• 7DVCS supports offsets. (Fig. 28) This application

will require that you ﬁrst determine the roof pitch

and use the appropriate starter kit. (Refer to Venting

Components List)

Never backﬁll around snorkel.

Always maintain a clearance of at least 4”

between the snorkel and the soil.

If the foundation is recessed, use recess brackets (not

supplied) for securing lower portion of the snorkel. Fas-

ten 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. 24)

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Vermont Castings DVR28IN Operations Instructions Page 16

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