Vermont Casting 36LDVT 39LDVT, 43LDVT manual Below Grade Installations, 7TDVSNORK

LDVT Series Direct Vent Gas Fireplace

Step 4

Install the 4” (102 mm) flex vent pipe to the appliance collar as described on Page 11. Secure the end with the first spring 6³⁄₄” (172 mm) from the flex pipe end to the unit.

Step 5

Slide the 7” (178 mm) flex vent pipe over the 4” flex vent pipe and secure the 7” collar as described on Page 11.

Step 6

Bend the flex pipe horizontal so the bottom of the horizontal pipe measure 6¹⁄₂” (165mm) from the top of the unit immediately after the 90° formation. (Fig. 25) Be sure to follow the 1” (25mm) rise in a 24” (610mm) horizontal run rule.

Step 7

Install the 4” flex then 7” flex to the termination.

1.Establish vent hole through the wall. (Fig. 18)

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 approxi- mately 4” (102 mm) below snorkel. (Fig. 26)

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 to maintain a 4” (102 mm) clearance below snorkel. (Fig. 26)

Do not back fill around snorkel. A clearance of at least 4” (102 mm) must be maintained between snorkel and the soil.

6���" (165mm)

FP1475

Fig. 25 Bend flex vent at 90° so horizontal portion is 6¹⁄₂” (165 mm) off top of unit.

Below Grade Installations

When it is not possible to meet the required vent ter- minal clearances of 12” (305mm) above grade level a snorkel vent kit is recommended. It allows installation depth of down to 7” (178mm) below grade level. The 7” is measured from the center of the horizontal vent pipe

Zero Clearance Sleeve (if required)

Firestop

7” Pipe

24” (610mm) Minimum*

Screws

7TDVSNORK

(Snorkel)

4” (102mm) Clearance Min.

Window

Well

Gravel

Drain

Foundation Wall

*A minimum of 24” (610mm) ver- tical pipe must be installed when using the 7TDVSNORK Kit.

*The 22” (559mm) vertical rise (center to center) of the snorkel may be included for calculationof max. horizontal run.

as it penetrates through the wall.

If venting system is installed below ground, we recommend a window well with adequate and proper drainage.

Ensure sidewall venting clearances are observed.

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” (914 mm). This measurement is taken from the collar of the fireplace (or transition elbow) to the face of the exterior wall. Refer to the Sidewall Vent Graph for extended horizontal run if the vertical rise exceeds 24” (610 mm).

BG402

Fig. 26 Below grade installation.

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 protruding wall face. (Fig. 27)

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