Vermont Casting DBR33, DBR39 Below Grade Installations, Vertical Through The Roof Applications

Models: DBR36 DBR33 DBR39

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BELOW GRADE INSTALLATIONS

BELOW GRADE INSTALLATIONS

When it is not possible to meet the required vent terminal clearances of 12 inches (305mm) above grade level a model #7DVSKS vent kit is required. It allows installation depth of down to 7 inches (178mm) below grade level. The 7 inches is measured from the centre of the horizontal vent pipe as it penetrates through the wall.

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

FOUNDATION

RECESS

WATERTIGHT

SEAL

AROUND

PIPE

SNORKEL

WALL

SCREWS

SHEET METAL

Fig. 32

SCREWS

Ensure sidewall venting clearances are observed.

The maximum horizontal run with 24" (610mm) vertical rise is 36" (914mm) from the back of the fireplace to the face of the exterior wall. See vent graph (Fig. 21) for extended horizontal run if the vertical exceeds 24" (610mm).

1.Establish vent hole through the wall. See page 14

2.Remove soil to a depth of approximately 16" (406mm) below base of snorkel. Install window well (not supplied). Refill hole with 12" (305mm) of coarse gravel leaving a clearance of approximately 4" (100mm)below snorkel. (Fig. 31)

3.Install vent system. See page 13, Steps 2 through 5.

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 inch 7DVSKS's snorkel collars.

6.Slide into vent pipe and secure to the wall.

7.Level the soil so as to maintain a 4" (100mm)clearance below snorkel (Fig. 31).

If the foundation is recessed, use recess brackets (not supplied) for securing lower portion of the snorkel. Fasten brackets to wall first and 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 protruding wall face (Fig. 32).

VERTICAL THROUGH THE

ROOF APPLICATIONS

MAXIMUM

10FT

(3048mm)

MINIMUM

8FT./

MAXIMUM

40 FT.

VERTICAL

RISE

PIPE STRAPS EVERY 3' (914mm)

Fig. 33

ZERO CLEARANCE

SLEEVE IF REQUIRED

FIRESTOP

7" PIPE

24"/608mm

MINIMUM*

 

7DVSKS

 

(SNORKEL)

SCREWS

MINIMUM

 

 

4" CLEARANCE

 

GROUND

 

WINDOW WELL

 

GRAVEL

 

DRAIN

VERTICAL THROUGH THE FOUNDATION WALL

*A minimum of 24"/608mm vertical pipe must be installed when using the 7DVSKS/7TDVSKS kit.

*The 22" vertical rise (center to center) of the snorkel may be included for calculation of max. horizontal run.

Fig. 31

This Gas Fireplace has been approved for,

a)Vertical installations up to 40 feet (12 metres) in height. Up to a 10 ft.(3048mm) horizontal vent run can be installed within the vent system using a maximum of three 90o elbows.

b)Up to two 45o elbows may be used within the horizontal run. For each 45o elbow used on the horizontal level the maximum horizontal length must be reduced by 18 inches (457mm).

Example: Maximum horizontal length

0

-

45o elbows

10 ft. (3048mm)

1

-

45o elbows

8.5 ft. (2590mm)

2 - 45o elbows 7 ft. (2133mm)

c) A minimum of an 8 ft. vertical rise.

d) Two sets of 45 degree elbow offsets within these

vertical installations. From 0 to a maximum of 8 ft.

(2438mm) a vent pipe can be used between elbows.

(Fig. 35)

e) 7DVCS must be used to support offsets. (Fig. 35)

DO NOT BACK FILL AROUND SNORKEL. SOIL SHOULD NOT BE LESS THAN 4" (100mm) BELOW SNORKEL.

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This application will require that you first determine the roof

pitch and use the appropriate 7DVSKV (A,B or F). (see

Venting Components, page 28)

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Vermont Casting DBR33, DBR39, DBR36 Below Grade Installations, Vertical Through The Roof Applications