BELOW GRADE INSTALLATIONS
When it is not possible to meet the required vent termi- nal clearances of 12 inches (305mm) above grade level a model #7DVSKS vent kit is recommended. It allows installation depth of down to 7 inches (178mm) below grade level. The 7 inches is measured from the centre
DO NOT BACK FILL AROUND SNORKEL. SOIL SHOULD NOT BE LESS THAN 4" BELOW SNORKEL.
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.
Ensure sidewall venting clearances are observed.
FOUNDATION
RECESS
WATERTIGHT
SEAL
AROUND
PIPE
SNORKEL
WALL
SCREWS
SHEET METAL |
|
SCREWS | Fig. 31 |
|
The maximum horizontal run with 24" vertical rise is 36" (915mm) 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".
1.Establish vent hole through the wall. See page 14
2.Remove soil to a depth of approximately 16" below base of snorkel. Install window well (not supplied). Refill hole with 12" of coarse gravel leaving a clear- ance of approximately 4" below snorkel. (Fig. 30)
3.Install vent system. See page 15, 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" clearance below snorkel (Fig. 30).
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. 31).
VERTICAL THROUGH THE
ROOF APPLICATIONS
MAXIMUM |
10 FT |
(3048mm) |
MINIMUM |
8 FT./ |
MAXIMUM |
40 FT. |
VERTICAL |
RISE |
PIPE STRAPS |
ZERO CLEARANCE
SLEEVE IF REQUIRED
FIRESTOP
7DVRT90
SCREWS |
7DVSKS 
(SNORKEL)
MINIMUM
4" CLEARANCE
GROUND
WINDOW WELL
GRAVEL
DRAIN
EVERY 3' |
(914mm) |
Fig. 32 |
This Gas Fireplace has been approved for,
a) Vertical installations up to 40 feet (12 metres) in height. |
Up to a 10 ft. horizontal vent run can be installed within |
the vent system using a maximum of three 90o elbows. |
7DVRT90
FOUNDATION WALL
*A minimum of 24"/608mm vertical pipe must be installed when using the 7DVSKS kit.
*The 22" vertical rise (center to
center) of the snorkel may be included for calculation of max. horizontal run.
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. |
Example: Maximum horizontal length |
| ||
0 | - | 45o elbows | 10 ft. |
1 | - | 45o elbows | 8.5 ft. |
Fig. 30
2 - 45o elbows | 7 ft. |
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