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. 26 |
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. 17) for extended horizontal run if the vertical exceeds 24" (610mm).
1.Establish vent hole through the wall. See page 12
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. 25)
3.Install vent system. See page 12/13, 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. 25).
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. 26).
VERTICAL THROUGH THE
ROOF APPLICATIONS
MAXIMUM
10 FT
(3048mm)
MINIMUM
8FT./
MAXIMUM 40 FT.
VERTICAL
RISE
PIPE STRAPS
EVERY 3’ (914mm)
Fig. 27
ZERO CLEARANCE
SLEEVE IF REQUIRED
FIRESTOP
7" PIPE
24"/608mm
MINIMUM*
| 7DVSKS (SNORKEL) |
SCREWS | MINIMUM |
| 4" CLEARANCE |
| GROUND |
| WINDOW WELL |
| GRAVEL |
| DRAIN |
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. 25
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 90° elbows.
b)Up to two 45° elbows may be used within the horizontal run. For each 45° elbow used on the horizontal level the maximum horizontal length must be reduced by 18 inches (457mm).
Example: Maximum horizontal length
0 | - | 45° elbows | 10 ft. (3048mm) |
1 | - | 45° elbows | 8.5 ft. (2590mm) |
2 | - | 45° 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. 28) |
DO NOT BACK FILL AROUND SNORKEL. SOIL SHOULD NOT BE LESS THAN 4" (100mm) BELOW SNORKEL.
- 14 -
e) 7DVCS must be used to support offsets. (Fig. 29) |
This application will require that you first determine the roof |
pitch and use the appropriate 7DVSKV (A,B or F). (see |
Venting Components, page 16) |
