CDVSC7 & CDV7 Series Gas Fireplace
Venting installation
BELOW GRADE INSTALLATION
When it is not possible to meet the required vent terminal clearances of 12” (305 mm) above grade level, a snor- kel kit is recommended. It allows installation depth down to 7” (178 mm) below grade level. The 7” (178 mm) is measured from the center of the horizontal vent pipe as it penetrates through the wall.
Ensure the sidewall venting clearances are observed. If venting system is installed below ground, we rec- ommend a window well with adequate and proper drainage to be installed around the termination area.
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. Page 22, Figure 26
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 approximately 4” (102 mm) below snorkel. Figure 31
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 so as to maintain a 4” (102 mm) clearance below snorkel. Figure 31
| Screws | |
| 7TDVSNORK | |
| (Snorkel) | |
Firestop |
| |
7” Pipe | 4” (102 mm) | |
Clearance | ||
| ||
| Min. |
Do not back fill around snorkel.
A clearance of at least 4” must be maintained between the snorkel and the soil.
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 drill- ing #8 x 1/2 sheet metal screws. It will be necessary to extend vent pipes out as far as the protruding wall face. Figure 32
| Snorkel |
Foundation |
|
Recess | Wall Screws |
|
Watertight | Sheet Metal Screws |
Seal Around |
|
PIpe |
|
| BG401 |
Figure 32 -
Snorkel installation, recessed foundation
VERTICAL THROUGH-THE-ROOF APPLICA- TION
his 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. Figure 33
•Up to two 45° elbows may be used within the horizontal run. For each 45° elbow used on the horizontal 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) |
24” (610 mm) Minimum*
BG402a
Window
Well
Gravel
Drain
Foundation Wall
*A minimum of 24” (610 mm) verti- cal pipe must be installed when using the 7TDVSNORK Kit.
Figure 31 -
Below Grade Installation
2 x 45° elbows = 7’ (2.1 m)
•A minimum of an 8’ (2.5 m) 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. Figure 33
•7DVCS supports offsets. Figure 37. This application will require that you first determine the roof pitch and use the appropriate starter kit. (Refer to Venting Com- ponents List)
•The maximum angular variation allowed in the system is 270°. Figure 34
24 | 69D3011 |