Below Grade Installation
When it is not possible to meet the required vent ter- minal clearances of 12” (305 mm) above grade level a starter kit is recommended. It allows installation depth of down to 7” (178 mm) below grade level. The 7” (178mm) is measured from the center of the horizontal vent pipe as it penetrates through the wall.
If venting system is installed below ground, we recom- mend a window well with adequate and proper drain- age.
Ensure sidewall venting clearances are observed.
If installing a snorkel, a minimum 24” (610mm) vertical rise is necessary. The maximum horizontal run with the 24” (610mm) vertical pipe is 36” (914mm). The meas- urement is taken from the collar of the fireplace (or tran- sition elbow) to the face of the exterior wall. See Vent Chart (see ‘How to use the Vent Graph’) for extended horizontal runs if the vertical exceeds 24” (610mm).
1.Establish vent hole through the wall. (Fig. 23)
2.Remove soil to a depth of approximately 16” (406mm) below base of snorkel. Install drain pipe. Install window well (not supplied). Refill hole with 12” (305mm) of coarse gravel leaving a clearance of ap- proximately 4” (100mm) below snorkel. (Fig. 27)
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” (100mm) clear- ance below snorkel. (Fig. 27)
Zero Clearance |
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Sleeve if Required |
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Firestop |
| 7DVSKS |
7” Pipe | Screws | (Snorkel) |
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| Minimum 4” Clearance | |
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| Ground | |
| Window Well | |
24” (610mm) | Gravel | |
Drain | ||
Minimum | ||
| Foundation Wall | |
| • A minimum of 24” (610mm) vertical | |
| pipe must be installed when using | |
| the 7DVSKS/7TDVSKS kit. | |
| • The 22” vertical rise (center to cen- | |
| ter) of the snorkel may be included | |
FP1386 | for calculation of max. horizontal | |
| run. | |
Fig. 27 Below grade installation. | ||
10003848 |
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DVRTSB Bay Window Fireplace
Do not back fill around snorkel.
A clearance of at least 4” (100mm) must be maintained between the snorkel and the soil.
If the foundation |
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is recessed, use |
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recess brackets |
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(not supplied) for |
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| Snorkel | |
securing lower |
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portion of the | Foundation |
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snorkel. Fasten | Recess | Wall | ||
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brackets to wall | Water- |
| Screws | |
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first, then secure |
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tight Seal |
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to snorkel with self | Around |
| Sheet Metal | |
Pipe |
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drilling #8 x 1/2 |
| Screws | ||
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sheetmetal screws. |
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| CFM139 | |
It will be necessary | Fig. 28 | Snorkel installatin, recessed | ||
to extend vent | ||||
foundation. |
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pipes out as far as |
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protruding wall face. (Fig. 28) |
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Vertical Through-the-Roof Applications
This 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. (Fig. 29 & 30)
•Up to two (2) 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” (457 mm).
Example: Maximum horizontal length
0 | x | 45° elbows = | 10’ (3 m) |
1 | x | 45° elbows = | 8.5’ (2.6 m) |
2 | x | 45° elbows = | 7’ (2.1 m) |
•A minimum of an 8’ (2.4 m) vertical rise.
•A maximum of two (2) sets of 45° elbow offsets can be used within these vertical installation. From 0 to a maximum of 8’ of vent pipe can be used between elbows. (Fig. 30)
•7DVCS supports offsets. (Fig. 32) This application will require that you first determine the roof pitch and use the appropriate starter kit. (See Venting Components List)
•The maximum angular variation allowed in the system is 270˚. (Fig. 30)
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