Example: Maximum horizontal length
0 x 45° elbows | = | 10’ (3 m) |
1 x 45° elbows | = | 8¹⁄₂’ (2.6 m) |
2 x 45° elbows | = | 7’ (2.1 m) |
3.A minimum of an 8’ vertical rise.
4.Two sets of 45° elbows offsets within these vertical installations. From 0 to a maximum of 8’ (2.4 m) of vent pipe can be used between elbows. (Fig. 33)
5.7DVCS must be used to support offsets. (Fig. 33) This application will require that you first determine the roof pitch and use the appropriate 7DVSKV (A, B or F). (Refer to Venting Components List, Page 27)
Max.
8’
(2.4 m)
45° |
| Typical |
| 50’ | Ceiling |
| Support | |
Max. | (15 m) | |
| Application | |
8’ |
| |
(2.4 m) |
|
|
| 45° |
|
Typical Roof
Support Ap-
plication
Typical Offset Installation | FP1021 |
Fig. 33 Typical vertical roof applications.
Vertical Through-the-Roof Installation
1.Locate your fireplace.
2.Plumb to center of the (4”) flue collar from ceiling above and mark position.
3.Cut opening equal to 9³⁄₈” x 9³⁄₈” (240 x 240 mm).
4.Proceed to plumb for additional openings through the roof. In all cases, the opening must provide a minimum of 1 inch clearance to the vent pipe, i.e., the hole must be at least 9³⁄₈” x 9³⁄₈” (240 x 240 mm).
5.Place fireplace into position.
6.Place firestop(s) #7DVFS or Attic Insulation Shield #7DVAIS into position and secure. (Fig. 34)
CDV Series Direct Vent Gas Fireplace
Attic Insulation
Shield
Joist
Ceiling |
|
|
Installation |
| 11" |
| 11" | Upper Floor |
|
| |
|
| Joist |
|
| Firestop Spacer |
|
| Nails (4) |
|
| CFM100 |
Fig. 34 Place firestop spacer(s) and secure.
If there is room above ceiling level, firestop spacer must be installed on both the bottom and the top side of the ceiling joists. If an attic is above ceiling level a 7DVAIS (Attic Insulation Shield) must be installed. (Fig. 34)
7.Install roof support (Fig. 35 & 36) and roof flashing making sure upper flange is below the shingles. (Fig. 35)
8.Install appropriate pipe sections until the venting is above the flashing. (Fig. 35)
The enlarged ends of the vent section always face downward. (Fig. 35)
3 #5 Sheet Metal Screws per Joint
Sealant
Storm Collar
TWL101a
Fig. 35 Roof flashing.
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