Example: Maximum horizontal length

0 x 45° elbows

=

10’ (3 m)

1 x 45° elbows

=

8¹⁄’ (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⁄” x 9³⁄” (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⁄” x 9³⁄” (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.

20010175

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Vermont Casting 36CDVRRN, 36CDVTRN installation instructions Vertical Through-the-Roof Installation