Majestic Appliances 360DVS2 User Manual

22

1.  Locate your fireplace.
2.  Plumb to center of the (4”) flue collar from ceiling 

above and mark position.

3.  Cut an opening equal to 9³⁄₈” x 9³⁄₈” (240 x 240mm).
4.  Proceed to plumb for additional openings through 

the roof. In all cases, the opening must provide a 
minimum of 1” (25 mm) clearance to the vent pipe, 
i.e., the hole must be at least 9³⁄₈” x 9³⁄₈” (240 x 
240mm).

5.  Place fireplace into position.
6.  Place firestop(s) #7DVFS or Attic Insulation Shield 

#7DVAIS into position and secure. (Fig. 35)

7.  Install roof support (Fig. 33) and roof flashing making 

sure upper flange is below the shingles. (Fig. 34)

8.  Install appropriate pipe sections until the venting is 

above the flashing. (Fig. 34)

9.  Install storm collar and seal around the pipe.
10. Add additional vent lengths for proper height.  

(Fig. 32)

11.  Apply high temperature sealant to 4” and 7” collars 

of vertical vent termination and install.

CFM110

Typical ceiling/roof support

10/90

CFM110

Fig. 33  Chimney support.

TWL101a

Twist Lock Pipe

2/8/99   djt

Sheet Metal Screws (#5)

(3 per joint)

Sealant

Storm Collar

TWL101a

Fig. 34  Roof flashing.

CFM100_ 

Firestop_Vertical

032803     rjs

     11"

(279 mm)

11"

(279 mm)

Joist

Upper Floor

Joist

Firestop 

Spacer

Nails (4)

CFM100

Fig. 35  Firestop and attic insulation shield.