Majestic Appliances 360DVS3 - Manual (Page 22)

22
360 DVS Series Direct Vent Fireplaces
10006326
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 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
Typical Roof Sup-
port Application
Typical Ceiling Sup-
port Application
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.
If there is a room above ceiling level, a
firestop spacer must be installed on both
the bottom and the top sides of the ceiling
joists. (Fig. 35) If an attic is above ceiling
level, a 7DVAIS (Attic Insulation Shield)
must be installed.
NOTE: The enlarged ends of the vent sections are to
always face downward.
CFM100_
Firestop_Vertical
032803 rjs
11"
(279 mm)
11"
(279 mm)
Attic Insulation
Shield
Joist
Upper Floor
Joist
Firestop
Spacer
Nails (4)
Ceiling In-
stallation
CFM100
Fig. 35 Firestop and attic insulation shield.