Majestic 33LDVT Installation Instructions And Homeowner's Manual page 20

LDVT Series Direct Vent Gas Fireplace
Vertical Through-the-Roof Installation
1. Locate your fireplace.
2. Plumb to center of the (4" (102 mm) 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" (25 mm) 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. 32)
Attic Insulation
Shield
Ceiling In-
11"
(279mm)
stallation
Fig. 32 Place firestop spacer(s) and secure.
7. Install roof support (Fig. 33) and roof flashing making
sure upper flange of flashing 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.
35)
20
Joist
Upper Floor
11"
(279mm)
Joist
Firestop Spacer
Nails (4)
CFM100a
CFM100a
Firestop-Vertical
Typical Roof Support
Application
Fig. 33 Roof and ceiling supports.
CFM110
Typical ceiling/roof support
10/90
Fig. 34 Roof flashing.
Fig. 35 Minimum termination to roof clearance.
If there is a 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.
The enlarged ends of the vent section always
face downward. (Fig. 34)
Typical Ceiling Sup-
port Application
CFM110
#8 Sheet Metal Screws
(3 per joint)
Sealant
Storm Collar
TWL101a
TWL101a
Twist Lock Pipe
2/8/99 djt
Min.
2' (610 mm)
CFM190
CFM190
TTR Ternim. 2'
1/25/02 sta
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