Vertical Through-The-Roof Applications & Installation - Majestic 33BDVR Installation Instructions And Homeowner's Manual

BDVR Series Direct Vent Gas Fireplace
If the foundation is recessed, use recess brackets (not
supplied) for securing lower portion of the snorkel.
Fasten brackets to wall first, then secure to snorkel with
self drilling #8 x 1/2 sheet metal screws. It will be
necessary to extend vent pipes out as far as protruding
wall face. (Fig. 29)
Vertical Through-the-Roof Applications
This Gas Fireplace has been approved for:
1. Vertical installations up to 40' (12m) in height. Up to
10' (3m) horizontal vent run can be installed within
the vent system using a maximum of three 90°
elbows.
Minimum
8' (2.4m) /
Maximum
40' (12m) Vertical
Rise
Fig. 30 Support straps for horizontal runs.
2. Up to two 45° elbows may be used within the
horizontal run. For each 45° elbow used on the
horizontal level the maximum horizontal length must
be reduced by 18" (457mm).
Example: Maximum horizontal length
0 x 45° elbows = 10' (3m)
1 x 45° elbows = 8¹⁄₂' (2.6m)
2 x 45° elbows = 7' (2.1m)
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' (2.4m) of
vent pipe can be used between elbows. (Fig. 31)
5. 7DVCS must be used to support offsets. (Fig. 31)
This application will require that you first determine
the roof pitch and use the appropriate 7DVSKV (A,
B or F). (See Venting Components List, Page 20)
18
Maximum
10'
(3m)
Pipe Straps Every
3' (914mm)
CFM148
Max.
8
(2.4m)
45°
Max.
8'
(2.4m)
45°
Typical Offset Installation
Fig. 31 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 240mm).
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 240mm).
5. Place fireplace into position.
6. Place firestop(s) #7DVFS or Attic Insulation Shield
#7DVAIS into position and secure. (Fig. 32)
7. Install roof support (Fig. 33 & 34) and roof flashing
making sure upper flange is below the shingles.
(Fig. 33)
8. Install appropriate pipe sections until the venting is
above the flashing. (Fig. 33)
9. Install storm collar and seal around the pipe.
10. Add additional vent lengths for proper height. (Fig
35)
11. Apply high temperature sealant to 4" and 7" collars
of vertical vent termination and install.
Typical
Ceiling
40'
Support
(12m)
Application
Typical Roof
Support
Application
FP1021
10003357