Vermont Casting DVR28IN - Manual (Page 17)

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Vermont Castings DVR28 Direct Vent Gas Fireplace
1
2
3
4
1
2
3
4
1 + 2 + 3 + 4 = 270°
FP1179
Fig. 26 Maximum elbow usage.
• The maximum angular variation allowed in the sys-
tem is 270°. (Fig. 26)
• The minimum height of the vent above the highest
point of penetration through the roof is 2’ (610 mm).
(Fig. 29)
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 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 9³⁄₈” 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. 27)
7. Install roof support (Fig. 44) and roof flashing making
sure upper flange is below the shingles. (Fig. 28)
8. Install appropriate pipe sections until the venting is
above the flashing. (Fig. 30)
9. Install storm collar and seal around the pipe.
10. Add additional vent lengths for proper height. (Fig.
29)
11. Apply high temperature sealant to 4” and 7” collars
of vertical vent termination and install.
If there is a room above ceiling level, fire stop spacer
must be installed on both the bottom ad 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.
FP1029
attic insulation shield
firestop spacers
1/28/00 djt
Joist
Attic Insulation Shield
Ceiling Installation
Upper Floor
11”
(279mm)
Firestop
Spacer
Nails (4)
Fig. 27 Place firestop spacer(s) and secure.
FP1029
11”
(279mm)
FP1184
Typical roof/ceiling
support apps.
Typical Roof
Support
Application
Typical Ceiling Support
Application
Fig. 28 Venting supports.
FP1184
TWL101a
Twist Lock Pipe
2/8/99 djt
3 #5 Sheet Metal
Screws per Joint
Sealant
TWL101a
Fig. 30 Roof flashing.
Storm Collar
Min.
2' (610 mm)
FP1185
Fig. 29 Minimum termination to roof clearance.