MHSC CDVR33N/PV7 Installation And Operating Instructions Manual page 24

CDV7 Series Gas Fireplace
9. Install storm collar and seal around the pipe.
10. Add additional vent lengths for proper height. Fig-
ure 38
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 an
Attic Insulation Shield must be installed. The enlarged
ends of the vent section always face downward.
Typical Roof
Support
application
Figure 36 -
FP1184
Venting Supports
Typical roof/ceiling
support apps.
4
Storm Collar
FP1184
Typical Ceiling
Support
application
Horizontal Overhang
2 ft.
Min.
Termination
Vent
Flashing
1" Minimum Clearance to
Combustibles
Concentric
Vent Pipe
Figure 37 -
Minimum Chimney Clearance
FP1971
Min chimney clearance
Figure 38 -
Roof Flashing
VenTInG InSTallaTIon
2 ft. Min.
Lowest
Discharge
Opening
12
H*
X
Roof pitch
Flat to 6/1
Over 6/1 to 7/1
Over 7/1 to 8/1
Over 8/1 to 9/1
Over 9/1 to 10/1
Over 10/1 to 11/1
Over 11/1 to 1/1
*H - Minimum height from roof to
lowest discharge opening of vent
3 #5 Sheet Metal
Screws per Joint
Sealant
Storm Collar
TWL101a
TWL101a
Twist Lock Pipe
2/8/99 djt
FP1971
h (feet)
1.0
1.5
1.5
.0
.5
3.5
4.0
69D3011