78D0011
21
WDV Series Gas Fireplace
Flex Vent InstallatIOn
Termination
Cap
Storm Collar
Roof Support
Flashing
Rigid Pipe
Length
Flex to Pipe
Adapter
Firestop
UL1777 Flex
PIpe
DVFF8A/8
Adapter
Figure 29 -
Typical Vertical Flex Vent Installation
FP1975
pipe connection
Screws
(3 Places
equidistant
just above
gear clamp)
Rigid Pipe Length
Flex to Pipe Adapter
Gear Clamp
1
C\v
" Flexible Pipe and Adapter
Outer Collar Overlap
UL1777 Flex Vent
Figure 30 -
Typical Pipe Connection
Gear Clamp
FP1976
horizontal flex
Screws
(3 Places equidistant just
above gear clamp)
Gear Clamp
UL1777 Flex Vent
1
C\v
" Flexible Pipe and
Collar Overlap
MHSC Horizontal
Vent Termination
Figure 31 -
Typical Horizontal Flex Vent Installation
FP1974
2. Install firestop spacers,
Figure 29
, when penetrating ceiling, attic spaces, or walls.
3. Do not allow the flexible vent to bend in radius tighter than 5°.
Figure 28
4. Horizontal runs of flexible vent shall be supported at maximum 2 foot intervals; vertical runs,
five feet intervals. Metal strapping, properly secured, is an acceptable means to support the
flexible vent.
5. Flexible vent spacers are to be installed at intervals prescribed by the flexible vent manufac-
turer; and in such a way as to maintain concentric inner and outer vent spacing.
D. Attaching flexible venting to vertical termination assemblies.
1. When using Simpson pipe, an MHSC flex-to-pipe adapter (FPA) and/or rigid pipe section(s) is
required to connect the flexible vent assembly to the vertical termination by using three self-
penetrating screws.
2. Review
Figure 30
and corresponding instructions for proper overlap, clamp and screw place-
ment.
3. Three each self-penetrating screws are drilled opposite one another and below the gear
clamp.
4. Use only listed and approved terminations and accessories, installed per the installation instruc-
tions and
Figure 29
.
E. Installing flexible venting to horizontal termination assemblies.
1. Connect the 5" flexible vent to the horizontal termination as in
Figure 31
.
2. Connect the 8" flexible vent to the termination ring as in
Figure 31
.
3. Review
Figure 31
for proper overlap and clamp placement.
4. Three each self-penetrating screws are drilled opposite one another and below the gear
lamp.
5. Use only listed an approved terminations and accessories, installed per the termination instruc-
tions and
Figure 31
.