20306745
23
VWDV70 Series Gas Fireplace
4. Horizontal runs of
fl
exible vent shall be supported
at maximum 2 foot intervals; vertical runs,
fi
ve feet
intervals. Metal strapping, properly secured, is an
acceptable means to support the
fl
exible vent.
5. Flexible vent spacers are to be installed at inter-
vals prescribed by the
fl
exible vent manufacturer;
and in such a way as to maintain concentric inner
and outer vent spacing.
D. Attaching
fl
exible venting to vertical termination
assemblies.
1. When using Duravent pipe, an Vermont Castings
Group
fl
ex-to-pipe adapter (FPA) and/or rigid pipe
section(s) is required to connect the
fl
exible vent
assembly to the vertical termination by using
three self-penetrating screws.
2. Review
Figure 33
and corresponding instructions
for proper overlap, clamp and screw placement.
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 32
.
E. Installing
fl
exible venting to horizontal termination
assemblies.
FLEX VENT INSTALLATION
Figure 32 -
Typical Vertical Flex Vent Installation
Figure 33 -
Typical Pipe Connection
Gear Clamp
Screws
(3 Places
equidistant just
above gear
clamp)
UL1777
Flex Vent
1
3
⁄
4
" Flexible Pipe and
Collar Overlap
Vermont Castings
Group Horizontal
Vent Termination
Figure 34 -
Typical Horizontal Flex Vent Installation
FP1974
1. Connect the 5"
fl
exible vent to the horizontal
termination as in
Figure 34
.
2. Connect the 8"
fl
exible vent to the termination
ring as in
Figure 34
.
3. Review
Figure 34
for proper overlap and clamp
placement.
4. Three each self-penetrating screws are drilled
opposite one another and below the gear clamp.
5. Use only listed an approved terminations and
accessories, installed per the termination instruc-
tions and
Figure 34
.
Screws
(3 places
equidistant
just above
gear clamp)
Rigid Pipe Length
Flex to Pipe Adapter
Gear Clamp
1
3
⁄
4
" Flexible Pipe and
Adapter Outer Collar
Overlap
UL1777 Flex Vent
Gear Clamp
Termination
Cap
Roof Support
Flashing
Rigid Pipe
Length
Flex to Pipe
Adapter
Firestop
UL1777 Flex
PIpe
DVFF8A/8
Adapter
Storm Collar
