Vermont Castings MLDV500 Installation & Operating Instructions Manual page 26

MLDV Series Gas Fireplace
4" x 7" Flex Pipe
If you prefer to use 4" x 7" flex pipe, you must install model
7TDVP58 reducer (5" x 8" to 4" x 7") onto the fireplace
collar. Then follow the assembly guidelines for 5" x 8" flex
venting.
Flashing
Rigid Pipe
Length
Flex to Pipe
Adapter
(DVFFA/8)
Firestop
7TDVP58 5" x 8" to
4" x 7" Reducer
Figure 42 -
Typical Vertical Flex Vent Installation
6
Figure 41 -
Typical 4" x 7" Appliance Connection
Termination
Cap
Storm Collar
Roof Support
UL1777 Flex
PIpe
UL1777 Flex Vent
FP1974
UL1777
Flex Vent
1C\v" Flex-
ible Pipe and
Adapter Outer
5" x 8" to 4" x 7"
Adapter (7TDVP58)
FP1972
appliance connection
Screws
(3 Places
equidistant
just above
gear clamp)
Gear
Clamp
Figure 43 -
Typical Pipe Connection
Screws
(3 Places equidistant just
above gear clamp)
Gear Clamp
Figure 44 -
Typical Horizontal Flex Vent Installation
FP1976
horizontal flex
FLEx VENT INSTALLATION
Gear Clamp
Appliance
Starting Collar
FP197a
4" x 7"
Rigid Pipe Length
Flex to Pipe Adapter
(DVFFA/8)
Gear Clamp
1C\v" Flexible Pipe and Adapter
Outer Collar Overlap
UL1777 Flex Vent
FP1975
4 x 7 pipe connection
Vermont Castings
Group Horizontal
Vent Termination
1C\v" Flexible Pipe and
Collar Overlap
Screws
(3 places,
equidistant just
above gear
clamp)
75D0004