Monessen Hearth DIRECT VENT MLDV500 - Manual (Page 27)

75D0004 7
MLDV Series Gas Fireplace FLEx VENT INSTALLATION
1. Always maintain the required clearance when routing the flex vent assembly.
. Install firestop spacers, Figure 38, when penetrating ceiling, attic spaces, or walls.
3. Do not allow the flexible vent to bend in radius tighter than 5" (17 mm). Figure 37
4. Horizontal runs of flexible vent shall be supported at maximum  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 manu-
facturer; 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.
. Review Figure 39 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
instructions and Figure 38.
E. Installing flexible venting to horizontal termination assemblies.
1. Connect the 5" flexible vent to the horizontal termination as in Figure 40.
. Connect the 8" flexible vent to the termination ring as in Figure 40.
3. Review Figure 40 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
instructions and Figure 40.
Termination
Cap
Storm Collar
Roof Support
Flashing
Rigid Pipe
Length
Flex to Pipe
Adapter
(FPA/8)
Firestop
UL1777 Flex
PIpe
DVF8A/8
Adapter
Figure 38 -
Typical Vertical Flex Vent Installation
FP1975
pipe connection
Screws
(3 Places
equidistant
just above
gear clamp)
Rigid Pipe Length
Flex to Pipe Adapter
(FPA/8)
Gear Clamp
1C\v" Flexible Pipe and Adapter
Outer Collar Overlap
UL1777 Flex Vent
Figure 39 -
Typical Pipe Connection
Gear
Clamp
FP1976
horizontal flex
Screws
(3 Places equidistant just
above gear clamp)
Gear Clamp
UL1777 Flex Vent
1C\v" Flexible Pipe and
Collar Overlap
MHSC Horizontal
Vent Termination
Figure 40 -
Typical Horizontal Flex Vent Installation
1DA 5" x 8" to 4"
x 6B\," Reducer
FP1974