6
54D0700
BDV Series Gas Fireplace
FLEx VENt INStALLAtION
1. Flexible UL1777 listed venting may be used in any venting application where rigid direct vent
components can be used.
All restrictions, clearances and allowances that pertain to the
rigid piping apply to the flexible venting.
Flex kits may not be
modified. Flex kits may be added to the end of a vent run made
of rigid vent sections using pipe manufacturer's approved flex
to pipe adapters. This may occur only if doing so does not
violate any of the venting length, height, routing, horizon-
tal to vertical ratio requirements or clearance consider-
ations detailed in this manual.
2. The flex adapter starter kit (DVFA/8) is used to at-
tach flex venting to the appliance starting collar. It
includes 4" inner and 7" outer adapter rings.
Figure
34
• The inner and outer adapter rings are required to
start all flex runs.
• Never install damaged or torn flexible venting.
• Over tightening clamps may rip, tear, or otherwise
damage flexible venting.
• The adapter kit does not include individual pipe
sections which may be purchased separately.
(UL1777 listed type venting only.)
3. Start the flexible vent as follows:
A. Installing the inner flex adapter and pipe.
Figure
34
1. Insert the long side of the 4" inner ring into
exhaust pipe, gently tap to seat into place, and
secure with screws.
2. Slide the small gear clamp over the inner flex-
ible vent pipe, and push out of the way.
3. Pull and extend the inner flexible vent.
4. Slide the inner vent onto the adapter collar, for a minimum 1
3
/
4
" over-
lap.
5. Locate the clamp at approximately 3/4" from the flex end and tighten.
6. Secure the clamped inner section with three self-tapping screws,
drilled equidistant, just above the clamp perimeter.
B. Installing the outer flex pipe.
Figure 34
1. Firmly insert the outer adapter ring into the outer appliance starting
collar and secure with screws.
2. Slide the large gear clamp over the outer flexible vent pipe, and push
out of the way.
3. Pull and extend the outer flexible vent.
4. Slide the outer vent onto the appliance collar outer adapter for a minimum 1
3
/
4
" overlap.
5. Locate the clamp at approximately 3/4" from the flex end and tighten.
6. Secure the clamped outer section with three self-tapping screws, drilled equidistant, just
above the clamp perimeter.
FP1972
appliance connection
UL1777
Flex Vent
Securing
Screws (3
places, equi-
distant just
above gear
clamp)
1
3
/
4
" Flex-
ible Pipe
and Adapter
Outer
DVFA/8
Inner Adapter
Outer Adapter
Appliance
Starting
Collar
Figure 34 - Typical Appliance Connec-
tion
FP1973
flex pipe bend
UL1777
Flex Vent
5° Radius
FP1973
Figure 35 - Minimum Radius
for Flex Vent Section
NO
tE
Flex vent pipe spacers: Refer to manufacturer’s
specifications for correct positioning of the spacer springs to
maintain proper distance between inside and outside pipe.
