Vertical Or Horizontal Venting Using Secure Flex™ Venting Kits And Components - Lennox ENVY Installation Instructions Manual

LENNOX HEARTH PRODUCTS • SIGNATURE
Vertical or Horizontal Venting
Using Secure Flex™ Venting Kits
and Components
Secure Flex™ venting kits and components
may be used in any venting application
in place of rigid Secure Vent™ (SV4.5)
direct-vent components. All restrictions,
clearances and allowances that pertain to
the rigid piping apply to the flexible venting.
Secure Flex kits may not be modified.
Do not join separate sections of flex
pipe together.
Using an adaptor (SV4.5RF), Secure Flex
kits may be added to the end of a vent
run made up of rigid Secure Vent (SV4.5)
vent sections provided that doing so does
not violate any of the venting length,
height, routing, horizontal to vertical ratio
requirements or clearance considerations
detailed in this manual.
Secure Flex kits come with an adaptor that
can be fitted to the inclined channel end of
the last Secure Vent (SV4.5) vent section
in a rigid system in the exact same fashion
as any other Secure Vent section. Align
the dimpled end of the adaptor over the
previously installed section or appliance
f i r e - p a r t s . c o m
collar, adjusting the radial alignment until
the four locking dimples of the adaptor are
aligned with the inlets of the four inclined
channels of the last vent section or collar.
Push on the adaptor until it fully engages,
then twist the adaptor clockwise running
the dimples down and along the incline
channels until they seat at the end of the
channels.
Attach the flexible vent to the adaptor as
follows (Figure 25):
1. Install the Inner flex pipe—Install the
small gear clamp loosely around the
inner flexible vent pipe and push it back
out of the way. Apply a bead of Mill-
Pac Black (700 °F) high temperature
sealant (P/N 10K81) to the inner
adaptor collar, approximately 1/2 in.
from the end. Pull and extend the inner
flexible vent pipe. Slide the inner flex
pipe over the adaptor collar. Ensure the
flexible vent pipe completely engages
the adaptor collar to a distance of
1 3/4 in. from the end, and that it is
free from damage or tears. Slide the
gear clamp into place tighten it fully to
secure the flexible vent to the adaptor
inner collar approximately 3/4 in. from
the end of the flex. Install the three (3)
screws, 120° apart, through the flexible
vent pipe and into the adaptor collar
just below the gear clamp to provide
additional security to the connection.
22
SERIES DIRECT-VENT GAS FIREPLACES • ENVY/ENVY CD 35/40/45 • INSTALLATION INSTRUCTIONS
®
2. Install the outer flex pipe—Install the
large gear clamp loosely around the
outer flexible vent pipe and push it back
out of the way. Apply a bead of Mill-Pac
Black (700 °F) high temperature sealant
(P/N 10K81) to the outer adaptor
collar, to the grooves of the collar that
extend approximately 1 in. from the end
and to the flat surface, approximately
1 3/8 in. from the end. Pull and extend
the outer flexible vent pipe. Slide the
outer flex pipe over the adaptor collar.
Ensure the flexible vent pipe completely
engages the adaptor collar to a distance
of 1 3/8 in. from the end, and that it is
free from damage or tears. Slide the
gear into place and tighten it fully to
secure the flexible vent to the adaptor
outer collar approximately 3/4 in.
from the end of the flex. Install three
screws, 120° apart, through the flexible
vent pipe and into the adaptor collar
just below the gear clamp to provide
additional security to the connection.
Figure 25: Flexible Vent Adapter
Mil-Pac
black high
temperature
sealant
1 3/4 in.
(44 mm)
overlap
Adaptor
(SV4.5RF)
3. Route the flex vent—Ensure that the
flex vent is properly routed to provide
the required clearance. Do not allow the
flexible vent to bend in a radius tighter
than 5 in. (127 mm) (Figure 26). Evenly
space the internal flex vent spacers
(roughly every 6 in.) and avoid kinking
the inner pipe. Support the horizontal
sections of flex with metal straps at 2 ft
(0.61 m) intervals.
Figure 26: Flexible Vent
Flexible vent
section
DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
4. Install the firestop/spacers at the
ceilings and walls—When Secure Flex
penetrates a wall or ceiling, a firestop/
spacer is required. Use the SF4.5 VF
firestop/spacer for ceilings and the
SF4.5 HF firestop/spacer for walls. See
the appropriate sections and figures
shown throughout the venting section
for their installation requirements.
5. Attach the flex vent to the termination—
Secure Flex components can be
purchased separately and attached to
bulk lengths of Secure Flex flexible
tubing cut to size at the job site.
Secure the flexible vent to the Secure
Flex terminations in the same manner
(Figure 25) as it was attached to the
adaptor.
NOTE: Secure Flex vent must be attached
to Secure Flex terminations only. DO NOT
substitute Secure Vent terminations or
the Secure Vent adaptor for Secure Flex
components. The collars of Secure Flex
terminations and adaptors have a different
diameter than those used with the Secure
Vent pipe. Additionally, Secure Flex
Flex Vent
components have an extended length center
tube for use in attaching the flexible vent.
Securing screws
(3 Places)
Gear clamps
1 3/4 in.
(44 mm)
overlap
Securing screws
(3 Places)
5 in. (127 mm)
radius minimum