22
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Installation Instructions
901140-00, 01/2021
Innovative Hearth Products
DRT63ST-B Power-Vent Direct-Vent Fireplace
VERTICAL OR HORIZONTAL VENTING USING
SECURE FLEX
®
KITS AND COMPONENTS
When
Secure Flex
®
kits are used in a rear flue,
horizontal termination installation, at least 1 ft
of vertical rise is required.
Secure Flex
venting kits and components may
be used in any other vent installation where rigid
Secure Vent
®
(SV4.5) direct-vent components
can be used. All restrictions, clearances and
allowances pertaining to rigid vent also apply
to flexible vent. Do NOT modify
Secure Flex
kits.
Secure Flex
kits can be installed on the
end of a
Secure Vent
(SV4.5) rigid vent run,
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. When
combined, a rigid vent should not be installed
between two flexible vents.
Secure Flex
kits come with an included adaptor
that can be installed on the fireplace collar or
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 fireplace
collar, adjusting the radial alignment until the
four locking dimples of the adaptor are aligned
with the inlets of the four incline channels of the
last vent section or collar. Push on the adaptor
until it is fully engaged, then twist the adaptor
clockwise running the dimples down and along
the incline channels until they seat at the end
of the channels.
1.
Install the Inner Flex Pipe.
a.
Install the small gear clamp loosely around
the inner flexible vent, then push it back out
of the way.
b.
Apply a bead of Mill-Pac Black (700 °F)
high temperature sealant (P/N 10K81) to the
inner adaptor collar, approximately 1/2” from
the end.
c.
Pull and extend the inner flexible vent.
d.
Slide the inner flex vent over the adaptor
collar at least 1-3/4”.
NOTE
: Ensure the flex vent is free from
damage or tears.
e.
Slide the gear clamp down and tighten it
fully to secure the flexible vent to the adaptor
inner collar approximately 3/4” from the end
of the flex.
f.
Install three (3) sheet metal screws 120°
apart through the flexible vent and into the
adaptor collar just below the gear clamp to
provide additional security to the connection.
2.
Install the outer Flex Pipe.
a.
Install the large gear clamp loosely around
the outer flexible vent pipe, then push it back
out of the way.
b.
Apply a bead of Mill-Pac Black (700 °F)
high temperature sealant (P/N 10K81) to the
outer adaptor collar. Cover to the grooves of
the collar that extend approximately 1” from
the end and to the flat surface, approximately
1-3/8” from the end.
Apply ONLY MIL-PAC BLACK HIGH
TEMPERATURE SEALANT (P/N 10K81)
to the outside surface of both collars of
the adaptor (fill the grooves of the outer
collar to be covered by the flexible pipe)
and slide the flexible vent over the inner
and outer adaptor collars
NOTE
: Outer vent pipe is
pulled away to show inner
vent pipe details.
Adaptor (SV4.5RF)
Attach adaptor to vent collar or Secure Vent sections
1-3/4” (44 mm) flexible
vent and adaptor inner
collar overlap
Securing screws in three
(3) places through perfo-
ration and into the pipe
Gear clamps
Flexible vent
1-3/4” (44 mm) flexible
vent and adaptor outer
collar overlap
Securing screws in three
(3) places through perfo-
ration and into the pipe
Figure 25
Figure 26 - Flexible Vent
Flexible vent section
5” (127 mm)
radius minimum
Shown here: 36” Flex Connector Kit (H7748)
36” of flex with two adaptors for mating two
rigid sections of vent together.
c.
Pull and extend the outer flexible vent.
d.
Slide the outer flexible vent over the
adaptor collar. Ensure the flexible vent
completely engages the adaptor collar
1-3/4” from the end, and that it is free from
damage or tears.
e.
Slide the gear clamp down and tighten it
fully to secure the flexible vent to the adaptor
outer collar approximately 3/4” from the end
of the flexible vent.
f.
Install three (3) sheet metal screws 120°
apart through the flexible vent and into the
adaptor collar just below the gear clamp to
provide additional security to the connec-
tion.
3.
Route the flexible vent.
NOTE
: Ensure that the flexible vent is properly
routed to provide the required clearance. Do
NOT allow the flexible vent to bend in a radius
tighter than 5” (127 mm) (
Figure 26
)
.
Place the internal flexible vent spacers even-
ly and avoid kinking the inner vent. Support
horizontal sections of flexible vent with metal
straps at 2 ft (0.61 m) intervals.
4.
Install firestop/spacers at ceiling and wall
penetrations.
• SF4.5VF firestop/spacer for ceilings
• SF4.5HF firestop/spacer for walls
NOTE
: See the appropriate sections and fig-
ures shown throughout the venting section
for installation requirements.
5.
Attach the flexible vent to the termination.
NOTE
: Secure Flex
®
components can be
purchased separately and attached to bulk
lengths of Secure Flex flexible vent cut to size
at the job site. Attach the flexible vent to the
Secure Flex terminations as it was attached
to the adaptor
(
Figure 25
)
.
NOTE
: Attach Secure Flex vent to Secure Flex
terminations only. Do NOT substitute Secure
Vent terminations or Secure Vent adaptor
for Secure Flex components. Secure Flex
termination and adaptor collars are a differ-
ent circumference than Secure Vent collars.
Secure Flex vent has an longer center tube
to improve ease-of-installation.
