18
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Installation and Operation Instructions
900300-00, 01/2018
Innovative Hearth Products
DRT35ST and DRT35PF Direct-Vent Gas Fireplaces
C. Attach vent components to each other -
Other
vent sections may be added to the previously
installed section in accordance with the require-
ments of the vertical vent figures and tables.
To add another vent component to a length of
vent run, align the dimpled end over the inclined
channel end of the previously installed section,
adjusting the radial alignment until the four
locking dimples are aligned with the inlets of
the four incline channels of the previous section.
Push the vent component against the previous
section until it fully engages, then twist the
component clockwise running the dimples down
and along the incline channels until they seat at
the end of the channels.
This seating position
is indicated by the alignment of the arrow and
dimple as shown in
Figure 22.
D.
Install firestop/spacer at ceiling -
When
using Secure Vent, use SV4.5VF firestop/spacer
at ceiling joists; when using Secure Flex, use
SF4.5VF firestop/spacer. If there is living space
above the ceiling level, the firestop/spacer must
be installed on the bottom side of the ceiling.
If attic space is above the ceiling, the firestop/
spacer must be installed on the top side of
the joist. Route the vent sections through the
framed opening and secure the firestop/spacer
with 8d nails or other appropriate fasteners
at each corner.
Remember to maintain 1"
(26 mm) clearance to combustibles, fram-
ing members, and attic or ceiling insulation
when running vertical chimney sections.
Attic insulation shield (H3907) may be used
to obtain the required clearances indicated
here. See installation accessories tables on
Pages 39 and 40
.
Vertical (Offset) Installation
Analyze the vent routing and determine the
quantities of vent sections and number of el-
bows required. Refer to
Vertical Vent Figures
and Tables on
Page 15
to select the type of
vertical installation desired. Vent sections are
available in net lengths of 4-1/2" (114 mm),
10-1/2" (267 mm), 22-1/2" (572 mm), 34-1/2"
(876 mm) and 46-1/2" (1181 mm). Refer to the
Effective Vent Length Chart on
Page
17
for an
aid in selecting length combinations. Elbows are
available in 90° and 45° configurations. Refer
to
Figure 24
for the SV4.5E45 and SV4.5E90
elbow dimensional specifications.
Where required, a
telescopic vent section
(SV4.5LA)
may be used to provide the installer
with an option in installing in tight and confined
spaces or where the vent run made up of fixed
length pieces develops a joint in a undesirable
location, or will not build up to the required
length. The SV4.5LA Telescopic Vent Section
has an effective length of from 1-1/2" (38 mm)
to 7-1/2" (191 mm). The SV4.5LA is fitted with
a locking inclined channel end (identical to a
normal vent section component) and a plain end
with 3 pilot holes. Slip the plain end over the
locking channel end of a standard SV4.5 vent
component the required distance and secure
with three screws.
Maintain a minimum 1" (26 mm) clearance to
combustible materials for all vertical elements.
Clearances for all horizontal elements are 3"
(77 mm) on top, 1" (26 mm) on sides and 1"
(26 mm) on the bottom.
A.
Frame ceiling opening -
Use a plumb line
from the ceiling above the appliance to locate
center of the vertical run. Cut and/or frame an
opening, 10-1/2" x 10-1/2" (267mm x 267mm)
inside dimensions, about this center mark
(
Figure 20
)
.
To attach a vent component to the appliance
collar, align the dimpled end over the collar,
adjusting the radial alignment until the four
locking dimples are aligned with the inlet of
the four inclined channels on the collar
(refer to
Figure 21
)
. Push the vent component against
the collar until it fully engages, then twist the
component clockwise, running the dimples
down and along the incline channels until they
seat at the end of the channels. The unitized
design of the
Secure Vent
components will
engage and seal both the inner and outer pipe
without the need for sealant or screws. If desired
a #6 x 1/2" screw may be used at the joint, but
it is not required as the pipe will securely lock
when twisted.
NOTE:
An elbow may also be attached to the
appliance collar. Attach in the same manner as
you would a vent section.
B.
Attach vent components to appliance -
Secure Vent
®
SV4.5 direct vent system compo-
nents are unitized concentric pipe components
featuring positive twist lock connections (
see
Figures 21 and 22
).
All of the appliances covered in this document
are fitted with collars having locking inclined
channels. The dimpled end of the vent com-
ponents fit over the appliance collar to create
the positive twist lock connection.
Figure 20
10-1/2" Min.
(267 mm)
10-1/2" Min.
(267 mm)
First Vent
Component
Align the dimple (four places)
with the opening of the locking
incline channel on appliance
collar. Twist vent component
clockwise to engage and seal.
Locking
Incline Channel
Dimple
Appliance collar
Vent / Appliance Collar
Connection
Align the dimple (four places) of the
upper vent section with the opening of
the locking incline channel on the
lower vent section. Twist vent
component clockwise to engage and
seal until arrow and dimple align.
Locking
Incline Channel
Dimple
Arrow
Connected
Vent Sections
Vent / Vent Section
Connection
Arrow
Arrow
Figure 21
Figure 22
Figure 23
1” (26 mm)
Minimum
Clearance to
Combustibles
8 ft. (2.4 M)
Maximum
v
SV4.5VF
Firestop / spacer
u
SV4.5SP
Support Plate
u
SV4.5SU
Support Strap
Shown With
Optional
Radiant
Panels
u
Secured
to Vent with
Appropriate
Fasteners
Ceiling
Framing
v
When
using
secure
Flex, use
Firestop/
Spacer
SF4.5VF
SV4.5FA or
SV4.5FB Flashing
and SV4.5SC
Storm Collar
SV4.5CGV-1
Termination
