Owner`s manual
DV450S DIRECT VENT ROOM HEATER
01-01 Page 11 29863C
NOTE: For buildings with vinyl siding, a Vinyl Siding
Standoff should be installed between the vent cap and
the exterior wall. Attach the Vinyl Siding Standoff
to the Horizontal Vent Termination. The Vinyl Siding
Standoff prevents excessive heat from possible melt-
ing the vinyl siding material. NOTE: The HHW2 cap
incorporates it's own vinyl siding standoff. See Fig. 8.
2. Assembling Venting Sections. Use only vent supplied or
listed for use with this Heater. To attach a straight section to
the top of the Heater, female end down, slide the pipe over the
outer Collar on the Heater while the inner flue will slip over the
Vent Inner.
MAINTAIN MINIMUM CLEARANCES OR GREATER AROUND
THE VENT SYSTEM. Do not pack air spaces with insulation or
other material.
If the wall being penetrated is constructed of non-combustible
material (i.e.: masonry block or concrete) a 7 inch diameter
hole is acceptable. It is recommended that for masonry walls the
vent be wrapped with fiberglass insulation to prevent contact with
the masonry as the contact promotes premature deterioration of
the vent.
The Dura-Vent GS is unitized and twist-locks together. For the
twist-lock procedure, consult Figure 5 and do the following:
(1) Four indentations, located on the female ends of pipes and
fittings, are designed to slide straight onto the male ends of
adjacent pipes and fittings, by orienting the four pipe indentations
so they match and slide into the four entry slots on the male
ends. See Figure 5. Push the pipe sections completely together,
then twist-lock one section clockwise approximately one-quarter
turn, until the two sections are fully locked. The female locking
lugs will not be visible from the outside, on the Black Pipe or
fittings. They may be located by examining the inside of the
female ends.
(2) Horizontal runs of vent must be supported every three feet.
Wall Straps are available for this purpose.
Before connecting the horizontal run of vent pipe to the vent
termination, slide the black decorative wall thimble cover over the
vent pipe.
When using the adjustable section, maintain a 1” overlap on
pipe sections and secure. It is also important that the vent pipe
extends a minimum of 1 1/2” into vent cap.
3. Termination Cap. Position the horizontal vent termination so
that 1 1/2” clearance is maintained on top of the vent sections
and 1 1/2” on sides.
Before attaching the Vent Termination to the exterior wall, run a
bead of non-hardening mastic around the outside edges to make
a seal between the Cap and the wall.
Attach Cap to exterior wall with four (4) wood screws, making
sure that arrow on Cap is pointing up. After Cap is attached,
make sure that a 1 1/2” is maintained from top of vent to combus-
tibles.
Secure the connection between the vent pipe and the vent cap
by attaching the two sheet metal strips extending fromthe vent
cap assembly into the outer wall of the vent pipe. Use the two
sheet metal screws provided to connectthe strips to the pipe sec-
tion. Bend any remaining portion of the sheet metal strip back
towards the vent cap, so it will be concealed by the decorative
wall thimble cover. See Fig.6.
Slide the Decorative Wall Thimble up the wall surface and attach
with the screws provided. Apply Decorative Brass or Chrome
Trim if desired. See Fig. 7.
4. Vertical Rise on the Exterior. For installations requiring
a vertical rise on the exterior of a building, 14” and 36” tall
Snorkel Terminations are available. Follow the same installation
procedures that are used for the standard horizontal termination
found in Step 3.
Figure 5 - Twist-lock procedure
1. Preparing the Wall for Horizontal Termination. A hole
measuring 10” wide and 10” high must be cut and framed in the
exterior wall where venting will be terminated.
The height of the hole must be located to meet all local and
national codes and not be easily blocked or obstructed. The
minimum height to the center of the horizontal vent is 59
1
/2''
from the base of the unit. This figure will increase by the length
of each vertically positioned vent section added to the venting
system. See Figure 4.
Figure 4 - Exterior Wall Hole
EXTERIOR
WALL
HOLE TO BE
VENTED
THROUGH
10''x 10'' DURA-
VENT MINIMUM
54
1
/2''
59
1
/2''
Female
Locking
Lugs
Male
Locking
Lugs