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Hampton® H35-10 Direct Vent Freestanding Gas Stove
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installation
Termination
Cap
Top Adaptor
Existing
Metal
Chimney
System
4" Aluminum
Flex Pipe
Retro
Connector
Any Simpson
Dura-Vent
black direct vent
pipe plus an
adjustable length
to make a
proper connection.
CONVERTING
CLASS-A METAL
CHIMNEY OR
MASONRY CHIMNEY
TO DIRECT
VENT SYSTEM
There are two different types of direct vent conver-
sion systems listed below. Follow the appropriate
directions for your installation.
A) Through an existing factory built metal chimney
going through the ceiling: A typical conversion
of this type is shown in diagram 1. The concept
of direct vent conversion is to connect an adap-
tor to an Underwriters Laboratories (UL) listed
4 inch diameter aluminum flex pipe which is
then passed down through the center of the
existing metal chimney system. Three sizes
of Top Adaptors are available from Simpson
Dura-Vent. The Retro Connector is attached
to the bottom of the flex pipe. The Top Adaptor
and the Retro Connector are attached to the
existing chimney with sheet metal screws. The
appliance is then connected to the chimney
with appropriate black direct vent pipe and an
adjustable length section.
B) Through the wall of an existing masonry
chimney: A typical conversion of an existing
masonry chimney is shown in Diagram 6. A Top
Adaptor and Flashing are used at the top of the
masonry chimney. The 4 inch aluminum liner is
connected to the adaptor and is passed down
the chimney and out through the masonry wall
and attached to the Retro Connector . The Retro
Connector is attached to the masonry wall and
then connected to the direct vent pipe leading
to the appliance.
Prior to installation and connection of the vent
system to a factory-built or masonry chimney,
the chimney must be inspected and thoroughly
cleaned by a qualified service person, such as
a certified chimney sweep or home inspection
service.
The direct vent system must not be connected
to a damaged factory-built or masonry chimney.
For factory built, zero clearance, and masonry
chimneys cleanout doors and caps or plugs for
cleanout tee fittings and ash dumps shall be
secured in place and sealed before installing a
Direct Vent system within the chimney.
If the appliance shuts off during operation,
contact a qualified service person to determine
if a negative pressure and/or leaky chimney
condition exists. Do not operate the appliance
until the problem is corrected.
Converting a Factory Built Metal
Chimney
1)
Remove the existing chimney cap.
2)
Measure the distance from the top end of the
chimney to the bottom of the ceiling support
box, add 3" (76mm) to this measurement, and
cut a section of the 4" (102mm) flex pipe to that
length (the flex should already be extended to
its nominal length).
3)
Connect the end of the flex pipe section to the
underside of the Top Adaptor using 3 sheet
metal screws (refer to Diagram 2).
4)
Pass the flex pipe down through the center of
the chimney system, and center the adaptor
on the top of the chimney pipe. Drill four 1/8"
diameter holes through the adaptor and into
the chimney top. Insure that you are in fact,
drilling into the metal on the chimney. Twist-lock
the Termination Cap onto the Adaptor (refer to
Diagrams 3 and 4).
Diagram 1
Diagram 2
5)
Pull the flex pipe down through the ceiling
support box, until it protrudes approximately
3" (76mm). Connect the flex pipe to the Retro
Connector by slipping it into the 4-3/4" (121mm)
diameter sleeve on the top side of the Con-
nector. Use 3 sheet metal screws to assemble
these two parts.
6)
Push the flex pipe back up into the ceiling
support box, center the Retro Connector,
and attach it to the support box, or decorative
sleeve for double wall solid packed pipe, with
the sheet metal screws (supplied). The holes
in the Retro Connector are pre-punched (refer
to Diagram 5).
Diagram 4
Diagram 5
7)
The connection between the appliance and
the Retro Connector may be completed with
sections of black direct vent pipe, together
with an adjustable length.
Diagram 3
Approved for US Installations Only
The use of an existing chimney as an air intake
is not covered under the ANSI Z21.88a-10007,
CSA 2.33a-10007 test methods and the resulting
ITS/WHI product certification. The code Author
-
ity Having Jurisdiction must be consulted prior
to proceeding with this installation method.
