Hampton
®
H27-10 Direct Vent Freestanding Gas Stove
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29
29
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installation
Termination
Cap
Top Adaptor
Existing
Metal
Chimney
System
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 alu-
minum 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 install-
ing 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.
Approved for US Installations Only
The use of an existing chimney as an air
intake is not covered under the ANSI Z21.88-
2014, CSA 2.33-2014 test methods and the
resulting ITS/WHI product certification. The
code Authority Having Jurisdiction must
be consulted prior to proceeding with this
installation method.
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" flex pipe to that
length (the flex should already be extended
to its nominal length).
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. (Diagram 3 and 4).
Diagram 1
Diagram 2
Diagram 3
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" diameter sleeve on the top side of
the Connector. 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. Diagram 5.
Diagram 4
Diagram 5
3) Connect the end of the flex pipe section to
the underside of the Top Adaptor using 3
sheet metal screws. Diagram 2.
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.
