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16 U37-1 Regency
®
ULTIMATE Rear Vent Direct Vent Freestanding Gas Stove
CONVERTING CLASS-A
METAL CHIMNEY OR
MASONRY CHIMNEY TO
DIRECT VENT SYSTEM
General
There are two different types of direct vent
conversion 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 adaptor to an Underwriters
Laboratories (UL) listed 4 inch diameter
aluminum fl ex pipe which is then passed
down through the center of the existing metal
chimney system. Three sizes of Top Adap-
tors are available from Simpson Dura-Vent.
The Retro Connector (909B) is attached to
the bottom of the fl ex 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 (985K) 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 (909B). 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 qualifi ed service
person, such as a certifi ed chimney sweep
or home inspection service.
The direct vent system must not be con-
nected to a damaged factory-built or masonry
chimney.
For factory built, zero clearance, and ma-
sonry chimneys cleanout doors and caps
or plugs for cleanout tee fi ttings 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 qualifi ed service person to de-
termine if a negative pressure and/or leaky
chimney condition exists. Do not operate the
appliance until the problem is corrected.
Diagram 1
Diagram 2
Approved for US Installations Only
The use of an existing chimney as an air
intake is not covered under the ANSI Z21.88b-
2003/CSA 2.33b-2003 test methods and the
resulting ITS/WHI product certifi cation. 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" fl ex pipe to that
length (the fl ex should already be extended
to its nominal length).
3) Connect the end of the fl ex pipe section to
the underside of the Top Adaptor using 3
sheet metal screws.
Diagram 2.
Diagram 3
Diagram 4
Diagram 5
4) Pass the fl ex 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 (Part# 980 or 991)
onto the Adaptor. (Diagram 3 and 4).
5) Pull the fl ex pipe down through the ceiling
support box, until it protrudes approximately
3" (76mm). Connect the fl ex 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 fl ex 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.
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.
INSTALLATION