Converting Class-A Metal Chimney To Direct Vent System - Regency C34 Classic Owners & Installation Manual

installation
|
34
Support extensions - Round (RDSE)
or square (SQSE)
Steep pitched cathedral ceilings may require the
use of a support extension. This piece fits down
inside the support and can be adjusted to increase
the support's length by up to 22". The extension
is attached to the support using the eight metal
screws provided. Be sure there is at lease a 2-inch
overlap where the extension joins the support.
CONVERTING
CLASS-A METAL
CHIMNEY TO
DIRECT VENT SYSTEM
General
Approved for US Installations Only. The use of an
existing chimney as an air intake is not covered
under the CGA 2.17-M91, 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.
A) Through an existing Class A metal chimney go-
ing 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 flex pipe which is then
passed down through the center of the existing
Class A 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.
Prior to installation and connection of the vent
system to a Class A 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 Class A chimney.
For Class A chimneys, clean out doors and
caps or plugs for clean out 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.
34 |
Regency ® CLASSIC™ C34-11 Direct Vent Freestanding Gas Stove
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" (76 mm) 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).
3. Connect the end of the flex pipe section to
the underside of the Top Adaptor using 3
sheet metal screws. 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.
(Diagram 3 and 4).
5. Pull the flex pipe down through the ceiling
support box, until it protrudes approximately
3" (76 mm). 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 deco-
rative sleeve for double wall solid packed
pipe, with the sheet metal screws (supplied).
The holes in the Retro Connector are pre-
punched. Diagram 5.
Existing
Class
A Metal
Chimney
System
Diagram 1
7. The connection be-
tween the appliance
and the Retro Con-
nector may be com-
pleted with sections
of black direct vent
pipe, together with an
adjustable length.
Diagram 2
Important: The existing masonry flue open-
ing needs to have an area of at least a 36
sq. in. to insure proper intake/exhaust flow.
1. Before cutting any holes, assemble the
desired sections of black direct vent pipe
to determine the center of the masonry
penetration.
Diagram 4
Diagram 5
Diagram 3