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1.1
INTRODUCTION
This model is designed to operate with all combustion
air being siphoned from the outside of the building and
all exhaust gases expelled to the outside of the build-
ing. This model is designed to be installed in a ma-
sonry fireplace or factory built fireplace. These units
CANNOT be recessed inside combustible construction.
Minimum dimensions of the masonry or factory-built
fireplace into which these models can be installed, are
32 1/8-inches (816mm) width x 13 1/2 -inches (343mm)
depth x 20 1/2 inches (521mm) height.
WARNING: THIS UNIT IS NOT FOR USE WITH SOLID
FUEL.
These units MUST use the flue termination described
in the flueing section of the manual.
The control system for these model are a millivolt type.
It consists of a gas control valve/variable regulator, a
standing pilot/thermopile/thermocouple, a piezo ignitor,
and an ON/OFF switch. The controls are located be-
hind the lower grille. Access to the controls is gained
by rotating the grille up. ON/OFF switch is located on
the front surround. See Figure 1.
Minimum inlet gas supply pressure for purpose of input
adjustment is 4.5 inches w.c. (1.13kPa) for natural gas
and 11 inches w.c. (2.75kPa) for propane. Manifold
(outlet) pressures should be set at 3.2 inches w.c.
(.80kPa) for natural gas models and 9.6 inches w.c.
(2.40kPa) for propane models.
In planning the installation for the insert it is necessary
to determine where the unit is to be installed, and
whether optional accessories (wall switch, thermostat,
or remote control) are desired. Gas supply piping
should also be planned. Model ATS-AUST has a fac-
tory installed fan.
This model is designed to be installed in a masonry or
factory-built fireplace. The separate 3-inch (76mm) com-
bustion air and exhaust pipes must be run up through
the chimney and terminated vertically. Horizontal flue
terminations MUST NOT be done.
Before starting installation of flue kits, the installer should
read the Gas Fireplace Instructions and the Flue Kit
Instructions to ensure that a proper flue installation is
completed.
Consult your local Building Codes before beginning the
installation.
WARNING:
THIS GAS FIREPLACE AND FLUE
ASSEMBLY MUST BE FLUED DIRECTLY TO THE
OUTSIDE AND MUST NEVER BE ATTACHED TO A
CHIMNEY SERVING A SEPARATE SOLID FUEL
BURNING APPLIANCE. EACH GAS APPLIANCE
MUST USE A SEPARATE FLUE SYSTEM.
CAUTION: Prior to connecting the flue system to
the unit, read sections:
1.3 Connecting the Gas Supply
1.4 Accessory Fan
1.2
FLUE SYSTEM
1.2.1 FLUE SYSTEM APPROVALS
Table 1 and Figures 3-5 show the flue termination caps
and systems approved for use with these models. Ap-
proved flue system terminations are labeled for identi-
fication. 3-inch (76mm) diameter listed flexible alumi-
num or stainless steel gas flue is used for both the
incoming combustion air and exhaust flue pipes. NO
OTHER FLUEING SYSTEMS OR COMPONENTS MAY
BE USED. Detailed installation instructions are included
with each flue termination kit and should be used in
conjunction with this manual.
HORIZONTAL FLUEING
The flue system on this model CANNOT be terminated
horizontally.
VERTICAL FLUEING
The flue pipes MUST be connected to the proper col-
lars on the unit AND the exhaust flue pipe MUST be
connected to the termination cap or the unit will not
operate. The combustion air flue pipe MUST be con-
nected to the termination cap.
NOTE:
The minimum vertical rise (exhaust flue) is
14 feet (3.5M) and the maximum vertical rise is 40 feet
(10M). These dimensions are measured from the start-
ing collars of the unit to the end of the last section of
flue pipe (See dimension V in Figure 3).
A vertical flue termination system installed on this
model will include one (1) length of 3-inch (76mm)
flexible flue pipe for the combustion air, one (1) length
of 3-inch (76mm) flexible flue pipe for the exhaust, one
(1) pipe-to-cap adaptor, and one (1) SLK-991DA Verti-
cal Termination Kit.
7
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