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1.0 INSTALLATION INSTRUCTIONS
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 masonry
fi replace or factory built fi replace. These units CAN-
NOT be recessed inside combustible construction.
Minimum dimensions of the masonry or factory-built
fi replace into which these models can be installed, are
32 1/8-inches (816 mm) width x 13 1/2 -inches (343
mm) depth x 20 1/2 inches (521 mm) height.
WARNING: THIS UNIT IS NOT FOR USE WITH
SOLID FUEL.
This unit MUST use the fl ue termination described in
the fl ueing section of the manual.
The control system for this model is 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 Figures 1 and 7.
Minimum inlet gas supply pressure for purpose of input
adjustment is 4.5 inches w.c. (1.13 kPa) for natural gas
and 11 inches w.c. (2.75 kPa) for propane. Manifold
(outlet) pressures should be set at 3.2 inches w.c. (.80
kPa) for natural gas models and 9.6 inches w.c. (2.40
kPa) for propane models.
In planning the installation for the insert it is neces-
sary 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-AU-D has a fac-
tory installed fan.
This model is designed to be installed in a masonry or
factory-built fi replace. The separate 3.3 inch (84 mm)
combustion air and exhaust pipes must be run up
through the chimney and terminated vertically. Hori-
zontal fl ue terminations MUST NOT be done.
Before starting installation of fl ue kits, the installer
should read the Gas Fireplace Instructions and the Flue
Kit Instructions to ensure that a proper fl ue installation
is completed.
Consult your local Building Codes before beginning
the installation.
8
Heat & Glo • ATS-AU-D • 327-900 Rev. F • 6/09
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 fl ue system to
the unit, read sections:
1.3 Connecting the Gas Supply
1.4 Fan
1.2 FLUE SYSTEM
1.2.1 FLUE SYSTEM APPROVALS
Table 1 and Figures 3-5 show the fl ue termination
caps and systems approved for use with this model.
Approved fl ue system terminations are labeled for
identifi cation. 3.3 inch (84mm) diameter listed fl exible
aluminum or stainless steel gas fl ue is used for both
the incoming combustion air and exhaust fl ue pipes.
NO OTHER FLUEING SYSTEMS OR COMPONENTS
MAY BE USED. Detailed installation instructions are
included with each fl ue termination kit and should be
used in conjunction with this manual.
HORIZONTAL FLUEING
The fl ue system on this model CANNOT be terminated
horizontally.
VERTICAL FLUEING
The fl ue pipes MUST be connected to the proper col-
lars on the unit AND the exhaust fl ue pipe MUST be
connected to the termination cap or the unit will not
operate. The combustion air fl ue pipe MUST be con-
nected to the termination cap.
NOTE:
The minimum vertical rise (exhaust fl ue) is
10 feet (3M) 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
fl ue pipe (See dimension V in Figure 3).
A vertical fl ue termination system installed on this
model will include one (1) length of 3.3 inch (84 mm)
fl exible fl ue pipe for the combustion air, one (1) length
of 3.3 inch (84 mm) fl exible fl ue pipe for the exhaust,
one (1) LINK-DV30B Vertical Termination Kit.
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