Hearthstone Quality Home Heating Products, Inc.
Tucson DX/ST Model 8702
8
Proflame Control System & Features
NOTE: OPEN DOOR UNDER THE ASH LIP AND REMOVE MODESTY PANEL FOR ACCESS TO ELECTRICAL
AND GAS CONNECTIONS.
Tucson 8702 ST Model Overview
Power Supply
For the Tucson ST
the power supply is the AC/DC
Power Adapter. This is packaged inside the
accessory box. To connect the adapter, simply
connect the output lead to the wire under the stove
marked “DC-SUPPLY”. Plug the input end into the
nearest 120V standard outlet.
Thermostat (sold separately)
You can connect to and control the Tucson ST with a
wall thermostat. The ON/OFF/T’stat switch or wall
mounted thermostat controls the Tucson. We
recommend installation of a thermostat for more
comfortable performance, however you may still
override the thermostat by setting the switch to “ON”.
The thermostat controls the unit by “calling for heat.”
The thermostat turns the unit on when the room is
cold, and turns the unit off once the room is warmed
sufficiently. The thermostat is controlled by a 750
millivolt DC two-wire circuit.
Thermostat Placement
Place the thermostat in the same room or living
space as the unit. Typically 5’ (1.5m) off the floor and
away from any influences that may cause the
temperature in the vicinity of the thermostat to be
unrepresentative of the room temperature in general.
Such influences might include strong lighting, a
heater vent from the central heating system, or a
nearby drafty window.
Placement of the thermostat on an inside wall rather
than an outside wall is preferable. Do not place the
thermostat directly behind or too close to the unit,
otherwise, heat from the unit will immediately satisfy
the thermostat and turn the unit off.
Thermostat Wiring (sold separately)
Connect the thermostat to the Tucson ST using no
more than 40’ (12 m) of insulated thermostat wire.
The thermostat wire can be surface mounted or
routed under the floor, through walls, etc. Ensure you
leave a small coil of additional thermostat wire behind
the Tucson so that the unit is easily moved out of
position for servicing and cleaning.
Connect the thermostat wires to the wire harness
with the provided connection kit as per the
instructions on
page 26
. At the thermostat, connect
the wires to the thermostat per the instructions
received with the thermostat. Take care not to over-
tighten the connection screws and not to damage the
internal parts of the thermostat.
Proflame DFC Ignition Module
This is the command center for the appliance. The
DFC Module allows the pilot to run in the IPI mode or
the CPI mode. It signals the burner to light or shut
down and provides the ignitor with the electricity
needed for sparking. The DFC Module is powered by
the DC adaptor when 120V power is available or by
the backup batteries during a power outage.
SIT Manual Gas Valve
The valve has a manual flame turndown knob. This
control manually adjusts the flame height at the
desired level. All the gas flows through the valve and
is regulated by the built in regulator.
Pilot Assembly
The pilot assembly consists of a pilot hood, sensor
rod, and ignitor. The ignitor sends a spark to the pilot
hood which ignites the gas and lights the pilot. With
the pilot lit the sensor rod is engulfed by the flame,
flame rectification occurs and the appliance remains
lit. If the sensor does not stay engulfed by the flame
the main burner will not light and the pilot will shut
down.
Optional Remote Control (for ST model)
The Tucson ST does not come equipped with a
remote control. However there are two different
optional remote controls available. Both of the remote
controls are capable of turning the unit on and off.
One of the optional remotes also allows you to
control the temperature of the stove, (in the same
way the thermostat controls the heater), from
anywhere in the vicinity of the unit. If “ON” & “OFF”
are the only controls required, use Kit #90-56912. If
you would like to control the temperature via the
remote control thermostat, use Kit #90-56914.
Installation instructions are provided with the kits.
