OWNER’S MANUAL MODEL: 8745 TUCSON Vent-Free HEATER
-11-
ELECTRICAL CONNECTIONS
NOTE:
OPEN VALVE DOOR UNDER ASH LIP
FOR ELECTRICAL AND GAS CONNECTIONS
Thermostat
The Tucson may use the wall mounted thermostat for
operation, or the on/off/tstat switch. 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. Both the thermostat
and 40' of thermostat wire are included as standard
equipment.
Thermostat Placement
The thermostat should be placed in the same room or
living space as the unit. Typically 5' 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.
Violet
Black
Yellow
On/Off/T-stat
Figure 4 Wiring diagram
Thermostat Wiring
The thermostat wire from the unit to the thermostat
can be surface mounted, routed under the floor, or
through walls, etc. The thermostat should be
connected to the unit using the 40' , or as much as
needed, of insulated thermostat wire provided. Be
sure to leave a small coil of wire behind the unit so
that it can be moved out of position for servicing and
cleaning.
The proper location of wire connections is shown
below and in Figure 10. When making these
connections, position the thermostat wire so it
extends towards the wall behind the unit, then
towards the thermostat. (At the thermostat, the wires
should be connected to the two connection screws on
the back of 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. Now attach the wires
in their proper location, shown in Figure 10.
Location of Wire Connections:
WIRE
LOCATION
LABEL
Thermostat(2 wires) 1- Top Post on Valve TH
1- On/Off/T-stat switch Yellow wire
Thermopile(2 wires)
1- Bottom Post
TP/TH
1- Middle Post
TP
