9
Step 4: Customizing the Thermostat
◆ Settings
System
Cool: The thermostat controls the cooling.
Off: The heating and cooling systems are off.
Heat: The thermostat controls the heat.
AUTO:The thermostat automatically selects heat or cool depending
on the temperature.
Fan
Auto:Equipment controls the fan.
On: The fan operates continuously.
Temperature
The default setpoint temperature for heating is 70°F (21°C), for cool-
ing is 78°F (25°C), and for auto is 72°F (22.0°C). After putting the sys-
tem switch in heat, cool, or auto, press either the ٚ or
ٙ
button to
adjust the temperature setting up or down.
The display will return to the current room temperature five seconds after
the last input and the new setpoint will be saved.
◆ Temperature Differential and Deadband
The temperature differential is factory set at 1°F (0.5°C). This means that
whenever the room temperature changes by one degree Fahrenheit
from the temperature setting, the system will turn on. If the system turns
on too often, increase the temperature differential.
Although programmed at the same time as the temperature differen-
tials, the deadband is used only during the AUTO mode. In the AUTO
mode, the thermostat will automatically cycle either the heating or cool-
ing system to maintain optimal comfort. The deadband is the minimum
allowable temperature which must occur to switch to the opposite
mode. For example, if the deadband is set at 3°F (1.5°C)and the setpoint
is set at 70°F, the thermostat will switch to cooling mode when the tem-
perature reaches 73°F.
NOTE: IF THE TEMPERATURE LIMITING JUMPER J3 IS CUT
(FIGURE 7), THE DEADBAND IS NOT ADJUSTABLE AND IS
AUTOMATICALLY SET TO 6°F (3°C).
