Cooling Control; Adjusting Temperature Setpoint; Fan Control - Lennox ComfortSense 3000 Series Operation Manual

When the actual temperature rises above the temperature
setpoint, the flame icon will disappear. This indicates that
the heating demand has been satisfied and that the heating
equipment has been turned off.
NOTE: The heating equipment is activated for at least
3 minutes if no buttons are pressed during the
demand interval.

Cooling Control

The COOL button is located behind the small door on the
right-hand side of the thermostat. See figure 3.
Enabling and Disabling Cool Mode
Use the COOL button to enable or disable cool mode as
necessary. If the thermostat is in off mode, cool mode is
enabled when the COOL button is pressed. This is indicated
by COOL in the SYSTEM box.
If the thermostat is in cool mode, cool mode is disabled
when the COOL button is pressed. This is indicated by OFF
in the SYSTEM box.
Cooling Demand
The thermostat must be in cool mode in order to properly
control the cooling equipment. When in cool mode, if the
room temperature is higher than the temperature setpoint,
a cooling demand is detected by the thermostat.
The thermostat will then activate the cooling equipment
to satisfy the demand. Cooling operation is indicated by a
snowflake icon in the SYSTEM box as shown in figure 8.
When the actual temperature drops below the temperature
setpoint, the snowflake icon will disappear. This indicates
that the cooling demand has been satisfied and that the
cooling equipment has been turned off.
Figure 7. Cooling Demand
NOTE: The cooling equipment is activated for at least
4 minutes if no buttons are pressed during the
demand interval. Cooling equipment operation is
locked out for 5 minutes after a demand has been
satisfied. If another cooling demand occurs during
this 5-minute interval, the snowflake icon will flash;
however, the cooling equipment will not run until the
5-minute delay has elapsed.

Adjusting Temperature Setpoint

The temperature setpoint
temperature of the space around the thermostat. The
default temperature setpoint is 70°F. To adjust the setpoint,
press the UP or DOWN arrow keys to the right of the display
screen.
The existing setpoint will be displayed just below the
actual room temperature as shown in figure 8. Use the UP
or DOWN arrow keys to adjust the setpoint up or down.
The setpoint will increase by 1°F each time the UP key is
pressed. The setpoint will decrease by 1°F each time the
DOWN key is pressed.
Figure 8. Setpoint Display and Adjustment
Use the UP or DOWN arrow keys to adjust the setpoint up
or down. The setpoint will increase by 1°F each time the UP
key is pressed. The setpoint will decrease by 1°F each time
the DOWN key is pressed.
After the desired setpoint is reached, the HOME screen will
reappear after about 8 seconds.

Fan Control

The FAN button is located behind the small door on the
right-hand side of the thermostat. See figure 3. The FAN
button can be used to select either continuous fan mode or
auto fan mode.
If continuous fan mode is enabled, the fan will run
continuously regardless of whether the heating or cooling
equipment is running. Also, ON will be displayed in the FAN
box as shown in figure 9.
Figure 9. Fan ON with Icon
3
represents the desired