Display − Home Screen
ROOM 70
FAN
AUTO
SYSTEM
HEAT
Figure 2
Figure 2 illustrates the HOME screen. Note that an indoor room temperature of 70°F is initially displayed. After about 1 minute of warm−up time, the actual room temperature will be displayed. HEAT mode is the system default (as indi- cated in the SYSTEM box at lower right).
A pale blue display backlight will turn on each time a key is pressed. The backlight will turn off 8 seconds after the last key is pressed.
Heating Control
The HEAT button is located behind the small door on the right−hand side of the thermostat. See figure 3.
Additional Thermostat Buttons
Figure 3
Enabling and Disabling Heat Mode
Use the HEAT button to enable or disable heat mode as de- sired. If the thermostat is in off mode, heat mode is enabled when the HEAT button is pressed. This is indicated by HEAT in the SYSTEM box as shown in figure 4.
Heat Mode Enabled
ROOM 69
FAN
AUTO
SETPOINT 64 SYSTEM
HEAT
Figure 4
If the thermostat is in heat mode, heat mode is disabled when the HEAT button is pressed. This is indicated by OFF in the SYSTEM box as shown in figure 5.
Heat Mode Disabled
ROOM 69
FAN
AUTO
SETPOINT 64 SYSTEM
OFF
Figure 5
Heating Demand
The thermostat must be in heat mode in order to properly control the heating equipment. When in heat mode, if the actual temperature is lower than the temperature setpoint, a heating demand is detected by the thermostat. The thermo- stat will then activate the heating equipment to satisfy the de- mand. Heating operation is indicated by a flame icon in the SYSTEM box as shown in figure 6.
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