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SCROLL/SET-UP BUTTONS – The Scroll/Set-Up buttons function with the set-up features of
the thermostat (refer to page 7).
MODE BUTTON – Five modes of operation are available on the Model 8870 thermostat:
OFF, COOL, HEAT or COOL, EM. HEAT (for heat pumps only), and HEAT. The mode of
operation indicates how you want your heating and cooling equipment to operate.
ADJUST BUTTON – The Adjust buttons adjust the heating and cooling
temperature settings.
FAN BUTTON – The fan can be operated continuously (FAN ON) or only when there is a
need to heat or cool.
ENTER (NETWORK OVERRIDE) BUTTON – The Enter button is used to override the home
automation system, to clear temporary flashing messages on the message display and with
the set-up features of the thermostat.
MAIN DISPLAY – The MAIN DISPLAY (see Figure 2) provides the mode status, temperature
and system status information.
• MODE STATUS – Shows the current mode of operation: OFF, COOL, HEAT or COOL,
EM. HEAT (for heat pumps only), and HEAT. The current mode will flash to show when
the equipment is running.
• SET POINTS – Shows the Heating and/or Cooling temperature settings.
• FAN STATUS – FAN ON indicates the fan is set to operate continuously.
• LOCKOUT – The lockout setting shows the thermostat buttons have been locked out
and the thermostat settings can not be changed at the thermostat.
• ROOM TEMPERATURE – Shows the current room temperature. The temperature can
be displayed in °F or °C. This would show relative humidity (%) if the thermostat has
been installed with an optional humidity control senor.
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