DCN: 140-02302-01
Page 13
Setting the System Mode: Off, Heat, Cool, Auto
System Modes
OFF
: System is off. No heating or cooling will come on. If system was on, it will turn
off immediately.
HEATING:
Only heating will occur.
COOLING:
Only cooling will occur.
AUTO:
Heating or cooling will come on according to the heating and cooling
setpoints. The system will automatically switch between heating and cooling modes
as needed to maintain the setpoints.
Special Heat Pump Mode: Emergency Heat
EHEAT:
An additional system mode, “EHEAT” for Emergency Heat will be displayed
if the HVAC system type is set to Heat Pump. If
there is a compressor failure with the
Heat Pump system, setting the mode to EHEAT will allow the supplemental Aux heat
to come on first whenever there is a call for heating. It also disables the compressor
output to prevent further damage to the HVAC system.
Press the
UP or
DOWN buttons
or
MODE button
to select the
desired system
mode
.
System Mode change screen
Press Mode button to
change system mode
Press “DONE” button to select the mode and exit back to the main
thermostat screen or wait for the screen to automatically time out.
Done
MODE
SYSTEM MODE
OFF
HEATING
COOLING
AUTO
4:30 PM
75
MENU
HEAT
MODE
HOLD
64H
82C
AUTO
FAN
Sys Off
Thermostat Name
DCN: 140-02302-01
Page 14
Setting Fan Mode and System Status Indicators
Optional Fan Mode
Fan Cycler.
If the Fan Cycler feature is enabled in the Installer Setup, the additional fan
mode “
Cycle
” will be shown in the Fan Mode menu. This mode cycles the fan on and off
continuously for fresh air ventilation according to the settings in the Installer Setup.
System Status Indicators
When the main thermostat screen is displayed, the on-screen labels indicate the following.
System Operation mode indicator
“SYS OFF” displayed > System is OFF
“SYS MOT”
1
displayed > System is OFF and Minimum Off Time (MOT) delay On is active
“HEAT ON” displayed > System is ON and heating
“COOL ON” displayed > System is ON and cooling
“HEAT MRT”
2
displayed > System is ON and heating. Minimum Run Time (MRT) delay off
is active.
“COOL MRT” displayed > System is ON and cooling. Minimum Run Time (MRT) delay off
is active.
Staging display
“2
nd
Stg” displayed > Stage 2 heating or cooling is ON
“Aux Heat” displayed > Stage 3 heating is ON
For Heat Pump systems only: “EHEAT” > emergency heat mode active
Home/Away display
Home
mode is active (current setpoints are being used)
Away
setback mode is active (setback setpoints are being used)
System Alerts
Alert Text displayed > Specific alert text (Filter or Maintenance Timer)
Notes 1 and 2: See MOT and MRT descriptions on page 18
Press the Fan button to change the Fan mode
AUTO FAN: Fan automatically operated by the HVAC system.
FAN ON: Manual Fan mode. Fan stays on until mode is changed back to Auto.
System
Status
Indicators
75
MENU
HEAT
MODE
HOLD
64H
82C
AUTO
FAN
Sys Off
2
nd
Stg
Filter
4:30 PM
Thermostat Name
