SYSTEM CONTROLLER OPERATIONS – DIGI3U
7
Y
W-O/B
W2
G
PWR
DPR
MODE
FUNCTION
OFF
OFF
OFF
OFF
OFF
OFF
OFF
Power off
OFF
OFF
OFF
OFF
ON
OFF
ON
Power on, blower off, all zones satisfied
OFF
OFF
OFF
ON
ON
0
Vent
Blower on, compressor off, all zones satisfied
OFF
OFF
OFF
ON
ON
1
Purge
Blower on, compressor off. DPR w/LED on are closed
ON
OFF
OFF
ON
ON
1
Cooling
Cooling stage, compressor on. DPR w/LED on are closed
OFF
ON
OFF
ON
ON
1
Heating
Heating stage, compressor off. DPR w/LED on are closed
OFF
OFF
OFF
ON
FL
1
LAT*
System in Low Temp cutout condition (Cooling)
OFF
OFF
OFF
ON
FL
1
LAT*
System in High Temp cutout condition (Heating)
STATUS LEDS/ GAS ELECTRIC MODE
NOTE:
The “O” and “B” jumpers have no effect on operation when the controller is set in GE mode.
1 =
One or more damper LEDs on
0 =
All damper LEDs off
* LAT Capacity Control. The factory optional thermistor is in place to function in this mode.
Changeover Gas/Electric:
While controller is operating in heat or cool,
if another thermostat places a call for the opposite mode, a changeover
sequence will begin. The controller will continue running in its current
mode for 15 minutes or until current call is satisfied, whichever occurs first.
After 15 minutes, or call satisfaction, a 3-minute purge will start. At the
end of the 3-minute time delay, the opposite call will begin. If there is
still an opposing call, changeover sequence will initiate and repeat
changeover cycle until opposing calls are satisfied.
When all calls are satisfied, LEDs will go off and a 3-minute time delay
will be initiated. During this time, controller will not allow any calls for
heat or cool.
Purge Mode:
When all calls are satisfied or a changeover occurs, a
3-minute recycle delay will be initiated. During this time, the controller
will not process any calls for heat or cool; and the compressor or gas
valve will shut down and blower will continue to run. All dampers go
open during this time
