S S – terminals for LAT capacity control. Heat Pump application requires the LAT
Connect W2 from controller to electric heat terminal of air handler for units with electric heat. The LAT sensor must be
installed in the supply air stream, between the indoor coil and electric strip heat elements.
Thermostats – Standard Heat Pump thermostat is required for STAT 1.
Gas/Electric thermostats are required for STAT 2 and STAT 3.
Zone Damper Terminals – refer to “Wiring – Zone Dampers” on page 5.
Transformer – Damper Transformer 24vac 40va 2 amp fuse.
JP1 – Place in “O” position for unit energizing reversing valve for cool; place in “B” position for unit energizing reversing valve
in heat.
JP2 – Heat Pump or Gas/Electric jumper is used to configure controller. Factory set for Gas/Electric operation.
4
24V 40VA Transformer
to Power Dampers
W-O/B
O/B
G
W2
Y
R
C
AIRFLOW
BYPASS
DAMPER
1
1
2
2
3
3
TR1
TR2
R Y O/B W2 G C
R Y W G C
R Y W G C
R
Y
G
W-O/B
W2
C
O O O
LED
Y
O/B W
W2
G
DPR1
DPR2
DPR3
GE
HP
B
POWER
SWITCH
DIGI3U
A/C UNIT TERMINAL
DAMPER OUTPUTS
STAT 2
STAT 3
STAT 1
O
PWR
CONTROL CHIP
O
O
LED
S S
JP1 JP2
W
HEAT PUMP STAT
ZONE #1
GAS/ELECTRIC STAT
ZONE #3
R Y W G C
R Y W G C
R Y O/B W2 G C
GAS/ELECTRIC STAT
ZONE #2
E
WIRING – HEAT PUMP DIGI3U
1
1
2
3
4
5
6
7
2
3
4
5
6
7
Follow this diagram for Heat Pump applications.
