11
Installation Instructions
The Thermostat Backplate
R
24 VAC return
G
Fan relay
W1/O/B
1st stage heat circuit
W2
2nd stage heat circuit
Y1
1st stage compressor relay
Y2
2nd stage compressor relay
W3
3rd stage heat circuit
C
24 VAC common
OUTDOOR Outdoor sensor
SENSOR connections
REMOTE
Remote sensor
SENSOR connections
DRY
Dry Contact
CONTACT connections
IMPORTANT: This thermostat requires both R (24 VAC Return) and
C (24 VAC Common) be connected to the backplate terminals.
To remove the thermostat
backplate: Gently separate
the display from the base by
pulling first from one side,
then the other until the two
pieces unsnap.
When stat is NOT mounted on wall...
R
G
W1/O/B
W2
Y1
Y2
W3
DEHUM
HUM
C
AUX
REMOTE SENSOR
OUTDOOR SENSOR
DR
Y
CONTAC
T
