Source 1 S1-THSU301-S - The Thermostat Backplate

10
Installation Instructions
The Source 1 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
C 24 VAC common
OUTDOOR Outdoor 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. A small screwdriver
may be used, very carefully, to start
seperating the two pieces.
R
G
W1/O/B
W2
Y1
Y2
W3
DEHUM
HUM
C
AUX
REMOTE
SENSOR
OUTDOOR
SENSOR
DRY
CONTACT
When stat is NOT mounted on wall...