Source 1 S1-THSU303-S User Manual

11
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
Y2 2nd stage compressor relay
W3 3rd stage heat circuit
HUM Humidifier control circuit
DEHUM Dehumidifier control circuit
C 24 VAC common
AUX Aux output
OUTDOOR Outdoor sensor
SENSOR connections
REMOTE Remote sensor
SENSOR connections
DRY Dry Contact
CONTACT connections
IMPORTANT: This thermostat requires connection of both R (24 VAC
Return) and C (24 VAC Common) 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
DRY
CONTACT

Source 1 S1-THSU303-S Specifications

General

Brand	Source 1
Model	S1-THSU303-S
Category	Thermostat
Language	English