ION SYST0101CW Installation Instructions Manual page 53

User Interface
DX+
DX-
C
R
S1
S2
Connection Diagram for FCM Fan Coil with Non-communication
Variable-Speed
Green - Data A
Yellow - Data B
White - COM
Red - 24VAC
Optional Remote
Room Sensor
Humidifier
Connection
1-Stage Heat Pump
Fan Coil
DX+
DX-
Communications
Connection
C
R
HUM
C
G
R
O
W
Y
OAT
53
1-Spd.
Non-communicating
HP
C
R
O
W2
Y
OAT
Sensor
A12355I