HEIL CCA9 Installation Instructions Manual page 14

INSTALLATION INSTRUCTIONS
Observer Communicating Wall Control Four−Wire Connection Wiring Diagrams
Figure 11
Wall Control
DX+
DX−
C
R
S1
Optional Remote
Room Sensor
S2
FVM Fan Coil Wiring With
Figure 12
Two−Stage Air Conditioning
Indoor Control
Heat Stage 2
O/W2
Heat Stage 1
W/W1
Y1/W2
Cool Stage 1
Cool Stage 2 Y/Y2
Fan
G
24 VAC Hot R
Dehumidify DHUM
24 VAC Comm C
HUM
Humidify
RVS Heating
B
S1
Outdoor
S2
14
(See Thermostat Installation Instructions for specific unit combinations)
Variable Speed
Furnace/Fan Coil
Green
Yellow
White
Red
Humidifier
Connection
Two-Stage Air Conditioner
Fan Coil
W2
Remove J2 Jumper
For Heat Staging
W1
Y1 Y1
Y2
Y/Y2
G
R
O
H
C
C
Humidifier
(24 VAC)
Outdoor
Sensor
R−410A Split System Air Conditioner
Green
DX+
Yellow
DX−
C
R
HUM
COM
Figure 13
ICP Thermostat
W2
Y1
W1
Y2
G
R
H
C
L
O/B
OD
GND
Outdoor
DX+
DX−
C
LEGEND
24V FACTORY WIRING
24V FIELD WIRING
FIELD SPLICE CONNECTION
Variable Speed Furnace with
Two−Stage Air Conditioner
Two-Stage
Variable Speed
Heat Pump
Furnace
W2
Y1
W/W1
Y/Y2
G
R
DHUM
COM
HUM
OUTDOOR
SENSOR
421 01 1701 00
Y1
Y2
C