International comfort products N4H3 Installation Instructions Manual page 10

INSTALLATION INSTRUCTIONS
Figure 10
NOTE: WHEN USING OUTDOOR THERMOSTATS, W
SYSTEMS WITH ONE OUTDOOR THERMOSTAT
INDOOR
THERMOSTAT
SPLICE
SUBBASE
CONNECTION
W
3
C
C
W E
2
W
2
L
G
G
Y
E
O
R
R
REMOVE WIRES FROM CRIMP NUT IN INDOOR FAN COIL WHEN INSTALLING OUTDOOR THERMOSTATS.
SYSTEMS WITHOUT OUTDOOR THERMOSTATS
THERMOSTAT
SUBBASE
C
W
2
L
G
Y
E
O
R
10
Typical Thermostat (Control Circuit) Connections
MUST BE ENERGIZED WHEN REQUESTING SUPPLEMENTAL HEAT.
2
OUTDOOR
DEFROST
SPLICE BOARD
CONNECTION
C
W
2
ODT
Y
O
R
INDOOR
OUTDOOR
SPLICE SPLICE
CONNECTION
CONNECTION
C
C
W W
2 2
G
Y
O
R
R
R−410A Split System Heat Pump
SYSTEMS WITH TWO OUTDOOR THERMOSTATS
THERMOSTAT INDOOR
SUBBASE SPLICE
CONNECTION
W
3
C
C
W
2
W
2
L
G
G
Y
E
EHR
E
O
R
R
DEFROST
BOARD
EHR
SHR
OUTDOOR
DEFROST
SPLICE BOARD
CONNECTION
ODT
SHR C
W
2
SHR
Y
ODT
O
R
LEGEND
24 −V FACTORY WIRING
24 −V FIELD WIRING
FIELD SPLICE CONNECTION
OUTDOOR THERMOSTAT
EMERGENCY HEAT RELAY
SUPPLEMENTAL HEAT RELAY
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