10
electrical diagramS
Figure 7
Figure 7. Wiring diagram for 2, 2.5, 3, 3.5 ton models (with pSc motor)
Single Phase
1. Couper le courant avant de faire letretien.
2. Employez uniquement des conducteurs en cuivre.
3. Ne convient pas aux installations de plus de 150 volt a la terre.
710388B
(Replaces 710388A)
0109
WIRING DIAGRAM
Split System Air Conditioner (Outdoor Section)
NOTES:
1. Disconnect all power before servicing.
2. For supply connections use copper conductors only.
3. Not suitable on systems that exceed 150 volts to ground.
4. For replacement wires use conductors suitable for 105 deg C.
5. For ampacities and overcurrent protection, see unit rating plate.
6. Connect to 24 vac/40ca/class 2 circuit. See furnace/airhandler installation
instructions for control circuit and optional relay/transformer kits.
7. Anti-Short Cycle Timer (ASCT) may or may not be installed in the unit. If desired,
ASCT is factory installed on select models only or may be field installed as shown using
manufacturer’s approved kit. If not present, connect Yellow and Black wires per Note 6.
FIELD WIRING
LEGEND:
LOW VOLTAGE
HIGH VOLTAGE
¢710388B¤
CC - Contactor Coil
CCH - Crankcase Heater
HPS - High Pressure Switch
208/230V
CC
ASCT
ASCT
(SEE NOTE 7)
H
C
F
CCH
(OPTIONAL)
R
C
S
S
C
R
L2
T2
COMPRESSOR
CONTACTS
L1
T1
COMPRESSOR
OUTDOOR FAN
MOTOR
24 VOLT FIELD
CONNECTIONS
HPS
HPS
T2
T1
T3
ASCT
(SEE
NOTE 7)
GROUNDING
SCREW
L1 L2 GND
T1
T2
L1
L2
OUTDOOR
FAN MOTOR
C
S
DUAL
CAPACITOR
R
3
1
2
START
CAPAC
START
RELAY
BLACK
BLUE
ORANGE
YELLOW
CONTACTOR
YELLOW
BLACK
RED
CRANKCASE
HEATER
(OPTIONAL)
YELLOW BLACK
SEE NOTE 6
RED OR
YELLOW
BLACK
RED OR
RED BLACK
BLACK OR
BLK WHT
C
S
R
YELLOW
OR
YELLOW
BLACK
RED OR
RED BLACK
H
C
F
component FunctionS
high pressure Switch (hpS) - A high-pressure switch is factory-installed and located in the liquid line internal to
the outdoor unit. The switch is designed to protect the system when very high pressures occur during abnormal
conditions. Under normal conditions, the switch is closed. If the liquid pressure rises above 575 psig, then the switch
will open and de-energize the outdoor unit. The switch will close again once the liquid pressure decreases to 460
psig. Please note that the switch interrupts the thermostat inputs to the unit. Thus, when the switch opens and then
closes, there may be a 5 minute short cycling delay before the outdoor unit will energize.
low-pressure Switch - (Select Models) A low-pressure switch is factory-installed and located in the suction line
internal to the outdoor unit. The switch is designed to protect the compressor from a loss of charge. Under normal
conditions, the switch is closed. If the suction pressure falls below 5 psig, then the switch will open and de-energize
the outdoor unit. The switch will close again once the suction pressure increases above 20 psig. Please note that the
switch interrupts the thermostat inputs to the unit. When the switch opens and then closes, there will be a 5 minute
short cycling delay before the outdoor unit will energize.
