6
Make Electrical Connections
IMPORTANT:
■
Electrical wiring, disconnect means and over-current
protection are to be supplied by the installer. Refer to the
rating plate for the maximum over-current protection,
minimum circuit ampacity, and operating voltage. See wiring
diagrams later in this section.
■
Install an adequately sized branch circuit disconnect,
according to the NEC, within sight of and readily accessible
from heat pump.
■
The cable or conduit and fittings connected from the
disconnect to the heat pump shall be rated for outdoor use.
Single Phase Electrical Connections
1. Disconnect power.
2. Remove control box cover.
3. Connect the field supply wires L1 and L2 to contactor
terminals L1 and L2.
4. Connect ground wire to ground lug.
5. Connect low voltage circuit.
Typical Wiring Connection (low voltage circuit)
6. Replace control box cover.
7. Reconnect power.
WARNING
Rating Plate Ampacity
Less than 15
16 - 20
21 - 30
AWG
14
12
10
8
31 - 50
Electrical Shock Hazard
Electrically ground condensing unit or heat pump.
Connect ground wire to ground lug.
Use copper wire for supply connection.
Correct wire gauge is shown in the chart below.
Failure to follow these instructions can result in
death or electrical shock.
WARNING
Electrical Shock Hazard
Disconnect power before servicing.
Replace all parts and panels before operating.
Failure to do so can result in death or electrical shock.
A. Ground lug
B. Field supply ground wire
C. 208/230 volt field supply wires
A. Do not connect C (common) connection between
indoor unit and thermostat except when required
by the indoor thermostat. Refer to the thermostat
installation instructions.
B. C (common) connection between indoor unit and
outdoor unit required for proper operation.
T1
T2
L1
L2
L1
L2
C
A
B
R
C
Y
O
W
Thermostat
Indoor Unit
Outdoor Unit
24V Control Wiring (NEC Class 2)
R
C
Y
O
G
R
C
W
G
W
A
B
