18
13.3 CONTROL WIRING
(See Figure 5)
If the low voltage control wiring is run in conduit with the power supply, Class I insu-
lation is required. Class II insulation is required if run separate. Low voltage wiring
may be run through the insulated bushing provided in the 7/8 hole in the base
panel, up to and attached to the pigtails from the bottom of the control box. Conduit
can be run to the base panel if desired by removing the insulated bushing.
A thermostat and a 24 volt, 40 VA minimum transformer are required for the control
circuit of the condensing unit. The furnace or the air handler transformer may be
used if sufficient. See the wiring diagram for reference. Use Table 5 to size the 24
volt control wiring.
TABLE 4
VOLTAGE RANGES (60 HZ)
Operating Voltage Range at Copeland
Nameplate Voltage
Maximum Load Design Conditions for
Compressors
208/230 (1 Phase)
197 - 253
208/230 (3 Phase)
187 - 253
460
414 - 506
575
517 633
FIGURE 5
CONTROL WIRING FOR AIR HANDLER
NOTES:
1. Jumper “E” to “W2” to
transfer control of
supplemental heat to
1st stage when the
emergency heat switch
is on.
2. This wire turns on heat
for defrost, omit for most
economical operation.
3. Wire with colored tracing
stripe.
SOLID COPPER WIRE - AWG.
3.0
16
14
12
10
10
10
2.5
16
14
12
12
10
10
2.0
18
16
14
12
12
10
50
100
150
200
250
300
Length of Run - Feet (1)
Thermostat Load - Amps
(1) Wire length equals twice the run distance.
NOTE: Do not use control wiring smaller than No. 18 AWG between thermostat and outdoor unit.
TABLE 5
FIELD WIRE SIZE FOR 24 VOLT THERMOSTAT CIRCUITS
B
W2
G
Y
W1
B
ODD
C
R
Air Handler
Y
G
W2
E
Heat Pump Thermostat
Heat Pump
Outdoor Unit
Y
B
C
R
R
D
C
Y
Field Installed
Line Voltage
-
WIRING INFORMATION
Factory Standard
-
W/BL
G/BK
Y
W/BK
G/Y
BR
BL
R
NOTE: RED WIRE REQUIRED WITH RANCO DDL DEMAND DEFROST CONTROL.
TYPICAL THERMOSTAT:
HEAT PUMP WITH
ELECTRIC HEAT
