— 8 —
CONDENSING UNIT WIRING DIAGRAM
SYSTEM START-UP / FINAL CHARGE ADJUSTMENT
• Set temperature setting on thermostat at least 3 degrees below the current indoor temperature in the house.
• Allow the unit to run for 15 minutes.
• Attach thermocouples to both the liquid and vapor lines within 2 feet of service valves.
• Place third thermocouple to sense outdoor air temperature near unit.
• Record low pressure and high pressure on the gauge set.
• Record thermocouple temperatures of liquid line, vapor line, and outdoor temperature.
• Record indoor air temperature near return duct.
• Refer to temperature-pressure chart for proper refrigerant.
• Look up low pressure reading on Table 5. Record saturated vapor temperature corresponding to the suction
pressure.
• Calculate actual superheat as follows:
SH = T
vapor line
- T
sat. vapor
• Look up high pressure reading on Table 6. Record saturated liquid temperature corresponding to the liquid
line pressure.
• Calculate actual subcooling as follows:
SC = T
Iiquid line
- T
sat liquid
Condenser
Motor
Capacitor
Power Supply
Factory Wiring 208/230VAC, 60Hz
Field Wiring 208/230VAC, 60Hz
Field Wiring 24VAC, 60Hz
Ground
Compressor
S
L1
L2
R
W
Y
G
C
Y
C
L1
L2
GND
T1
T2
R
Yellow
Yellow
Black
Red
Red
Contactor
• Indoor Air Handler
• Gas Furnace
Black
C
CONDENSING UNIT
Fig. 7
