Johnson Controls R-410A - Page 126

505429-JTG-L-0512
126 Johnson Controls Unitary Products
Typical Field Wiring Diagram - Single 4-Pipe Evaporator Unit with Twin Condenser Units
NOTE: On non J**NC/ND Evaporator models, isolation
relays must be installed to avoid overloading on 75
VA transformers on the condensing unit.
RC
Y2
G W1
THERMOSTAT
TWO STAGE COOLING
SINGLE STAGE HEATING
RC
Y2
G W1
THERMOSTAT
TWO STAGE COOLING
SINGLE STAGE HEATING
Y1
Y1
X
X