Johnson Controls R-410A - Page 127

505429-JTG-L-0512
Johnson Controls Unitary Products 127
Typical Field Wiring Diagram - Twin J07NC Evaporator Units with 4-Pipe Condenser Unit
NOTE: On non J**NC/ND Evaporator models, isolation
relays must be installed to avoid overloading on 75
VA transformers on the condensing unit.
R C
Y1
G W1 R C
Y1
G W1
THERMOSTAT
SINGLE STAGE COOLING
TWO STAGE HEATING
W2 W2
THERMOSTAT
SINGLE STAGE COOLING
TWO STAGE HEATING
X X