430648-JIM-D-1010
18
Johnson Controls Unitary Products
Figure 10: Typical Field Wiring Diagram - Twin J07NC Evaporator Units with J15YD 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