430648-JIM-D-1010
Johnson Controls Unitary Products
17
Figure 9: 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.
R
C
Y2
G
W1
THERMOSTAT
TWO STAGE COOLING
SINGLE STAGE HEATING
R
C
Y2
G
W1
THERMOSTAT
TWO STAGE COOLING
SINGLE STAGE HEATING
Y1
Y1
X
X