505429-JTG-L-0512
122 Johnson Controls Unitary Products
Typical Field Wiring Diagram - J10 thru 20NC Evaporator Unit with J10 thru 20YC 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.
J10 - 20NC Liquid Line Solenoid Wiring
THERMOSTAT
TWO STAGE COOLING
TWO STAGE HEATING
G C
Y1
RW1 W2 X
Y2
NOTE: Liquid line solenoid is only activated during
second stage cooling operation.
219 / Y
218 / BR
1LLS
VALVE SYS 2
BLK
BLK
C O I L
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