York R-410A Technical Manual page 115

TB2
C S1 S2 G1 G2 66 60 X
C S1 S2 G1 G2 66 60 X
TB2
EVAPORATOR CONTROL BOX
Typical Simplified Field Wiring Diagram – NC120 thru 240 Evaporator with YC120 thru 240 Condenser
NOTE: On non NC/ND Evaporator models, isolation relays
must be installed to avoid overloading on 75 VA
transformers on the condensing unit.
VALVE SYS 2
1LLS
Typical NC120 - 240 Liquid Line Solenoid Wiring
Johnson Controls Unitary Products
CONDENSER CONTROL BOX
218 / BR
BLK
BLK 219 / Y
SE CONTROL BOARD
THERMOSTAT CONNECTIONS
W1 W2 Y1 G Y2 0CC
R C Y1 Y2
THERMOSTAT
TWO STAGE COOL
TWO STAGE HEAT
505428-YTG-V-0417
X R SD-24 C
G W1 W2
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