York R-410A Technical Manual page 126

505428-YTG-V-0417
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 – NL120 thru 240 Evaporator with YC120 thru 240 Condenser
NOTE: On non NL/NM Evaporator models, isolation relays
must be installed to avoid overloading on 75 VA
transformers on the condensing unit.
VALVE SYS 2
1LLS
Typical NL120 - 240 Liquid Line Solenoid Wiring
126
CONDENSER CONTROL BOX
UCB
VFD COMM
VFD
TB
VLT
3-1
1
2
3
4
TB5
218 / BR
BLK
BLK 219 / Y
SE CONTROL BOARD
THERMOSTAT CONNECTIONS
W1 W2 Y1 G Y2 0CC
VFD C
R C
TWO STAGE COOL/FAN
TWO STAGE HEAT
X R SD-24
Y1 Y2 G W1
THERMOSTAT
Johnson Controls Unitary Products
C
W2