York NM120-240 - Typical Simplified Field Wiring Diagram - ND120 thru 240 Evaporator with YD120 thru 240 Condenser; Typical Simplified Field Wiring Diagram - ND120 thru 240 Evaporator

505428-YTG-V-0417
Johnson Controls Unitary Products 119
Typical Simplified Field Wiring Diagram – ND120 thru 240 Evaporator with YD120 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.
Typical Simplified Field Wiring Diagram – ND120 thru 240 Evaporator
C S1 S2 G1 G2 66 60 X
C S1 S2 G1 G2 66 60 X
W1 W2 Y1 G Y2 0CC CX R SD-24
SE CONTROL BOARD
THERMOSTAT CONNECTIONS
TB2
TB2
CONDENSER CONTROL BOX
EVAPORATOR CONTROL BOX
THERMOSTAT
TWO STAGE COOL
TWO STAGE HEAT
R C Y1 Y2 G W1 W2
UNIT
POWER
SUPPLY