York 20 Series - Electrical, Gas, and Control Systems; Power and Control Wiring

349215-JIM-B-1008
12 Johnson Controls Unitary Products
FIGURE 5 - TYPICAL FIELD WIRING
W2
RC
RH
Y1
Y2
W1
G
C
X1
X3
X4
A1
A2
T
T
W2
Y1
Y2
W1
G
C
OCC
X
R
THERMOSTAT
1
TERMINALS
UNIT CONTROL
BOARD
1
ElectronicprogrammableThermostat2ET0770010024(includessubbase).
2

TerminalsA1andA2providearelayoutput toclosetheoutdoor
economizerdamperswhenthethermostatswitchestotheset-backposition

.
24Volt
Transformer
2
TOREMOTESENSOR
2ET04701324IFUSED

OCC
W1
W2
Y1
G
Y2
X
R
SD
C
REMOTE MIN POS
W1
W2
Y1
G
Y2
C
UNIT CONTROL
BOARD
T-STAT
RH
RC
  







  
 
208/230-3-60 and 380/415-3-50 units control
transformers are factory wired for 230v and 415v
power supply respectively. Change tap on
transformer for 208-3-60 or 380-3-50 operation.
See unit wiring diagram.