York XP048 - Typical Field Wiring Diagrams; Power Wiring Diagrams; Control Wiring Diagrams

251933-YTG-J-1009
94 Johnson Controls Unitary Products
Typical Field Power and Control Wiring
REFER TO THE ELECTRICAL DATA
TABLES TO SIZE THE DISCONNECT
SWITCH, OVERCURRENT PROTEC-
TION AND WIRING.
RC
RH
Y1
Y2
W1
W2
G
LED 1
LED 2
COM
A1
A2
T
T
B
R
Y1
Y2
G
C
X
OCC
W2
W1
THERMOSTAT
1
TERMINALS
UNIT TERMINAL
STRIP TB1
24 VOLT
TRANSFORMER
TO REMOTE SENSOR
IF USED
NOT
USED
ADD
JUMPER
ADD
JUMPER
4
4
3
2
1
ELECTRONIC PROGRAMMABLE THERMOSTAT TYPICAL.
2
SECOND STAGE COOLING IS NOT REQUIRED ON UNITS LESS ECONOMIZER.
3
SECOND STAGE HEATING IS ONLY REQUIRED ON UNITS WITH A TWO STAGE
ELECTRIC HEATER OR 2 STAGE GAS HEAT.
4
REMOVE JUMPER J2 FROM TERMINALS 4 AND 9 ON JUMPER PLUG CONNECTOR
P6 ON UNITS WITH ECONOMIZER. TERMINALS A1 AND A2 PROVIDE A RELAY
OUT-PUT TO CLOSE THE OUTDOOR ECONOMIZER DAMPERS WHEN THE
THERMOSTAT SWITCHES TO THE SET-BACK POSITION.
COOLING / HEATING (ELECTRONIC THERMOSTAT)
MULTI STAGE
RH
RC
Y
W
G
R
Y1
W1
C
G
ADD
JUMPER
THERMOSTAT
1
TERMINALS
UNIT TERMINAL
STRIP TB1
24 VOLT
TRANSFORMER
1
ELECTRONIC PROGRAMMABLE THERMOSTAT TYPICAL. TO CONTROL THE
ECONOMIZER ON SECOND STAGE COOLING, USE A 2 STAGE COOL AND
HEAT THERMOSTAT.
COOLING / HEATING (ELECTRONIC THERMOSTAT)
SINGLE STAGE
RV
YC
GF
R
Y1
C
Y2
THERMOSTAT
1
TERMINALS
UNIT TERMINAL
STRIP TB1
24 VOLT
TRANSFORMER
1
24 VOLT THERMOSTAT. TO CONTROL THE ECONOMIZER ON SECOND
STAGE COOLING, USE A 2 STAGE COOLING THERMOSTAT.
G
COOLING ONLY (24 VOLT THERMOSTAT)
RC
Y
R
Y1
Y2
W1
W
W2
G
C
G
RH
THERMOSTAT
TERMINALS
UNIT TERMINAL
STRIP TB1
24 VOLT
TRANSFORMER
ADD
JUMPER
1
24 VOLT THERMOSTAT. TO CONTROL THE ECONOMIZER ON THE SECOND
STAGE COOLING OR TO HAVE AN ELECTRIC HEAT ACCESSORY WITH TWO
STAGES OF HEAT, USE A 2 STAGE COOL AND HEAT THERMOSTAT.
1
COOLING / HEATING (24 VOLT THERMOSTAT)
TYPICAL POWER WIRING
TYPICAL COOL/HEAT CONTROL WIRING