Typical Field Power & Control Wiring - York BQ 036 Technical Manual

COOLING / HEATING (ELECTRONIC THERMOSTAT)
MULTI STAGE
1
THERMOSTAT
TERMINALS
RC
ADD
RH
JUMPER
Y1
Y2
W1
4
W2
G
B
LED 1
NOT
LED 2
USED
COM
A1
ADD
JUMPER
A2
T
T
1 ELECTRONIC PROGRAMMABLE THERMOSTAT 2ET04700224 (INCLUDES SUBBASE).
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.
REMOVE JUMPER J2 FROM TERMINALS 4 AND 9 ON JUMPER PLUG CONNECTOR
4
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.
FIGURE 2 - TYPICAL FIELD POWER & CONTROL WIRING
34
TYPICAL POWER WIRING
REFER TO THE ELECTRICAL DATA
TABLES TO SIZE THE DISCONNECT
SWITCH, OVERCURRENT PROTEC-
TION AND WIRING.
TYPICAL CONTROL WIRING
COOLING / HEATING (24 VOLT THERMOSTAT)
THERMOSTAT
TERMINALS
RH
ADD
JUMPER
RC
Y
W
G
1
24 VOLT THERMOSTAT 2ET07701024. TO CONTROL THE ECONOMIZER ON THE SECOND
STAGE COOLING OR TO HAVE AN ELECTRIC HEAT ACCESSORY WITH TWO STAGES OF
HEAT, USE THERMOSTAT 2TH0471024.
UNIT TERMINAL
STRIP TB1
24 VOLT
TRANSFORMER
R
Y1
2
Y2
W1
3
W2
G
C
X
OCC
4
TO REMOTE SENSOR
2TH040702224 IF USED
1
UNIT TERMINAL
STRIP TB1
R
Y1
24 VOLT
TRANSFORMER
Y2
W1
W2
G
C
COOLING / HEATING (ELECTRONIC THERMOSTAT)
THERMOSTAT
TERMINALS
RH
RC
ADD
Y
JUMPER
W
G
1
ELECTRONIC PROGRAMMABLE THERMOSTAT 2ET07701024 (INCLUDES SUBBASE).
TO CONTROL THE ECONOMIZER ON SECOND STAGE COOLING, USE THERMOSTAT
2TH04700224.
036-21508-005-A-0305
SINGLE STAGE
1
UNIT TERMINAL
STRIP TB1
R
Y1
W1
G
C
24 VOLT
TRANSFORMER
Unitary Products Group