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255040-YTG-A-0506
Unitary Products Group 23
FIGURE 2 - TYPICAL FIELD POWER & CONTROL WIRING
REFERTOTHEELECTRICALDATA
TABLESTOSIZETHEDISCONNECT
SWITCH,OVERCURRENTPROTEC-
TIONANDWIRING.
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
2TH040702224 IF USED
NOT
USED
ADD
JUMPER
ADD
JUMPER
4
4
3
2
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.
4
REMOVE JUMPER J2 FROM TERMINALS 4 AND 9 ON JUMPER PLUG CONNECTOR
P6 ON UNITS WITH ECONOMIZER. TERMINALSA1 ANDA2 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 2ET07701024 (INCLUDES SUBBASE).
TO CONTROL THE ECONOMIZER ON SECOND STAGE COOLING, USE THERMOSTAT
2TH04700224.
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 VOLTTHERMOSTAT 2TH07701024. TO CONTROLTHE ECONOMIZER
ON SECOND STAGE COOLING, USE THE THERMOSTAT 2TH0401224.
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
24VOLT THERMOSTAT 2ET07701024.TO CONTROLTHE ECONOMIZER ON THE SECOND
STAGE COOLING OR TO HAVE AN ELECTRIC HEAT ACCESSORYWITH TWO STAGES OF
HEAT, USE THERMOSTAT 2TH0471024.
1
COOLING / HEATING (24 VOLT THERMOSTAT)
TYPICAL POWER WIRING
TYPICAL CONTROL WIRING