York 048 & 060 Typical Power Wiring, Typical Control Wiring, Typical Field Power & Control Wiring

177820-YIM-A-0506

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)

THERMOSTAT1

TERMINALS

		UNIT TERMINAL
	RH	STRIP TB1
ADD
JUMPER	RC	R
	Y	Y1	24 VOLT
			TRANSFORMER
		Y2

WW1

W2

GG

C

124 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.

COOLING / HEATING (ELECTRONIC THERMOSTAT)

MULTI STAGE

	THERMOSTAT1					COOLING / HEATING (ELECTRONIC THERMOSTAT)
	TERMINALS				UNIT TERMINAL
ADD		RC			STRIP TB1	24 VOLT		SINGLE STAGE
		RH			R	TRANSFORMER
JUMPER
		Y1			Y1		THERMOSTAT1
		Y2		2	Y2		TERMINALS	UNIT TERMINAL
		W1			W1			STRIP TB1
	4	W2		3	W2		RH
		G			G		RC	R
		B			C	ADD	Y	Y1
						JUMPER
		LED 1			X		W	W1
		LED 2	NOT		OCC		G	G
			USED
		COM		4				C
		A1
ADD								24 VOLT
JUMPER		A2
		T		TO REMOTE SENSOR				TRANSFORMER

T 2TH040702224 IF USED

		1ELECTRONIC PROGRAMMABLE THERMOSTAT 2ET07701024 (INCLUDES SUBBASE).
1	ELECTRONIC PROGRAMMABLE THERMOSTAT 2ET04700224 (INCLUDES SUBBASE).	TO CONTROL THE ECONOMIZER ON SECOND STAGE COOLING, USE THERMOSTAT
2	SECOND STAGE COOLING IS NOT REQUIRED ON UNITS LESS ECONOMIZER.	2TH04700224.

3SECOND STAGE HEATING IS ONLY REQUIRED ON UNITS WITH A TWO STAGE ELECTRIC HEATER.

4REMOVE 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.

FIGURE 3 - TYPICAL FIELD POWER & CONTROL WIRING

Unitary Products Group 9