Lennox International Inc installation instructions G24-200FIELD WIRING DIAGRAM

G24-200 FIELD WIRING DIAGRAM

		P UNITS − 208/230V 1PH 60 HZ				Three phase shown. L2 not used
		Y UNITS − 208/230V 3PH 60HZ
							in single phase applications
							FUSED OR CIRCUIT BREAKER
							DISCONNECT (Furnished by
	PRIMARY			PRIMARY			installer)
COMBUSTION		PRESSURE	COMBUSTION		PRESSURE		L1	L2	L3	GND
AIR BLOWER	LIMIT		AIR BLOWER	LIMIT
		SWITCH			SWITCH
	GAS	IGNITION	GAS	IGNITION
				CONTROL
	VALVE	CONTROL	VALVE
				BOARD
		BOARD
FLAME ROLLOUT			FLAME ROLLOUT
	SWITCH
			SWITCH

	BLOWER DECK
	RED	L1		1	2 3 4					RED
									L1
	RED				J84
		L2		DOOR			DOOR			RED
					PLUG				L2
	RED		INTERLOCK				INTERLOCK
		L3								RED
									L3
	MAKE−UP BOX		Three phase shown. L2 not used								(Alternate make−up
				in single phase applications						MAKE−UP BOX
	(Alternate make−up										box left side)
	box right side)
										R3	THERMOSTAT
										See Note 2
	TERMINAL STRIP
				REMOVE JUMPER IN
		TB34						C			C
				TWO-STAGE MODE
	SEE NOTE 1
		1						W1			W1
	5	1		GROUND
								G
RELAY		2		LUG							G
K109	7	2						W2
					K3 CONTACTOR						W2
				BLACK
		YELLOW						Y1
											Y1
		YELLOW
				RED
					L1	L2	L3
RELAY		BLUE						Y2			Y2
	7
K105				ORANGE
		BLUE
								R
	T1 TRANSFORMER										R
	24v: blue − yellow				T1	T2 T3
	208v: red − black										ECONOMIZER
	240v: orange − black
								ECON
											NOTES :

Three phase shown. This lead not used in single phase applications

TB1

TERMINAL STRIP

CONTROL BOX

BLOWER MOTOR

1 − Relay K109 can be used for an accessory rated at the same voltage as power sup- ply.

2 − Field installed and supplied re- sistor (R3), is required in two-stage applications when using electro- mechanical thermostat.

(Use a 150 ohm, 10 watt resistor − Lennox part number P−8−6256.)

FIELD-INSTALLED DRIVE KIT COMPONENT

FACTORY INSTALLED

LINE VOLTAGE FIELD INSTALLED 24 VOLTS FIELD INSTALLED

FIGURE 16

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