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	TWINNING CONNECTION DIAGRAM
	FOR TWINNING 1 STAGE FURNACES WITH
	SINGLE WIRE TWINNING FEATURE
1 STAGE HEAT	1 STAGE HEATING ONLY THERMOSTAT
ONLY
THERMOSTAT
(WITH FAN SWITCH)	FURNACE NO. 1	FURNACE NO. 2
		BLOWER OPERATION OF
		UNIT NO. 2 IS SYNCRONIZED
		WITH UNIT NO. 1 VIA SIGNALS
		FROM TWIN CONNECTION.
	TWIN	TWIN
		SEE NOTE 4
	ISOLATION RELAY
	(FIELD SUPPLIED)
	SEE NOTE 4
	R1	R1
		ISOLATION RELAY
		SEE NOTE 4
B/C	SEE NOTE 3	B/C
	B/C
		From Dwg. 21B341422 Rev. 3

			TWINNING CONNECTION DIAGRAM
		FOR TWINNING 1 STAGE FURNACES WITH
			SINGLE WIRE TWINNING FEATURE
	1 STAGE	1 STAGE HEAT / 1 STAGE COOL THERMOSTAT
OUTDOOR UNIT
	HEATING / COOLING
(WITH TRANSFORMER)
	THERMOSTAT		FURNACE NO. 1	FURNACE NO. 2
				BLOWER OPERATION OF
				UNIT NO. 2 IS SYNCRONIZED
				WITH UNIT NO. 1 VIA SIGNALS
				FROM TWIN CONNECTION.
			TWIN	TWIN
RC
ISOLATION RELAY
(FIELD SUPPLIED)
SEE NOTE 3
				SEE NOTE 4
OUTDOOR UNIT
(NO TRANSFORMER)
					R1
					ISOLATION RELAY
					SEE NOTE 4
		SEE NOTE 5	B/C	R1
	B/C			B/C
				ISOLATION RELAY
				(FIELD SUPPLIED)
				SEE NOTE 4	From Dwg. 21B341423 Rev. 2