Lennox International Inc G32Q3-100 Lwostageooei S,N L S %T, Normalheatingmodeabnormalheatingmode

HEATINGSEQUENCECONTINUED

NORMALHEATINGMODEABNORMALHEATINGMODE

IPREPURGE

IPRESSURESWtTCHCLOSED?

GAS VALVE DE-ENERGIZED.

!11INDOOR BLOWER DE-ENERGIZED,(Seetop of previous page.)

L'WO'STAGE'OOEI S,N";L;'S_;_%T

COMBUSTION AIR INDUCER ON FOR 2.5 MINUTES,

	CALLFOR 2ridSTAGE		2ridSTAGEON DELAY
	HEAT(HIGHHEAT)		ON CONTROLBOARD
	FROM THERMOSTAT	COMPLETE (B, 12 OR 15 MIN
I	INDOOR BLOWER ON
	HIGH HEATING SPEED?
		1		2.5
				MINUTES
I COMBUSTION AIR BLOWER ON HIGH SPEED?
I	HIGH HEAT PRESSURE		SWITCH CLOSED?	I
	YES	_
I	HIGH HEAT GAS VALVE OPEN? (8 SEC. DELAY)			_'NO

CONTROL CHECKS: FLAME PRESENCE, CLOSED I PRIMARY LIMIT, CLOSED PRESSURE SWITCHES, r

CONTINUOUSLY CLOSED ROLl.OUT SWITCH (dudng heating cycle).

SEE PREVIOUS SEQUENCES FOR FAILURE MODES.

DEMAND FOR HEAT SATISFIED.	I
THERMOSTAT OPENS.

GAS VALVE DE-ENERGIZED.		]
COMBUSTION	AIR BLOWER	I
POST-PURGE	- 5 SECONDS.
INDOOR BLOWER		J
SELECTED TIME OFF DELAY.

PRESSURESW,TC c

:_ _o

PRESSURE SWITCH WATCHGUARD

COMBUSTION AIR INDUCER

DE-ENERGIZED.

5-MINUTE DELAY

COMBUSTIONiNDUCER ONAIR. I

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