Thermo Products CHX1-125N, CDX1-75N, CHX1-75N, CHX1-100N, CDX1-125N If System Is In Lockout

All installations and services must be performed by qualified service personnel.

		IF SYSTEM IS IN LOCKOUT,
		THE MODULE WILL RESET
IF THERMOSTAT		ITSELF AFTER 60 MINUTES
		OR MAY BE MANUALLY
W2 CONTACTS
		RESET BY INTERRUPTING
ARE CLOSED
		THE POWER TO THE FURNACE
		AT THE DISCONNECT OR
		INTERRUPTING THE CALL FOR
		HEAT AT THE THERMOSTAT.
		IF THIS DOES NOT RESTART
OTHERWISE		THE SYSTEM, REFER TO THE
		TROUBLESHOOTING SECTION
		OF THIS MANUAL.
AFTER DELAY-TO-FAN-ON PERIOD
ENDS (45 SECONDS), CIRCULATING
AIR FAN IS ENERGIZED AT LOW		THERMOSTAT CLOSES W2
FIRE HEATING SPEED OR HIGH
		CALLING FOR HIGH FIRE
FIRE IF W2 IS ENERGIZED. THE	CALL
		HEATING.
(OPTIONAL) ELECTRONIC AIR	FOR
CLEANER AND HUMIDIFIER	HIGH
ARE ENERGIZED.	FIRE
		GAS VALVE, INDUCER AND
		AIR FAN ARE ENERGIZED
		TO HIGH FIRE SETTINGS
NO CALL
FOR		WHEN THERMOSTAT HAS
HIGH FIRE		SATISFIED W2, CONTACTS
		OPEN AND THE GAS VALVE
		AND AIR FAN HIGH FIRE
		SETTINGS ARE DE-ENERGIZED
		AFTER 30 SECOND DELAY.
WHEN THERMOSTAT W1 IS SATISFIED,
CONTACTS OPEN AND THE GAS
VALVE IS DE-ENERGIZED. AFTER
PROOF OF FLAME LOSS, INDUCER
STARTS 5 SECOND POST PURGE
AND (OPTIONAL) HUMIDIFIER IS
DE-ENERGIZED. THE DELAY-TO-
FAN-OFF PERIOD BEGINS (120 SECONDS)
AFTER THE DELAY-TO-FAN-OFF
PERIOD ENDS, THE CIRCULATING
AIR FAN AND (OPTIONAL) ELECTRONIC
AIR CLEANER ARE DE-ENERGIZED.

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