Thermo Pride Gas/Propane Furnace Premiere Series 2-Stage CHX3 - Manual (Page 43)

All installations and services must be performed by qualified service personnel.
37
IF SYSTEM IS IN LOCKOUT,
THE MODULE WILL RESET
ITSELF AFTER 60 MINUTES
OR MAY BE MANUALLY
RESET BY INTERRUPTING
THE POWER TO THE FURNACE
AT THE DISCONNECT OR
INTERRUPTING THE CALL FOR
HEAT AT THE THERMOSTAT.
IF THIS DOES NOT RESTART
THE SYSTEM, REFER TO THE
TROUBLESHOOTING SECTION
OF THIS MANUAL.
AFTER THE DELAY-TO-FAN-OFF
PERIOD ENDS, THE CIRCULATING
AIR FAN AND (OPTIONAL) ELECTRONIC
AIR CLEANER ARE DE-ENERGIZED.
AFTER DELAY-TO-FAN-ON PERIOD
ENDS (45 SECONDS), CIRCULATING
AIR FAN IS ENERGIZED AT LOW
FIRE HEATING SPEED OR HIGH
FIRE IF W2 IS ENERGIZED. THE
(OPTIONAL) ELECTRONIC AIR
CLEANER AND HUMIDIFIER
ARE ENERGIZED.
IF THERMOSTAT
W2 CONTACTS
ARE CLOSED
OTHERWISE
CALL
FOR
HIGH
FIRE
NO CALL
FOR
HIGH FIRE
THERMOSTAT CLOSES W2
CALLING FOR HIGH FIRE
HEATING.
GAS VALVE, INDUCER AND
AIR FAN ARE ENERGIZED
TO HIGH FIRE SETTINGS
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)
WHEN THERMOSTAT HAS
SATISFIED W2, CONTACTS
OPEN AND THE GAS VALVE
AND AIR FAN HIGH FIRE
SETTINGS ARE DE-ENERGIZED
AFTER 30 SECOND DELAY.