508151-01
Issue 2104
Page 72 of 72
CALL FOR FAN
CALL FOR FAN
REMOVED?
YES
NO
NO
REQUEST
FOR HEAT
RECEIVED?
REQUEST
FOR COOLING
RECEIVED?
GO TO CALL FOR 1ST STAGE HEAT
YES
GO TO CALL FOR COOLING
1
1
1
4
YES
NO
CALL FOR FAN
INDOOR BLOWER ON
CONTINUOUS FAN
SPEED
MAINTAIN INDOOR
BLOWER AT
CONTINUOUS FAN
MAINTAIN INDOOR
BLOWER AT
CONTINUOUS FAN
DE-ENERGIZE INDOOR
BLOWER
MAINTAIN INDOOR
BLOWER AT
CONTINUOUS FAN
1
1 - If continuous fan is active, unit will light and run at high fire
for 60 seconds to improve heat exchanger warm up.
Troubleshooting: Continuous Fan Sequence of Operation