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SEQUENCE OF OPERATION
Table 1: Sequence of operation
Mode
Thermostat to Control
Board 24 VAC
Control
Control Function
Electric Heat only
Continous Fan
G
ON
Fan ON at the selected continous fan CFM
(Fan switch ON)
OFF
Fan OFF
Thermostat calls for 1st stage Heat
W1
▼
ON
Fan ON at 50% of the selected Heat CFM, 1st stage of Heat ON**
OFF
1st stage of Heat OFF, Fan OFF
Thermostat calls for 2nd stage Heat
W1 & W2
▼
ON
Fan ON at selected Heat CFM, 1st stage & 2nd stage of Heat ON**
OFF
1er & 2eme stage du chauffage OFF, Ventilateur OFF
Cooling 1 stage, with Electric Heat
Continous Fan
G
ON
Fan ON at the selected continous fan CFM
(Fan switch ON)
OFF
Fan OFF
Thermostat calls for 1st stage Heat
W1
▼
ON
Fan ON at 50% of the selected Heat CFM, 1st stage of Heat ON**
OFF
1st stage of Heat OFF, Fan OFF
Thermostat calls for 2nd stage Heat
W1 & W2
▼
ON
Fan ON at selected Heat CFM, 1st stage & 2nd stage of Heat ON**
OFF
1st stage & 2nd stage of Heat OFF, Fan OFF
Thermostat calls for Cooling
Y/Y2 & G
ON
Compressor ON, Fan ON after delays at selected Cooling CFM
OFF
Compressor OFF, Fan OFF after selected cooling delays
Thermostat calls for Cooling &
Dehumidification
Y/Y2 & G & (DH)*
ON
Compressor ON, Fan ON after delays at 80% of the selected Cooling
CFM
OFF
Compressor OFF, Fan OFF after selected cooling delays
Cooling 2 stages, with Electric Heat
Continous Fan
G
ON
Fan ON at the selected continous fan CFM
(Fan switch ON)
OFF
Fan OFF
Thermostat calls for 1st stage Heat
W1
▼
ON
Fan ON at 50% of the selected Heat CFM, 1st stage of Heat ON**
OFF
1st stage of Heat OFF, Fan OFF
Thermostat calls for 2nd stage Heat
W1 & W2
▼
ON
Fan ON at selected Heat CFM, 1st stage & 2nd stage of Heat ON**
OFF
1st stage & 2nd stage of Heat OFF, Fan OFF
Thermostat calls for 1st stage Cooling
Y1 & G
ON
Compressor ON, Fan ON after delays at 80% of the selected Cooling
CFM
OFF
Compressor OFF, Fan OFF after selected cooling delays
Thermostat calls for 2nd stage Cooling
Y/Y2 & Y1 & G
ON
Compressor ON, Fan ON after delays at selected Cooling CFM
OFF
Compressor OFF, Fan OFF after selected cooling delays
Thermostat calls for 2nd stage Cooling
& Dehumidification
Y/Y2 & Y1 & G & (DH)*
ON
Fan ON at selected Heat CFM, 1st stage & 2nd stage of Heat ON**
OFF
1st stage & 2nd stage of Heat OFF, Fan OFF
Heat pump 1 stage, with Electric Heat
Continous Fan
G
ON
Fan ON at the selected continous fan CFM
(Fan switch ON)
OFF
Fan OFF
Thermostat calls for Cooling
Y/Y2 & G & O
ON
Compressor ON, Fan ON after delays at selected Cooling CFM
OFF
Compressor OFF, Fan OFF after selected Cooling delays
Thermostat calls for Cooling &
Dehumidification
Y/Y2 & G & O & (DH)*
ON
Compressor ON, Fan ON after delays at 80% of the selected Cooling
CFM
OFF
Compresseur OFF, Ventilateur OFF après les délais sélectionnés
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