Table 9. Sequence of Operation for Heat Pump Systems.
System Setting
OFF
COOL
COOL or AUTO
COOL or AUTO
HEAT
HEAT or AUTO
HEAT or AUTO
HEAT or AUTO
Em. HEAT
Em. HEAT
Em. HEAT
a
Configure O/B in Installer Setup. Based on last piece of equipment called (cooling = O or
heating = B).
c
If Installer Setup System Type is set to 2Heat/1Cool Heat Pump with Auxiliary Heat.
d
If Installer Setup System Type is set to 3Heat/2Cool Heat Pump with Auxiliary Heat.
e
This terminal does not energize if Installer Setup System type is set to 2 Heat/2 Cool Heat
Pump with no Auxiliary Heat.
Fan Setting
Call for Action
AUTO
AUTO
AUTO
Stage 1 Cooling
Stage 1 and Stage 2
AUTO
AUTO
AUTO
Stage 1 Heating
Stage 1 and Stage 2
AUTO
Stage 1, 2 and 3
AUTO
AUTO
AUTO
Stage 1 Heating
Stage 1 and Stage 2
AUTO
CT2001 Touchscreen Programmable Thermostat
Energize Terminals
None
None
Y, G, O/B
Y, Y2
Cooling
None
Y, G, O/B
Y, AUX
Heating
Y, Y2
Heating
None
E, G, L, O/B
E, AUX, G, L, O/B
Heating
Screen Message
a
O/ B
a
O/ B
a
d
a
, G, O/B
a
O/B
a
c
a
, G, O/B
Aux Heat On
d
e
, AUX
, G,
Aux Heat On
a
O/B
a
L, O/B
a
a
Aux Heat On
None
None
Cool On
Cool On
None
Heat On
None
Heat On
89
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