ControlTemp CT2001 - Sequence of Operation for Heat Pump Systems

CT2001 Touchscreen Programmable Thermostat
Table 9. Sequence of Operation for Heat Pump Systems.
89
System Setting
Fan Setting
Call for Action
Energize Terminals
Screen Message
OFF
AUTO
None
O/ B
a
None
COOL
AUTO
None
O/ B
a
None
COOL or AUTO
AUTO
Stage 1 Cooling
Y, G, O/B
a
Cool On
COOL or AUTO
AUTO
Stage 1 and Stage 2
Cooling
Y, Y2
d
, G, O/B
a
Cool On
HEAT
AUTO
None
O/B
a
None
HEAT or AUTO
AUTO
Stage 1 Heating
Y, G, O/B
a
Heat On
HEAT or AUTO
AUTO
Stage 1 and Stage 2
Heating
Y, AUX
c
, G, O/B
a
Aux Heat On
HEAT or AUTO
AUTO
Stage 1, 2 and 3
Heating
Y, Y2
d
, AUX
e
, G,
O/B
a
Aux Heat On
Em. HEAT
AUTO
None
L, O/B
a
None
Em. HEAT
AUTO
Stage 1 Heating
E, G, L, O/B
a
Heat On
Em. HEAT
AUTO
Stage 1 and Stage 2
Heating
E, AUX, G, L, O/B
a
Aux Heat On
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.