PS4000/PS5000 Touchscreen Programmable Thermostat
Table 9. Sequence of Operation for Heat Pump Systems.
91
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 Set-up (cooling = O or heating = B).
c
If Installer Set-up System Type is set to 2 Heat/1 Cool Heat Pump with Auxiliary Heat.
d
If Installer Set-up System Type is set to 3 Heat/2 Cool Heat Pump with Auxiliary Heat.
e
This terminal does not energize if Installer Set-up System type is set to 2 Heat/2 Cool Heat
Pump with no Auxiliary Heat.
*PS5000 Only.
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