ESIE13-02
Functionality
29
Part 1 – System Outline
3
1
4
5
0
25°C
15°C
18°C
1
0
1
Time
DURING DEFROST
boiler operation
return
temp.
inlet
temp.
heatpump operation (defrosting)
hysteresis of ~ 10°C
Return temperature below 18°C
0
0
1
1
Time
NOT DURING DEFROST : start up of heatpump mode, return <15°C
heatpump operation
boiler operation (*)
15°C
18°C
0
1
0
1
Time
NOT DURING DEFROST : heatpump mode, return <15°C
heatpump
boiler
