EQJW146F002 EN
101
Functions of the DHW circuit
7.4 Domestic hot water heating with solar system
The systems Anl 1.3 and 2.3 are fitted with a solar system for DHW heating. In these sys-
tems, the difference between the temperatures measured at storage sensor SF2 and the sen-
sor at the solar collector VF3 is determined. The 'Solar circuit pump ON' parameter deter-
mines the minimum temperature difference between sensors VF3 and SF2 required to acti-
vate the solar circuit pump. If the temperature difference falls below the value of 'Solar circuit
pump OFF', the solar circuit pump is switched off. Basically, the solar circuit pump is also
switched off when either the water temperature measured at sensor SF2 has reached the
'Max. storage tank temperature' or when the solar collector temperature rises above 120 °C.
The times-of-use of the DHW circuit do not affect the operation of the solar system.
After the key number 1999 has been entered, the operating hours of the solar circuit pump
are displayed in the extended operating level. See page 13.
Parameters
WE
Parameters: value range
Solar circuit pump ON
10.0 °C
PA4 > P10: 1.0 to 30.0 °C
Solar circuit pump OFF
3.0 °C
PA4 > P11: 0.0 to 30.0 °C
Max. storage tank temperature
80.0 °C
PA4 > P12: 20.0 to 90.0 °C
7.5 Intermediate heating
This function can only be activated in systems Anl 2.x, 4.1 and 4.5.
With the setting CO4 > F07 - 1, heating operation of the UP1 heating circuit is reactivated
for a period of 10 minutes after 20 minutes of priority operation (heating deactivated during
DHW heating). By setting CO4 > F07 - 0, storage tank charging is given unlimited priority
over the heating operation in the UP1 heating circuit.
Functions
WE
Configuration
Intermediate heating
1
CO4 > F07 - 1
Note
