en
30
7.3
Solar expert menu
overloading protection
The Overloading protection is used for protecting a
store which is not supposed to be loaded from being
overheated in the case of a blocked 3-port valve.
When the overloading protection function is activat-
ed and the first store is being loaded, monitoring of
the second store starts. When, during the loading of
the first store, the temperature of the second store
exceeds the adjusted Emergency temperature, over-
loading protection will become active. Both the solar
and the secondary pump will be switched off. The er-
ror message "Check 3-port valve!" will be indicated in
the Status / Messages menu.
If the temperature of the second store falls by 5 K
below the emergency temperature, both the solar and
the secondary pump will be switched on.
If the SFB Off option is activated and the solid fuel
boiler relay is switched on, the overloading protection
will become inactive.
Adjustment channel
Description
Adjustment range / selection
Factory setting
Overload. protection
Overloading protection
Yes, No
Yes
Emergency temperature Emergency temperature
60 … 95 °C
90 °C
SFB Off
Solid fuel boiler off
Yes, No
No
Solar / Expert / overload. protection
Note:
This function is available in systems 3 and
6 only.
Note:
When this function is activated, the maxi-
mum store temperature cannot be adjusted
to a value higher than 90 °C.
The Expert menu is only available when the expert
user code has been entered. In the expert menu, a
flow and a return sensor can be selected and allocat-
ed. The allocated sensors are then used to detect the
switch-off condition.
Note:
Because of the special hydraulics, this func-
tion will not work properly in systems with
2 collector fields.
Example of flow and return sensor positions
Solar / Expert
Adjustment channel
Description
Adjustment range / selection
Factory setting
Flow sensor
Flow sensor option
Yes, No
No
Sensor
Flow sensor selection
system dependent
-
Return sensor
Return sensor option
Yes, No
No
Sensor
Return sensor selection
system dependent
-
Flow
sensor,
S2
Return sensor
S3
S4
S6
R2
R4
VFD
S5
R1
S1
Col
St top
St base
St centre
