EbV Product documentation THETA NORM/UNIT
8-40
8.3.3 Electrical Heating Element (ELH)
Function: The function controls indirectly (via circuit breaker) an electrical water heater if the
automatic summer switch-off is active.
An external DHW thermostat including the necessary safety installation will take care
of the switch off function.
8.4 Solar function (..VV..)
Note: This function is only active if a variable output is assigned to a solar loading pump.
Two separate sensor inputs are available for this function:
• SPFS for the solar panel flow temperature and
• SPBU for the solar buffer tank
For heat metering a variable input (VI1..VI3) can be assigned for the solar panel
return sensor SPRS.
If the solar panel flow sensor is defect, the loading pump wiil be switched off.
Function: The solar function makes it possible to combine solar panels with heating and DHW
systems in order to support the economy of the system. The Solar loading pump can
be controlled according to various conditions.
Switch-on differential: Solar switch-on differential (SD
ON)
With sufficient solar heat energy the temperature difference between panel flow and
solar buffer tank will become bigger than the adjusted value and the solar panel
pump is switched on to load the buffer tank. The minimum value is 3K above the
switch off differential.
Operation:
Note on operation Key / parameter tree Parameter
Activation electrical heating element HYDRAULIC PARAMETER 02
or
PARAMETER 05
or
PARAMETER 06
or
PARAMETER 07
Operation: Activation of the function and sensor assignment:
Note on operation Key / parameter tree Parameter
Activation solar charging pump HYDRAULIC PARAMETER 05
or
PARAMETER 06
or
PARAMETER 07
Solar panel return sensor HYDRAULIC PARAMETER 08
or
PARAMETER 09
or
PARAMETER 10
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