Important
At the first DHW release of the day, forced charging is performed.
The DHW charging is also started if the DHW temperature is
within the switching difference – as long as it is not less than 1 K
under the setpoint.
Charging time limitation (5030)
During the domestic water charging, the room heating – depending on the
selected charging priority (program no. 1630) and the hydraulic circuit –
has too little or no power. It is therefore often practical to restrict the time
of domestic water charging. After the set time has elapsed, domestic water
charging is stopped and locked for the same amount of time before it is
resumed.
Discharging protection (5040)
This function ensures that the DHW circulation pump (Q3) only switches
on when the temperature in the heat source is high enough.
Application with sensor
The charging pump is only switched on when the heat source
temperature is above the DHW temperature plus half of the heating
excess. If the boiler temperature drops below the DHW temperature
plus 1/8 of the charging excess during the charging again, the
charging pump is switched off again. If two DHW sensors for the DHW
charging are parameterized, the lower temperature is considered for
the discharge safety function (normally the DHW sensor B31).
Application with thermostat
The primary pump is only switched on if the boiler temperature is
above the set DHW temperature. If the boiler temperature drops
below the DHW nominal setpoint minus the DHW switching difference,
charging pump is switched off again.
Off: The function is switched off.
Always: The function is always active.
Automatically: The function is only active if the heat generator cannot
deliver heat or is not available (malfunction, generator lock).
Discharg protec after charg (5042)
If the parameter is at "On", the discharge protection stops the domestic
water pumps Q3 and Q33 from running on as soon as the DHW charging
temperature drops below the storage tank temperature B3.
Charging temp max (5050)
With this setting, the maximum charging temperature for the connected
storage of the solar system is limited. If the DHW-charging value is
exceeded, the collector pump switches off.
Important
The collector pump can be re-activated by the collector
overheating protection function (see programme no. 3850) until
the storage tank safety temperature (90 °C) has been reached.
Recooling temp (5055)
Once a recooling function has been activated, it remains in operation until
the set Recooling temp in the domestic water storage tank has been
reached.
Recooling collector (5057)
Recooling of the overhaeted collector through giving off of the energie to
the surrounding of the collector.
El imm heater optg mode (5060)
Substitute: The DHW is only heated by an immersion heater if the boiler
signals a malfunction or a boiler lock exists.
9 Settings
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