Recooling heat gen/HC
Electric immersion heater
Siemens Schweiz AG
The protective collector overtemperature function can reactivate the collector pump
until the maximum storage tank temperature is reached.
For recooling the DHW storage tank, there are 2 functions available:
• Heating energy can be drawn off either by space heating or the DHW storage tank.
This can be selected separately for each heating circuit (operating page "Heating
• If the collector is cold, the energy can be emitted to the environment via the
El imm heater optg mode
El immersion heater release
Time program 4 / DHW
El immersion heater control
External control thermostat
The electric immersion heater is only used if the boiler delivers a fault status message
or if it has been shut down via boiler lock. This means that in normal situations the
DHW is heated by the boiler.
The electric immersion heater is used as soon as all connected heating circuits have
switched to summer operation. The DHW is again heated by the boiler as soon as at
least one of the heating circuits has switched back to heating mode. But the electric
immersion heater is also used if the boiler delivers a fault status message or has been
shut down via boiler lock.
DHW is heated with the electric immersion heater throughout the year. This means that
with this application, the boiler is never required for DHW heating.
The electric immersion heater is always released, independent of time programs.
The settings in detail
22. November 2006