1. Empfohlen wird auf dem Titel der Einsatz eines vollflächigen Hintergrundbildes (Format: 25,4 x 19,05 cm): Bild auf Master platzieren (JPG, RGB, 144dpi) Bild in den Hintergrund legen Empfohlen wird auf dem Titel der Einsatz eines vollflächigen Hintergrundbildes (Format: 25,4 x 19,05 cm): Bild auf Master platzieren (JPG, RGB, 144dpi) Bild in den Hintergrund legen Confidential / Copyright © Siemens Schweiz AG 2006 Buffer Storage Tank OEM Boiler & Burner Equipment

2. Seite 2 Nov 2006 Confidential / Copyright © Siemens Schweiz AG 2006 Building Technologies / HVAC Products3134 Automatic heat generation lock The heat sources will be put into operation only if the buffer storage tank is no longer able to satisfy the current demand for heat RVS - Buffer Storage Tank OFF B4 > heat demand

3. Seite 3 Nov 2006 Confidential / Copyright © Siemens Schweiz AG 2006 Building Technologies / HVAC Products3134 Temperature difference buffer/heating circuit -> Adjustable Min storage tank temperature in heat mode Below this level, the heating circuits will be shut down RVS - Buffer Storage Tank Functions

4. Seite 4 Nov 2006 Confidential / Copyright © Siemens Schweiz AG 2006 Building Technologies / HVAC Products3134 Charging temperature max Max temperature the buffer is charged by solar or solid fuel boiler. The protective collector overtemperature function can reactivate the collector pump until the maximum buffer st. tank temperature is reached. RVS - Buffer storage tank Functions Recooling via DHW / heating circuit Heating energy can be drawn off by the DHW tank / space heating / Hx pump. It can be selected separately for each heating circuit. Recooling via collector If the collector is cold, energy can be emitted to the environment via the collectors surfaces. Recooling temperture The recooling is active until the buffer has reached this temperature

5. Seite 5 Nov 2006 Confidential / Copyright © Siemens Schweiz AG 2006 Building Technologies / HVAC Products3134 RVS - Buffer Storage Tank Functions Diversion of return Delta T between B73 and B4/41/42 To cool down the return To warm up the return Partial charge of buffer storage tank Delta T between a parameter value and B4/42

6. Seite 6 Nov 2006 Confidential / Copyright © Siemens Schweiz AG 2006 Building Technologies / HVAC Products3134 RVS - Buffer Storage Tank Functions Heat transfer buffer to DHW storage tank Delta T function between buffer sensor B4 and B3/B31 The transfer is stopped, if the buffer storage tank reaches the slave pointer temperature

7. Seite 7 Nov 2006 Confidential / Copyright © Siemens Schweiz AG 2006 Building Technologies / HVAC Products3134 RVS - Buffer Storage Tank Functions Principle of slave pointer -> buffer storage tank setpoint Generation of maximum value of heat demand signals( red line). At midnight, the setpoint (slave pointer) is reduced by 5% of the value