Cascade OEM Boiler Burner Equipment Empfohlen wird auf

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

RVS – Cascade functions Hydraulic circuit - d. h. w. charging pump Ÿ Up to 16 heat generators can be cascaded Ÿ Only parallel cascades can be controlled Ÿ One RVS controller for every heat generator Seite 2 July 2006 Marco Serafini Confidential / Copyright © Siemens Schweiz AG 2006 Building Technologies / HVAC Products

RVS – Cascade functions DHW charging pump Separate DHW heating circuit Seite 3 July

RVS – Cascade Functions Auxiliary functions Cascade return sensor Common cascade pump Common Min. boiler return temp. with mixing valve Seite 4 July 2006 Marco Serafini Confidential / Copyright © Siemens Schweiz AG 2006 Building Technologies / HVAC Products

RVS – Cascade functions Basic diagram Boiler stage and release manager - Casc. management strategy - Lower/upper limit output range - Release and reset integral - Switch-on delay boilers Boiler setpoint shift Equalizing of operating hours - Autom. Change of boiler sequence - Exclusion Cascade control - Consumer demands - Common flow demand Release Setpoint State Seite 5 Release Setpoint State July 2006 Release Setpoint State Marco Serafini Remark: Boiler release only below an adjustable outside temperature Confidential / Copyright © Siemens Schweiz AG 2006 Building Technologies / HVAC Products

RVS – Cascade functions Release lag boiler – modulating boiler • Switch on/off boilers before having a temperature deficide/overheat on B 10 (TVK) • Required temperature on the consumer side • Optimum efficiency with condensing boilers Seite 6 July 2006 Marco Serafini Confidential / Copyright © Siemens Schweiz AG 2006 Building Technologies / HVAC Products

RVS – Cascade functions Upper / lower limit output range power Heat demand Seite 7 July 2006 Marco Serafini time Confidential / Copyright © Siemens Schweiz AG 2006 Building Technologies / HVAC Products

RVS – Cascade functions Cascade management strategy Strategy 1 ON as late as possible and OFF as early as possible -> Lowest possible number of boilers in operation -> Non condensing boilers Seite 8 July 2006 Marco Serafini Confidential / Copyright © Siemens Schweiz AG 2006 Building Technologies / HVAC Products

RVS – Cascade functions Cascade management strategy Strategy 2 ON as late as possible and OFF as late as possible -> Lowest possible number of switching cycles Seite 9 July 2006 Marco Serafini Confidential / Copyright © Siemens Schweiz AG 2006 Building Technologies / HVAC Products

RVS – Cascade functions Cascade management strategy Strategy 3 ON as early as possible and OFF as late as possible -> Longest possible running times for lag boilers -> Condensing boilers Seite 10 July 2006 Marco Serafini Confidential / Copyright © Siemens Schweiz AG 2006 Building Technologies / HVAC Products

RVS – Cascade functions Cascading two 1 -stage boilers with one RVS 63 • QX 1, QX 2 can be set as boiler pump • B 2 has always to be connected • Its possible to connect additional RVS 63 controlling two 1 -stage boiler each -> Cascade flow sensor B 10 has to be connected Seite 12 July 2006 Marco Serafini Confidential / Copyright © Siemens Schweiz AG 2006 Building Technologies / HVAC Products

RVS – Cascade functions Cascading BMU’s with Open. Therm Bus 1 LPB Seg/Dev 0/2 0/3 2 3 OCI 364. 0 xx . . . 0/16 RVS 43/63 0/1 16 LMU 84 Seite 13 July 2006 Marco Serafini Confidential / Copyright © Siemens Schweiz AG 2006 Building Technologies / HVAC Products

RVS - Cascade Functions Exercise 3: Q 3 Demo case 1: LPB Adress 1 B 9 B 2 Y 1 Y 5 Q 2 Q 6 B 2 B 12 B 3 Demo case 2: LPB Adress 2 K 4/5 Demo case 3: LPB Adress 3 Par. 6212: Par. 6213: Par. 6215: Par. 6217: Seite 14 Check number of heat source 1 Check number of heat source 2 Check number of storage tank Check number of heating circuit July 2006 Marco Serafini Adress 1… 3 1 0 4 303 Confidential / Copyright © Siemens Schweiz AG 2006 Building Technologies / HVAC Products