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Siemens Building Technologies Basic Documentation RVA63.242, RVA53.242 CE1P2373E
Landis & Staefa Division Contents 26.03.2001
5.24.1 Boost heating...................................................................................172
5.25 Frost protection for the plant (HK1 and HK2) ........................................173
5.25.1 Frost protection for the plant ...............................................................173
5.26 Control mode of actuator....................................................................174
5.27 Switching differential of actuator..........................................................175
5.27.1 Control of mixing valve actuator..........................................................175
5.28 Overtemperature protection for the pump heating circuit.........................176
5.29 Heat gains (Tf)..................................................................................177
5.30 Adaption sensitivity 1 (ZAF1)..............................................................177
5.31 Adaption sensitivity 2 (ZAF2)..............................................................178
5.32 P-band of mixing valve (Xp)................................................................179
5.33 Integral action time of mixing valve Y1 (Tn)...........................................179
5.34 Actuator running time mixing valve Y1.................................................179
D.h.w. .............................................................................................180
5.35 Maximum nominal setpoint of d.h.w. temperature (TBWmax)..................180
5.36 Switching differential of d.h.w. temperature (SDBW)..............................181
5.36.1 D.h.w. temperature control.................................................................181
5.36.2 D.h.w. temperature control with 2 sensors............................................182
5.37 Legionella function............................................................................183
5.38 Setpoint of legionella function.............................................................184
5.39 Discharge protection during d.h.w. heating...........................................184
Service............................................................................................185
5.40 Continuous display............................................................................185
5.41 Software version...............................................................................185
5.42 Device operating hours ......................................................................185
6 General control processes .................................................................186
6.1 Generation of the boiler temperature setpoint .......................................186
6.2 Maintained boiler return temperature...................................................187
6.3 Modulating burner control ..................................................................188
6.3.1 Setting rules for Xp, Tn and Tv............................................................188
6.3.2 Checking the control function..............................................................188
6.3.3 Control action too slow ......................................................................188
1.1.2 Control action too fast........................................................................189
6.4 Automatic 24-hour heating limit...........................................................190
1.1.3 Without room influence......................................................................190
6.4.1 With room influence..........................................................................190
6.5 Quick setback with room sensor..........................................................192
6.6 Overtemperature protection mixing heating circuit.................................192
6.7 Attenuated outside temperature..........................................................193
6.8 Composite outside temperature ..........................................................194
6.9 D.h.w. push......................................................................................195
6.10 Pump and valve kick .........................................................................196
6.11 Protection against discharging after d.h.w. heating................................196
6.12 Buffer storage tank operation..............................................................197