Siemens RVD230 - Page 9

9/130
Siemens Building Technologies Basic Documentation RVD230 CE1P2383en
HVAC Products Contents 27.05.2004
23.4 Flow alarm ..................................................................................................... 86
23.4.1 Heating circuit and d.h.w. circuit with storage tanks...................................... 86
23.4.2 Direct d.h.w. heating via heat exchanger ......................................................87
23.5 Winter- / summertime changeover ................................................................ 88
23.6 Pump kick ...................................................................................................... 88
24 Function block M-bus parameters ................................................................. 89
24.1 Operating lines .............................................................................................. 89
24.2 General.......................................................................................................... 89
24.3 Addressing and identification......................................................................... 89
24.4 Baud rate ....................................................................................................... 89
24.5 Load management......................................................................................... 89
24.5.1 Load management of d.h.w. .......................................................................... 89
24.5.2 Load management of the heating system ..................................................... 90
24.5.3 Resetting the load control signals.................................................................. 90
24.5.4 Use on the LPB .............................................................................................90
24.5.5 Resolution of M-bus signals ..........................................................................90
25 Function block PPS parameters .................................................................... 91
25.1 Operating line ................................................................................................ 91
25.2 Function......................................................................................................... 91
26 Function block Test and display .................................................................... 92
26.1 Operating lines .............................................................................................. 92
26.2 Sensor test .................................................................................................... 92
26.3 Setpoint test................................................................................................... 92
26.4 Relay test....................................................................................................... 93
26.5 Display of pump speed .................................................................................. 93
26.6 Display of digital inputs.................................................................................. 93
26.7 Limitations ..................................................................................................... 94
26.8 Software version............................................................................................ 94
27 Function block DRT and maximum limitation of the return temperature ....... 95
27.1 Operating lines .............................................................................................. 95
27.2 Maximum limitation of the primary return temperature .................................. 95
27.2.1 General.......................................................................................................... 95
27.2.2 Maximum limitation in heating mode ............................................................. 96
27.2.3 Maximum limitation in d.h.w. heating mode................................................... 97
27.3 Maximum limitation of the secondary return temperature ............................. 97
27.4 Maximum limitation of the temperature differential (DRT function) ...............98
27.4.1 Mode of operation.......................................................................................... 98
27.4.2 Purpose ......................................................................................................... 98
27.5 Integral action time of the limitation functions................................................ 99