Siemens RVD230 - Page 8

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Siemens Building Technologies Basic Documentation RVD230 CE1P2383en
HVAC Products Contents 27.05.2004
18.2 Mode of operation ..........................................................................................75
19 Function block Valve actuator d.h.w. .............................................................77
19.1 Operating lines...............................................................................................77
19.2 Mode of operation ..........................................................................................77
19.3 Control process..............................................................................................77
19.4 Setpoint boost ................................................................................................78
19.4.1 Charging boost...............................................................................................78
19.4.2 Flow temperature boost .................................................................................78
19.5 Maximum setpoint of the d.h.w. temperature.................................................78
19.6 D.h.w. heating with 2 storage tank sensors ...................................................78
19.7 Adjustable load limit .......................................................................................79
19.7.1 Adjustment to the time of year .......................................................................79
19.7.2 Load limit........................................................................................................79
19.7.3 Child-proofing.................................................................................................79
20 Function block Assignment of d.h.w. heating.................................................80
20.1 Operating line.................................................................................................80
20.2 Assignment of d.h.w. heating.........................................................................80
21 Function block LPB parameters.....................................................................81
21.1 Operating lines...............................................................................................81
21.2 LPB parameters .............................................................................................81
21.2.1 Addressing the devices..................................................................................81
21.2.2 Source of time of day .....................................................................................81
21.2.3 Bus power supply...........................................................................................82
21.2.4 Outside temperature source ..........................................................................82
22 Locking signals ..............................................................................................83
22.1 Fundamentals ................................................................................................83
22.2 Critical locking signals....................................................................................83
22.3 Uncritical locking signals................................................................................84
22.3.1 General ..........................................................................................................84
22.3.2 Controller-internal uncritical locking signals...................................................84
22.3.3 Uncritical locking signals from the data bus...................................................84
23 Function block Device functions ....................................................................85
23.1 Operating lines...............................................................................................85
23.2 Actuator pulse lock.........................................................................................85
23.3 Frost protection for the plant ..........................................................................85
23.3.1 Principle .........................................................................................................85
23.3.2 Mode of operation with outside sensor ..........................................................85
23.3.3 Mode of operation without outside sensor .....................................................86
23.3.4 Frost protection for the heating circuit flow ....................................................86