Siemens RVD230 - Page 6

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Siemens Building Technologies Basic Documentation RVD230 CE1P2383en
HVAC Products Contents 27.05.2004
12.10 Frost protection for the building .....................................................................52
12.10.1 General ..........................................................................................................52
12.10.2 Mode of operation with room sensor..............................................................52
12.10.3 Mode of operation without room sensor.........................................................53
12.11 Protective functions........................................................................................53
12.11.1 Pump kick ......................................................................................................53
12.11.2 Valve kick.......................................................................................................53
12.11.3 Shutdown of pump .........................................................................................53
13 Precontrol.......................................................................................................54
13.1 General ..........................................................................................................54
13.2 Heat demand .................................................................................................54
13.3 Control ...........................................................................................................54
13.4 Pump Q1........................................................................................................54
13.5 Pump and mixing valve overrun.....................................................................54
13.6 Frost protection ..............................................................................................55
13.7 Other functions...............................................................................................55
13.8 Room unit.......................................................................................................56
14 Function block Valve actuator heat converter / primary controller .................57
14.1 Operating lines...............................................................................................57
14.2 Mode of operation ..........................................................................................57
14.3 Control process..............................................................................................57
14.4 Maximum limitation of the flow temperature ..................................................57
14.5 Minimum limitation of the flow temperature ...................................................58
14.6 External heat demand at input H5 .................................................................58
14.7 External heat demand at input U1 .................................................................58
15 Function block Valve actuator heating circuit.................................................60
15.1 Operating lines...............................................................................................60
15.2 Mode of operation ..........................................................................................60
15.3 Control process..............................................................................................60
15.4 Maximum limitation of the flow temperature ..................................................60
15.5 Minimum limitation of the flow temperature ...................................................61
16 Function block D.h.w. heating........................................................................62
16.1 Operating lines...............................................................................................62
16.2 Release of d.h.w. heating ..............................................................................62
16.3 Control of the circulating pump ......................................................................63
16.4 Switching differential of d.h.w. control............................................................63
16.5 Legionella function .........................................................................................63
16.6 Priority of d.h.w. heating ................................................................................63
16.6.1 General ..........................................................................................................63