Siemens RVL481 - Page 9

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Siemens Heating and D.h.w. Controller RVL481 CE1P2541en
Building Technologies Contents 20.05.2008
25.3.2 Relay test.......................................................................................................84
25.3.3 Sensor test ....................................................................................................85
25.3.4 Test of H–contacts.........................................................................................86
25.4 Auxiliary functions..........................................................................................86
25.4.1 Frost protection for the plant..........................................................................86
25.4.2 Flow alarm.....................................................................................................86
25.4.3 Manual overriding of operating mode (contact H1) .......................................87
25.4.4 Pump overrun................................................................................................87
25.4.5 Pump kick......................................................................................................88
25.4.6 Winter- / summertime changeover ................................................................88
25.4.7 Gain of locking signal ....................................................................................88
25.5 Entries for LPB ..............................................................................................89
25.5.1 Source of time of day.....................................................................................89
25.5.2 Outside temperature source..........................................................................90
25.5.3 Addressing the devices .................................................................................90
25.5.4 Bus power supply ..........................................................................................91
25.5.5 Bus loading number.......................................................................................91
25.6 Heat demand output DC 0…10 V..................................................................91
26 Function block "D.h.w. solar charging" ....................................................92
26.1 Operating lines ..............................................................................................92
26.2 Functions.......................................................................................................92
26.2.1 Temperature differential ON/OFF solar.........................................................92
26.2.2 Minimum charging temperature.....................................................................93
26.2.3 Minimum runtime...........................................................................................94
26.2.4 Collector frost protection temperature ...........................................................94
26.2.5 Collector temperature to protect against overheating....................................95
26.2.6 Storage tank recooling...................................................................................95
26.2.7 Evaporation temperature of heat carrier........................................................96
26.2.8 Maximum limitation of charging temperature.................................................97
26.2.9 Storage tank temperature maximum limitation..............................................97
26.2.10 Collector start function gradient.....................................................................98
27 Function block "Locking functions"..........................................................99
27.1 Operating line ................................................................................................99
27.2 Locking the settings on the software side......................................................99
27.3 Locking the settings for district heat on the hardware side............................99
28 Communication .........................................................................................100
28.1 Combination with room units .......................................................................100
28.1.1 General........................................................................................................100
28.1.2 Combination with room unit QAW50 ...........................................................100
28.1.3 Combination with room unit QAW70 ...........................................................101