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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