Siemens RVL470 Basic Documentation page 6

CE1P2522E / 30.03.2000
TOC-IV
12.1. Operating lines .............................................................................................. 39
12.2. Limitations ..................................................................................................... 39
12.2.1. Secondary flow temperature.......................................................................... 39
12.2.2. Maximum limitation of primary return temperature ........................................ 39
12.2.2.1. Purpose 39
12.2.2.2. Generation of maximum limit value ............................................................... 39
12.2.2.3. Function40
12.2.3. Maximum limitation of the return temperature differential (DRT limitation) .... 40
12.2.3.1. Function40
12.2.3.2. Purpose 40
12.2.4. Integral action time ........................................................................................ 41
12.2.5. Minimum limitation of stroke (suppression of hydraulic creep) ...................... 41
12.2.6. Flow limitation................................................................................................ 41
13. Function block "Service functions and general settings"....................... 42
13.1. Operating lines .............................................................................................. 42
13.2. Display functions ........................................................................................... 43
13.2.1. Flow temperature setpoint ............................................................................. 43
13.2.2. Heating curve ................................................................................................ 44
13.3. Commissioning aids ...................................................................................... 44
13.3.1. Simulation of outside temperature................................................................. 44
13.3.2. Relay test ...................................................................................................... 45
13.3.3. Sensor test .................................................................................................... 45
13.3.4. Test of H-contacts ......................................................................................... 46
13.4. Auxiliary functions ......................................................................................... 46
13.4.1. Frost protection for the plant ......................................................................... 46
13.4.2. Flow alarm..................................................................................................... 46
13.4.3. Manual overriding of operating mode (contact H1)........................................ 47
13.4.4. Pump overrun................................................................................................ 47
13.4.5. Pump kick...................................................................................................... 48
13.4.6. Winter- / summertime changeover ................................................................ 48
13.4.7. Gain of locking signal .................................................................................... 48
13.4.7.1. Fundamentals................................................................................................ 48
13.4.7.2. Uncritical locking signals ............................................................................... 48
13.4.7.3. Critical locking signals ................................................................................... 48
13.5. Entries for LPB .............................................................................................. 49
13.5.1. Source of time of day .................................................................................... 49
13.5.2. Source of outside temperature ...................................................................... 50
13.5.3. Addressing of devices ................................................................................... 50
13.5.4. Bus power supply .......................................................................................... 51
13.5.5. Bus loading characteristic ............................................................................. 51
14. Function block "Contact H2" ..................................................................... 52
14.1. Operating line ................................................................................................ 52
14.2. Description .................................................................................................... 52
15. Function block "External inputs" .............................................................. 53
15.1. Operating lines .............................................................................................. 53
15.2. Contact H2 .................................................................................................... 53
15.3. Hours run counter.......................................................................................... 53
15.4. Software version............................................................................................ 53
Basic Documentation RVL470
Contents
Siemens Building Technologies
Landis & Staefa Division