CE1P2522E / 30.03.2000
Basic Documentation RVL470
Siemens Building Technologies
TOC-IV
Contents
Landis & Staefa Division
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. Function 40
12.2.3.
Maximum limitation of the return temperature differential (DRT limitation) .... 40
12.2.3.1. Function 40
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
