User Manual

2 / 66
Siemens RDF302 Basic documentation CE1P3079en
Smart Infrastructure Contents 2020-12-01
Contents
1. About this document ........................................................................... 4
1.1 Revision history ..................................................................................... 4
1.2 Reference documents ............................................................................ 5
1.3 Before you start ..................................................................................... 6
1.3.1 Copyright ............................................................................................... 6
1.3.2 Quality assurance .................................................................................. 6
1.3.3 Document use / request to the reader .................................................... 6
1.4 Target audience, prerequisites ............................................................... 7
1.5 Glossary ................................................................................................ 7
2. Summary .............................................................................................. 8
2.1 Types .................................................................................................... 8
2.2 Ordering ................................................................................................ 8
2.3 Functions ............................................................................................... 9
2.4 Integration via Modbus ......................................................................... 10
2.5 Equipment combinations ...................................................................... 11
2.6 Accessories ......................................................................................... 12
3. Functions ........................................................................................... 13
3.1 Temperature control ............................................................................. 13
3.2 Operating modes ................................................................................. 14
3.2.1 Different ways to influence the operating mode .................................... 15
3.3 Room temperature setpoint .................................................................. 17
3.3.1 Description .......................................................................................... 17
3.3.2 Setting and adjusting setpoints ............................................................ 18
3.4 Applications overview .......................................................................... 19
3.4.1 Applications for fan coil systems
*)
........................................................ 20
3.4.2 Applications for universal systems
*)
..................................................... 21
3.4.3 Applications for heat pump systems
*)
.................................................. 22
3.5 Additional functions .............................................................................. 23
3.6 Control sequences ............................................................................... 26
3.6.1 Sequences overview (setting via parameter P01) ................................. 26
3.6.2 2-pipe fan coil unit................................................................................ 27
3.6.3 2-pipe fan coil unit with electric heater .................................................. 28
3.6.4 4-pipe fan coil unit................................................................................ 30
3.6.5 Chilled / heated ceiling and radiator applications .................................. 32
3.6.6 Compressor applications...................................................................... 32
3.6.7 Setpoints and sequences ..................................................................... 33
3.7 Control outputs .................................................................................... 35
3.7.1 Overview ............................................................................................. 35
3.7.2 Control outputs configuration (setting via DIP switches or Modbus
commissioning tool) ............................................................................. 36
3.8 Fan control .......................................................................................... 37
3.9 Multifunctional input, digital input.......................................................... 40
3.10 Handling faults ..................................................................................... 42
3.11 Modbus RTU mode .............................................................................. 43
3.11.1 Fault function on Modbus ..................................................................... 43
3.12 Communication objects ........................................................................ 44