Basic Documentation

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Siemens Universal controllers RMU710B, RMU720B, RMU730B CE1P3150en
Building Technologies Table of contents 03.10.2011
17 Frost protection (basic types A and P) .............................................211
17.1 Activate block ........................................................................................211
17.2 Operating principle ................................................................................213
17.3 Acknowledgment...................................................................................216
17.4 Connection diagrams ............................................................................217
17.5 Troubleshooting.....................................................................................218
18 Preheating function (basic types A, P) .............................................219
18.1 Activate block ........................................................................................219
18.2 Operating principle ................................................................................219
18.3 Troubleshooting.....................................................................................221
19 Sustained mode (basic type A) ..........................................................222
19.1 Activate function....................................................................................222
19.2 Sustained mode operation ....................................................................223
19.3 Examples of sustained mode ................................................................227
20 Recirculated air op (basic type A) .....................................................229
20.1 Activate function....................................................................................229
20.2 Recirculated air operation .....................................................................229
21 Night cooling (basic type A)...............................................................231
21.1 Activate block ........................................................................................231
21.2 Operating principle ................................................................................231
21.3 Troubleshooting.....................................................................................232
22 Optimum start control (basic type A)................................................233
22.1 Activate function....................................................................................233
22.2 Optimum start control for cooling and heating ......................................233
23 Fan speed controller, demand-controlled (basic type P)................237
23.1 General..................................................................................................237
23.2 Demand-controlled speed control with pressure setpoint optimization 238
23.3 Set pressure setpoint compensation by damper position .....................238
23.4 Application examples ............................................................................241
23.5 Diagnostics: Pressure setpoint optimization .........................................244
23.6 Air volume flow balancing .....................................................................245
23.7 General commissioning notes...............................................................245
24 Faults....................................................................................................246
24.1 Purpose and activation..........................................................................246
24.2 Fault categories.....................................................................................246
24.3 Universal fault inputs (1…10)................................................................247
24.4 Predefined fault inputs ..........................................................................248
24.5 External fault button ..............................................................................251
24.6 Fault relay..............................................................................................251
24.7 Fan release relay ..................................................................................252
24.8 Function check / wiring test...................................................................252