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VARIA 826 S KNX Multi-functional display with room thermostat
5.6 Fan coil actuator control ...................................................................................... 122
5.6.1 Devices: .............................................................................................................. 122
5.6.2 Overview ............................................................................................................ 122
5.6.3 Important parameter settings .............................................................................. 123
5.6.3.1 Varia ........................................................................................................... 123
5.6.3.2 FCA 1 ......................................................................................................... 123
5.6.3.3 Presence detector ........................................................................................ 124
5.6.3.4 TA 2 ............................................................................................................ 124
5.6.4 Objects and links ................................................................................................ 125
5.7 Heating control with 6 heating circuits and window monitoring for caretakers.
126
5.7.1 Devices: .............................................................................................................. 126
5.7.2 Overview ............................................................................................................ 127
5.7.3 Important parameter settings .............................................................................. 128
5.7.3.1 Varia ........................................................................................................... 128
5.7.3.2 TA 2 ............................................................................................................ 129
5.7.3.3 RAM 712 .................................................................................................... 130
5.7.3.4 HMT 6 ........................................................................................................ 130
5.7.4 Objects and links ................................................................................................ 131
6 Appendix ........................................................................................................................ 134
6.1 Weather forecasts with Meteodata 139 EFR KNX ........................................... 134
6.2 Fan forced mode ................................................................................................... 135
6.3 PWM cycle ............................................................................................................ 137
6.3.1 Basic principle .................................................................................................... 137
6.3.2 Response to changes in the control variable ...................................................... 138
6.4 Operating mode scene .......................................................................................... 139
6.4.1 Principle ............................................................................................................. 139
6.4.2 Saving scenes: .................................................................................................... 139
6.4.3 Calling scenes: .................................................................................................... 140
6.5 Create and display scene telegrams .................................................................... 141
6.5.1 Allot scene numbers text .................................................................................... 142
6.5.1.1 Examples: ................................................................................................... 142
6.6 Setpoint value adjustment ................................................................................... 144
6.6.1 Format of setpoint adjustment: Relative ............................................................ 145
6.6.2 Format of setpoint adjustment: Absolute ........................................................... 147
6.7 Temperature control ............................................................................................ 149
6.7.1 Introduction ........................................................................................................ 149
6.7.2 Response of the P-control .................................................................................. 150
6.7.3 Response of the PI controller ............................................................................. 151
6.8 Continuous and switching control ...................................................................... 152
6.9 Hysteresis .............................................................................................................. 152
6.9.1 Negative hysteresis: ............................................................................................ 152
6.9.2 Positive hysteresis .............................................................................................. 153
6.10 Dead zone .............................................................................................................. 153
6.10.1 Case 1: Heating and cooling with continuous control .................................... 153
6.10.2 Case 2: Heating with 2-point control and cooling with continuous control ... 154
Updated: Sep-14 (Subject to change) Page 4 of 182
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