Table of Contents
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ABB i-bus KNX
© 2010 ABB STOTZ-KONTAKT GmbH
Contents
3.2.12 Commissioning without bus voltage ................................................ 93
3.3
Communication objects...................................................................... 94
3.3.1
General ............................................................................................ 94
3.3.2
Manual operation............................................................................. 95
3.3.3
Control input .................................................................................... 96
3.3.3.1
3.3.3.2
Communication objects HVAC System 1 Control value/4-pipe,
with switching object ..................................................................... 97
3.3.3.3
3.3.3.4
Communication objects HVAC System 2 Control values/2-pipe,
with switching object ..................................................................... 99
3.3.3.5
Communication objects HVAC System 2 Control values/4-pipe 100
3.3.3.6
Communication object Fault control value.................................. 101
3.3.4
Multi-level fan ................................................................................ 102
3.3.5
One-level fan ................................................................................. 109
3.3.6
Valve HEATING............................................................................. 113
3.3.7
Valve COOLING ............................................................................ 115
3.3.8
Input A ........................................................................................... 116
3.3.9
Input B ........................................................................................... 118
3.3.10 Output ............................................................................................ 119
4
4.1
Heating, ventilation, climate control with Fan Coil units................... 121
4.1.1
Terms............................................................................................. 121
4.1.2
Fan operation ................................................................................ 122
4.1.2.1
Fan in a two-way connection ...................................................... 123
4.1.2.2
Fan with speed switching............................................................ 123
4.1.3
Configuration of a HVAC system with Fan Coil units .................... 124
4.1.4
Design of a Fan Coil unit .............................................................. 124
4.1.5
Pipe systems ................................................................................. 125
4.1.5.1
2 pipe system, configuration ....................................................... 126
4.1.5.2
2-pipe system HEATING and COOLING.................................... 127
4.1.5.3
2-pipe system HEATING or COOLING....................................... 128
4.1.5.4
3-pipe system, configuration ....................................................... 129
4.1.5.5
4-pipe system, configuration ....................................................... 130
4.2
System configuration with a Fan Coil Actuator ................................ 131
4.2.1
Automatic operation....................................................................... 132
4.2.2
Direct operation ............................................................................. 134
4.2.3
Switchover between automatic and direct operation..................... 134
4.2.4
Logic of the speed switching ......................................................... 135
4.2.5
Fan operation functional diagram.................................................. 136
4.3
Valve drives, valves and controller .................................................. 137
4.3.1
Electromotor valve drives .............................................................. 137
4.3.2
Electro-thermal valve drives .......................................................... 137
4.3.3
Valve curve .................................................................................... 138
4.3.4
Control types ................................................................................. 141
4.3.4.1
Continuous control ...................................................................... 141
4.3.4.2
Pulse width modulation (PWM)................................................... 142
4.3.4.3
Pulse width modulation - calculation.......................................... 144
4.4
Behaviour with, ... ............................................................................ 145
4.4.1
Bus voltage recovery ..................................................................... 145
4.4.2
Reset via bus................................................................................. 147
4.4.3
Download (DL)............................................................................... 148
4.4.4
Reaction on bus voltage failure ..................................................... 149
4.4.5
4.5
Priorities with, ... .............................................................................. 153
121
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