Table of Contents
1 Conventions..........................................................................................................................................10
1.1 Warning signs, symbols and text formatting used in this manual..................................................10
1.2 Explanation of text formatting ............................................................................................................11
2 Safety instructions ...............................................................................................................................12
2.1 Disclaimer in the event of non-compliance .......................................................................................13
2.2 Personnel requirements, requirements on staff ...............................................................................13
2.3 Intended use .........................................................................................................................................14
2.4 Five safety rules according to DGUV Regulation 3...........................................................................15
2.5 Electrostatic-sensitive components and control components (ESD).............................................16
2.5.1 ESD - Rules for handling and working ...................................................................................................16
2.6 Abbreviations used ..............................................................................................................................16
3 System Design of UA 4xx E.................................................................................................................17
3.1 Application............................................................................................................................................17
3.2 Hardware ...............................................................................................................................................18
4 Application of UA 4xx E .......................................................................................................................20
4.1 Versions ................................................................................................................................................20
4.2 Controller types....................................................................................................................................22
4.3 Updating firmware................................................................................................................................24
5 Function UA 4xx E................................................................................................................................25
5.1 Starting characteristics .......................................................................................................................25
5.1.1 First start- reset controller to factory settings .........................................................................................25
5.1.2 Restart - restart of the controller.............................................................................................................26
5.2 Temperature zones...............................................................................................................................27
5.3 CAN bus mode......................................................................................................................................29
5.4 Standalone operation...........................................................................................................................30
5.4.1 Standalone operation using evaporator inlet sensors ............................................................................30
5.4.2 Standalone operation using activated local pressure transmitter...........................................................31
5.5 Selection of the sensor type ...............................................................................................................32
5.5.1 Necessary and optional sensors ............................................................................................................33
5.6 Description of controller functions ....................................................................................................35
5.7 Cooling ..................................................................................................................................................36
5.7.1 Temperature control ...............................................................................................................................36
5.7.2 Control of the expansion valves .............................................................................................................37
5.7.2.1 Control of continuous motor expansion valves ......................................................................................40
5.7.2.2 Enable relays for motor expansion valves..............................................................................................41
5.7.3 Continuous temperature control by supply and return air temperature..................................................43
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