Contents
1 Safety instructions 4
1.1 Meaning of the safety instructions 4
2 General information 5
2.1 Introduction 5
2.2 Liability limitation 5
2.3 Intended use 5
3 Operation for the first time 6
3.1 Setting the setpoint temperature 6
3.2 Setting the time and the date 6
3.3 Setting the weekly switching programme 6
4 Functions – settings – parameterisation 8
5 Connection diagrams 9
6 Dimension drawing 10
7 Overview of display 10
8 Description of operation 12
8.1 Description of the operating modes 13
8.2 Description of changing setpoints 14
8.3 Description of service parameters for TRA 421 16
9 Troubleshooting 18
10 Disposal 18
11 Cleaning 18
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