2 | © Danfoss | 2020.02 AQ167786463757en-000402
District Heating Substations
1.0 General information 3 ..........................................................................................................................................................................................................................
1.1 Information on installation and operating instruction manual 3 ....................................................................................................................................
1.2 Other applicable documents 3 ....................................................................................................................................................................................................
1.3 Explanation of symbols 3 ...............................................................................................................................................................................................................
1.4 Liability and warranty 3 ...................................................................................................................................................................................................................
1.5 Copyright 4 ..........................................................................................................................................................................................................................................
1.6 Spare parts 4 .......................................................................................................................................................................................................................................
1.7 Dismantling 4 ......................................................................................................................................................................................................................................
1.8 Disposal 4 ............................................................................................................................................................................................................................................
2.0 Safety ................................................................................................................................................................................................................................................5
2.1 General information 5 .....................................................................................................................................................................................................................
2.2 Responsibility of the operator 5 ................................................................................................................................................................................................
2.3 Intended use 5 ...................................................................................................................................................................................................................................
2.4 Possible misuse 5 ..............................................................................................................................................................................................................................
2.5 Safety work 5 ......................................................................................................................................................................................................................................
2.6 Personal protective equipment 6 ...............................................................................................................................................................................................
2.7 Possible hazards of the device 6 .................................................................................................................................................................................................
2.8 Emergency stop switch 7 ..............................................................................................................................................................................................................
2.9 Operating personnel 7 ...................................................................................................................................................................................................................
2.10 Actions in the event of danger or accidents 7 .......................................................................................................................................................................
2.11 Residual hazards / hazard analysis 8 ........................................................................................................................................................................................
3.0 Technical data 9 ......................................................................................................................................................................................................................................
3.1 Technical and main system data 9 ..............................................................................................................................................................................................
3.1.1 CE label 9 ...................................................................................................................................................................................................................................
3.1.2 Dimensions and packaging 9 ............................................................................................................................................................................................
3.2 Symbols used in circuit diagrams 10 .........................................................................................................................................................................................
4.0 Function and configuration 10 .........................................................................................................................................................................................................
4.1 Function 10 .........................................................................................................................................................................................................................................
4.2 DSE FLEX configuration possibilities 11 ...................................................................................................................................................................................
5.0 Transport, packaging and storage 12 .............................................................................................................................................................................................
5.1 Transport of pallets by forklift .............................................................................................................................................................................................. 12
5.2 Transport inspection 12 .................................................................................................................................................................................................................
5.3 Packaging 13 .....................................................................................................................................................................................................................................
5.4 Storage 13 .........................................................................................................................................................................................................................................
6.0 Installation .......................................................................................................................................................................................................................................... 13
6.1 Installation preparation 14 .........................................................................................................................................................................................................
6.1.1 Primary connection 14 ........................................................................................................................................................................................................
6.1.2 Secondary connection 14 ...................................................................................................................................................................................................
6.1.3 Electrical connection 14 ......................................................................................................................................................................................................
6.2 Draining station 17 ........................................................................................................................................................................................................................
7.0 Commissioning ................................................................................................................................................................................................................................. 18
7.1 Requirements for commissioning 18 ......................................................................................................................................................................................
7.2 Secondary side commissioning 18 ..........................................................................................................................................................................................
7.3 Primary-side commissioning 18 ...............................................................................................................................................................................................
7.4 Requirements for commissioning 19 ......................................................................................................................................................................................
7.5 Fault and Shutdown 19 ................................................................................................................................................................................................................
7.6 Commissioning after a failure or malfunctioning 19 ........................................................................................................................................................
8.0 Operation 19 ..........................................................................................................................................................................................................................................
8.1 Switching on 19 ..............................................................................................................................................................................................................................
8.2 Switching off 19 ..............................................................................................................................................................................................................................
8.3 Restarting after substation shutdown 19 ..............................................................................................................................................................................
8.4 Service / clean - strainer .......................................................................................................................................................................................................... 20
8.5 Service / disassembly and replacement - heat exchanger ......................................................................................................................................... 21
8.6 Service / Check - Safety valve and expansion vessel 21 ....................................................................................................................................................
9.0 Maintenance 22 ....................................................................................................................................................................................................................................
9.1 Safety warning 22 ..........................................................................................................................................................................................................................
9.2 Maintenance plan (recommendations) ............................................................................................................................................................................ 22
9.3 Heat exchanger maintenance 23 .............................................................................................................................................................................................
9.4 Maintenance validation 23 .........................................................................................................................................................................................................
10.0 Troubleshooting 24 .....................................................................................................................................................................................................................
10.1 Safety .......................................................................................................................................................................................................................................... 27
11.0 Spare parts 27 ................................................................................................................................................................................................................................
12.0 Index 28 ..................................................................................................................................................................................................................................
Table of contents