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9.4 System shut-down ............................................................................................................. 34
10. Diagnostics ...................................................................................................................... 35
10.1 System state .................................................................................................................... 35
10.2 Rest fault indication ......................................................................................................... 37
10.3 Involve HygroMatik service personnel ............................................................................. 37
11. Maintenance ..................................................................................................................... 38
11.1 Replacing the membrane ................................................................................................ 38
11.2 System separator: Maintaining and cleaning the cartridge ............................................. 41
11.3 Pressure regulator: inspect valve insert and strainer ...................................................... 42
11.4 Pressure regulator: replace backflow preventer .............................................................. 43
11.5 Pressure regulator functional check ................................................................................ 43
11.6 Drain valve functional check ............................................................................................ 43
11.7 Functional checks with pressure check equipment. ........................................................ 43
12. Placing out of operation and preservation ................................................................... 44
13. Spare parts ....................................................................................................................... 47
