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6.2 Check water pressure ........................................................................................................................... 57

6.3 Switching-on ...................................................................................................................................... 57

6.4 Temperatures for heating and drinking water ........................................................................................ 58

6.5 Individual time programme .................................................................................................................. 58

6.6 Instruction for the customer ................................................................................................................. 58

7. Operation ........................................................................................................................................... 60

7.1 Operating elements ............................................................................................................................. 60

7.2 Display ............................................................................................................................................... 61

7.3 Setting up heating operation ................................................................................................................ 61

7.4 Stop drinking water operation .............................................................................................................. 62

7.5 Setting room setpoint .......................................................................................................................... 62

7.6 Display information ............................................................................................................................. 63

7.7 Error message ..................................................................................................................................... 63

7.8 Servicing message ............................................................................................................................... 64

7.9 Emergency mode (Manual control) ........................................................................................................ 64

7.10 Restoring factory setting ...................................................................................................................... 64

8. Programming ...................................................................................................................................... 65

8.1 Programming procedure ...................................................................................................................... 65

8.2 Modification of parameters .................................................................................................................. 66

8.3 Setting table ....................................................................................................................................... 68

8.4 Parameter list explained ...................................................................................................................... 93

9. Maintenance ...................................................................................................................................... 143

9.1 Inspection and need dependent service ................................................................................................. 143

9.2 Boiler view .......................................................................................................................................... 144

9.3 Clean fan ............................................................................................................................................ 146

9.4 Check and replace ignition and ionisation electrode ................................................................................ 148

9.5 Clean burner pipe ................................................................................................................................ 149

9.6 Clean heat exchanger and siphon ......................................................................................................... 150

9.7 Control and regulating centre LMS ........................................................................................................ 153

9.8 Fault switch-off ................................................................................................................................... 154

9.9 Connect air pressure monitor lines ........................................................................................................ 154

9.10 Fault code table ................................................................................................................................... 155

9.11 Maintenance code table ....................................................................................................................... 158

9.12 Operating phases of the Control Centre LMS .......................................................................................... 158