Buderus Logano plus GB402 Installation And Maintenance Instructions Manual page 3

8.2 Shutting down the heating system in
emergencies . . . . . . . . . . . . . . . . . . . . . . . . 39
9 Inspection and maintenance . . . . . . . . . . . . . 40
9.1 Preparing the boiler for servicing . . . . . . . . 40
9.2 General work . . . . . . . . . . . . . . . . . . . . . . . . 40
9.3 Internal leak test . . . . . . . . . . . . . . . . . . . . . . 41
9.3.1 Determining the test volume . . . . . . . . . . . . 41
9.3.2 Carrying out the leak test . . . . . . . . . . . . . . 42
9.4 Checking the heating system operating
pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
9.5 Measuring carbon dioxide content . . . . . . . 43
9.6 Cleaning the burner and heat exchanger . . 44
9.6.1 Removing and cleaning burner . . . . . . . . . . 44
9.6.2 Cleaning the heat exchanger . . . . . . . . . . . 46
9.7 Inspecting the burner electrodes . . . . . . . . 47
9.8 Replacing components . . . . . . . . . . . . . . . . 48
9.8.1 Removing the gas valve . . . . . . . . . . . . . . . . 48
9.8.2 Changing the gas filter . . . . . . . . . . . . . . . . 48
9.8.3 Removing the fan . . . . . . . . . . . . . . . . . . . . . 49
9.9 Refitting detached parts . . . . . . . . . . . . . . . 49
9.9.1 Fitting the fan . . . . . . . . . . . . . . . . . . . . . . . . 50
9.9.2 Fitting the ventilation air collector and
the gas valve . . . . . . . . . . . . . . . . . . . . . . . . 50
9.9.3 Installing the burner . . . . . . . . . . . . . . . . . . . 50
9.9.4 Fitting the gas line to the gas valve . . . . . . 50
9.9.5 Fitting the ventilation air unit . . . . . . . . . . . . 51
9.10 Checking for leaks during operation . . . . . 51
9.11 Checking the ionisation current . . . . . . . . . 51
9.12 Completing inspection and maintenance . 51
9.12.1Removing meters . . . . . . . . . . . . . . . . . . . . . 51
9.12.2Installing casing parts . . . . . . . . . . . . . . . . . 51
9.12.3Confirming inspection and service . . . . . . . 51
9.13 Replacing the gaskets subject to time in
use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
9.14 Inspection and maintenance reports . . . . . 52
10 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . 55
10.1 Recognising the operating state and
resetting faults . . . . . . . . . . . . . . . . . . . . . . . 55
10.2 Operating and fault displays . . . . . . . . . . . . 56
10.2.1Operating messages . . . . . . . . . . . . . . . . . . 56
10.2.2Fault displays . . . . . . . . . . . . . . . . . . . . . . . . 57
11 Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
11.1 Sensor curves . . . . . . . . . . . . . . . . . . . . . . . 67
11.2 Hydraulic resistance . . . . . . . . . . . . . . . . . . 68
11.3 MC10 connection diagram . . . . . . . . . . . . . 68
11.4 SAFe connection diagram . . . . . . . . . . . . . . 71
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Logano plus GB402 - Subject to technical modifications!
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