4
6 Commissioning and startup..................................................................................................31
6.1 Conditions...........................................................................................................................31
6.1.1 Connecting measuring device........................................................................................32
6.1.2 Air pressure switch presetting........................................................................................33
6.1.3 Gas pressure regulator presetting.................................................................................33
6.1.4 Setting values.....................................................................................................................34
6.2 Burner setting.....................................................................................................................35
6.3 Setting air pressure switch..............................................................................................42
6.4 Concluding works............................................................................................................. 42
6.5 Combustion analysis.........................................................................................................43
6.6 Calculating gas throughput.............................................................................................44
6.7 Subsequent optimization of the operating points.......................................................45
7 Shutdown....................................................................................................................................... 46
8 Maintenance and service........................................................................................................47
8.1 Notes on maintenance and service................................................................................47
8.2 Service plan........................................................................................................................ 48
8.3 Removing and re-installing the mixing head.................................................................49
8.4 Setting the mixing head....................................................................................................50
8.5 Setting the ionization and ignition electrodes..............................................................51
8.6 Service position................................................................................................................. 52
8.7 Removing and re-installing the blower wheel.............................................................. 53
8.8 Removing the burner motor.............................................................................................54
8.9 Removing and re-installing the air damper stepping motor......................................55
8.10 Removing and re-installing the angle drive...................................................................56
8.11 Removing and re-installing the gas butterfly stepping motor...................................57
8.12 Removing and re-installing the gas butterfly valve...................................................... 58
8.13 Removing and re-installing the air regulator................................................................. 59
8.14 Replacing the combustion manager..............................................................................58
8.15 Replacing the combustion manager’s fuse..................................................................62
9 Faults rectification......................................................................................................................63
9.1 Procedures during fault condition..................................................................................63
9.1.1 Display off............................................................................................................................63
9.1.2 Display showing OFF........................................................................................................63
9.1.3 Display flashing.................................................................................................................. 64
9.1.4 Detailed fault codes.......................................................................................................... 65
9.2 Faults codes, causes and rectification..........................................................................66
9.3 Operating problems..........................................................................................................71
Installation and Operating Instructions
G
as burner WG20.../1-C ZM-LN (W-FM 25)
83055116 • 1/2016-05
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