Replacement Of Burner Control Unit Lgm 29 - Viessmann VITODENS 200 Start-Up/Service Instructions

Vitodens 200 WB2 Service

Replacement of Burner Control Unit LGM 29

Removing the circuit board
1. Unlock hooks 1 located on both sides of the control
unit and remove the control housing 2 of the control
unit.
2. Remove pressure gauge 3.
3. Loosen the two screws located underneath the control
unit 4 and carefully fold down the control unit.
4. Remove covers 5, 6, 7 and 8.
5. Remove all plug-in connectors and the grounding wire.
6. Slide off circuit board VR20 8 using the supplied
handle.
7. Loosen screws holding installed circuit board LGM
29.22 qP in place and remove carefully.
Setting the dip switch (applicable only to replacement boards)
1. Set dip switch qQ setting of the new circuit board
according to the table on the following page.
IMPORTANT
The boiler must be operated in accordance with its
certification (see boiler rating plate). Thus ensure that
the dip switch setting is set according to the table on the
following page.
Note: that in the factory default setting all switches are
set to "OFF".
2. Remove fuse holder from fuse F3 of the removed
circuit board LGM 29.22 and install on fuse F3 on
replacement circuit board LGM 29.55.
Additional Information
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