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

Additional Information

Replacement of Burner Control Unit LGM 29

Removing the circuit board
Setting the dip switch (applicable only to replacement boards)
ON
1 2 3 4 5 6 7 8
62
qQ
1. Unlock hooks located on both
sides of the control unit and remove
the control housing of the control
unit.
2. Remove pressure gage
3. Loosen the two screws located
underneath the control unit
carefully fold down the control unit.
4. Remove covers , ,
5. Remove all plug-in connectors and
the grounding wire, including #158
plug.
6. Slide off circuit board VR20
the supplied handle.
7. Loosen screws holding installed
circuit board LGM 29.22
and remove carefully.
1. Set dip switch setting of the new
circuit board according to the table
on the following page.
IMPORTANT
To ensure the boiler is operated in
accordance with its certification (see
boiler rating plate), the dip switch must
be 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.
.
and
and .
using
in place