Viessmann 7838380 Notice De Montage page 16

GB
Replacing the control unit
04. Remove all existing extensions
(internal H1 or H2 extension, LON
communication module, cascade
module) and install them in the
new control unit.
05. Remove the boiler coding card and
insert it into the new control unit.
06. Release the locking tabs on the
control unit and remove the unit.
07. Insert the new control unit into the
control unit support and secure
with the locking tabs.
Adjusting the control unit to the heating system
Resetting codes to the factory set-
ting
Press the following buttons:
1. L + G simultaneously for
2. e
3. d
Starting the boiler
1. Fit the front panel.
16
approx. 2 s.
"Standard setting? Yes"
is displayed.
to confirm
or
(cont.)
08. Fit the pressure gauge and secure
with the bayonet fitting.
09. Connect all plugs to the control
unit.
10. Close the control unit enclosure
and pivot the control unit back up.
11. Insert the programming unit into
the new control unit.
4. a/b
Then set the coding addresses as
detailed in the table on page 13.
Note
The gas type only needs to be conver-
ted for operation with LPG. In the deliv-
ered condition, the control unit is set to
operate with natural gas.
2. Start the boiler and check it is work-
ing correctly.
to select "Standard set-
ting? No".