Viessmann Vitodens 333 Service Instructions Manual page 88

Troubleshooting
Repairs
(cont.)
Switch position I for central heating
return from the left (delivered condi-
tion).
Checking the Vitotronic 050 (accessories)
The Vitotronic 050 is connected with the control unit via the LON connecting
cable. To test the connection, implement a user check at the boiler control unit
(see page 39).
Changing the combustion control parameters
The parameters are changed via the coding addresses in code 2.
Calling up coding addresses
1. Press L and G simultaneously
for approx. 2 s; confirm with d.
2. Select the required coding address
"11" with a or b; the address
flashes; confirm with d; the value
flashes.
3. Adjust value "9" with a or b;
confirm with d. The green ON
indicator flashes.
The access to the coding
addresses of the parameters is
open.
88
Switch position II for central heating
return from the right.
4. Select the required coding address
with a or b (see the following
table) and change the value.
5. Select 11 9 to exit the value of the
coding address; then press L and
G simultaneously for approx. 1 s.
Encoding has been terminated.
Note
If setting the parameters is not con-
cluded via coding address 11, the
system automatically terminates
the parameter change after approx.
25 min.