Viessmann GC1 - Calling up Coding Level 1

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Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service
Calling up Coding Level 1
Coding 1, Vitotronic 100
1. Press OK and simultaneously for approx. 4 sec.
flashes on the display.
2. With , select 1 for coding level 1 and confirm with
OK. I flashes on the display for the coding addresses
of group 1.
3. Select the group for the required coding address with
:
1: “General”
2: “Boiler”
6: “All codes std device”. In this group, all coding
addresses of coding level 1 are displayed in
ascending order.
Confirm selected group with OK.
4. Select the coding address with .
5. Select value according to the following tables with
and confirm with OK.
6. If you want to reset all codes to their factory set
delivered condition:
Select 7 with and confirm with OK.
When D flashes, confirm with OK.
Note: This also resets codes on coding level 2.
7. Exit coding level 1:
Press .
8. Exit the service level:
Select 9 with  “Serv”.
Confirm with OK.
“OFF” flashes.
Confirm with OK.
Note: The system exits the service level automatically
after 30 min.
Note: Codes that have no function due to the heating
system equipment level or the setting of other
codes are not displayed.