Viessmann Vitodens 333 Service Instructions Manual page 32

Initial start-up, inspection, maintenance
Further details regarding the individual steps
Connecting the control unit to the LON system (only for
weather-compensated control units)
The LON communication module (accessories) must be plugged in.
Installation instructions
Communication module LON
Note
Data transfer via the LON system can take 2 to 3 minutes.
Setting up LON user numbers
Adjust the user number via coding
address 77 (see the following table).
Updating the LON user list.
Only possible if all users are connected and the control unit is encoded as fault
manager (code 79:1).
1. Press L and d simultaneously
for approx. 2 s. User check initiated
(see page 33).
Single boiler system with Vitotronic 050 and Vitocom 300
Boiler control Vitotronic 050
unit
User no. 1 User no. 10
Code 77: 1 Code 77: 10
Control unit is fault Control unit is not
manager * 1 fault manager
Code 79: 1 Code 79: 0
*1
In each heating system, only one Vitotronic may be encoded as fault manager.
32
In a LON system, the same number
cannot be allocated twice.
2. Press e. The user list is updated
after approx. 2 min. User check
completed.
Vitotronic 050
User no. 11
Code 77: 11
– set
Control unit is not
* 1 fault manager *
Code 79: 0
(cont.)
Vitocom
User no. 99
Control unit is
fault manager
1