Viessmann Vitodens 300 Service Instructions Manual page 31

Further details regarding the individual steps
Required coding
Multi-boiler system with Vitotronic 333
Note
Codes for multi-boiler system, see
Vitotronic 333 installation and operat-
ing instructions.
Connecting the control unit to the LON system (only for
weather-compensated control units)
The LON communication module (accessory) must be plugged in.
Installation instructions
LON communication module
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 below).
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 seconds. User check
initiated (see page 32).
Single boiler system with Vitotronic 050 and Vitocom 300
Initial start-up, inspection, maintenance
(cont.)
In a LON system, the same number
cannot be allocated twice.
2. Press e. The user list is updated
after approx. 2 minutes. User
check completed.
Address
01:2
31