Viessmann Vitodens 333 Service Instructions Manual page 35

Further details regarding the individual steps
Reduced room temperature
Example 2: Adjustment of the reduced
room temperature from 5 °C to 14 °C
A Boiler water temperature or flow
temperature in °C
B Outside temperature in °C
C Set room temperature in °C
D Heating circuit pump "OFF"
E Heating circuit pump "ON"
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
LON communication module
Note
The data transfer via the LON system can take 2 to 3 min.
Setting up LON user numbers
Adjust the user number via coding
address "77" (see the following table).
Initial start-up, inspection, maintenance
(cont.)
Press the following keys:
1. a
"1r" flashes.
2. d
to select heating circuit A1
(heating circuit without
mixer)
or
3. a
"2r" flashes.
4. d
to select heating circuit M2
(heating circuit with mixer)
5. E
Calling up the set night
temperature.
6. a/b Change the value.
7. d
Confirm the value.
In a LON system, the same number
cannot be allocated twice.
35