Viessmann Vitodens 333 Service Instructions Manual page 34

Initial start-up, inspection, maintenance
Further details regarding the individual steps
A Consecutive list number
B User number
Adjusting heating curves (only for weather-compensated
control units)
The heating curves illustrate the rela-
tionship between the outside tem-
perature and the boiler water or the
flow temperature. To put it simply: The
lower the outside temperature, the
higher the boiler water or flow tem-
perature. The room temperature,
again, depends on the boiler water or
the flow temperature.
34
(cont.)
1. Press L and d simultaneously
for approx. 2 s. User check
initiated.
2. Select the required user with a
and b.
3. Activate checking with d.
"Check" flashes until its comple-
tion. The display and all key illumi-
nations of the selected user flash
for approx. 60 s.
&
"Check OK" flashes during com-
munication between both
devices.
&
"Check not OK" flashes if there
is no communication between
both devices. Check LON con-
nection.
4. For checking further users, proceed
as for items 2 and 3.
5. Press L and d simultaneously
for approx. 1 s. User check com-
pleted.
Settings in the delivered condition:
&
Slope = 1.4
&
Level = 0
Common heating curve slope (see
diagram):
in range A for underfloor heating
&
systems,
in range B for low temperature
&
heating systems (according to the
Energy Savings Order [Germany]).