Viessmann VITODENS 333 Service Instructions Manual page 27

Further details regarding the individual steps
Matching the control unit to the heating system
Note
The control unit must be matched to the system equipment. Various system
components are automatically recognised by the control unit, and codes are
automatically set.
&
For selection of an appropriate design, see the following diagrams.
&
For coding steps, see page 39.
System design 1
With one heating circuit without mixer A1
! Outside temperature sensor (only
for weather-compensated control
units)
or
Initial start-up, inspection, maintenance
(cont.)
4. After testing, press d.
5. Record the actual value in the ser-
vice report.
lH Vitotrol 100 (only for constant
temperature control units)
27