Viessmann Vitodens 300 Service Instructions Manual page 24

Initial start-up, inspection, maintenance
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 38.
System design 1
With/without DHW heating with 1 heating circuit without mixer
! Outside temperature sensor (only
for weather-compensated control
units)
or
lH Vitotrol 100 (only for constant
temperature control units)
% Cylinder temperature sensor
sÖ Heating circuit pump
24
(cont.)
sA Cylinder loading pump (connec-
tion via external extension H1)
sK Cylinder loading pump (connec-
tion via internal extension H1 or
H2)
A Internal extension H1 or H2
or
External extension H1