Viessmann VITODENS 300 WB3A, Service Instructions Manual

Page: 40 / 148

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
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
Further details regarding the individual steps
(cont.)
24
Initial start-up, inspection, maintenance
56
92
550
GB