Viessmann VITODENS 300 WB3A, Service Instructions Manual

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Required coding Address
1 heating circuit with mixer
&
with DHW cylinder 00:4
&
without DHW cylinder 00:3
Function relay of the internal extension: Cylinder loading
pump 53:3
System design 3
With/without DHW heating with low loss header, 1 heating circuit without
mixer and 1 heating circuit with mixer
!
Outside temperature sensor
?
Flow temperature sensor
%
Cylinder temperature sensor
sÖ
Heating circuit pump or boiler
circuit pump
sA
Cylinder loading pump (connec-
tion via external extension H1)
lH
Power supply
aVG
KM BUS
A
External extension H1
B
Low loss header
C
Extension kit for 1 heating circuit
with mixer
D
Maximum temperature controller
(underfloor heating)
Further details regarding the individual steps
(cont.)
26
Initial start-up, inspection, maintenance
56
92
550
GB