Viessmann Vitoplus 300 Service Instructions Manual page 27

Further details regarding the individual steps
System design 4
With/without DHW heating with one heating circuit without mixer A1 with
separate heating circuit pump and one heating circuit with mixer M2
! Outside temperature sensor
? Flow temperature sensor
% Cylinder temperature sensor
sÖ Heating circuit pump
aVG KM BUS
aBH Power supply (extension kit)
Required coding
Max. speed of the internal circulation pump in heating
mode: 20%
Initial start-up, inspection, maintenance
(cont.)
A External extension H1
B Maximum thermostat (underfloor
heating)
C Extension kit for a heating circuit
with mixer
Address
31:20
27