Viessmann Vitoplus 300 Service Instructions Manual page 25

Further details regarding the individual steps
System design 2
With/without DHW heating with one heating circuit without mixer A1 and
one heating circuit with mixer M2.
Note
The volume flow of the heating circuit without mixer must be at least 30%
greater than the volume flow of the heating circuit with mixer.
! Outside temperature sensor
? Flow temperature sensor
% Cylinder temperature sensor
sÖ Heating circuit pump
aVG KM BUS
Initial start-up, inspection, maintenance
(cont.)
aBH Power supply (extension kit)
A Maximum thermostat (underfloor
heating)
B Extension kit for a heating circuit
with mixer
25