Viessmann Vitoplus 300 Service Instructions Manual page 26

Initial start-up, inspection, maintenance
Further details regarding the individual steps
System design 3
With/without DHW heating with one heating circuit without mixer A1 and
one heating circuit with mixer M2 and system separation
! Outside temperature sensor
? Flow temperature sensor
% Cylinder temperature sensor
sÖ Heating circuit pump
aVG KM BUS
aBH Power supply (extension kit)
26
(cont.)
A Maximum thermostat (underfloor
heating)
B Extension kit for a heating circuit
with mixer
C Heat exchanger for system
separation