Viessmann VITODENS 300 Service Instructions Manual page 26

Initial start-up, inspection, maintenance
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
lH Power supply (extension kit)
Required coding
Operation with natural gas (as delivered condition)
or
Operation with LPG
System with only one heating circuit with mixer
with DHW cylinder
without DHW cylinder
26
(cont.)
aVG KM BUS
A Maximum thermostat (underfloor
heating)
B Extension kit for a heating circuit
with mixer
Address
82:0
82:1
00:4
00:3