Viessmann Vitodens 333 Service Instructions Manual page 29

Further details regarding the individual steps
System version 3
One heating circuit without mixer A1 and one heating circuit with mixer M2
!
Outside temperature sensor
?
Flow temperature sensor
sÖ
Heating circuit pump
lH
Power supply (extension kit)
aVG KM BUS
Note
The flow rate of the heating circuit without mixer must be at least 30% greater
than the flow rate of the heating circuit with mixer.
Required coding
Operation with LPG
Initial start-up, inspection, maintenance
(cont.)
A
Maximum temperature thermo-
stat (underfloor heating)
B
Extension kit for a heating circuit
with mixer
1E:1
29