Viessmann Vitodens 333 Service Instructions Manual page 30

Initial start-up, inspection, maintenance
Further details regarding the individual steps
System version 4
One heating circuit without mixer A1, one heating circuit with mixer M2
and system separation
!
Outside temperature sensor
?
Flow temperature sensor
sÖ
Heating circuit pump
lH
Power supply (extension kit)
aVG KM BUS
Required coding
Operation with LPG
30
(cont.)
A
Extension kit for a heating circuit
with mixer
B
Maximum temperature thermo-
stat (underfloor heating)
C
Heat exchanger for system
separation
1E:1