Viessmann VITOTRONIC 300 Installation And Service Instructions Manual page 7

System version 3
One direct connected heating circuit without mixer and one mixer circuit
B
A
B
C
D
E
F
Plug
!
?
§
%
Required coding
*1
Check valve; only required if joined to a connector.
*2
e.g. for underfloor heating control via flow and return temperature sensor.
*3
Standard delivery
E
only
boiler.
C
A
aJ
sÖ
sÖ
sA
sK
fÖ
fA
lÖ
aVG
aBH
a:A
Automatic changeover
D
F
7