Viessmann Vitotronic 200 Installation And Service Instructions For Contractors page 125

Connection and wiring diagram
Heating circuit pump for heating circuit 1
sÖ A1
without mixer
or
Primary cylinder loading pump for cylinder
loading system
or
Circulation pump for flue gas/water heat
exchanger
or
Switching output for flow rate reduction
(Therm-Control)
Circulation pump for cylinder heating
sA
or
Secondary cylinder loading pump for cylin-
der loading system
DHW circulation pump
sK
Shunt pump
sL
or
Boiler circuit pump
or
Boiler circuit pump with butterfly valve func-
tion
(cont.)
fÖ
fA
gÖ
A1
gS
lÖ
aBÖ
aBA
aBH
F1 and F2 Fuse
F6
F7
K1 to K10 Relay
S1
S2
X
Connection and wiring diagrams
Power supply, 230 V/50 Hz
Burner stage 1
Central fault message facility
Mixing valve for return temperature control
or
Mixing valve, heat exchanger set
Burner stage 2
or
Modulating burner
External safety equipment
Provisional burner operation
Safety chain (potential-free)
Mains connection for accessories
High limit safety cut-out
Temperature controller
ON/OFF switch
Electrical interfaces
125