Viessmann VITOTRONIC 100 Installation And Service Instructions Manual page 161

Main PCB 230 V~
sÖ
Switching output
or
Primary pump, cylinder storage
system
or
Circulation pump, flue
gas/water heat exchanger
sA
Cylinder primary pump
sL
Shunt or boiler circuit pump
(on site)
fÖ
Power supply, 50 Hz
fA
Oil/gas burner, connection
to DIN 4791
gÖ
Central fault message (on site)
gS
Butterfly valve
or
Constant return
temperature control
or
Mixing valve, cylinder storage
system
lÖ
Burner stage 2/mod.
aBÖ External connections
a External safety equipment
(remove jumper
when connecting safety
equipment)
b External controlled
shutdown
(remove jumper when
connecting
these devices)
c External burner start
(stage 1)
aBA Safety chain 230 V
aBH Power supply for accessories
(cont.)
Connection and wiring diagrams
F1 Fuse for electronics, pumps
and accessories (via
plug aBH)
F2 Fuse for burner
F6 High limit safety
cut−out "E" 120 ºC
(100 or 110 ºC)
F7 Control thermostat "R"
95 ºC
(100 ºC, 110 ºC)
K1−K10 Relays
S1 ON/OFF switch "8"
S2 TEST key
161