Operating instructions

161
A7 Connection adaptor
A8 LON communication module
(Vitotronic 200)
A9 Internal extension H1 or H2
(accessories)
S1 ON/OFF switch
S2 Reset button
X... Electrical interface
!
Outside temperature sensor
?
Flow temperature sensor, low
loss header
%
Cylinder temperature sensor
(type B2HA)
or
Comfort sensor (type B2KA)
(plug on the cable harness)
sÖ
Internal circulation pump
dG
Gas solenoid valve
fÖ
Power supply
lH
Power supply for accessories
and Vitotrol 100
a-Ö
Fan motor
a-Ö A
Fan motor control
aYA
Gas pressure switch
aVG
KM BUS
Designs
Connection and wiring diagram – External…
(cont.)
5772 909 GB
Service