Operating instructions

137
A7 Connection adaptor
A8 LON communication module
(Vitotronic 200)
A9 Internal extension H1 or H2
S1 ON/OFF switch
S2 Reset button
X... Electrical interface
!
Outside temperature sensor
?
Flow temperature sensor, low
loss header
%
Cylinder temperature sensor
(gas condensing boiler)
or
Comfort sensor (gas condensing
combi boiler)
(plug on the cable harness)
sÖ
Internal circulation pump
dG
Gas solenoid valve
fÖ
Power supply [terminals]
lH
Power supply accessories and
Vitotrol 100
a-Ö
Fan motor
a-Ö A
Fan motor control
aYA
Gas pressure limiter
aVG
KM BUS
Designs
Connection and wiring diagram – external…
(cont.)
5692 857 GB