Operating instructions

A3 Optolink
A4 Burner control unit
A5 Programming unit
A6 Coding card
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 fired condensing boiler)
or
Comfort sensor (gas fired con-
densing combi boiler)
(plug on the cable harness)
sÖ Internal circulation pump
dG Gas solenoid valve
fÖ Power supply
lH Power supply accessories and
Vitotrol 100
a-Ö Fan motor
a-ÖA Fan motor control
aYA Gas pressure limiter
aVG KM BUS
Connection and wiring diagram – external . . . (cont.)
110
Designs
5692 672 GB