165
A7
Connection adaptor
A8
LON communication module or
cascade communication module
A9
Internal extension (accessories)
S1
ON/OFF switch
S2
Reset button
X... Electrical interfaces
!
Outside temperature sensor
?
Flow temperature sensor, low loss
header
%
Cylinder temperature sensor
(plug on the cable harness)
sÖ
Heating circuit pump or boiler cir-
cuit pump
sA
Circulation pump, optionally:
■ DHW circulation pump
■ External heating circuit pump
■ Circulation pump for cylinder
heating
dG
Gas solenoid valve
fÖ
Power supply
lH
Power supply for accessories and
Vitotrol 100
a-Ö
Fan motor
aYA
Gas pressure switch
aVG
KM BUS
Designs
Connection and wiring diagram – external…
(cont.)
5585 174 GB
Service