126
Fig. 97
A1
Main PCB
A2
Power supply unit
A3
Optolink
A4
Burner control unit
A5
Programming unit
A6
Coding card
A7
Connection adaptor
A8
LON communication module (accessories)
A9
Internal H1 or H2 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 cable har-
ness)
sÖ
Internal circulation pump
sK
Cylinder loading pump
dG
Gas solenoid valve
fÖ
Power supply
lH
Power supply for SM1 solar control module,
accessories and Vitotrol 100
a-Ö
Fan motor
a-Ö
A Fan motor control
aYA
Gas pressure switch
aVG
KM BUS
Designs
External connection diagram
5773 238 GB
Service