External Connection Diagram - Viessmann Vitodens 242-F Installation And Service Instructions Manual

Designs

External connection diagram

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
!
126
Flow temperature sensor, low loss header
?
Cylinder temperature sensor (plug on cable har-
%
ness)
Internal circulation pump
sÖ
Cylinder loading pump
sK
dG Gas solenoid valve
Power supply
fÖ
Power supply for SM1 solar control module,
lH
accessories and Vitotrol 100
Fan motor
a-Ö
A Fan motor control
a-Ö
Gas pressure switch
aYA
KM BUS
aVG