135
Fig. 94
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
sA
Cylinder loading pump
sK
DHW circulation pump
dG
Gas solenoid valve
fÖ
Power supply
lH
Power supply for accessories and Vitotrol 100
a-Ö
Fan motor
a-Ö
A Fan motor control
aYA
Gas pressure switch
aVG
KM BUS
Connection and wiring diagram
External connection diagram
5773 216 GB
Appendix
Summary of Contents for B2TA
Page 101: ...101 Parts lists Overview of assemblies 5773 216 GB Components ...
Page 107: ...107 Parts lists Hydraulics 5773 216 GB Components ...
Page 118: ...118 0004 0002 0005 0006 0001 0003 Fig 77 Parts lists Miscellaneous 5773 216 GB Components ...
Page 142: ...142 5773 216 GB ...
Page 143: ...143 5773 216 GB ...