178
Fig. 140
A1
Main PCB
A2
Switching mode power supply
A3
Optolink
A4
Burner control unit
A5
Programming unit
A6
Coding card
A7
Connection adaptor
A8
LON communication module (accessories)
A9
Internal H1 extension (standard delivery) or H2
(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 or heating circuit pump
for heating circuit without mixer
dG
Gas solenoid valve
fÖ
Power supply
lH
Switched power outlet
a-Ö
Fan motor
a-Ö
A Fan motor control
aYA
Gas pressure switch
aVG
KM-BUS
Connection and wiring diagram
Connection diagram, external (gas condensing module)
5775 636 GB
Appendix
Summary of Contents for C3TB
Page 136: ...136 Troubleshooting Repairs gas condensing module cont 5775 636 GB Diagnosis ...
Page 143: ...143 Parts lists Heat cell assembly 5775 636 GB Components ...
Page 160: ...160 Parts not shown 0009 PCB IU100 B30 Parts lists Fuel cell assembly 5775 636 GB Components ...
Page 161: ...161 Parts lists Fuel cell assembly cont 5775 636 GB Components ...
Page 187: ...187 5775 636 GB ...