Viessmann Vitodens 200 Service Instructions Manual page 103
Type wb2a, 8.8 to 20.0 kw wall mounted gas fired condensing boiler natural gas and lpg version
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Also See for Vitodens 200:
- Technical manual (180 pages) ,
- Installation instructions manual (148 pages) ,
- Service manual (132 pages)
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Connection and wiring diagrams
A3
Optolink
A4
Burner control unit
A5
Programming unit
A6
Coding card
A7
Connection adaptor
A8
LON communication module
(Vitotronic 200)
A9
Internal extension H1 or H2
S1
ON/OFF switch
S2
Reset button
X... Electrical interface
!
Outside temperature sensor
external . . .
(cont.)
?
Flow temperature sensor, low
loss header
%
Cylinder temperature sensor
(plug on the cable harness)
sÖ
Internal circulation pump
dG
Gas solenoid valve
fÖ
Power supply
lH
Power supply accessories and
Vitotrol 100
a-Ö Fan motor
aYA Gas pressure switch
aVG KM BUS
Designs
103
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