Internal Extensions Ea1 - Viessmann VITODENS 200-W Service Instructions Manual
Wall-mounted, gas-fired condensing boiler
natural gas and lpg version
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Also See for VITODENS 200-W:
- Installation and service instructions manual (188 pages) ,
- Installation instructions manual (184 pages) ,
- Service instructions manual (150 pages)
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Vitodens 200-W B2HA 112, 150 Service
Internal Extensions EA1
Legend
A1
PCB
F1
Fuse
DE1
Digital input 1
DE2
Digital input 2
DE3
Digital input 3
0 – 10 V
0 - 10 V input
fÖ
Power supply
fÖ
Power supply for additional
accessories
aBJ
Central fault message/
feed pump/DHW recirculation
pump (potential-free)
KM BUS
aVG
Refer to main wiring diagram on page 90.
Function Description
85
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