Internal Extensions Ea1 - Viessmann VITODENS 222-F Service Instructions Manual
Floor mounted, gas-fired condensing storage combi boiler
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Also See for VITODENS 222-F:
- Installation and service instructions manual (172 pages) ,
- Installation and service instructions for contractors (156 pages) ,
- Technical manual (156 pages)
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Troubleshooting
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
A Power supply for additional
accessories
aBJ
Central fault message/
feed pump/DHW circulation
pump (potential-free)
KM BUS
aVG
86
Vitodens 222-F B2TA 19 and 35 Service
Refer to main wiring diagram on page 90.
- Quick Links:
- Parts
- Fault Codes
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