Viessmann Vitodens 200 Service Instructions Manual page 90
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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Function description
Extensions for external connections . . .
Internal extension H2
The internal extension is integrated
into the control unit housing. The fol-
lowing alternative functions can be
connected to relay output sK. The
function is allocated via coding
address "53":
Central fault message (coding
address "53:0")
DHW circulation pump (coding
address "53:1") (only for weather-
compensated operation)
90
(cont.)
Heating circuit pump for heating cir-
cuit without mixer (coding address
"53:2")
Cylinder primary pump (coding
address "53:3")
An extractor can be switched OFF via
connection aBJ when the burner
starts.
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