Internal Extension H2 - Viessmann VITODENS 200-W Service Instructions Manual

Function description
Extensions for external connections...

Internal extension H2

The internal extension is integrated into
the control unit housing. The following
alternative functions can be connected
to relay output sK. The function is allo-
cated via coding address "53":
■ Central fault message (coding
address "53:0")
■ DHW circulation pump (coding
address "53:1") (only for weather-
compensated operation)
92
(cont.)
■ Heating circuit pump for heating circuit
without mixer (coding address "53:2")
■ Circulation pump for cylinder heating
(coding address "53:3")
An extractor can be switched OFF via
connection aBJ when the burner starts.