Extensions For External Connections (Accessories) - Viessmann VITODENS 200-W Service Instructions Manual

Function description

Extensions for external connections (accessories)

Internal extension H1
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)
94
■ Heating circuit pump for a heating cir-
cuit without mixer (coding address
"53:2")
■ Circulation pump for cylinder heating
(coding address "53:3")
An external safety valve can be connec-
ted to gD.