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 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)
94
Heating circuit pump for a heating
circuit without mixer (coding
address "53:2")
Cylinder primary pump (coding
address "53:3")
An external safety valve can be con-
nected to gD.