Extensions For External Connections (Accessories) - Viessmann Vitopend 200-W Installation And Service Instructions For Contractors

Extensions for external connections (accessories)

Internal extension H1
The internal extension is integrated
into the control unit casing. The fol-
lowing alternative functions can be
connected to relay output sK. The
function is allocated via coding
address "53":
Function description
Central fault message (coding
address "53:0")
Heating circuit pump for heating cir-
cuit without mixer (coding address
"53:2")
An external safety valve can be con-
nected to gD.
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