Internal Extensions (Accessories); Internal Extension H1 - Viessmann VITODENS 200-W Installation And Service Instructions Manual

Function description

Internal extensions (accessories)

Internal extension H1

Fig.65
The internal extension is integrated into the control unit
casing. The following alternative functions can be con-
nected to relay output
sK
coding address "53" in group "General":
■ Central fault message (code "53:0")
■ DHW circulation pump (code "53:1") (only for
weather-compensated operation)
110
. The function is assigned via
■ Heating circuit pump for heating circuit without mixer
(code "53:2")
Circulation pump for cylinder heating (code "53:3")
■
An external gas isolation valve can be connected to
connection gD .