Internal Extension H2 - Viessmann Vitodens 200-W Series Installation And Service Instructions Manual

Internal extensions (accessories)

Internal extension H2

Fig. 58
The internal extension is integrated into the control unit
casing. The following alternative functions can be con-
nected to relay output . The function is assigned via
sK
coding address "53" in group "General":
Central fault message (code "53:0")
■
DHW circulation pump (code "53:1") (only for
■
weather-compensated operation)
(cont.)
Heating circuit pump for heating circuit without mixer
■
(code "53:2")
Circulation pump for cylinder heating (code 53:3)
■
An extractor fan can be switched off via connection
when the burner starts.
aBJ
Function description
93