120
■ 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
.
Internal extension H2
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)
■ Heating circuit pump for heating circuit
without mixer (coding address "53:2")
■ Circulation pump for cylinder heating
(coding address "53:3")
An extractor can be switched OFF via
connection
aBJ
when the burner starts.
Function description
Internal extensions (accessories)
(cont.)
5692 843 GB
Summary of Contents for Vitodens 200 WB2C 45
Page 147: ...147 5692 843 GB...
