Internal extensions (accessories)
Internal extension H2
Fig. 60
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