114
Internal extension H2
Fig. 84
The internal extension is integrated into the control unit
enclosure. The following alternative functions can be
connected to relay output
sK
. The function is assigned
via coding address "53" in group
"General"
:
■
Central fault message (code "53:0")
■
DHW circulation pump (code "53:1") (only for
weather-compensated operation)
Connect DHW circulation pumps with standalone
functions directly to the 230 V
∼
supply
■
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
aBJ
when the burner starts.
Function description
Internal extensions (accessories)
(cont.)
5773 238 GB
Functions