141
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 the
"General"
group:
■
Central fault message (code "53:0")
■
DHW circulation pump (code "53:1")
■
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.
External extensions (accessories)
AM1 extension
Fig. 87
A1
Circulation pump
A2
Circulation pump
fÖ
Power supply
fÖ
A Power supply for additional accessories
aVG
KM-BUS
Functions
One of the following circulation pumps can be connec-
ted to each of the connections A1 and A2:
■
Heating circuit pump for heating circuit without mixer
■
Circulation pump for cylinder heating
■
DHW circulation pump
Select the output functions via codes in the heat gen-
erator control unit.
Function description
Internal extensions (accessories)
(cont.)
5678 044 GB
Functions
Summary of Contents for D2RA
Page 113: ...113 Maintenance Checking the Vitotronic 200 H accessories cont 5678 044 GB Maintenance ...
Page 133: ...133 Parts lists Sorption module hydraulics cont 5678 044 GB Components ...
Page 136: ...136 0001 0002 0003 0004 0005 Fig 83 Parts lists Miscellaneous 5678 044 GB Components ...
Page 163: ...163 5678 044 GB ...