Datasheet

5822 239 GB
44
3.3 Installation notes
Additional connection options
H to Vitotronic 200 (type KW2)
Additional connections to Vitotronic 200
(type KW2) are possible in conjunction
with the switching module V (part no.
7143 513) (see installation instructions
for switching module V).
H
to Vitotronic 300 (type GW2) and Vitotronic 333 (type MW1)
External switch-on subject to load
When the volt-free contact between
terminals ”2” and ”3” at the plug-in
connection aVH closes, the boiler
burner and possibly the burners of
other boilers (via Vitotronic 333) may be
switched on, subject to load.
The boiler w ater temperature is limited
via the maximum set boiler water
temperature or via the mechanical
thermostat.
The set value is adjusted via coding
”9B”.
External blocking or mixer ”close”
The burner is shut down or the mixer is
closed when the volt-free contact
between terminals ”2” and ”3” at the
plug-in connection aVD closes.
The boiler is excluded from the
sequential control, the associated
pumps are switched off and the shut-off
equipment is closed.
Please note:
The frost protection of the boiler or
heating circuit is no longer effective
during the controlled shut-down or
when the mixer ”closes”, i.e. the lower
boiler water temperature and flow
temperatures are no longer being
maintained.
You can pre-select via coding ”99”, to
which circuits input aVD will apply.
Coding ”99”
Burner ”off” Heating circuit 1
(mixer circuit M1)
Heating circuit 2
(mixer circuit M2)
Heating circuit 3
(mixer circuit M3)
”0”
”1” x
”2” x
”3” x x
”4” x
”5” x x
”6” x x
”7” x x x
”8” x
”9” x x
”10” x x
”11” x x x
”12” x x
”13” x x x
”14” x x x
”15” x x x x