The operating mode changeover
remains active for as long as the con-
tact remains closed, however at least
as long as the duration selected in
coding address "F2".
External blocking
The "External blocking" function is
connected via the external extension
input "
aVD
".
In coding address "32" you can select
the influence the "Ext. blocking" sig-
nal should have on the connected cir-
culation pumps.
External demand
The "External demand" function is
connected via the external extension
input "
aVD
".
In coding address "34" you can select
the influence the "Ext. demand" signal
should have on the connected circula-
tion pumps.
In coding address "9b", you can select
the minimum set boiler water tem-
perature in case of external demand.
Venting program
Note
Close the gas shut-off valve when
operating the venting program.
During the venting program, the circu-
lation pump will be alternately
switched ON and OFF for 30 s respec-
tively over a period of 20 min.
For a certain period, the changeover
valve is alternately set towards heat-
ing mode and DHW heating. The
burner is switched OFF during the
venting program.
The venting program is activated via
coding address "2F:1". The program
is automatically disabled after
20 minutes, and the coding address is
set to "0".
Control functions
(cont.)
101
Function description
5692
569
GB
Содержание Vitodens 300
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