Viessmann 7838380 Notice De Montage page 17

Additional coding addresses
In conjunction with the new control unit, the following coding addresses can
additionally be set:
Factory set code
16:50 With cyclical calibration, the
boiler is started according to
the heating curve. If the start
point according to the heat-
ing curve is above 50 ºC, the
boiler is started at 50 ºC.
17:42 With urgent calibration, the
boiler is started according to
the heating curve. If the start
point according to the heat-
ing curve is above 42 ºC, the
boiler is started at 42 ºC.
51:0 System with low loss head-
er:
The internal circulation
pump is always started
when there is a heat de-
mand
Possible change
16:30 to The start point for calibration
16:127 can be adjusted from 30 ºC to
127 ºC (limited by boiler-spe-
cific parameters)
17:30 to The start point for calibration
16:127 can be adjusted from 30 ºC to
127 ºC (limited by boiler-spe-
cific parameters)
51:1 System with low loss header:
The internal circulation pump
is only started when there is a
heat demand if the burner is
running.
51:2 System with heating water
buffer cylinder:
The internal circulation pump
is only started when there is a
heat demand if the burner is
running.
GB
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