Viessmann VITOCAL 300, Installation And Service Instructions Manual

Page: 80 / 160

In addition to the procedure described
under "System configuration" (see
page 47), the system design can also
be amended here or additional com-
ponents and/or functions can be
added or deselected. Access
& " System settings "
& " Program "
& " System definition "
& "System schematic"
The required procedure is described
from page 47.
Language
Adjusting the required language, see
page 79.
Average time; outside temperature
The average outside temperature is
calculated within the selected period.
This average value is, for example,
the basis of the subsequent data for
the heating curve and for defining the
heating period.
Independent of this value, an average
value is formed every 10 min to safe-
guard the frost protection of the sys-
tem. This value remains unchanged
when the "average outside tempera-
ture" changes. Access
& " System settings "
&
" Program "
& " System definition "
&
"Time T outs. average"
(
P
/
Q
)
Standard setting 3:00 h
Setting range 0:10 to
100:0 h
Heating limit < T room (heating limit temperature)
The heating limit temperature defines
the value of the outside temperature,
below which central heating com-
mences. The heating limit temperature is the
result of the selected set room tem-
perature less the value entered under
"
Heat. limit < T room ".
Example:
System design
80
System definition control settings
55
92
901
GB