Viessmann VITOCAL 300, Installation And Service Instructions Manual

Page: 81 / 160

The selected set room temperature is
20 °C, the value entered under "
Heat.
limit < T room " is 4.0 K.
Central heating commences if the
average outside temperature drops
below 16 °C (heating limit tempera-
ture).
If the outside temperature exceeds
18 °C, central heating is adjusted
because of the specified hysteresis of
2 K.
A
Set room temperature
B
Outside temperature
C
Selected value " Heat. limit < T
room "
D
Heating OFF
E
Heating ON
Access
& " System settings "
& " Program "
& " System definition "
& "Heat. limit < T room"
(
1
/
!
)
Standard setting 4 K
Setting range 0 to 20 K
Temperature limit for reduced temperature mode
The "reduced" temperature mode
(see operating instructions, "setting
switching times") will no longer be
used, if the average outside tempera-
ture falls
below the temperature limit
selected here. The device heats up to
the temperature selected for "stan-
dard" mode.
Operation will continue in accordance
with the selected switching times, if
the average outside temperature
stays
above this temperature limit.
Note
The standard setting of
–
30 °C means
that this function is disabled.
Access
&
" System settings "
&
" Program "
&
" System definition "
&
"Red. mode T thresh
’
d"
(
1
/
!
)
Heating limit < T room (heating limit temperature)
(cont.)
81
System definition control settings
55
92
901
GB
Service