42
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Subject to change due to technical improvements
Heating curve
Heating circuit
Heating curve
The heating curve
The heating curve
controls the fl ow temperature
for the
"Day" and "Night" modes
of the heating
circuit in question.
During a set time slot
, the
heating circuit is in
"Day"
mode.
Outside
the time
slots, the heating circuit is in
"Night"
mode.
Each heating circuit has its own heating curve
,
as underfl oor heating requires different settings to
radiator heating.
The
diagram
shows a
heating curve
for radiator
heating. If the control settings have been adapted
to your system,
lower heating curves
may be
set
for
underfl oor heating
and
higher heating
curves
for
radiator heating
.
0
30
20
10
He
at
in
g
flo
w
te
m
pe
ra
tu
re
(°
C)
-20
-10
-15
80
70
60
50
40
+10
+5
0
-5
+20
+15
Outside temperature (°C)
+3
°C
Wi
nt
er
set
-poi
nt
Tr
an
sit
ion per
iod
set
-poi
nt
Day
Nigh
t
Nig
ht he
at
ing
lim
it
Da
y h
eat
in
g li
mit
Maximum flow temperature
(adjustable with SERVICE permission)
44°C Day
29°C Night
Freezing protection
Maximum fl ow temperature
This limit protects your heating system.
Underfl oor heating is usually limited to 45°C, while
radiators with metal pipes can take temperatures
up to 85°C.
Heating curve "Day"
During a set time slot, the heating circuit is in "Day"
mode. The heating curve for "Day" mode can be
adjusted using the parameters "Flow at -10°C" and
"Flow at +10°C". The control system uses these
parameters to plot a line: the heating curve "Day".
The heating curve "Day" and the current outside
temperature are used to calculate the required fl ow
temperature for the heating circuit. Example:
at +3°C outside temperature => 44°C fl ow
at -5°C outside temperature => 54°C fl ow
If the unit has a room sensor, the calculated
fl ow temperature is corrected. The actual fl ow
temperature may be higher or lower.
Heating curve "Night"
Outside the set time slots, the heating circuit is in
"Night" mode.
The heating curve "Night" is set back from the
heating curve "Day" by the adjustable value "Set-
back". The heating curve "Night" and the current
outside temperature are used to calculate the
required fl ow temperature.
Factory settings for the heating circuit
With
software versions 1.20.0
and higher,
the system confi guration for the heating circuit
offers the user a choice between
underfl oor and
radiator heating
.
This choice pre-sets some of the parameters in
the heating circuit. For information on these
parameters and their
factory settings
, see
Heating curve