w LWZ 5-8 CS Premium / 11
FLOW PROPORTION
Flow means the pipework that supplies hot water to the heating
system. The return carries the cooled water from the heating sys-
tem to the heating system. With the „FLOW PROPORTION“ para-
meter you determine whether your heating system should function
as a flow or return temperature-controlled system.
0 Return temperature control 0 100
30 30 70
50 50 50
80 80 20
100 Flow temperature control 100 0
You should normally set values below 50 (we recommend 30) for
heating circuit 1, to restrict the influence of the flow temperature.
Particularly in spring and autumn, the flow temperature is subject
to naturally strong fluctuations because of the heat pump being
switched on and off. If these strong fluctuations make it necessary,
the booster stages would also be started, although the heat pump
alone would be capable of covering the current heat demand.
No flow proportion is scanned for heating circuit2. Always enter
100 here, as the mixer circuit does not have its own return sensor.
MIN. SET VALUE/ MAX. SET VALUE
With these parameters, you set the minimum and maximum set
temperatures for the heating circuit. These values limit the hea-
ting curve in the upper and lower regions. Even if the calculated
heating curve would go beyond these limits, it is limited to these
set values.
HEATING CURVE
Under this parameter, you can display the heating curves for both
heating circuits.
60
40
50
30
20
10
00
-25 -20 -15 -10 -05 00 05 10 15 20 25
26�04�01�0348
MAIN MENU
HEATINGHEATING CURVE HC1
HEATING CURVE
HC TEMPERATURE °C
TA
°C
Note that parameter „FLOW PROPORTION“ has an influence on
heating curve „HC1“. This means the heating curve is distinctly
lower than the flow temperature curve. (see examples 1 and 2).
The heating curve for „HC2“ is a flow temperature curve.
Example 1
Heating curve 55 / 40 , Radiator heating system
Set room temperature °C 20
Low end °C 5
Gradient
0.65
Flow proportion % 30
Design temperature °C -15
0
10
20
30
40
50
60
-15 -10 -5 0 5 10 15 20
1
3
2
26�04�01�0379
X Outside temperature [°C]
Y Heating temperature [°C]
1 Flow
2 Heating curve
3 Return
Example 2
Heating curve 35 / 28 , Underfloor heating
Set room temperature °C 20
Low end °C 1
Gradient
0.3
Flow proportion % 30
Design temperature °C -15
0
5
10
15
20
25
30
35
40
-15 -10 -5 0 5 10 15 20
1
3
2
26�04�01�0380
X Outside temperature [°C]
Y Heating temperature [°C]
1 Flow
2 Heating curve
3 Return
If you have set the heating curve successfully, set the thermostatic
valves to the required temperature.
Note
Never reduce the temperature in the entire building by
closing all thermostatic valves. Instead, use the night
programs or select the set room temperature with the
"HOTTER/ COLDER" parameter.
STANDARD SETTING
These parameters are reserved for qualified contractors and are
described in the installation instructions.
DHW
DHW TEMPERATURES
DHW SET DAY
DHW SET NIGHT
DHW SET STANDBY
DHW SET MANUAL
DHW TEMPERATURE
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