STIEBEL ELTRON LWZ 404 SOL Operation

OPERATION
Operation
12 | LWZ 304-404 SOL www.stiebel-eltron.com
Generally, values below 50 (recommendation:30) should be se-
lected for heating circuit 1 in order 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 fluctua-
tions 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 circuit2. 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 heat-
ing 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
SETTINGS
HEATINGHEATING CURVE HC1
HEATING CURVE
THK °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)
Heating curve 55/40 for a radiator heating system (set room tem-
perature 20°C, low end 5°C, gradient 0.65, flow proportion 30%,
design temperature -15°C)
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)
Heating curve 35/28 for underfloor heating (set room temperature
20°C, low end 1°C, gradient 0.3, flow proportion 30%, design
temperature -15°C)
0
5
10
15
20
25
30
35
40
-15 -10 -5 0 5 10 15 20
1
3
2
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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 pro-
grams or select the set room temperature with parameter
HOTTER / COLDER.
4.7.11 Programs
If automatic mode is set, this is where you define the time pro-
grams that control the appliance. There are time programs for the
functions central heating, DHW heating and ventilation.
Heating programs: You can set individual heating programs for
heating circuits 1 and 2. This determines when and how often
the appliance should operate in day mode. At all other times, the
appliance operates in setback mode. You can select the set values
for day and setback mode under parameter
ROOM TEMPERA-
TURES
. Below is an explanation of how to define a time program.
First, select the days on which you want to enable the HEATING
function:
+
-
26�04�01�0301
Monday
Mon
SETTINGS
PROGRAMS
HEATING PROGRAM HC1
- on individual days (MONDAY, ..., SUNDAY)
- from Monday to Friday (
MON - FRI)
- on Saturday and Sunday (
SAT - SUN)
- throughout the whole week (
MON - SUN)
Monday is initially offered.
296066-38500-9030_LWZ_304-404_SOL_Bedienung_en.indb 12 21.07.2015 12:03:50

STIEBEL ELTRON LWZ 404 SOL Specifications

General

Brand	STIEBEL ELTRON
Model	LWZ 404 SOL
Category	Fan
Language	English