OPERATION
Operation
ENGLISH
www.stiebel-eltron.com LWZ 304-404 SOL | 9
Fan output correction (stage 1/2/3) subject to humidity
For output stages 1, 2 and 3, the qualified contractor can activate a
correction subject to humidity. This is made subject to the relative
humidity in the room. At low levels of relative humidity, such as
in winter, for example, the air flow rate will be reduced subject to
the output reduction parameter. This counteracts excessive drying
out. In summer, the humidity-dependent fan output correction can
reduce excessive humidity levels in rooms.
f Please consult your qualified contractor.
4.7.4 Service
RUNTIME FILTER: This parameter indicates when the last filter
reset was carried out.
RESET FILTER: This parameter enables you to carry out a filter
reset by selecting "On".
4.7.5 DHW
Select the set DHW temperatures here. Enter the values for day,
setback, standby and manual modes. Subject to operating mode,
the temperature in the DHW cylinder is brought to the correspond-
ing set value. The current water temperature in the cylinder is
shown under
DHW TEMPERATURE.
The settings in the
PARAMETER submenu are reserved for qual-
ified contractors.
4.7.6 Solar
Note
The
SOLAR
parameter is only displayed if your appliance
is a model from the SOL series.
If you have connected a solar thermal system, you will find all the
parameters here which have to be specified for solar mode. In
solar mode, the appliance is backed up by the solar heat exchang-
er/indirect coil for DHW heating and central heating.
SOLAR ACTIVATION [MENU/SOLAR, P80]: If you want to enable
solar mode, set the value in parameter
SOLAR ACTIVATION to 1.
TEMP. DIFFERENTIAL [MENU/SOLAR, P81]: With the aid of this
parameter, also known as solar differential temperature, you de-
fine a temperature that is used as the threshold for starting and
stopping the solar circuit pump.
The solar circuit pump starts if the collector temperature is higher
than the return temperature by the
TEMP. DIFFERENTIAL +
SOLAR HYSTERESIS. The solar circuit pump stops if the collec-
tor temperature is only
TEMP. DIFFERENTIAL - SOLAR HYS-
TERESIS
above the return temperature. The parameter SOLAR
HYSTERESIS
is set by the qualified contractor.
Ensure that the stop point is not below the return temperature,
which can be the case if the hysteresis has been set above the
temperature differential. The greater the value of the solar differ-
ential temperature, the later the solar circuit pump starts when
the sun comes out. At the same time, the risk of heat loss from
the cylinder is reduced. If heat were lost from the cylinder, the
thermal energy would flow in the opposite direction, i.e. water
that had already been heated would be cooled down because
insolation was still too low.
DHW COMPRESSOR DELAY (delay compressor DHW)
[MENU/SOLAR, P82]
When the solar circuit pump runs, the compressor is blocked for
the period defined here. DHW is only heated with solar energy
during this time.
DHW SOLAR TEMP. (DHW temperature solar)
[MENU/SOLAR, P83]
If the DHW cylinder has been heated up, the set flow temperature
has been reached and the collector temperature remains high,
the DHW cylinder can be heated up to a higher temperature to
store solar energy. Set the temperature to which the DHW cylinder
should be heated here.
WARNING Burns
Parameter DHW SOLAR TEMP. should only be set high-
er than 60°C if suitable measures have been taken to
provide protection against scalding. There is a risk of
scalding at outlet temperatures in excess of 43 °C.
If you want to use the solar function, your contractor should set
the following values:
MINIMUM CYCLES (P54) 1
MAXIMUM CYCLES (P55) ≥ 50
OUTSIDE TEMP MAX CYC (P56) 0 °C
OUTSIDE TEMP MIN CYC (P57) 25 °C
4.7.7 Time/date
In the
TIME / DATE menu, enter the current time and date, so the
system can start the time programs you enter at the correct time.
Entering the date
15.
09 08:23
Day Month Year Hour Minute
Jun
26�04�01�0296
SETTINGS
TIME
TIME / DATE
Position the selection indicator over the position "Year" and con-
firm with
OK. Set the current year with the scroll wheel and con-
firm with
OK. Set the month accordingly. To help you set the day,
a calendar page appears. Move the highlighter to the required day
with the scroll wheel. The new value is saved when you confirm
with OK.
Summertime: Under the parameter
SUMMERTIME MANUAL,
you can set the period for summertime. Alternatively you can
select the summertime specified at the factory. For this, set the
parameter
SUMMERTIME AUTOMATIC to "ON".
296066-38500-9030_LWZ_304-404_SOL_Bedienung_en.indb 9 21.07.2015 12:03:48
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