STIEBEL ELTRON LWZ 404 SOL User Manual

OPERATION
Operation
www.stiebel-eltron.com LWZ304-404 SOL | 13
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”.
 STANDARD SETTING
These parameters are reserved for qualified contractors and are
described in the installation instructions.
 VENTILATION
Here, you can set the parameters for the centralised ventilation
of your home.
 VENTILATION STAGES
 DAY STAGE
 NIGHT STAGE
 STANDBY STAGE
 PARTY STAGE
 MANUAL STAGE
 TIME
 UNSCHED. VENT TIME STAGE 0
 UNSCHED. VENT TIME STAGE 1
 UNSCHED. VENT TIME STAGE 2
 UNSCHED. VENT TIME STAGE 3
 VENTILATION STAGES
The fans can run in three different stages.
Stage
Ventilation for
humidity pro-
tection
0 Necessary ventilation for ensuring that the building
structure is protected under normal conditions of use
with somewhat reduced moisture loads, e.g. during
temporary absence of users and no drying of washing
in the residential unit.
Reduced venti-
lation
1 Ventilation necessary to meet minimum hygiene
standards and ensure protection of the building struc-
ture (humidity) under normal conditions of use with
partially reduced humidity and pollutant loads, e.g. as
a result of intermittent user absence.
Standard ven-
tilation
2 Ventilation necessary to meet hygiene standards and
ensure protection of the building structure when users
are present (standard mode).
Intensive ven-
tilation
3 Ventilation necessary from time to time, with a higher
air flow rate to reduce load peaks. For intensive ven-
tilation, it can be assumed that the user will assist (by
manually opening windows for a time).
 TIME
Normally, the appliance controls when and for how long to venti-
late. However, via the quick access option “VENTILATION STAGES”
you can run ventilation outside the normal schedule.
Under “UNSCHED. VENT TIMESTAGE 1” determine for how many
minutes the fan should run, if you set the appliance to stage1 via
parameter “VENTILATION STAGES”. You can set values between
0 and 1000 minutes in five-minute steps. Specify the ventilation
times for stages 0, 2 and 3 accordingly.
The selected ventilation stage will not be enabled for 20 seconds.
Quick ventilation with external pushbutton
With an external pushbutton that can be installed on site, you
can set ventilation immediately to stage3. Ventilation runs with
stage 3 and will only switch off after the time set in parameter
“UNSCHED. VENT TIMESTAGE 3”.
Humidity protection ventilation (stage 0)
The control unit includes a humidity protection ventilation func-
tion. This is provided to protect against humidity damage, if ven-
tilation is not required. This could be, for example, during pro-
longed absence due to holidays. For this, in the “VENTILATION/
PARAMETER” menu, the humidity protection parameter must be
set to “ON”. The humidity protection ventilation is activated after
a pause of 24 hours. Ventilation is inactive prior to the expiry of
the 24 hour period.
Ventilation starts if the relative humidity inside the room exceeds
a limit whilst ventilation is switched off (stage 0). Ventilation is
switched off again if the limit is undershot by more than the select-
ed hysteresis. The limit is dependent on the outside temperature.
 Please consult your qualified contractor.
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.
 Please consult your qualified contractor.
 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”.
 COOLING
The digital remote control FESComfort is equipped with a temper-
ature sensor as well as a humidity sensor that is used to monitor
the dew point in area heating systems (such as underfloor heating
systems, wall area heating systems, chilled ceilings).
Active cooling
If the heating circuit temperature is greater than the set heating
circuit temperature, and the “COOLING MODE” parameter is en-
abled, the compressor and defrost valve switch on and the hy-
draulics are controlled externally. For cooling mode to function
via area heating systems, cooling thermostats and control valves
must be used and connected to the “Kühl” port in the appliance
control panel.
Cooling and DHW heating
Cooling mode is interrupted as soon as a DHW demand is issued,
and DHW heating commences.

STIEBEL ELTRON LWZ 404 SOL Specifications

General

Brand	STIEBEL ELTRON
Model	LWZ 404 SOL
Category	Fan
Language	English