STIEBEL ELTRON LWZ 130 Bedienung Und Installation Seite 40

OPERATION
Appliance description
3. Appliance description
The appliance draws in outdoor air with a fan. A second fan ex-
tracts stale air from the rooms containing odours or moisture,
e.g. kitchen, bathroom, WC.Extract air and outdoor air are routed
through separate air ducts. Extract air and outdoor air are filtered
by separate filters.
The extract air and outdoor air flow through a cross-countercur-
rent heat exchanger. The outdoor air absorbs heat taken from the
extract air. This enables a large proportion of thermal energy to
be recovered.
The air flow rate is preset for each fan setting by the qualified con-
tractor during commissioning. Constant flow rate control ensures
that the air flow rates through the supply air and extract air fans
are achieved irrespective of the duct pressure.
Operating Description
mode
stage
Humidity prot. Necessary ventilation for ensuring that the building
structure is protected under normal conditions
of use with somewhat
e.g. during temporary absence of users and no dry-
ing of washing in the residential unit.
Stage 1 Reduced ventilation is the ventilation necessary to
1
meet hygiene standards and ensure protection of the
building structure (moisture level) under standard
conditions of use with partially reduced moisture
and pollutant loads, e.g. as a result of intermittent
user absence.
Stage 2 Standard ventilation is the ventilation necessary to
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meet hygiene standards and ensure protection of the
building structure when users are present.
Intensive ven- Intensive
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higher flow rate to reduce load peaks, e.g. for rapid
tilation
ventilation during or after a party. You can switch on
intensive ventilation with the programming unit or
with an optionally connectible external pushbutton.
Time program Time controlled fan program with various adjustable
fan settings.
mode
LWZ 130 Enthalpie, LWZ 130 E-W: Enthalpy heat exchanger
The enthalpy heat exchanger is a highly efficient, moisture-trans-
ferring countercurrent heat exchanger with a selective membrane.
The membrane helps to recover moisture from the extract air and
transfer it to the supply air. This prevents the relative humidity
in the rooms from dropping too low during the winter months.
3.1 Frost protection
The appliance hasa frost protection controller, which ensures that
it works to optimum effect evenat low outside temperatures. Ifthe
outdoor air temperature falls below the selected frost protection
value, the electric preheating coil is switched on. This prevents
the cross-countercurrent heat exchanger from freezing up. When
the preheating coil is active, the "Frost protection" symbol appears
on the display.
40 I I-WZ 130 ll-wz 130 Enthalpie
reduced moisture loads.
ventilation is increased ventilation with
I I-WZ 130 E-W
3.2 Bypass mode
Bypassmode is usually used for passivecooling in summer, when
the outside temperature is lower than the set room temperature.
In bypass mode, cooler outdoor air can displace the warm air in
the home by bypassing the cross-countercurrent heat exchanger.
When the conditions are met for bypass mode, the "bypass mode"
symbol appears.
The appliance does not have a built-in bypassdamper. The appli-
ance checks whether a window
at X18. When the window with the contact switch is open, only
the extract air fan is activated and the supply air fan switches off.
Settings
4.
Switching the appliance on
4.1
Insert the plug of the appliance into a standard safety socket.
4.2 Programming unit
The programming unit enables convenient operation and the dis-
play of system parameters from the living space.
a
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2
3
Text fie ld
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Appliance status symbols
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Touch-Wheel
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"MENU" button
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"0K" button
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4.2.1 Display
If you do not perform any settings for a while, the display illumi-
nation switches off and the home screen appears.
Pressany button to switch the illumination back on again.
contact is connected and activated
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