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Installation and Operating Instructions
EN
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WARNING
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WARNING
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ATTENTION
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DANGER
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WARNING
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WARNING
Central ventilation unit – KWL 250 W/W ET
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Risk of injury due to the panel or unit door falling down!
The panel or unit door can fall down when removing and cause serious injuries.
> Wear protective footwear.
> Carefully remove the unit cover or rear panel with both hands.
1. Unhook the panel (magnetic) upwards.
2. Loosen and remove the screws in the unit door.
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Risk of injury due to the high weight of the heat exchanger!
The heat exchanger can fall down and cause serious injuries when removed from the unit.
> Wear protective footwear.
> Carefully remove the heat exchanger from the unit with both hands.
3. Remove heat exchanger.
Damage to the unit due to the use of aggressive cleaning agents.
Aggressive cleaning agents can damage the unit.
> Do not use aggressive cleaning agents.
4. Remove dirt with a damp cloth and a small amount of washing-up liquid.
9.2
Filter maintenance and cleaning
9.2.1 Filter maintenance
The filters must be checked for contamination and dirt (visual inspection) and, if necessary, replaced, see section chap-
ter 9.2.2 „Filter replacement", page 27 as needed or at least every 6 months.
The maximum service life of the filters is 1 year. The filters must then be replaced.
9.2.2 Filter replacement
The need to change the filters is displayed:
– via the easyControls 3.0 software by the symbol
– via the control element KWL-BE Touch by the symbol
– via the control element KWL-BE Eco by the LED lighting up.
The arrangement of the air filters can be found on the unit label. When installing the filter, the air direction according to
the unit label must be observed, which is indicated by arrows on the filters.
Proceed as follows to replace the filters:
1. Unhook panel (magnetic) upwards and remove filter
cover (foam part).
2. Pull filter to the front and replace (see Fig. 36).
3. Confirm the filter replacement:
– enter the filter replacement date and confirm via the
easyControls 3.0 software in the menu "Home-
page"> "Filter replacement".
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– confirm with
via the control element KWL-BE
Touch.
– the filter replacement can be confirmed via the slide
switch control element KWL-BE Eco. For this pur-
pose, switch through all operating stages 4x within
one second (up–down–up–down).
The unit is equipped with filters ISO Coarse 65 % on the
intake air and extract air sides as standard.
The filters are available as accessories:
Replacement air filter Course filter Coarse 65 %/G4 (2 pcs)
Replacement air filter Fine filter ePM1 50 %/F7 (1 pc.)
Replacement air filter activated carbon filter (1 pc.)
The filters can be ordered at www.Ersatzluftfilter.de
9.3
Heat exchanger maintenance and cleaning
9.3.1 Heat exchanger maintenance
The heat exchanger must be checked for contamination and dirt (visual inspection) and, if necessary, cleaned, see
chapter 9.3.2 „Heat exchanger cleaning", page 27.
9.3.2 Heat exchanger cleaning
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Danger to life due to electric shock
An electric shock can result in death or serious injuries.
> Before opening the unit, the unit must be fully isolated from the power supply.
> The unit may only be opened by an authorised electrician.
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Risk of burns due to hot surfaces!
Hot surfaces can cause serious burns.
> Allow unit to cool down for at least 5 minutes or wait until the fans are turned off.
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Risk of injury due to rotating fans!
Rotating fans can injure limbs and cause serious injuries.
> Before working on the unit, wait until the fans are turned off.
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ELF-KWL 250/2xCoarse 65%
ELF-KWL 250/ePM1 50%
ELF-KWL 250/AK
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Fig. 36
Ref. no. 40151
Ref. no. 40152
Ref. no. 40153
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