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Installation and Operating Instructions
EN
CHAPTER 8
SERVICE AND
MAINTENANCE
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WARNING
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WARNING
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WARNING
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WARNING
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ATTENTION
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WARNING
Central ventilation unit – KWL 500 W/W ET
8.1
Unit maintenance
The unit must be checked for contamination and dirt (visual inspection) as needed or at least every year.
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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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Risk of injury due to the unit door falling down!
The unit door can fall down when removing and cause serious injuries.
> Wear protective footwear.
> Carefully remove the unit door with both hands.
1. Open both upper snap-in hooks on the unit door.
2. Remove 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.
Remove dirt with a damp cloth and a small amount of washing-up liquid.
8.2
Filter maintenance and replacement
8.2.1 Filter maintenance
The filters must be checked for contamination and dirt (visual inspection) and, if necessary, replaced, see chapter 8.2.2
„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.
8.2.2 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 flashing LED.
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. Open both upper snap-in hooks on the unit door and
remove the unit door.
2. Pull intake air filter
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and extract air filter
and replace (see Fig. 49).
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 cannot be confirmed via the
control element KWL-BE Eco.
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 Coarse filter Coarse 65 % (2 pcs.) ELF-KWL 500/4/4
Replacement air filter Fine filter ePM 1 50 % (1 pc.)
Replacement air filter Activ. carbon ePM 2.5 60 % (1 pc.) ELF-KWL 500 AK
The filters can be ordered at www.Ersatzluftfilter.de
8.3
Heat exchanger maintenance and cleaning
8.3.1 Heat exchanger maintenance
The heat exchanger must be checked for contamination and dirt (visual inspection) and, if necessary, cleaned, see
chapter 8.3.2 „Heat exchanger cleaning", page 27.
8.3.2 Heat exchanger cleaning
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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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.
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.
ù
to the front
ELF-KWL 500/7
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Fig. 49
ù
ò
ò
Ref. no. 00039
Ref. no. 00042
Ref. no. 04199
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