Service And Maintenance; Enthalpy Heat Exchanger; Filter Change - Helios WL EC 200 W ET R/L Installation And Operating Instructions Manual

Installation and Operating Instructions
EN
CHAPTER 3
SERVICE AND
MAINTENANCE
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WARNING
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ATTENTION
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IMPORTANT
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NOTE
Compact wall-mounted units KWL EC 200/300 W ET R/L
3 .0

Service and maintenance

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The unit must be fully isolated from the power supply before any maintenance and installation work or
before opening the terminal compartment!
– Allow the unit to cool down or wait for five minutes until the fans have turned off .
– Risk of electric shock, moving parts (fans) and hot surfaces .
3 .1

Enthalpy heat exchanger

Open and remove both upper snap-in hooks on the front cover (Fig.27). Pull out terminal strip from the heat exchanger
(Fig.25). Then carefully remove the enthalpy heat exchanger from the unit (Fig.26). In order to clean, vacuum the blades
with a single nozzle and vacuum cleaner.
Do not use water or aggressive cleaning products!
When installing, insert the heat exchanger into the guide rails and slide in up to the stop. Ensure that the rubber lips are
not damaged by mounting! Then re-insert terminal strip.
3 .2

Filter change

In order to change the filters, open and remove both upper snap-in hooks on front cover (Fig.27). Then remove the outside
air and extract air filter from the metal rails (Fig. 28). A F7 pollen filter or activated carbon filter is also optionally available.
When using F7 filters/activated carbon filters, pay attention on air flow direction arrows on the filter labels! The
air flow direction is shown on the unit label .
– Filter
The KWL compact unit is equipped with outside and extract air filter class G4 as standard (to DIN EN 13779):
• Outside/extract air:
2 pcs. Spare filter Course G4
1 pc. Spare filter Fine F7
2 pc. Course filter G4/1 pc. Fine filter F7
1 pc. Activated carbon filter (instead of F7 filter) ELF-KWL 200/300 AK
The filters are to be checked regularly (see controller display, factory setting every 6 months) depending on
the degree of pollution, to be cleaned if necessary . By vacuuming once or after a maximum of 1-year operation
they must be replaced for hygienic reasons .
If the filters should be moist or mouldy, they must be changed immediately!
Fig .25
Fig .27
Snap-in hooks
ELF-KWL 200/300/4/4
ELF-KWL 200/300/7
ELF-KWL 300/4/4/7
10
G4 extract air filter G4 outside air filter
Ref . no . 0021
Ref . no . 0038
Ref . no . 0020
Ref . no . 4198
Fig .26
Fig .28