Chapter 3 Service And Maintenance; Cleaning The Cross Counter Flow Heat Exchanger; Filter Change - Helios KWL EC 220 D R Instructions D'installation Et D'utilisation

Installation and operating instructions
GB
CHAPTER 3
SERVICE AND MAINTENANCE
WARNING
ATTENTION
IMPORTANT
NOTE
Compact ceiling-mounted units KWL EC 220/340 D
3.0 Service and maintenance
All work must be carried out with the equipment fully isolated from the power supply!
– 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

Cleaning the cross counter flow heat exchanger

Loosen and remove the four star handle screws on the front cover. Remove sealing strip (Fig.30).
Pull the cross counter flow heat exchanger from the unit (Fig.31).
In order to clean the exchanger, vacuum the blades with a brush nozzle and a vacuum cleaner.
☞
The blades must not be damaged in the process!
Do not use water or aggressive cleaning agents!
3.2

Filter change

In order to change the filter, Loosen and remove the four star handle screws on the front cover. The large
inspection opening on the front of the compact unit enables easy filter replacement for outside air and
extracted air filters (Fig.32/33). Supply air F7 filters (accessories) are optional.
When using F7 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 air/extract air:
Spare filter Course G4
Spare filter Fine/pollen F7
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!
TIP! Helios replacement filters are also available online at: www.ersatzluftfilter.de
2 units ELF-KWL 220 D/4/4
1 unit ELF-KWL 220 D/7
10
Order No. 9638
Order No. 9639