Chapter 3 Service And Maintenance; Cross Counter Flow Heat Exchanger; Filter Change - Helios KWL EC 300 W R/L Montage- Und Betriebsvorschrift

Installation and operating instructions
GB
CHAPTER 3
SERVICE AND MAINTENANCE
WARNING
ATTENTION
IMPORTANT
IMPORTANT
NOTE
Compact wall-mounted units KWL EC 200/300 W R/L
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

Cross counter flow 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 heat exchanger from the unit (Fig.26). In order to
clean, vacuum the blades with a vacuum cleaner or rinse with warm water.
Do not use 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 is also
optionally available.
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:
2 units Spare filter Course G4
1 unit Spare filter Fine
2 units Course filter Course G4
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!
ELF-KWL 200/300/4/4
F7 ELF-KWL 200/300/7
ELF-KWL 300/4/4/7
10
Order No. 0021
Order No. 0038
Order No. 0020