Chapter 4 Service And Maintenance; Cross Counter Flow Heat Exchanger; Filter Change - Helios KWL EC 270 W R Instructions D'installation Et D'utilisation

Installation and operating instructions
GB
CHAPTER 4
SERVICE AND MAINTENANCE
WARNING
IMPORTANT
IMPORTANT
IMPORTANT
NOTE
Passive house compact units KWL EC 270/370 W R/L
4.0 Service and maintenance
All work must be carried out with the equipment fully isolated from the power supply. Risk of
electric shock, moving parts (fans) and hot surfaces.
4.1

Cross counter flow heat exchanger

Open and remove both upper snap-in hooks on the front cover.
unit using the removal tool (Fig.20). For cleaning, vacuum the fans with a vacuum
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 (Fig. 21). The
☞
removal tool must not cover the sealing element! (Fig.20, Pos.1)
4.2

Filter change

In order to change the filters, open and remove both upper snap-in hooks on front cover.
opening on the front of the compact unit enables easy filter replacement of the outside air, extracted air
and bypass filter (Fig. 20). F7 filters are optional on the supply air and bypass-side (Fig.22).
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 (Fig. 23).
– 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 Bypass filter G4
1 unit Bypass filter F7
The filters are to be checked regularly (see controller display, factory setting every 6 months)
☞
depending on the degree of pollution (risk of mould formation), 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 270/370/4/4
F7 ELF-KWL 270/370/7
ELF-KWL 270/370/4/4 BP
ELF-KWL 270/370/7 BP
10
Remove the heat exchanger from the
cleaner.
The inspection
Order No. 9613
Order No. 9614
Order No. 9617
Order No. 9618