Chapter 4. Service And Maintenance; Service And Maintenance; Enthalpy Heat Exchanger; Filter Change - Helios KWL EC 270 W ET R Montage- Und Betriebsvorschrift

Installation and Operating Instructions
EN
CHAPTER 4
SERVICE AND
MAINTENANCE
WARNING
IMPORTANT
IMPORTANT
IMPORTANT
NOTE
Passive house compact units KWL EC 270/370 W ET R/L
4.0

Service and maintenance

The unit must be fully isolated from the power supply before all maintenance and installation work or befo-
re opening the terminal compartment! Risk of electric shock, moving parts (fans) and hot surfaces.
4.1

Enthalpy heat exchanger

Open and remove both upper snap-in hooks on the front cover. Remove the enthalpy heat exchanger from the unit
using the removal tool (Fig.20). For cleaning, vacuum the fans with a vacuum cleaner.
Do not use water or aggressive cleaning products!
When installing, insert the enthalpy 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)
Removal tool
Pos.1
4.2

Filter change

In order to change the filters, open and remove both upper snap-in hooks on front cover. The inspection 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 sho-
wn on the unit label (Fig.23).
Bypass filter
Extract air filter
Outside air filter
– 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 pcs. Spare filter Course G4
1 pc. Spare filter Fine F7
2 pcs. Bypass filterG4
1 pc. 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 maxi-
mum 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.20
Fig.22
F7 bypass filter
F7 supply air filter
ELF-KWL 270/370/4/4
ELF-KWL 270/370/7
ELF-KWL 270/370/4/4 BP
ELF-KWL 270/370/7 BP
10
Fig.21
Fig.23
Label
Ref. no. 9613
Ref. no. 9614
Ref. no. 617
Ref. no. 9618