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Installation and Operating Instructions
CHAPTER 4
INSTALLATION
Central ventilation unit – KWL 250 W/W ET
3.4
Dimensions
650
85
133 192 157
Abluft
Extract air
ø125
Supply air
Zuluft
Intake air
Außenluft
83
ø125
Zuluft
Supply air
Dimensions in mm
3.5
Accessories
Additional accessories and matching system components are available to expand the KWL
Further information and details on accessories can be found on www.HeliosSelect.de.
4.1
Installation instructions
4.1.1 Positioning
The unit is designed for installation on the wall inside the residential unit or building or for installation in a cabinet. Due
to the operating noise, it is recommended to install the unit in a secondary room (e.g. laundry room, utility room or sto-
reroom). Ensure that there is a waste water connection in the installation area.
The unit and terminal box must be freely accessible for maintenance and installation work. The following minimum clea-
rances to the wall, floor and ceiling must be observed and adhered to (see Fig. 4).
Dimensions in mm
1. The unit may only be installed in frost-free rooms because there is a risk of freezing. The room temperature must not
fall below +5 °C.
2. In case of installation in heated rooms and rooms with higher air humidity, condensate may form on the outside of the
unit in the area of the intake air and exhaust air ducts. In this case, vapour diffusion-tight insulation must be applied
to the outside of the piping. The minimum insulation thickness pursuant to DIN 1946-6 must be observed.
3. There must be sufficient space to allow easy access to the unit. At least 300 mm must be kept clear above and
below the unit for maintenance work (cf. Fig. 4).
4. An additional 300 mm space must be kept clear on the unit side for the installation of the external terminal box (cf.
Fig. 4).
5. In order to ensure safe condensate drainage, the unit must be mounted so that the bottom edge is at least 300 mm
above the ground (cf. Fig. 4).
6. In order to prevent sound transmissions, there must be suitable on-site sound decoupling depending on the building
Fortluft
Exhaust air
Ball siphon
Kugelsiphon
ø12
253
8
Fig. 3
392
253
195
system.
®
Fig. 4
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