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Installation and Operating Instructions
CHAPTER 4
INSTALLATION
Central ventilation unit – KWL 470 W/W ET
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 store-
room). 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 30 cm must be kept clear above and below
the unit for maintenance work (cf. Fig. 4).
4. An additional 30 cm 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
structure.
7. If an external post-heater is installed, the ventilation duct must be made of non-flammable material at least 0.5 m
before and after the heating element.
4.1.2 Adjust unit to installation conditions
The unit can be adapted to the installation conditions as required. The intake air connection can be installed on the right
or left side.
Upon delivery, the intake air connection is on the right side of the unit (see Fig. 5). The unit must be modified if the intake
air connection should be on the left side of the unit (see Fig. 6).
Intake air connection from right
643
110
206
Extract air
Abluft
ø160
Supply air
Zuluft
Front side
Dimensions in mm
Fig. 5
Wall
643
220
110
206
220
Exhaust air
Fortluft
Fortluft
Abluft
ø160
Intake air
Zuluft
Aussenluft
Aussenluft
235
Kugelsiphon
ø12
10
Intake air connection from left
Wall
643
550
110
220
206
Intake air
Aussenluft
Exhaust air
Fortluft
ø160
Front side
Dimensions in mm
270
235
EN
Fig. 4
Fig. 6
Supply air
Zuluft
Extract air
Abluft
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