Operating instructions
2.5 Unit insulation
If installed in heated rooms and higher humidity, condensation can occur on the outside of the unit in the outside and
extract air area. In this case, water-vapour-tight insulation is to be installed on the surface in this area. Furthermore the
outside and exhaust air ductwork should be insulated sufficiently.
If installed in unheated areas (e.g. frost-protected attic), sufficient insulation must be installed on the outside of the unit.
Otherwise, condensate formation could occur on the casing sides. Frost-proof condensate drainage must be installed,
perhaps with a heater.
2.6
Electrical connection
All work must be carried out with the equipment fully isolated from the power supply. The electrical connec-
tions must be carried out in accordance with the relevant wiring diagram and must only be carried by certified
electricians!
The unit is equipped with a main switch and an isolator which can be secured against unauthorized switching with a
U-lock.
The relevant standards, safety regulations (e.g. DIN VDE 0100) and the technical connection conditions of the local
electricity supply companies must be observed. An all-pole mains switch / isolator, with a contact opening of at least 3
mm (VDE 0700 T1 7.12.2 / EN 60335-1) must be provided. The main switch and/or isolator can be secured against
unauthorized switching with a U-lock.
The surface-mounted controller with touchscreen is connected to the unit by means of a 5 m connecting cable (also
available in 10 or 20 m length). The electrical connection of the KWL EC ... D Pro / WW takes place directly in the ter-
minal box. If special components are to be connected, the connections must be made in the terminal box.
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Central ventilation units KWL EC 700/1400/2000 D Pro / WW
Installation and operating instructions
WARNING
UK