– Electrical parameters
The motor rating plate provides information on the electrical data. These data are to be examined for its conformity to
the local conditions.
– Motor
Energy saving, speed controllable (control voltage 0-10 V) EC-external rotor motor with highest efficiency, protection to
IP 44. With ball bearings, maintenance-free and radio suppressed.
1.10 Impellers
The EC-centrifugal roof fans have backwards curved high-efficient centrifugal impellers made from galvanised sheet
steel. The impeller and the motor as one unity are dynamically balanced to quality standard G 6.3 – DIN ISO 1940 T.1.
1.11 Sound level
The sound levels stated in the catalogue can differ considerably after installation as the sound pressure level depends
on the absorption capacity of the room, the place of installation and other factors. Sound reduction is possible by using
sound attenuators and by speed regulation.
1.12 Safety
- A certified electrician may only carry out all servicing and installations.
- The fans may be operated only with the rated voltage indicated on the type plate.
- Technical data on type plate are to be adhered to without fail.
- The degree of protection given on the type plate is only valid with designed installation in accordance
with these installation and operating instructions and with closed aggregate.
1.13 Electrical connection
All work must be carried out with the equipment fully isolated from the power supply. The electrical connec
tion is to be carried out in accordance with the relevant wiring diagram and is only to be done by a certified
electrician. The electrical connection must be fully isolated from the supply up to the final assembly!
All relevant safety regulation, national standards and norms are to be adhered to. An appliance is required for cut off
from the supply with a minimum of 3 mm contact opening of each pole. The rated voltage and frequency must corre-
spond with the data on the type plate. The standard terminal box is located under the cowl (protection to IP 55).
1.14 Protection against accidental contact
When installing observe the valid regulations for labour protection and accident prevention! A protection
against accidental contact according to DIN EN ISO 13857 is to be guaranteed.
Any contact with rotating parts
must be avoided. Make sure that no textiles or other materials (such as clothing) which could be sucked in are close to
the suction area of the fan.
We emphasize that the installer will be held responsible for accidents occurring as a result of missing protection devi
ces.
1.15 Air flow direction and direction of rotation
The EC-centrifugal roof fans have a fixed direction of rotation, i.e. they are not reversible. An arrow on the units indica-
tes the direction.
1.16 Speed control
– with speed potentiometer PU/A
For stepless and direct control or nominal value preset of EC-fans with potentiometer input. Additionally equipped with
an enabling switch. The potentiometer is attached directly to the potentiometer input of the fan control. This has there-
fore a potentiometer supply of e.g. 10 V DC and an input control signal of 0-10 V DC.
Basic scheme:
Example: Stepless speed control
EC-Centrifugal-Roof fan RDW EC ..
Installation and Operating Instructions
WARNING
2
UK
ATTENTION
Fig.1
ATTENTION
