BA-REF_EC 5.5
– 02/2014
English
EN-6/12
5.2.
Roof Fans with Built-In EC Motor
5.2.1.
RDA 21-....-EC
Fig 5-1:
RDA 21
Roof fan with EC technology including associated control unit, prewired for
infinite adjustment of output.
5.2.2
RDA 31-....-EC / RDA 32-....-EC
Fig 5-2:
RDA 31
Fig 5-3:
RDA 32
Roof fan with EC technology including associated control unit, prewired for
infinite adjustment of output.
Function
Minimum and maximum speed to be set as well as a floating fault
contact
Realisation option for night-time reduction of preset values
Option for night-time reduction
To realise a night-time reduction, the desired height target value must be first
be set at the rotary potentiometer Nmin of electronic controller EKE 05-0018-
5E-IA / EKE 05-0040-5E-IA. A floating contact (clock timer, relay, switch) can
then be used to switch off or on the day setpoint (0...5V or 0...10V input) set
in the terminal box of the fan.
5.3
Motor Protection
5.3.1.
Series RDA-EC
The motors have no direct temperature monitoring through thermal contacts
or thermistors. The motor is protected via the current monitoring in the
electronic controller.
5.4.
External Control Unit EKE 05 for Electronically Controlled
Motors (RDA 31-/32-….-EC)
5.4.1.
Execution
Fig 5-4:
EKE 05-0018-5E-IA
Single phase electronic controller with variable output voltage and frequency
optimally coordinated to the operation of roof fans with EC motors. With the
use of modern power semiconductors, speed settings with high efficiency
can be achieved. The output voltage is emitted with high clock frequency (15
kHz).
5.4.2.
Performance Characteristics
Exclusively suited for the operation of Nicotra Gebhardt EC motors
Single phase AC voltage mains connection
Electrical motor output: 370W (EKE05-0018-5E)
or 930W (EKE05-0040-5E)
Permitted ambient temperature during operations from -10°C to + 40°C
Adjustable minimum and maximum speed (option for night-time
reduction)