Operation; Functional Description Rr Ec; Wiring Diagram Overview; Principle Diagrams - Helios Rr Ec-Serie Montage- Und Betriebsvorschrift

Installation and Operating Instructions
m
WARNING
n
CHAPTER 7
FUNCTION FOR
INSTALLER
m
CAUTION
NOTE
NOTE
RR EC 100
RR EC 125
RR EC 160
RR EC 200 A
RR EC 200 B
RR EC 250 A
RR EC 250 B
RR EC 315 A
RR EC 315 B
Centrifugal In-line EC Duct Fans – RR EC
– When the impeller is turned by hand, there will be slight resistance due to the permanent magnets.
This is for technical reasons and it is not a malfunction.
– Compare power consumption to rating plate data
– Check protective conductor connection
If a residual current device is installed in the supply line of the EC fan, the residual current device must have
the following technical features:
Type A or B with a rated differential current of 30 mA.
The EC fan has a leakage current of <= 3.5 mA, calculated according to DIN EN 50178 image 4.
6�5

Operation

In order to ensure the proper functioning of the fan, the following must be checked regularly:
– Formation of dust or dirt deposits in the casing or on the motor and impeller
– Freewheeling of impeller. Wear protective gloves when checking freewheeling of impeller!
– Occurrence of excessive vibration and noise
If excessive vibration or noise occurs, maintenance must be carried out according to the instructions in CHAPTER 8.
7�1

Functional description RR EC

The scope of delivery includes an internal potentiometer in the terminal box with which any fan speed between min.
and max. speed can be set. For an external speed setting with a 0-10 V control signal, the internal potentiometer must
be removed. The centrifugal in-line fans RR EC are steplessly speed-controllable by means of 0-10 V control voltage.
Suitable potentiometers (Type PU/A 10; SS-980-1), three-step switches (Type SU/A) are offered in the Helios accesso-
ries range. Stepless speed control is possible with the universal controller (Type EUR EC; SS-1275). Alternatively, the
electronic differential pressure/temperature controller EDR / ETR can be used.
CAUTION!
m
A minimum speed/voltage, which also depends on on-site resistances, wind pressure, etc�, must be observed
for sufficient motor cooling and ensuring proper functioning�
The use of other brands, especially other electronic devices, can lead to malfunctioning and even destruction of the
controller or fan. Controllers which have not been cleared by Helios are not liable for warranty and guarantee claims.
Activation / deactivation:
Frequent switching on and off of EC fans can be carried out via the 0-10 V control input by switching off the control
signal to 0 V. This applies to operation with an external potentiometer or external 0-10 V signal from the building
management system. Switching off is alternatively also possible via a release input, depending on the type. This is
gentle on the electronics and ensures a long service life. If this is not easy to realise, e.g. when operating with an internal
potentiometer, it can also be done by switching off the mains supply. In general, a time interval of at least 120 seconds
must be observed when switching the mains off/on.
Controlling multiple EC fans with a potentiometer
In order to control multiple EC fans above the setpoint input "0-10 V", the 10 V DC voltage source must supply the
sum of all setpoint input load currents.
m
The parallel switching of +10 V DC power supplies for multiple EC fans is not permitted!
Depending on the type, multiple EC fans can be controlled with the 10 V DC power supply from one fan with
a potentiometer (PU/A). In this respect, consult the technical data for the control inputs and the wiring diagram
SS-1035. If the EC power supply current is not sufficient, a sufficient (customer-supplied) 10 V DC may be used (galva-
nically isolated from the mains power supply). Alternatively, the "EUR EC" module from Helios can be used for various
control tasks.
7�2

Wiring diagram overview

The allocated wiring diagram SS-979 must be observed (see Fig. 5). If stepless speed control takes place via the
speed-poteniometer PU/A 10, wiring diagram SS-980-1 must be observed (see Fig.6). Furthermore, the RR EC series
can be operated with the universal controller EUR EC (Ref. no. 01347) (refer to connection example Fig. 7).
7�2�1 Principle diagrams
The delivery includes an internal potentiometer in the terminal box, which can be used to set any fan speed between
min. and max. speed. For an external speed setting with a 0-10 V control signal, the internal potentiometer must be
removed. The diagrams show the potentiometer in principle. It is possible to connect an internal or external potentiome-
ter.
Fig�5
10k Potentiometer bzw.
0-10V Signal von z.B.
PU/A 10 Art.Nr. 1734/1735
oder EUR EC Art. Nr. 1347
10k Potentiometer or rather
0-10V Signal from e.g.
PU/A 10 Art.Nr. 1734/1735
or EUR EC Art. Nr. 1347
10k Potentiomètre resp.
0-10V Signal par example d`un
PU/A 10 Art.Nr. 1734/1735
ou EUR EC Art. Nr. 1347
85187 001 SS-979 30.06.22
M
EC
+
(5)
4 3
7
SS-979
EC-Motor
EC motor
Moteur EC
Klemmkasten
Terminal box
Boîte à bornes
EN