Functional Description Rr Ec; Wiring Diagram Overview - Helios RR EC Série Notice De Montage Et D'installation

Installation and Operating Instructions
CHAPTER 7
FUNCTION FOR
INSTALLER
m
CAUTION
m
NOTE
m
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..
7.0 Functional description RR.. EC ...
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), three-step switches (Type SU/A) are offered in the Helios accessories range. Stepless
speed control is possible with the universal controller (Type EUR EC; SS-981). Alternatively, the electronic
differential pressure/temperature controller EDR / ETR can be used.
m
A minimum speed/voltage, which also depends on on-site resistances, wind pressure, etc., must be obser-
ved 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:
EC fans can be frequently activated and deactivated via the 0-10 V control input or the release input depending on the
type. This is gentle on the electronics and ensures a long service life. Control via the power supply (on/off) is not recom-
mended. In general, there must be an interval of at least 120 seconds between activation and deactivation.
Controlling multiple EC fans with a potentiometer
In order to control multiple EC fans above the setpoint input "0-10V", the 10V DC voltage source must supply the
sum of all setpoint input load currents.
m
The parallel switching of +10V DC power supplies for multiple EC fans is not permitted!
Depending on the type, multiple EC fans can be controlled with the 10V 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) 10V 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.
7.1

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 must be observed (see Fig.6). Furthermore, the RR EC series
can be operated with the universal controller EUR EC (Ref. no. 1347) (refer to connection example Fig. 7).
7.1.1 Wiring diagram SS-979
Fig.5
10k Potentiometer
bauseits zu stellen bzw.
0-10V Signal von z.B.
PU/A 10 Art.Nr. 1734/1735 oder
EUR EC Art. Nr. 1347
85187 001 SS-979 16.07.13
EC-Motor
EC
(5)
4
Klemmkasten
7 7
M
3
EN
SS-979