Ostberg RKB EC Montageanleitung Seite 9

I N S T A L L A T I O N
• The fan must be installed according to the air direc-
tion label on the fan.
• The fan must be connected to duct or equipped with
a safety grille.
• The fan should be installed in a safe way and make
sure that no foreign objects are left behind.
• The fan should be installed in a way that makes ser-
vice and maintenance easy. N.B.! Consider the
weight and size of the fan.
• The fan should be installed in a way that vibrations
not can be transfused to duct or building. To provi-
de this, use for example a flange.
• Electrical installations must be made by an authori-
zed electrician.
• Electrical installation must be connected to a local-
ly situated isolator switch or by a lockable main
switch.
• Control that the fan is installed and connected elec-
trically in the right way, grounded and with motor
protection.
• For single phase fans a residual current device is used
(type A).
• For 3-phase fans a residual current circuit breaker is
used (type B).
• Wiring diagrams for each product see the Technical
Data on page 21 and page 22.
EC-MOTOR
• Speed regulating of EC
motor can be done with
the built-in potentio-
meter, 0-10 V.
An external potentio-
meter can be connected
to the terminal if neces-
sary. The internal poten-
tiometer should then
be disconnec-
ted.
• RKB EC (does not apply for RKB 300x150 B1 EC,
RKB 400x200 C1 EC, RKB 500x250 A1 EC, RKB
500x250 B1 EC) has a potentional free alarm relay
that breaks at max AC 250 V 2A,
Some EC motors has tachometer output, one pulse
per revolution. For motors with Modbus and ter
minal tachometer output, tacho signal is not standard
but can be configured through Modbus parameters.
EMC-COMPATIBLE INSTALLATION OF EXTERNAL
CONTROL LINES: The control cable may not be
longer than 30 m. Screened control cables must be
used when the cable length is longer than 20 m.
When using a shielded cable connect the shielding
to one side only, i.e. only to the device with the pro-
tective ground (keep cable short and with as little
inductance as possible!). Pay attention to sufficient
distance from power lines and motor wires to pre-
vent interferences.
Attention! Ensure correct polarity! Never apply
line voltage to analog inputs!
• The EC motor has electronically thermal-/over-
voltage protection.
MODBUS
For Modbus, the fan types RKB 500x250 E1 EC and
RKB 600x300 A1 EC applies:
• Baud rate: 19200
• Bits: 8
• Parity: Steady
• Stop bits: 1
• Handshake: None
9
"K1".