I N S T A L L A T I O N
11
• 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.
• See Wiring diagram at the lid of the junction box.
• 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 i used
(type A).
• For 3-phase fans a residual current circuit breaker is
used (type B).
AC-MOTOR
• For speed regulation of AC motor a transformer or
thyristor can be connected.
• The AC motor has a built-in thermal contact.
• The capacitor (only for AC motor) has finite life-
time and should be exchanged after 45.000 opera-
tion hours (about 5 years of operation) to secure
maximum function. Defective capacitor can cause
damage.
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 disconnected.
• IRB EC (does not apply for 125 B1/160B1/200 C1/
250 A1/250 B1/400x200 C1/500x250 A1/500x
250 B1) has a potentional free alarm relay that
breaks at max AC 250 V 2A, ”K1”
.
Fans eqipped with a tachometer, see page 15 Tech-
nical Data, for number of pulses per revolution.
• Some EC motors has tachometer output one pulse
per revolution.
• EMC-compatible installation of external control
lines: The control cable must not be longer than 30
m. Screened control cables must be used when the
cable length is longer than 20 m. When using a shi-
elded cable connect the shielding to one side only,
i.e. only to the device with the protective ground
(keep cable short and with as little inductance as
possible!). Pay attention to sufficient distance from
power lines and motor wires to prevent interferen-
ces.
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 IRB 250 E1 EC,
IRB 500x 250 E1 EC, IRB 315 A1 EC and IRB
600x300 A1 EC applies:
• Baud rate: 19200
• Bits: 8
• Parity: None
• Stop bits: 1
• Handshake: None
E N G L I S H