Ostberg BFS AC Gebrauchsanweisung Seite 7

INSTALLATION
• The fan must be installed according to the air
direction 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
service 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 transferred to duct or building. To pro-
vide this, use for example a flange.
• Electrical installations must be made by an autho-
rized 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
electrically in the right way, grounded and with
motor protection.
• For single phase fans a residual current device i
used (type A).
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 has finite lifetime and should be
exchanged after 45.000 operation hours (about
5 years of operation) to secure maximum function.
Defective capacitor can cause damage.
OPERATION
For technical data please see the product label.
Before starting, make sure that:
• the current does not exceed more than +5% of
what is stated on the label.
ENGLISH
Some EC motors has tachometer output one pulse
per revolution.
• EMC-COMPATIBLE INSTALLATION OF
EXTERNAL CONTROL LINES: The control
cable must not be onger 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 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 interferences.
Attention! Ensure correct polarity! Never apply
line voltage to analog inputs!
• The EC motor has electronically thermal-/over-
voltage protection.
• the supplied voltage is within +6% to –10% of the
rated voltage.
• no noise appears when starting the fan.
7
EC-MOTOR
• Speed regulating of
EC-motor can be done
with the built-in pot-
entiometer, 0-10 V.
An external potentio-
meter can be connec-
ted to the terminal if
necessary. The internal
potentiometer should
then be disconnected.