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RKB EC
Scan the QR code on the product label or visit www.ostberg.com
For further information about the product.
Description
RKB EC are in-line duct fans with backward curved
impellers and swing-out design. The fans are equipped
with external rotor induction EC-motor with
maintenance-free sealed ball-bearings.
The RKB EC is manufactured from galvanized steel
sheet.
WARRANTY
The warranty is only valid under condition that the fan
is used according to this “Directions for use” and a
regular maintenance has been made and documented.
The warrantor is responsible only for the operation if
approved accessories are used. The warranty does not
cover product failures caused by accessories/equipment
from other manufacturers.
APPLICATION
For technical data please see the label on the product, (picture 1) or www.ostberg.com.
RKB EC is accessible for the user, according to IEC
EN 60335-2-80, to by themselves do the service and
maintenance, according to this Directions for use. But
before this work the unit must be current less.
With reservation according to EN 60335-1, section 7.12.
”This appliance is can be used by children aged from
8 years and above and persons with reduced physical
sensory or mental capabilities or lack of experience
and knowledge, if they have been given supervision or
instruction concerning use of the appliance in a safe way
and understand the hazards involved. Children shall not
play with the appliance. Cleaning and user maintenance
shall not be made by children without supervision”.
• To achieve maximum life time for installations in
damp or cold environments, the fan should be
operating continuously.
• The fan can be installed outside or in damp
environments. Make sure that the fan house is
equipped with drainage.
• The fan can be installed in any position.
The fan is used for transportation of ”clean” air, meaning not intended for fl ammable substances,
explosives, grinding dust, soot, etc.
The fan is intended to be used at maximum the highest voltage and frequency that’s stated on the label
on the fan.– Example, see picture 1
Picture 1 (example)
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HOW TO HANDLE
• The fan must be transported in its packing until
installation. This prevents transport damages,
scratches and the fan from getting dirty.
• Attention, look out for sharp edges.
• Attention! The motor housing can reach temperatures
up to 85°C.
•
Waiting time of at least 3 minutes!
Due to internal
capacitors in the motor, there is a risk of accidents even
after the unit has been switched off by direct contact
with live parts or due to parts that have become live
due to faults. The motor control unit cover may only
be removed / opened when the power has been
disconnected for at least three minutes. The controller
housing may only be removed or opened when the
power line has been switched off and a period of three
minutes has elapsed since switching it off.
• Avoid extreme heat or cold, temperature range
-40 °C to 75 °C for storage and transport.
• Avoid prolonged storage; we recommend a
maximum of one year (consult the manufacturer
before starting if stored for longer).
INSTALLATION
1. The fan must be installed according to the air
direction label on the fan.
2. The fan must be connected to duct or equipped with
a safety grille.
3. The fan should be installed in a safe way and make
sure that no foreign objects are left behind inside.
4. The fan should be installed in a way that makes
service and maintenance easy. N.B.! Consider the
weight and size of the fan.
5. The fan should be installed in a way that vibrations
not can be transferred to duct or building. To provide
this, use for example a fl ange.
6. Electrical installations must be made by an
authorized electrician.
7. Electrical installation must be connected to a locally
situated isolator switch or by a lockable main witch.
8. Control that the fan is installed and connected
electrically in the right way, grounded and with
motor protection.
9. For single phase fans a residual current device is used
(type A).
10. For 3-phase fans a residual current circuit breaker is
used (type B).
11. See Wiring diagram at the lid of the junction box.
EC-motor
• Speed regulating of EC motor can be done with the
built-in potentiometer, 0-10 V. Picture 1 & 2
• An external potentiometer can be connected to the
terminal if necessary. The internal potentiometer
should then be disconnected.
• RKB 1000x500 F3 EC has a potential free alarm relay
that breaks at max AC 250 V 2A, ”K1”.
• The fans are equipped with a tachometer, with
1 pulses per revolution. It doesn’t apply on RKB
1000x500 F3 EC for which this info can be accessed
via Modbus instead.
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Picture 1
Picture 2
