Lindab SRF Manual

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This directions for use contains following products:
Rectangular Duct Fans SRF, SRF EC, LRF, LRF EC, IRF, MFF
D E S C R I P T I O N
• The fan is used for transportation of "clean" air, mea-
ning not intended for fire-dangerous substances,
explosives, grinding dust, soot, etc.
• The fan is equipped with an asynchronous external
rotor induction motor with maintenance-free sealed
ball-bearings.
• The capacitor has finite lifetime and should be ex-
changed after 45. operation hours (about 5
years of operation) to secure maximum function.
Defective capacitor can cause damage.
• 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 envi-
ronments. Make sure that the fan-house is equipped
with drainage.
• The fan is intended to be used with the voltage and
frequency that's stated on the label on the fan.
• The fan can be installed in any position.
I N S T A L L A T I O N
• 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 transfused to duct or building. To provi-
de this, use for example a flange.
• To regulate the speed a transformer or a speed
controller can be connected.
• A wiring diagram is applied on the inside of the
junction box or separately enclosed.
• The fan is installed and connected electrically in the
right way grounded and with motor protection.
• The motor protection must always be used, see
wiring diagram.
• Electrical installations must be made by an
authorized electrician.
• Electrical installations must be connected to a
locally situated tension free switcher or by a
lockable head switcher.
O P E R A T I O N
Before starting, make sure that:
• the current does not exceed more than +5% of
what is stated on the label.
• the connecting voltage is in between +6% to —
1 % of the rated voltage.
• no noise appears when starting the fan.
• the rotation direction at 3-phase motors are
according to the label.
H O W T O H A N D L E
• The fan must be transported in its packing until in • Attention, look out for sharp edges and corners.
stallation. This prevents transport damages, scrat-
ches and the fan from getting dirty.

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M A I N T E N A N C E
• Before service, maintenance or repair begins, the
fan must be tension free and the impeller must
have stopped.
• Consider the weight of the fan when removing or
opening larger fans to avoid jamming and contu-
sions.
• The fan must be cleaned when needed, at least once
per year to maintain the capacity and to avoid unba-
lance which may cause unnecessary damages on the
bearings.
• The fan bearings are maintenance-free and should
be renewed only when necessary.
• When cleaning the fan, high-pressure cleaning or
strong dissolvent must not be used.
• Cleaning should be done without dislodging or
damaging the impeller.
• Make sure that there is no noise from the fan.
F A U L T D E T E C T I O N
1. Make sure that there is tension to the fan.
2. Cut the tension and verify that the impeller is not
blocked.
3. Check the thermo-contact/motor protector. If it is
disconnected the cause of overheating must be
taken care of, not to be repeated. To restore the
manual thermo-protector the tension will be cut for
a couple of minutes. Larger motors than 1,6 A may
have manual resetting on the motor. If it has auto-
matic thermo-protector the resetting will be done
automatically when the motor is cold.
4. Make sure that the capacitor is connected, (single
phase only) according to the wiring diagram.
5. If the fan still does not work, the first thing to do
is to change the capacitor.
6. If nothing of this works, contact your fan supplier.
7. If the fan is returned to the supplier, it must be
cleaned, the motor cable undamaged and a
detailed nonconformity report enclosed.