Instructions For Maintenance; Ball Bearings - Elektror HRD Serie Betriebs- Und Montageanleitung

The following U/f assignments must be confi gured at the
converter.
EN
U
B
0
f and U
B B
If this is ignored, the motor current will increase dispropor-
tionately and the drive motor will fail to achieve its rated
speed.
Warning!
To avoid personal damage, destruction of the
blower or motor overload, a higher frequency
(speed) than the frequency (f
rating plate must never be set on the converter
otherwise the motor may be overloaded or the
blower destroyed due to the increased speed. The
temperature sensors are connected to the corre-
sponding converter inputs to protective the drive
motor. Single-phase alternating current motors
are not suitable for converter operation.
It is absolutely essential that you observe the
installation and safety instructions described in
the respective operating or application manuals
provided by the frequency converter supplier to
guarantee a safe and trouble-free operation.
It is also important to note that special ambient
conditions may lead to a high level of contamina-
tion of the cooling fi ns with the FUK devices. The
frequency converter switches off if the cool-
ing output on the cooling fi ns is not adequate.
Regular cleaning is required for devices in these
environments.
Note!
The following times apply for the respective
device motor output class (see rating plate) with
run-up/expiry as well as speed changes in order
to avoid high component loads and faults in the
converter operation:
Device motor output
Motor output < 0.25 kW
0.25 kW < Motor output
<=3.0 kW
3.1 kW < Motor output
<= 7.5 kW
7.6 kW < Motor output
<= 11.0 kW
11.1 kW < Motor output
<= 30.0 kW
A uniform run-up and expiry must be guaranteed within the
run-up and expiry times.
No speed changes must occur during operation that exceed
the speed change during run-up and expiry.
Please note also that, in certain ambient conditions, heavy
soiling of the cooling fi ns can occur in FUK-compliant ap-
pliances. If the cooling capacity of the cooling fi ns is insuf-
fi cient, the frequency converter will shut down. Appliances
which are operated in these environments must be inspected
18
Prohibited
range
f
B
= refer to rating plate
) specifi ed on the
B
Run-up time Expiry time
[s]
5
10
20
30
30
Operating and assembly instructions HRD
on a regular basis.
Protection by residual-current-operated circuit breaker
(FI circuit-breaker):
The present IGBT frequency converters produce discharge
currents of >=3.5 mA due to their design principle. These dis-
charge currents can lead to unwanted tripping in systems
protected by a 30 mA-FI circuit-breaker.
If a fault occurs, fault currents can also discharge through the
PE conductor as direct current. If protection is needed on the
supply side by means of an FI circuit-breaker, then an ACDC
sensitive (type B) FI circuit-breaker must be used. Use of an
FI circuit-breaker other than type B can cause death or seri-
ous injury if a fault occurs.
To meet the EN 61800-5-1 standard, the PE conductor must
be duplexed and routed through separate terminals or have
a cross-section of at least 10 mm² Cu.
Operation and connection to public grids:
See 3.6
4.3 Hydraulic Motor Operation
The run-up and expiry times as well as the speed changes
specifi ed in 4.2 should be noted when operating with hydrau-
lic motors. Free-running hydraulic motors should be used to
guarantee a smooth run on.

5 INSTRUCTIONS FOR MAINTENANCE

Wearing parts are subject to the recommended maintenance
intervals (refer to 5.1 to 5.5). The service life of wearing parts
(ball bearings and fi lters) depends on the operating hours,
the load and other infl uences, such as temperature, etc.
Maintenance and servicing may only be performed by per-
sons with the necessary expertise and regular training. In ad-
dition to the appliance's operating instructions and the regu-
lations and recommendations for the system as a whole, the
following points should be observed:
Inspection and maintenance intervals:
The operator must set the cleaning, inspection and mainte-
nance intervals himself according to operating hours, load
and operating conditions.
Immediate inspection and maintenance:
The blower must be inspected immediately if vibrations or
reduced air fl ow are observed.
[s]
Note!
Repairs must be carried out by the manufacturer.
10
We cannot accept any liability for repairs carried
out by third parties.
20

5.1 Ball bearings

40
Note!
The fans from Elektror are equipped with sealed
60
deep groove ball bearings, which do not require
relubrication.
100
Note!
Check the ball bearings during servicing and pri-
or to recommissioning. Operation is only permit-
ted with fl awless ball bearings!
Note!
In the event of frequently starting up and shutting
down, premature replacement of the bearings will
be required. Determining the time for replacing
the bearings is the sole responsibility of the main-
tenance and servicing personnel, who must make
a safety judgement.
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