Servicing And Maintenance - Nidec EMBRACO SLIDING UNIT Serie Montageanleitung

2. If oil sight glass is present, observe the oil level during operating condition to confirm the oil remains visible.
3. The high and low operating pressures are correct.
4. Fan blades are rotating freely.
5. Check if the airflow is from the condenser towards the fan.
6. Superheat and subcooling are on line with the state of the art (do not overcharge the system).
7. The system is checked again for leak.
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8. For proper operation it is recommended to change the filter drier after 1 run of the Unit.
Make sure the installation is running smoothly.
The scroll compressor needs a run-in period minimum 72 hours to give its full performances. During this break-in the
power input can be slightly higher than normal conditions.
System normal cycling is 6-12 cycles per hour (depending on application);with sufficient continuous run time to
ensure the proper return of the oil to thecompressor and enough motor cooling.The suggested minimum continuous
running time is 3 minutes. To avoid frequentstart/stop, the minimum interval between the stop and next start is 3
minutes. If short cycling cannot be avoided, using a 3-minute time delay relay will limit the cycling of thecompressor
to an acceptable level.
Carry out a general inspection of the installation (e.g. cleanliness, vibration and/or unusual noises).
Ensure the settings and the functions of the electrical circuits are correct.

5. SERVICING AND MAINTENANCE

No unauthorized modifications to the Units are allowed. Authorization from EMBRACO must be obtained prior to any
modification whatsoever. The housing can be cleaned with hot water (70°C). Do not use product containing alcohol
or ethanol. Any faulty part must be replaced with the original spare part. In case a replacement of electrical
components of compressor is required, use a full KIT from EMBRACO. In order to maintain the low noise of the Unit
over time, we recommend replacing the anti-vibrations mounts as soon as any change on the noise or vibration level
of the Unit is noticed.
Always switch off the Units at main switch before opening the Units.
5.1 Fan
Use correct spare part KIT from EMBRACO.
5.2 Condenser
The condenser must be cleaned ideally twice a year (before and after the hot season).
5.3 Leak checking and periodical inspections
A leak check must be carried out at least once a year. It can vary according to the teqCO2, refrigerant and charge
used. Please refer to your local regulation. Check regularly:
• The condition of refrigeration connections (e.g. for any loosening or oxidation).
• Operating conditions.
• The mounting of the Unit on its base.
• The housing fixing (no vibration).
• Oil level for Scroll compressors.
5.4 Electrical checks
Systematically check all electrical components. If screwed terminal, tighten connections once a year.
Check regularly:
• Safety and control devices
• Crankcase heater operation.
5.5 Filter drier
Units are fitted with a brazed filter drier. When changing the filter drier, ensure that it is replaced with an equivalent
in capacity and pressure drop and with the correct direction of flow. For proper operation it is recommended to
change the filter drier after each service activity affecting refrigeration circuit.
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