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We reserve the right to make changes without any prior notice.
Translation from original instructions
6 COMMISSIONING
6.1 Preliminary operations
Make sure the main disconnect switch is in the OFF position.
The unit should only be started up by qualified personnel authorised by the manufacturer.
Check:
- that the electrical connection has been made correctly and that all terminals are properly tightened.
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that the voltage on the RST terminals is 400 V ± 10% for the three-phase units or on FN terminals is 230 V ± 10% for
single phase units (or the one reported on the plate of the unit in case of special voltages). If the voltage fluctuates fre
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quently, contact our technical department in order to choose suitable protective devices;
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that the phase sequence is correct for the three phase units;
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that the gas pressure in the refrigerant circuits is shown on the pressure gauges (if present) or on the control display;
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that there are no refrigerant fluid leaks, using a leak detector if necessary (the presence of oil stains is a sign of refri
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gerant leaks).
Be careful with the electrical checks and use only suitable tools.
Move the main switch of the unit to the ON position and verify on the user interface that the unit is OFF.
Check that the crankcase heaters are powered correctly.
The crankcase heaters are switched on when the main disconnect switch is closed and this must be done at
least 12 hours before starting the unit.
To check that the heaters are working correctly, check that the lower part of the compressors is hot and in any case at a
temperature of 10 - 15 °C above ambient temperature.
Check:
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that any hydraulic connections have been correctly made, following the indications on the inlet / outlet plate on board
the machine and / or on the diagrams supplied;
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that a mechanical filter on the unit’s inlet (a mandatory component; non-compliance will invalidate the warranty) has
been installed in the hydraulic circuit;
- that the hydraulic system has been vented, eliminating any excess air, loading it gradually and opening the venting
devices on the top;
- that the installer has prepared an expansion vessel of suitable capacity for the water volume of the system;
- that all the taps in the refrigerating circuit are open;
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that all the infill and closing panels of the unit have been secured.
