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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.
Before filling the hydraulic system, check that the drain valve is closed and that all the air valves are open.
Open the shut-off devices of the system and start to fill it by slowly opening the water filling valve.
When water begins to come out through the air valves, close them and continue filling until the pressure value envisaged
for the system is reached.
The unit should only be started up by qualified personnel authorised by the manufacturer.
All the units are pre-charged with refrigerant gas, so the refrigerant circuit is pressurised.
Check:
- that the electrical connection has been made correctly and that all the terminals are properly tightened;
- **non tradotto**
- that the gas pressure in the refrigerant circuits is shown on the pressure gauges (if present) or on the display of the
control.
- that there are no refrigerant fluid leaks, using a leak detector if necessary (the presence of oil stains may be a sign of
refrigerant leaks).
Be careful with the electrical checks and use only suitable tools.
Position the master switch of the unit to ON and check on the display of the control that the unit is OFF in order to prevent
it from starting.
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:
- that the hydraulic connections have been made properly, according to the instructions given on the inlet / output plates
and that a mechanical filter has been installed at the unit’s inlet (a mandatory component, whose absence will invalidate
the warranty);
- 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 organised a storage tank with the appropriate capacity for the volume of the system’s water.
Before starting the unit, check that all the closing panels of the unit are in place and secured with fixing
screws.
