Atlas Copco APF221384, Original Instruction Book

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9. The Variable Speed Drive is equipped with a Safe Torque Off function, triggered by the
emergency stop button. The Safe Torque Off function has the immediate effect that the drive
can not supply any torque-generating energy. The drive is reliably torque-free. This state is
monitored internally in the drive.
The Safe Torque Off function does not disconnect the voltage of the main and auxiliary
circuits from the drive. Maintenance work on electrical parts of the drive or the motor can
only be carried out after isolating the drive system from the main supply!
10. If compressed air is used in the food industry and more specifically for direct food contact, it
is recommended, for optimal safety, to use certified Class 0 compressors in combination
with appropriate filtration depending on the application. Please contact your customer center
for advice on specific filtration.
1.3 Safety precautions during installation
All responsibility for any damage or injury resulting from neglecting these precautions, or
non observance of the normal caution and care required for installation, operation,
maintenance and repair, even if not expressly stated, will be disclaimed by the
manufacturer.
Precautions during installation
1. The machine must only be lifted using suitable equipment in accordance with the applicable
safety regulations. Loose or pivoting parts must be securely fastened before lifting. It is
strictly forbidden to dwell or stay in the risk zone under a lifted load. Lifting acceleration and
deceleration must be kept within safe limits. Wear a safety helmet when working in the area
of overhead or lifting equipment.
2. The unit is designed for indoor use. If the unit is installed outdoors, special precautions must
be taken; consult your supplier.
3. In case the device is a compressor, place the machine where the ambient air is as cool and
clean as possible. If necessary, install a suction duct. Never obstruct the air inlet. Care must
be taken to minimize the entry of moisture at the inlet air.
4. Any blanking flanges, plugs, caps and desiccant bags must be removed before connecting
the pipes.
5. Air hoses must be of correct size and suitable for the working pressure. Never use frayed,
damaged or worn hoses. Distribution pipes and connections must be of the correct size and
suitable for the working pressure.
6. In case the device is a compressor, the aspirated air must be free of flammable fumes,
vapors and particles, e.g. paint solvents, that can lead to internal fire or explosion.
7. In case the device is a compressor, arrange the air intake so that loose clothing worn by
people cannot be drawn in.
8. Ensure that the discharge pipe from the compressor to the aftercooler or air net is free to
expand under heat and that it is not in contact with or close to flammable materials.
9. No external force may be exerted on the air outlet valve; the connected pipe must be free of
strain.
10. If remote control is installed, the machine must bear a clear sign stating: DANGER: This
machine is remotely controlled and may start without warning.
The operator has to make sure that the machine is stopped and depressurized and that the
electrical isolating switch is open, locked and labelled with a temporary warning before any
maintenance or repair. As a further safeguard, persons switching on or off remotely
Instruction book
6 APF221384