4
OPERATING AND MAINTENANCE MANUAL
Chapter 2
- Safety
NRC0020-0200 UL
The data in this manual are not binding and may be changed by the manufacturer without notice.
Reproduction of this manual, even partial, is strictly prohibited.
C
HAPTER
2
S
AFETY
CAUTION
This unit is designed for safety in its intended use, provided it is installed, commissioned, and serviced in compliance with the instructions given
in the present manual.
The unit contains electrical components that operate at mains voltage and also moving parts such as fans, it must therefore normally be
disconnected from the electrical power supply before it is opened.
Operation, overhauls or repair of the unit or any maintenance operations that call for access to the unit must be executed by skilled or suitably
qualified personnel who are fully aware of all the necessary precautions, preferably under the guidance of a qualified supervisor.
2 . 1
G e n e r a l
The user must ensure that all personnel involved in operating and servicing the dryer and the auxiliary equipment have read and
understood all the warnings, precautions, prohibitions and notes given in this manual and affixed to the unit.
If the user adopts operational procedures or uses tools or working procedures that are not specifically recommended, care must be taken to ensure
that the dryer and the auxiliary equipment are not damaged or made unsafe and that no risks emerge in relation to persons or property.
Any improper use of the machine will relieve the manufacturer from any liability for possible personal injury or property damage.
Arbitrary modifications made to the unit will automatically invalidate all forms of guarantee provided by the manufacturer.
2 . 2
G e n e r a l p r e c a u t i o n s
2.2.1 Type of compressed gases to be dried
The compressed gases that can be dried must be compatible with the unit's construction materials (carbon steel, cast iron, copper and copper
alloys) and can be, for example air, nitrogen, argon and helium.
CAUTION
The compressed gases must not give rise to phenomena of corrosion that could impair the condition of pressurised containers and they must not
be able to cause fire or explosions in the event of leakage or expulsion.
2.2.2 Precautions during lifting and transport
When a load is lifted from the ground keep well clear of the area beneath the load and the immediately surrounding area.
Keep accelerations and lifting speed well within safety limits and never leave a suspended load attached to a hoist any longer than strictly necessary.
Handling of dryers must be carried out in compliance with the diagrams given (see the final part of this manual).
The manufacturer does not supply bars, belts and lifting hooks with the unit.
CAUTION
The unit's weight is shown on the dataplate and on the label affixed to the crate.
2.2.3 Precautions to be adopted during installation and operation
For connection to the mains power supply follow the instructions given in Chapter 5 “Installation” and refer to the electrical diagrams.
Check the direction of rotation of the motors (in particular three-phase fans) when starting the unit for the first time after work has been
performed on the electrical connections or on the power supply sectioning device.
All piping must be painted and marked clearly in compliance with local safety prescriptions in force in the place of installation.
Do not remove or tamper with safety devices, protections, or the insulating materials installed in the unit or in the auxiliary equipment.
The dryer and its auxiliary equipment must be connected to earth and protected against short circuits and overloads.
When the unit is powered, the voltage in the electrical circuit assumes potentially lethal values so the maximum precautions must be adopted if
work is to be carried out on the electrical circuit.
Do not open the electrical equipment enclosure panels while the electrical system is powered unless this is strictly necessary for the execution of
tests, measurements or settings.
This work must be carried out exclusively by qualified personnel equipped with suitable tools and wearing all the relevant protective equipment
to safeguard against electrical hazards.
2.2.4 Precautions for maintenance and repair
If spare parts are required, use exclusively genuine original parts.
Keep a written record of all work carried out on the unit and the auxiliary equipment.
The frequency and nature of the work required in a certain period can reveal abnormal operating conditions that require correction.
Use exclusively the refrigerant specified on the machine dataplate.
Make sure that all the instructions concerning operation and maintenance are followed scrupulously and that the entire unit and all the
accessories and safety devices are maintained in proper working order.
Always keep the unit clean.
Protect components and exposed openings, plugging them, for example with clean rags during maintenance and repair work.
Precautions must be taken when before welding or performing repair operations that may generate heat, flames or sparks.
Components in the vicinity must be protected with non-inflammable material.
Do not weld or perform work that generates heat close to a system that contains oil.
Summary of Contents for NRC0020-0200 UL
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