1.3
Safety precautions during installation
Precautions during installation
1. The dryer must only be lifted using suitable equipment and 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. Place the dryer 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.
3. Any blanking flanges, plugs, caps or desiccant bags must be removed before connecting the
pipes.
4. 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.
5. The aspirated air must be free of flammable fumes, vapours and particles, e.g. paint
solvents, that can lead to internal fire or explosion.
6. Arrange the air intake so that loose clothing worn by people cannot be sucked in.
7. Ensure that all piping is free to expand under heat and that it is not in contact with or close to
flammable materials.
8. No external force may be exerted on the air outlet valve. The connected pipe must be free of
strain.
9. 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 that the isolating switch is
open and locked before any maintenance or repair. As a further safeguard, persons
switching on remotely controlled machines shall take adequate precautions to ensure that
there is no one checking or working on the machine. To this end, a suitable notice shall be
affixed to the starting equipment.
10. Air-cooled machines must be installed in such a way that an adequate flow of cooling air is
available and that the exhausted cooling air does not recirculate to the inlet.
11. The electrical connections must correspond to the applicable codes. The machines must be
earthed and protected against short circuits by fuses in all phases. A lockable power
isolating switch must be installed near the equipment.
12. On machines with automatic start-stop system or if the automatic restart function after
voltage failure is activated, a sign stating "This machine may start without warning" must be
affixed near the instrument panel.
13. Never remove or tamper with the safety devices, guards or insulation fitted on the machine.
Every pressure vessel or auxiliary installed outside the machine to contain air above
atmospheric pressure must be protected by a pressure-relieving device or devices as
required.
14. Piping or other parts with a temperature in excess of 80˚C (176˚F) and which may be
accidentally touched by personnel during normal operation must be guarded or insulated.
Other high-temperature piping must be clearly marked.
15. For water-cooled machines, the cooling water system installed outside the machine has to
be protected by a safety device with set pressure according to the maximum cooling water
inlet pressure.
16. If no safety valve is present in the air net close to the desiccant dryer (e.g. safety valve of
compressor), full flow safety valves must be installed on the dryer vessels.
Instruction book
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2920 7111 40
