Edwards nES Series, Instruction Manual, Page: 14 / 56

5. Never operate the machine below or above its limit ratings.
6. Keep all bodywork doors shut during operation. The doors may be opened for
short periods only, for example, to do routine checks. Wear ear protectors when
opening a door.
On vacuum pumps without bodywork, wear ear protection in the vicinity of the
machine.
7. People staying in environments or rooms where the sound pressure level reaches
or exceeds 80 dB(A) must wear ear protectors.
8. Periodically check that:
▪ All guards are in place and securely fastened.
▪ All hoses and pipes inside the machine are in good condition, secure and not
rubbing.
▪ There are no leaks.
▪ All fasteners are tight.
▪ All electrical leads are secure and in good order.
▪ Safety valves and other pressure relief devices are not obstructed by dirt or
paint.
▪ Air outlet valve and air net, that is pipes, couplings, manifolds, valves, hoses,
and so forth, are in good repair, free of wear or abuse.
▪ Electrical cabinet air cooling filters are not clogged.
9. If warm cooling air from vacuum pumps is used in air heating systems, for example,
to warm up a workroom, take precautions against air pollution and possible
contamination of the breathing air.
10. On water-cooled vacuum pumps using open circuit cooling towers, protective
measures must be taken to avoid the growth of harmful bacteria such as Legionella
pneumophila bacteria.
11. Do not remove any of, or tamper with, the sound-damping material.
12. Never remove or tamper with the safety devices, guards or insulations fitted on
the machine.
13. The oil separator tank can be slightly pressurised. Do not open and do not leave oil
filler or drain plugs open during operation.
14. Do not use the pump as a compressor.
15. Never run the pump without the air inlet filter mounted.
Note:
Refer to Safety precautions during installation on page 10 Safety precautions
during installation on page 8 and Safety precautions during maintenance or repair
on page 13 Safety precautions during maintenance or repair on page 10.
1.6 Safety precautions during maintenance or repair
1. Always use the correct safety equipment (such as safety glasses, gloves, safety
shoes, and so forth).
2. Use only the correct tools for maintenance and repair work.
3. Use only genuine spare parts.
4. All maintenance work shall be performed after the machine has cooled down.
Page 10 - 07/2020
A35104880_B - Safety and compliance