Tool Applications Safety; Specific Safety Precautions - Atlas Copco XAS 400 JD IT4 HOP Instruction Manual

23 Make sure that oil, solvents and other substances likely
to pollute the environment are properly disposed of.
24 Before clearing the unit for use after maintenance or
overhaul, check that operating pressures, temperatures
and speeds are correct and that the control and
shutdown devices function correctly.

TOOL APPLICATIONS SAFETY

Apply the proper tool for each job. With the knowledge of
correct tool use and knowing the limitations of tools,
along with some common sense, many accidents can be
prevented.
Special service tools are available for specific jobs and
should be used when recommended. The use of these
tools will save time and prevent damage to parts.

SPECIFIC SAFETY PRECAUTIONS

Batteries
When servicing batteries, always wear protecting
clothing and glasses.
1 The electrolyte in batteries is a sulphuric acid solution
which is fatal if it hits your eyes, and which can cause
burns if it contacts your skin. Therefore, be careful
when handling batteries, e.g. when checking the charge
condition.
2 Install a sign prohibiting fire, open flame and smoking
at the post where batteries are being charged.
3 When batteries are being charged, an explosive gas
mixture forms in the cells and might escape through the
vent holes in the plugs. Thus an explosive atmosphere
may form around the battery if ventilation is poor, and
can remain in and around the battery for several hours
after it has been charged. Therefore:
- never smoke near batteries being, or having recently been,
charged,
- never break live circuits at battery terminals, because a
spark usually occurs.
4 When connecting an auxiliary battery (AB) in parallel
to the unit battery (CB) with booster cables: connect
the + pole of AB to the + pole of CB, then connect the
- pole of CB to the mass of the unit. Disconnect in the
reverse order.
Pressure vessels
Maintenance/installation requirements:
1 The vessel can be used as pressure vessel or as
separator and is designed to hold compressed air for the
following application:
- pressure vessel for compressor,
- medium AIR/OIL,
and operates as detailed on the data plate of the vessel:
- the maximum working pressure ps in bar (psi),
- the maximum working temperature Tmax in °C (°F),
- the minimum working temperature Tmin in °C (°F),
- the capacity of the vessel V in l (US gal).
2 The pressure vessel is only to be used for the
applications as specified above and in accordance with
the technical specifications. Safety reasons prohibit
any other applications.
3 National legislation requirements with respect to re-
inspection must be complied with.
4 No welding or heat treatment of any kind is permitted
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to those vessel walls which are exposed to pressure.
5 The vessel is provided and may only be used with the
required safety equipment such as manometer,
overpressure control devices, safety valve, etc.
6 Draining of condensate shall be performed daily when
vessel is in use.
7. Installation, design and connections should not be
changed.
8. Bolts of cover and flanges may not be used for extra
fixation.
Safety valves
Operating & Maintenance
Only trained and technically competent personnel should
consider overhaul, re-set or performance testing of safety
valves.
The safety valve is supplied with either a lead security
seal or crimped cover to deter unauthorised access to the
pressure regulation device.
Under no circumstances should the set pressure of the
safety valve be altered to a different pressure than that
stamped on the valve without the permission of the
installation designer.
If the set pressure must be altered then use only correct
parts supplied by Atlas copco and in accordance with the
instructions available for the valve type.
Safety valves must be frequently tested and regularly
maintained.
The set pressure should be periodically checked for
accuracy.
When fitted, the compressors should be operated at
pressures not less than 75% of the set pressure to ensure
free and easy movement of internal parts.
The frequency of tests is influenced by factors such as the
severity of the operating environment and aggressiveness
of the pressurised medium.
Soft seals and springs should be replaced as part of the
maintenance procedure.
Do not paint or coat the installed safety valve (see also
Preventive maintenance schedule).