Atlas Copco QAS 500

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2.2 Markings
A brief description of all markings provided on the
generator is given hereafter.
2.3 Mechanical features
The mechanical features described in this chapter are
standard provided on this generator. For all other
mechanical features, see “Overview of the
mechanical options” on page 97.
2.3.1 Engine and alternator
The alternator is driven by a fluid-cooled diesel
engine. The engine’s power is transmitted through a
direct disc coupling.
The generator houses a single bearing alternator with
a dedicated voltage regulator.
The synchronous brushless alternator has Class H
rotor and stator windings in an IP23 housing.
2.3.2 Cooling system
The engine is provided with a water cooler. The
cooling air is generated by a fan, driven by the engine.
Indicates that an electric voltage,
dangerous to life, is present. Never
touch the electric terminals during
operation.
Indicates that the engine exhaust is a
hot and harmful gas, which is toxic in
case of inhalation. Always make sure
that the unit is operated outside or in a
well-ventilated room.
Indicates that these parts can become
very hot during operation (e.g. engine,
cooler, etc.). Always make sure that
these parts are cooled down before
touching them.
Indicates that the guiding rods may not
be used to lift the generator. Always
use the lifting rod in the roof of the
generator to lift it.
Indicates a lifting point of the
generator.
Indicates that the generator may be
refuelled with diesel fuel only.
Indicates the drain for the engine oil.
Indicates the drain for the coolant.
Indicates the drain plug for the engine
fuel.
Use PAROIL E only.
Indicates the external fueltank.
Indicates that the alternator should not
be cleaned with high pressurised
water.
Indicates the battery switch.
Indicates that the unit may
start automatically and that
the instruction book has to
be consulted prior to use.
Indicates the 3-way valve.
Indicates the partnumbers of
the different service packs
and of the engine oil. These
parts can be ordered to the
factory.
XXXXXXXXXXXXXXX
Engine oil
PAROIL E PAROIL Extra
Engine coolant PARCOOL EG
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XX
XXXXXXX XXXX XXXX XX
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