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Atlas Copco QAS 500

Atlas Copco QAS 500
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9.4 Overview of the mechanical
options
The following mechanical options are available:
Quick couplings
Integrated spark arrestor
Air inlet shut-off valve
Engine preheater
9.5 Desciption of the
mechanical options
9.5.1 Quick couplings
The option Quick couplings allows to bypass the
internal fueltank and to connect an external fueltank
to the unit.
Make sure that:
the big size coupling is used for the inlet.
the small size coupling is used for the outlet.
9.5.2 Integrated spark arrestor
The integrated spark arrestor option is included in the
refinery equipment pack.
9.5.3 Air inlet shut-off valve
The engine air inlet shut-off valve option is included
in the refinery equipment pack. It will prevent over-
speeding of the engine due to combustible gases
being traced within the normal engine air intake.
9.5.4 Engine preheater
When operating at low temperatures, the engine
preheater preheats the cooling fluid before starting,
which allows the engine to start more easily.
Additionally the engine preheater prolongs the
engines lifetime as cold starts are avoided.
EFT
External fuel tank connection
EFR
External fuel tank return connection
EFTEFR
EFT
EFR
An extra clamp needs to be used to
guide the fuellines.
The engine preheater is not available
for units with Qc1002™ controller.

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