Atlas Copco QAS 275-325, Instruction Manual

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Engine coolant specifications
The use of the correct coolant is important for good
heat transfer and protection of liquid-cooled engines.
Coolants used in these engines must be mixtures of
good quality water (distilled or de-ionised), special
coolant additives and if necessary freeze protection.
Coolant that is not to manufacturer's specification will
result in mechanical damage of the engine.
The freezing point of the coolant must be lower than
the freezing point that can occur in the area. The
difference must be at least 5°C. If the coolant freezes,
it may crack the cylinder block, radiator or coolant
pump.
Consult the engine's operation manual and follow the
manufacturer's directions.
Specifications PARCOOL EG
PARCOOL EG is the only coolant that has been
tested and approved by all engine manufacturers
currently in use in Atlas Copco compressors and
generators.
Atlas Copco's PARCOOL EG extended life coolant is
the new range of organic coolants purpose designed
to meet the needs of modern engines. PARCOOL EG
can help prevent leaks caused by corrosion.
PARCOOL EG is also fully compatible with all
sealants and gasket types developed to join different
materials used within an engine.
PARCOOL EG is a ready to use Ethylene Glycol
based coolant, premixed in an optimum 50/50
dilution ratio, for antifreeze protection guaranteed to
-40°C.
Because PARCOOL EG inhibits corrosion, deposit
formation is minimized. This effectively eliminates
the problem of restricted flow through the engine
coolant ducts and the radiator, minimizing the risk for
engine overheating and possible failure.
It reduces water pump seal wear and has excellent
stability when subjected to sustained high operating
temperatures.
PARCOOL EG is free of nitride and amines to protect
your health and the environment. Longer service life
reduces the amount of coolant produced and needing
disposal to minimise environmental impact.
To ensure protection against corrosion, cavitation and
formation of deposits, the concentration of the
additives in the coolant must be kept between certain
limits, as stated by the manufacturer's guidelines.
Topping up the coolant with water only, changes the
concentration and is therefore not allowed.
Liquid-cooled engines are factory-filled with this
type of coolant mixture.
Never remove the cooling system filler
cap while coolant is hot.
The system may be under pressure.
Remove the cap slowly and only when
coolant is at ambient temperature. A
sudden release of pressure from a
heated cooling system can result in
personal injury from the splash of hot
coolant.
It is strongly recommended to use
Atlas Copco branded coolant.
Never mix different coolants and
mix the coolant components outside
the cooling system.
Never replace the coolant filter on
the engine! Just replace the coolant
every 5 years or after 10.000
running hours.
Liter
US
gal
Imp
gal
cu.ft
Order
number
can 5 1.3 1.1 0.175 1604 5308 00
can 20 5.3 4.4 0.7 1604 5307 01
barrel 210 55.2 46 7.35 1604 5306 00