Hyundai DHY11KSE, User Manual

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User manual
7
very important.
Noise reduction engineering is a comprehensive and
professional engineering. During the process when
users try to design the scheme for noise reduction
project, at the same time please fully consider the
bottom limit of air inlet/outlet volume needed by
engine’s normal running and the maximum allowed
value for exhaust backpressure etc. Otherwise, the
noise reduction project will seriously affect generator
set’s output power, and make generator set’ s
temperature rise, cause frequent malfunction of the
generator set, and even it will shorten the life
expectancy of generator set.
Note:
HYUNDAI Power can provide customers with overall
sound proof generator set.
2.6
Cooling system
Our standard configuration diesel generator sets are
closed cycling water chilling units with fan and
radiator installed. Closed water chilling engine drive
the cooling pump to generate circulation power,
which keep the anti ‐ freeze in the paths of cylinder
body and cover continuous circulation and heat
elimination. Engine’s cooling pump, radiator (or heat
exchanger) forms a closed, pressure cycling and
cooling system.
The most common cooling system is cooling fan
directly driven by radiator and engine, which can be
replaced by heat exchanger, remote radiator or
remote cooling tower etc. If the installation position
of the remote cooling fan is relatively higher,
transmission radiator is needed to prevent the
damage of heat exchanger caused by too big internal
pressure.
Note:
The dirty material stay in the radiator’s core will
greatly affect radiator’s cooling capacity. And
therefore it is necessary to clean the radiator often.
2.6.1
Coolant
Cooling system shall use the coolant which can
protect the engine from contamination and freezing.
Coolant shall be a mixture of pure water and
anti ‐ freeze or pure water and anti ‐ rust fluid. In this
mixture, water PH value shall be between 6
～
8,
usually suggest to use distilled water. The specific
mixing ratio shall be according to local weather, and
that of the coolant recommended by the engine
supplier, and reference to the operation (preparation)
manual of the coolant. Mix the liquids in a separate
container evenly and then add the mixture into the
radiator, ensure the anti ‐ freeze will not freeze under
low temperature. In the area when there is low
possibility of freezing, the coolant can be a mixture of
water and anti ‐ rust, according to the anti ‐ rust which
recommended by the engine supplier and refer to its
operation manual, mix the liquids in a separate
container evenly and then add the mixture into the
radiator. At the first time when anti ‐ rust is added, the
generator set shall be kept running until it get to hot
so that to achieve the best effect of anti ‐ corrosion.
Engine’s coolant shall have three functions listed as
below:
◆
Provide enough heat transmission capacity
◆
Prevent all metal material and sealing material
within the cooling system from corrosion(Cave
corrosion)
◆
Provide sufficient anti ‐ freeze capacity
Warning:
! To choose the anti ‐ freeze which is recommended and
approved by the qualified engine supplier is the
critical point to ensure engine’s normal running.
! Do not mix the anti ‐ freeze and anti ‐ rust of any types,
this will generate a large amount of bubble and
reduce the coolant’s performance.
! If the anti ‐ freeze used in the generator set is of bad
quality and not approved by the engine supplier,
which cause the malfunction of the generator set
(water leakage, contamination and etc.), this
malfunction(s) does not belong to the scope of
warranty.
2.6.2
Change of coolant
The effect of anti ‐ freeze and anti ‐ rust will decrease by
the time period of service. And therefore periodically
change of anti ‐ freeze is a must. The mixture of
anti ‐ freeze shall be changed in every two years. The
mixture of anti ‐ rust shall be changed at least one time
every year. And if filter of the coolant is installed, at
least this filter shall be changed in every half of year
(please refer to the engine operation manual for the
specific intervals of the changes required).
When it is time to discharge the coolant, make sure
the generator set has been shut down and the engine
has been fully cooled down, then open the radiator’s
liquid adding hole. After that open the discharge
valve installed in the radiator and in the engine
respectively to discharge the water. If the generator
set is furnished with coolant filter, it shall be
detached from the engine and be changed.
2.6.3
Cleaning of cooling system