Diesel Generator Coolant Maintenance
by Starlight Generator dieselgeneratortechCoolant
The gen set coolant has
the following three functions:
A, provides sufficient
heat transfer capability;
B, prevents all metal
materials in the cooling system from rusting;
C, provides adequate
frost protection.
The coolant can be
composed of water and antifreeze or a mixture of water and rust preventive.
Among them, the PH of water should be between 6.5 and 8, and pure water is
usually recommended. Do not use water alone as coolant. In areas where there is
a risk of freezing, the coolant should contain 40% to 60% antifreeze. When the
antifreeze content is 40%, the freezing point can be reduced to -25°C. When the
antifreeze content is 60%, it can be reduced
to -56°C. It is suggested that the users use a mixture of 50% antifreeze
(ethylene glycol) and 50% purified water, and should be separately prepared in
an independent container, and then mixed
evenly before adding to the water tank. It is not recommended to add more than 60%
antifreeze to the coolant, otherwise it will reduce the antifreeze protection
of the diesel generator set. It is recommended to use ethylene glycol as
antifreeze.
Anti-rust liquid should
be used instead of antifreeze in areas where there is no risk of icing. When
the mixing ratio of the anti-rust liquid and the purified water is about 1:30,
the anti-rust effect can be achieved, and the cooling efficiency of the unit
will not be reduced. After adding the anti-rust liquid, the unit should be run
to the heat engine state in order to obtain the best anti-corrosion protection.
Glycol is recommended as the unit anti-rust liquid.
Do not mix any type of
antifreeze with rust preventive and other additives, as this will reduce the
cooling efficiency by producing a large amount of foam. Antifreeze and
anti-rust liquid are dangerous. Do not drink them. Avoid contact with skin and
eyes. Do not use alcohol in the cooling system.
Coolant
drain
When using ambient
temperature <5°C or long-term shutdown, must use the antifreeze approved by
the engine manufacturer, add it according to the proportion, or drain the
coolant. The discharge sequence is: cooling water tank → body → circulating
water pump →
(intercooler) →
(water jacket preheater). Different models have different water discharge
points.
Coolant
replacement
The coolant should be
replaced at least once every six months to avoid degradation of cooling
performance due to precipitation in the cooling system. Another reason for
replacing the coolant is to avoid the risk of corrosion of the generating set,
as over time the rust will reduce the effectiveness of the additive and disable
the water temperature sensor.
When replacing the
coolant, the system should be flushed with clean water first. When cleaning, be
sure to wait for the flushed water to be very clean.
The coolant should not
be added until the diesel engine is shut down and completely cooled. Do not
open the filler cap when the engine temperature is still high, except in an
emergency. Otherwise steam or high temperature coolant may be ejected.
To
add coolant to the tank, take note of the following:
A, before adding coolant
to the cooling system, make sure that the drain cap is closed and the drain
plug is in the correct position.
B, do not add coolant to
the system too quickly to avoid bubble faults in the system.
C, air must be exhausted
through a vent or through a filling hole. If the cooling system is connected to
a heater, the heater control valve must be opened and the unit should be
ventilated during injection.
D, when injecting the
coolant, the liquid level should be 5 cm below the weld surface of the filler
plug.
E, after the coolant is
added, care should be taken to start and preheat the unit. Also check the
coolant level and fill it up if necessary.
F, the same coolant
contained in the original cooling system should be added to the water tank.
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Created on Oct 10th 2019 22:35. Viewed 302 times.