ufacturer's instructions for use must be strictly observed. Prior to cleaning,
check whether the cleaning agent is suitable for the materials to be cleaned.
The products listed in the table entitled
Cleaning agents for removing lime-
scale and rust deposits
are also suitable for stainless steel.
Manufacturer
Product
Concentration
Duration of cleaning procedure/temperature
Drew
SAF-Acid
Descale-IT
Ferroclean
5 – 10 %
5 – 10 %
10 %
4 h at 60 – 70 °C
4 h at 60 – 70 °C
4 – 24 h at 60 – 70 °C
Nalfleet
Nalfleet 9 - 068
5 %
4 h at 60 – 75 °C
Unitor
Descalex
5 – 10 %
4 – 6 h at approx. 60 °C
Vecom
Descalant F
3 – 10 %
ca. 4 h at 50 – 60 °C
Table 2: Cleaning agents for removing lime scale and rust deposits
Hydrochloric acid diluted in water or aminosulphonic acid may only be used
in exceptional cases if a special cleaning agent that removes limescale
deposits without causing problems is not available. Observe the following
during application:
▪
Stainless steel heat exchangers must never be treated using diluted
hydrochloric acid.
▪
Cooling systems containing non-ferrous metals (aluminium, red bronze,
brass, etc.) must be treated with deactivated aminosulphonic acid. This
acid should be added to water in a concentration of 3 – 5 %. The tem-
perature of the solution should be 40 – 50 °C.
▪
Diluted hydrochloric acid may only be used to clean steel pipes. If hydro-
chloric acid is used as the cleaning agent, there is always a danger that
acid will remain in the system, even when the system has been neutral-
ised and flushed. This residual acid promotes pitting. We therefore rec-
ommend you have the cleaning carried out by a specialist.
The carbon dioxide bubbles that form when limescale deposits are dissolved
can prevent the cleaning agent from reaching boiler scale. It is therefore
absolutely necessary to circulate the water with the cleaning agent to flush
away the gas bubbles and allow them to escape. The length of the cleaning
process depends on the thickness and composition of the deposits. Values
are provided for orientation in the table entitled
Cleaning agents for removing
limescale and rust deposits
.
The cooling system must be flushed several times once it has been cleaned
using cleaning agents. Replace the water during this process. If acids are
used to carry out the cleaning, neutralise the cooling system afterwards with
suitable chemicals then flush. The system can then be refilled with water that
has been prepared accordingly.
Only carry out cleaning procedure with cooled engine
Only begin the cleaning procedure when the engine has cooled down.
Hot engine parts may not come into contact with cold water. After
refilling the cooling system, open the venting pipes. Blocked venting
pipes prevent the air from escaping and may cause thermal overload
of the engine.
In emergencies only
Following cleaning
Quality guidelines (conventional and Common Rail engines)
Quality guidelines (conventional and Common Rail engines)
General
2016-09-08 - de
010.000.002-04
MAN Diesel & Turbo
2 (3)
M010.000.002-04-0001 EN
Summary of Contents for L23/30DF
Page 1: ...L27 38S Project Guide Power Plant Four stroke GenSet...
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Page 9: ...MAN Diesel Turbo I 00 Introduction Page 1 1 I 00 Introduction 2018 04 13 en...
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Page 31: ...MAN Diesel Turbo D 10 General information Page 1 1 D 10 General information 2018 04 13 en...
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Page 59: ...MAN Diesel Turbo B 10 Basic diesel engine Page 1 1 B 10 Basic diesel engine 2018 04 13 en...
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Page 85: ...MAN Diesel Turbo B 11 Fuel oil system Page 1 1 B 11 Fuel oil system 2018 04 13 en...
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Page 173: ...MAN Diesel Turbo B 13 Cooling water system Page 1 1 B 13 Cooling water system 2018 04 13 en...
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Page 207: ...MAN Diesel Turbo B 14 Compressed air system Page 1 1 B 14 Compressed air system 2018 04 13 en...
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Page 227: ...MAN Diesel Turbo B 16 Exhaust gas system Page 1 1 B 16 Exhaust gas system 2018 04 13 en...
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Page 269: ...MAN Diesel Turbo B 17 Speed control system Page 1 1 B 17 Speed control system 2018 04 13 en...
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Page 293: ...ENGINE AUTOMATION MAN Diesel Turbo SE SaCoSone GENSET System description Revision 1 5...
Page 306: ...MAN Diesel Turbo SaCoSone GENSET SaCoSone GENSET Communication from GenSet Revision 1 7...
Page 309: ...MAN Diesel Turbo Table of Contents...
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Page 327: ...MAN Diesel Turbo B 20 Foundation Page 1 1 B 20 Foundation 2018 04 13 en...
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Page 335: ...MAN Diesel Turbo B 21 Test running Page 1 1 B 21 Test running 2018 04 13 en...
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Page 341: ...MAN Diesel Turbo E 23 Spare parts Page 1 1 E 23 Spare parts 2018 04 13 en...
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Page 351: ...MAN Diesel Turbo P 24 Tools Page 1 1 P 24 Tools 2018 04 13 en...
Page 379: ...MAN Diesel Turbo B 50 Alternator Page 1 1 B 50 Alternator 2018 04 13 en...
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