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<strong>MAN</strong> B&W 18.06<br />
Other Alarm Functi<strong>on</strong>s<br />
Drain Box for Fuel Oil Leakage Alarm<br />
Any leakage from the fuel oil high pressure pipes<br />
of any cylinder <str<strong>on</strong>g>is</str<strong>on</strong>g> drained to a comm<strong>on</strong> drain box<br />
fitted with a level alarm. <str<strong>on</strong>g>Th<str<strong>on</strong>g>is</str<strong>on</strong>g></str<strong>on</strong>g> <str<strong>on</strong>g>is</str<strong>on</strong>g> included for both<br />
Attended Machinery Space (AMS) and Unattended<br />
Machinery Space (UMS).<br />
Bearing C<strong>on</strong>diti<strong>on</strong> M<strong>on</strong>itoring<br />
Based <strong>on</strong> our experience we decided in 1990 that<br />
all plants, whether c<strong>on</strong>structed for AMS or for<br />
UMS, must include an oil m<str<strong>on</strong>g>is</str<strong>on</strong>g>t detector specified<br />
by <strong>MAN</strong> <strong>Diesel</strong>. Since then an Oil M<str<strong>on</strong>g>is</str<strong>on</strong>g>t Detector<br />
(OMD) and opti<strong>on</strong>ally some extent of Bearing<br />
Temperature M<strong>on</strong>itoring (BTM) equipment have<br />
made up the warning arrangements for preventi<strong>on</strong><br />
of crankcase explosi<strong>on</strong>s <strong>on</strong> two-stroke engines.<br />
Both warning systems are approved by the classificati<strong>on</strong><br />
societies.<br />
In order to achieve a resp<strong>on</strong>se to damage faster<br />
than possible with Oil M<str<strong>on</strong>g>is</str<strong>on</strong>g>t Detecti<strong>on</strong> and Bearing<br />
Temperature M<strong>on</strong>itoring al<strong>on</strong>e we introduce Bearing<br />
Wear M<strong>on</strong>itoring (BWM) systems. By m<strong>on</strong>itoring<br />
the actual bearing wear c<strong>on</strong>tinuously, mechanical<br />
damage to the crank-train bearings (main-,<br />
crank- and crosshead bearings) can be predicted<br />
in time to react and avoid damaging the journal<br />
and bearing housing.<br />
If the oil supply to a main bearing fails, the bearing<br />
temperature will r<str<strong>on</strong>g>is</str<strong>on</strong>g>e and in such a case a Bearing<br />
Temperature M<strong>on</strong>itoring system will trigger<br />
an alarm before wear actually takes place. For<br />
that reas<strong>on</strong> the ultimate protecti<strong>on</strong> against severe<br />
bearing damage and the optimum way of providing<br />
early warning, <str<strong>on</strong>g>is</str<strong>on</strong>g> a combined bearing wear and<br />
temperature m<strong>on</strong>itoring system.<br />
For all types of error situati<strong>on</strong>s detected by the<br />
different bearing c<strong>on</strong>diti<strong>on</strong> m<strong>on</strong>itoring systems<br />
applies that in additi<strong>on</strong> to damaging the comp<strong>on</strong>ents,<br />
in extreme cases, a r<str<strong>on</strong>g>is</str<strong>on</strong>g>k of a crankcase<br />
explosi<strong>on</strong> ex<str<strong>on</strong>g>is</str<strong>on</strong>g>ts.<br />
Oil M<str<strong>on</strong>g>is</str<strong>on</strong>g>t Detector<br />
Page 1 of 5<br />
The oil m<str<strong>on</strong>g>is</str<strong>on</strong>g>t detector system c<strong>on</strong>stantly measures<br />
samples of the atmosphere in the crankcase compartments<br />
and reg<str<strong>on</strong>g>is</str<strong>on</strong>g>ters the results <strong>on</strong> an optical<br />
measuring track, where the opacity (degree<br />
of haziness) <str<strong>on</strong>g>is</str<strong>on</strong>g> compared with the opacity of the<br />
atmospheric air. If an increased difference <str<strong>on</strong>g>is</str<strong>on</strong>g> recorded,<br />
a slow down <str<strong>on</strong>g>is</str<strong>on</strong>g> activated (a shut down in<br />
case of German<str<strong>on</strong>g>is</str<strong>on</strong>g>cher Lloyd).<br />
Furthermore, for shop trials <strong>on</strong>ly <strong>MAN</strong> <strong>Diesel</strong> requires<br />
that the oil m<str<strong>on</strong>g>is</str<strong>on</strong>g>t detector <str<strong>on</strong>g>is</str<strong>on</strong>g> c<strong>on</strong>nected to<br />
the shut down system.<br />
Four alternative oil m<str<strong>on</strong>g>is</str<strong>on</strong>g>t detectors are <str<strong>on</strong>g>available</str<strong>on</strong>g>:<br />
4 75 161 Oil m<str<strong>on</strong>g>is</str<strong>on</strong>g>t detector Graviner MK6.<br />
Make: Kidde Fire Protecti<strong>on</strong><br />
4 75 163 Oil m<str<strong>on</strong>g>is</str<strong>on</strong>g>t detector V<str<strong>on</strong>g>is</str<strong>on</strong>g>atr<strong>on</strong> VN 215/93.<br />
Make: Schaller Automati<strong>on</strong><br />
4 75 165 Oil m<str<strong>on</strong>g>is</str<strong>on</strong>g>t detector QMI.<br />
Make: Quality M<strong>on</strong>itoring Instruments Ltd.<br />
4 75 166 Oil m<str<strong>on</strong>g>is</str<strong>on</strong>g>t detector MD-SX.<br />
Make: Daihatsu <strong>Diesel</strong> Mfg. Co., Ltd.<br />
4 75 167 Oil m<str<strong>on</strong>g>is</str<strong>on</strong>g>t detector V<str<strong>on</strong>g>is</str<strong>on</strong>g>i<strong>on</strong> III C.<br />
Make: Specs Corporati<strong>on</strong><br />
Diagrams of the two of them are shown for reference<br />
in Figs. 18.06.01a and 18.06.01b.<br />
<strong>MAN</strong> B&W MC/MC-C, ME/ME�C/ME�GI/ME-B engines 198 45 87�5.7<br />
<strong>MAN</strong> <strong>Diesel</strong>