WÄRTSILÄ 41508, Инструкция по эксплуатации

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19.1.6 Monitoring
The temperatures mentioned in chapter 01., section 01.2, should not
be exceeded.
H t a nd LT pressures aft er the pumps ca n be checked from the local
display unit. The pressures depend on th e speed a nd t he insta llat ion.
Ala rms a re set for low H T a nd L T pressure a nd for high H T w a ter outlet
a fter t he engine. Gu ida nce va lues, see cha pter 01., section 01.2.
The HT w a ter outlet aft er the engine is provided with a n a lar m switch
(3) a nd a stop switch. Main engines ar e provided with a lar m sw itches
for low HT and LT pressure.
For furt her informa tion, see cha pter 23.
19.2 Maintenance
19.2.1 General
The insta llat ion — including expan sion, ventin g, preheat ing, pressur-
izing — should be carried out strictly according to the instructions of
the engine manufacturer to obtain correct and troublefree service.
The cooling wa ter should be tr eat ed a ccording to th e recommend a -
tions in cha pter 02., section 02.3, t o prevent corrosion a nd deposits.
If risk of frost occurs, dra in all cooling wa ter spa ces. Avoid cha nging
the cooling w a ter. Sa ve the discha rged w at er an d use it a gain.
19.2.2 Cleaning
In completely closed sy stems th e fouling w ill be minima l if the cooling
w a ter is t reat ed a ccording t o our inst ructions in cha pter 02., section
02.3. Depending on th e cooling w a ter q ua lity a nd t he efficiency of th e
tr ea tm ent, t he cooling w a ter spa ces w ill foul more or less in th e course
of time. Deposits on cylinder liners, cylinder heads and cooler stacks
should be removed a s th ey ma y disturb t he heat tr a nsfer to the cooling
w a ter a nd thus cause serious dama ge.
The need of clean ing should be exa mined, especia lly during th e first
year of operation. This may be done through one of the plugs in the
engine block or by overh a uling a cylinder liner a nd checking for fouling
a nd d eposits on liner a nd block. The cylinder h ead cooling w a ter spa ces
may be checked by opening the lower large plugs on the sides of the
cylinder h ea ds. The tu rbocha rgers ca n be checked th rough t he covers
of th e w a ter spa ce an d t he coolers by r emoving th e wa ter boxes of th e
inlet wa ter.
The deposits can be of th e most va rious st ructur es a nd consist encies.
In principle, th ey can be removed mecha nically a nd/or chemica lly a s
34SG-9501 Cooling Water System, V-engines