WÄRTSILÄ Vasa R22, Instruction Manual

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2 Reduce engine load to between 10 and 20% of full load
rating.
3 Open the valves (1), and check that they are not clogged.
4 Connect the water hose.
5 Open the drain valve (3) and check that it is clear of
block-age.
6 Open the valve (5) and valves (1) completely.
7 The pressure control valve (4) must be adjusted to a
pressure of 1 bar.
8 Check the water drains through the drain pipe.
9 Cleaning is terminated after about 10 min. The water
supply valve (5) is closed.
10 After termination of water injection the engine must run
for three minutes at constant load until all parts are dry.
11 Shut all valves and disconnect the hose to ensure that
no water can possibly enter the exhaust pipes except during
the cleaning periods.
12 Resume normal engine operation at higher output
and, as soon as possible, repeat the readings taken under step
1. for comparative purposes.
Water washing of the compressor side during operation, see
enclosed separate manual for the turbocharger.
15.2 Charge air cooler
15.2.1 Maintenance of charge air cooler
Condensate from the air is drained through a small pipe (6) at the
bottom of the cooler housing, after the insert. Exa-mine regularly
that the pipe is open by checking the air flow when running.
If water keeps on dripping or flowing from the draining pipe for
a longer period (unless running all the time in condi-tions with
very high humidity) the cooler insert may be leak and must be
dismantled and pressure tested.
At longer stops, the cooler should be either completely filled or
completely emptied, as a half-filled cooler increases the risk of
corrosion. If there is a risk of sinking water level in the system
15/III Turbocharging and Air Cooling 22-8604
15 - 4 VTR 161-251 Turbochargers