Operation Manual / 4 Product description / A100-M axial
6
Periodic maintenance
Page 49 / 113
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HZTL4033_EN
Revision A
July 2016
Switch the 3-way valve (04) from scavenging air mode to water supply.
Set the necessary water quantity on the flowmeter (08) according to the table Cleaning
parameters (see Table
Shut off the water supply again by switching the 3-way valve (04) to scavenging air mode
after the prescribed injection time has elapsed.
The injection process is complete.
After cleaning, continue to operate the engine for at least 10 minutes without any load
change.
It is necessary to have the corresponding water pipe pressure in order to achieve the correct
water flow rate (see Table
). If there is insufficient water pressure, the water flow rate speci-
fied in the table will not be achieved. A reduced cleaning effect can be expected in this case.
Repetition of wet cleaning
The repeating of cleaning cycles one immediately after the other must be avoided as this can
lead to excessive mechanical stress, hence reducing the operating life of the components.
If the cleaning process is ineffective, the duration can be extended. If the injection time is ex-
tended, it is important to ensure that no impermissible volume of water collects in the gas out-
let casing. A drainage system should be installed for the gas outlet casing and opened during
cleaning. If there is no drainage system, the amount of water injected can be monitored with a
flowmeter in the water supply. The permitted amount of water must be determined with the
help of an ABB Turbocharging Service Station.
To be observed during cleaning
The action of the cleaning water on the peripheral units (such as boiler) must be clarified
by the operator.
The exhaust gas temperature downstream of the turbocharger drops drastically during
cleaning (typical turbocharger outlet temperatures during cleaning: 60...180°C).
If there is no drainage of the gas outlet casing, the turbocharger speed and/or the gas inlet
temperature must be monitored during the cleaning process. If the load is too low, water
can collect in the gas outlet casing. Indicators for this are a sudden severe drop in the tur-
bocharger speed or a very large increase in the gas inlet temperature. In such cases, the
cleaning operations must be stopped and the cleaning cycle restarted with reduced water
pressure or higher engine load.
Cleaning parameters for wet cleaning of turbine and nozzle ring
Product
Maximum temperature
when starting cleaning
T
TI
[°C]
Injection time
t
i
[min]
Water volume flow per turbocharger at
p
Water
= 3 bar
V
W
[dm³/min]
A170-M
430
10
30
A175-M
41
Table 13: Cleaning parameters Wet cleaning of turbine and nozzle ring
