ABB PT004165 Operation Manual page 54

Operation Manual / Power2 850-M / High-pressure stage
7 Periodic maintenance / 7.2 Cleaning the compressor during operation
7.2.2 Principle of wet cleaning
Principle of wet cleaning
To clean the compressor stage during operation, water is injected before the compressor
wheel.
The water does not act as a solvent. The coating is removed by the mechanical action of the
impacting droplets. The process is particularly suitable as long as the contamination is not
too advanced.
CAUTION
Corrosion and deposits when cleaning
Salt water and cooling water treatment substances damage and adversely
affect parts of the low-pressure and high-pressure stage.
Never use salt water, but only pure water for cleaning.
u
CAUTION
Volume of water
Uncontrolled volumes of water can damage the pressure stages and the en-
gine.
Never connect the water line without the orifice specified for the low-
u
pressure and high-pressure stages.
Compressor surging
Should repeated surging of the compressor stage occur during compressor cleaning, first
the cleaning parameters (water flow rate) as well as the engine-side system must be
checked with regard to deviations (e.g. an increased pressure loss in the charge air cooler)
and corrected if necessary.
If surging of the compressor stage continues to occur during compressor cleaning despite
correct settings, this can be remedied by reducing the engine load further during cleaning of
the compressor after consulting a Turbo Systems service station. The reduction of the en-
gine load can lead to a reduction in the effectiveness of the compressor cleaning.
© Copyright 2022 ABB. All rights reserved. HZTL4063_EN Rev.F March 2022