ABB HT611169 Operation Manual page 58

Operation Manual / TPL65-A32 / -A33 / -A36 + TPL69-A32 / -A33
5 Maintenance / 5.4 Cleaning turbine blades and nozzle ring in opera-
tion
© Copyright 2020 . All rights reserved.
Layout of cleaning pipes
Wet cleaning procedure for turbine during operation
Meet prerequisites and operating state requirements without fail be-
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fore cleaning!
Make sure water supply (01) is connected, turned on and guaranteed.
u
Open drain pipe (08, 09), if provided.
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Switch over 3-way valve (04) from scavenging air mode to water sup-
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ply.
Set the required volume of water on the flowmeter as shown in the
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table (see table Cleaning parameters).
Shut off the water supply again by switching the 3-way valve (04) to
u
scavenging air mode after injecting the required volume of water.
The injection process has been completed.
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Close drain hole (if provided) above drain pipe (08, 09).
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After cleaning, wait with engine running for at least 10 minutes
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without changing load to allow turbocharger to dry.
CAUTION
Corrosion damage to bearing casing
In order to avoid corrosion damage to the bearing casing, it is advisable
to carry out an additional 30 minutes of operation with TTE > 500°C
after the 10 minute drying time.
HZTL2498_EN Rev.F December 2020