Table 19: Cleaning Parameters Hp; Table 20: Cleaning Parameters Lp; Table 21: Holding Time - ABB PT004165 Operation Manual

Operation Manual / Power2 850-M / High-pressure stage
7 Periodic maintenance / 7.3 Cleaning turbine and nozzle ring during
operation
2. Cleaning the high-pressure turbine stage (HP stage)
If present, open the drain pipe in the low-pressure stage during cleaning.
u
Switch the 3-way valve during cleaning from scavenging air to water supply.
u
Carry out the cleaning process with cleaning parameters according to the specifications
u
in the following table.
Power2 Water flow rate
[l/min]
850 HP 20.0 ±1.0
Table 19: Cleaning parameters HP
For an optimum cleaning result, the water flow rate adopted when designing the cleaning
process should be set via the corresponding control valves and monitored by a flowmeter. If
this is not possible, the specified water pressure at the cleaning connection of the tur-
bocharger is to be set as a rough approximation.
3. Cleaning the low-pressure turbine stage (LP stage)
If present, open the drain pipe in the low-pressure stage during cleaning.
u
Switch the 3-way valve during cleaning from scavenging air to water supply.
u
Carry out the cleaning process with cleaning parameters according to the specifications
u
in the following table.
Power2 Water flow rate
[l/min]
850 LP 20.0 ±1.0
Table 20: Cleaning parameters LP
For an optimum cleaning result, the water flow rate adopted when designing the cleaning
process should be set via the corresponding control valves and monitored by a flowmeter. If
this is not possible, the specified water pressure at the cleaning connection of the tur-
bocharger is to be set as a rough approximation.
4. Drying phase
Maintenance of the holding time according to the specifications in the following table
u
and subsequent adjustment of the desired engine operating point.
Power2
850
Table 21: Holding time
Repetitions 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 compon-
ents.
The action of the cleaning water on the peripheral units (such as boiler) must be clarified by
the operator.
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Water pressure
(guideline value)
[bar]
3.0
Water pressure
(guideline value)
[bar]
1.5
Holding time at reduced load
[min]
≥10
HZTL4063_EN
Duration of water injection
[min]
10
Duration of water injection
[min]
10
Rev.F March 2022