Operation Manual / Power2 340-H / Low-pressure stage
Table of contents
© Copyright 2022 ABB. All rights reserved. HZTL4053_EN Rev.F March 2022
6.2 Service work................................................................................................................. 47
6.3 Expected replacement intervals .............................................................................. 49
6.4 Stopping the engine.................................................................................................... 51
7 Periodic maintenance.......................................................................................... 52
7.1 Foreword to maintenance......................................................................................... 52
7.2 Cleaning the compressor during operation .......................................................... 53
7.3 Cleaning the filter silencer ........................................................................................ 56
7.4 Cleaning turbine and nozzle ring during operation .............................................. 57
8 Troubleshooting................................................................................................... 58
8.1 Malfunctions when starting...................................................................................... 58
8.2 Malfunctions during operation ................................................................................ 59
8.3 Surging of the low-pressure or high-pressure stage .......................................... 63
8.4 Malfunctions when stopping.................................................................................... 64
8.5 Speed measurement system.................................................................................... 65
9 Disassembly and assembly................................................................................. 66
9.1 Introduction ................................................................................................................. 66
9.2 Material required......................................................................................................... 67
9.3 Weights of assemblies............................................................................................... 69
9.4 Removing the gas outlet casing and gas outlet flange....................................... 70
9.5 Removing the air inlets ............................................................................................... 71
9.6 Measuring radial clearances N and R ....................................................................... 72
9.7 Removing the compressor casing............................................................................ 73
9.8 Pressing off the casing ............................................................................................... 75
9.9 Removing the cartridge group................................................................................. 76
9.10 Removing the nozzle ring .......................................................................................... 78
9.11 Installing the cartridge group on the service support ........................................ 79
9.12 Measuring clearance A and B.................................................................................... 80
9.13 Nozzle ring compression PD...................................................................................... 81
9.14 Installing the nozzle ring ........................................................................................... 82
9.15 Installing the cartridge group .................................................................................. 83
9.16 Installing the compressor casing ............................................................................ 85
9.17 Measuring radial clearances N and R ...................................................................... 87
9.18 Installing the air inlets ............................................................................................... 88
9.19 Installing the gas outlet flange ................................................................................ 89
9.20 Installing the gas outlet casing................................................................................ 90
9.21 Table of tightening torques....................................................................................... 91
10 Taking out of operation at short notice ........................................................... 92
10.1 Possible emergency repairs...................................................................................... 92
10.2 Installing a replacement cartridge group .............................................................. 93
10.3 Fitting the cover plate................................................................................................ 94
10.4 Cover plate drawing ................................................................................................... 95
11 Mothballing the low-pressure stage ................................................................. 96
11.1 Taking the engine out of operation for up to 12months ................................... 96
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