VAT 651 Series - Page 4

Series
651
4/99 Edition 2014-07-10 605451EC
4.6.2 Tuning of pressure control performance with fixed PI control .......................... 56
4.6.3 Tuning of pressure control with soft pump ....................................................... 59
5 Operation ........................................................................................... 62
5.1 Normal operation ........................................................................................................... 62
5.1.1 Local operation ................................................................................................ 63
5.1.2 Remote operation ............................................................................................ 64
5.2 Close valve .................................................................................................................... 65
5.3 Open valve..................................................................................................................... 65
5.4 Position control .............................................................................................................. 65
5.5 Pressure control ............................................................................................................. 65
5.5.1 Operation with 2 sensors ................................................................................. 66
5.6 Display information ........................................................................................................ 67
5.6.1 Power up ......................................................................................................... 67
5.6.2 Operation ........................................................................................................ 68
5.6.3 Errors .............................................................................................................. 68
5.6.4 Safety mode .................................................................................................... 68
5.6.5 Service indication ............................................................................................ 69
5.7 Operation during power up ............................................................................................ 69
5.8 Behavior in case of power failure ................................................................................... 69
5.9 Operation under increased temperature ........................................................................ 70
5.10 Behavior In case of compressed air pressure drop ........................................................ 70
6 Trouble shooting .............................................................................. 71
7 Maintenance ...................................................................................... 73
7.1 Maintenance intervals .................................................................................................... 73
7.2 Maintenance procedures ............................................................................................... 74
7.2.1 Replacement of isolation seals and cleaning .................................................. 75
7.2.2 Replacement of actuator shaft seals ............................................................... 78
7.2.3 Replacement of Option board ......................................................................... 83
7.2.4 Retrofit / replacement procedure ..................................................................... 85
8 Repairs .............................................................................................. 88
9 Dismounting and Storage ................................................................ 89
9.1 Dismounting ................................................................................................................... 89
9.2 Storage .......................................................................................................................... 90
10 Packaging and Transport ................................................................. 91
10.1 Packaging ...................................................................................................................... 91
10.2 Transport ....................................................................................................................... 92
11 Disposal ............................................................................................. 93
12 Spare parts ........................................................................................ 94
12.1 Drawing ......................................................................................................................... 94
12.1.1 Valve unit with seals and grease ..................................................................... 95
12.1.2 Control and actuating unit ............................................................................... 96
12.1.3 Accessories ..................................................................................................... 97
13 Appendix ........................................................................................... 98