Bühler technologies Nivotemp NT 61 - Default Chapter; Table of Contents

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Nivotemp NT 61, NT 61-HT, NT 63, NT 63-

LTD/Nivovent NV 71, NV 73

Contents

1 Introduction..................................................................................................................................................................................................................... 2

1.1 Intended Use.........................................................................................................................................................................................................2

1.2 Functionality......................................................................................................................................................................................................... 2

1.2.1 Liquid level monitoring ......................................................................................................................................................................2

1.2.2 Temperature monitor .........................................................................................................................................................................2

1.3 Design types.......................................................................................................................................................................................................... 3

1.4 Model key NT61 .................................................................................................................................................................................................... 3

1.5 Model key NT61-HT..............................................................................................................................................................................................4

1.6 Model key NT63....................................................................................................................................................................................................4

1.7 Model key NV71 .................................................................................................................................................................................................... 5

1.8 Model key NV73.................................................................................................................................................................................................... 5

1.9 Scope of Delivery..................................................................................................................................................................................................6

2 Safety instructions......................................................................................................................................................................................................... 7

2.1 Important advice................................................................................................................................................................................................. 7

2.2 General hazard warnings .................................................................................................................................................................................8

3 Transport and storage ..................................................................................................................................................................................................9

4 Setup and connection................................................................................................................................................................................................. 10

4.1 Installation ..........................................................................................................................................................................................................10

4.2 Information on the correct operation of reed contacts in Bühler level switches............................................................................ 11

4.3 Adjusting level contacts (NT61, NV71 only)................................................................................................................................................. 12

4.4 Settings..................................................................................................................................................................................................................13

5 Operation and control ................................................................................................................................................................................................ 14

6 Cleaning and Maintenance........................................................................................................................................................................................15

6.1 Replacing the filter element............................................................................................................................................................................15

6.2 Adding small amounts of oil...........................................................................................................................................................................15

7 Service and repair......................................................................................................................................................................................................... 16

7.1 Spare parts and accessories ........................................................................................................................................................................... 16

8 Disposal............................................................................................................................................................................................................................17

9 Appendices..................................................................................................................................................................................................................... 18

9.1 Technical Data NT 61......................................................................................................................................................................................... 18

9.2 Technical Data NT 61-HT.................................................................................................................................................................................. 19

9.3 Technical Data NT 63....................................................................................................................................................................................... 20

9.4 Technical Data NV 71......................................................................................................................................................................................... 21

9.5 Technical Data NV 73 ........................................................................................................................................................................................22

9.6 Dimensions NV 71..............................................................................................................................................................................................23

9.7 Dimensions NV 73..............................................................................................................................................................................................24

9.8 Standard pin assignment NT 61, NT 61-HT.................................................................................................................................................25

9.9 Standard pin assignment NV 71....................................................................................................................................................................27

9.10 Standard pin assignment NT 63, NV 73.......................................................................................................................................................29

9.11 Standard pin assignment NT 63-LTD...........................................................................................................................................................30

9.12 Standard pin assignment NV 73 ....................................................................................................................................................................31

9.13 Definitions...........................................................................................................................................................................................................32

10 Attached documents................................................................................................................................................................................................... 33

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