Rev. 09/2020 3
1 General Information .....................................................................................................5
1.1 What Is the Purpose of these Assembly Instructions?.................................................5
1.2 Who Are these Assembly Instructions Targeted to?....................................................5
1.3 What Symbols Are Used in the Assembly Instructions? ..............................................5
1.4 Which Abbreviations/Acronyms Are Used in the Assembly Instructions?.....................6
2 Safety Instructions ......................................................................................................7
2.1 General Safety Instructions ..................................................................................... 7
2.2 Electrostatic Discharge Hazards ..............................................................................8
2.3 Special Safety Instructions for the Device ................................................................8
2.4 Proper Transport .................................................................................................. 10
2.5 Proper Storage ..................................................................................................... 10
2.6 Proper Disposal.................................................................................................... 10
3 Intended Use ............................................................................................................. 11
3.1 Functional Description ...........................................................................................11
3.2 Applications......................................................................................................... 13
4 Product Description ................................................................................................... 15
4.1 Technical Data ...................................................................................................... 15
4.1.1 Certifications ..................................................................................................... 15
4.1.2 Mechanical Data ................................................................................................ 16
4.1.3 Warning Notices on the Device............................................................................ 17
4.1.4 Product Identification – Labeling on the Device.................................................... 18
4.1.5 Overview Drawings............................................................................................. 19
4.1.6 Pole Connector Stepper Motor / Encoder .............................................................26
4.1.7 Digression: Direct Control of Stepper Motor ......................................................... 27
5 Installation Instructions............................................................................................ 28
5.1 Unpacking............................................................................................................28
5.2 Assembly .............................................................................................................29
5.2.1 Install Flow Body................................................................................................ 31
5.2.2 Install VariFuel2/2+ into Intake Section .............................................................. 33
5.2.3 Connect Stepper Motor Driver............................................................................. 35
6 Operation ..................................................................................................................36
6.1 Start-up ...............................................................................................................36
7 Errors........................................................................................................................ 38
7.1 Special Tools for Troubleshooting ..........................................................................38
7.2 Possible Faults .....................................................................................................38
Table of Contents
