Specifications

Contents
1 How to Read this Design Guide
8
2 Introduction
14
2.1 Safety
14
2.2 CE Labelling
15
2.2.1 CE Conformity and Labelling 15
2.2.2 What Is Covered 15
2.2.3 Danfoss Frequency Converter and CE Labelling 15
2.2.4 Compliance with EMC Directive 2004/108/EC 16
2.3 Air Humidity
16
2.4 Aggressive Environments
16
2.5 Vibration and Shock
17
2.6 Safe Torque Off
17
2.6.1 Electrical Terminals 17
2.6.2 Safe Torque Off Installation 17
2.6.3 Approvals & Certificates 18
2.7 Advantages
19
2.7.1 Why Use a Frequency Converter for Controlling Fans and Pumps? 19
2.7.2 The Clear Advantage - Energy Savings 19
2.7.3 Example of Energy Savings 19
2.7.4 Comparison of Energy Savings 20
2.7.5 Example with Varying Flow over 1 Year 21
2.7.6 Better Control 21
2.7.7 Cos φ Compensation 21
2.7.8 Star/Delta Starter or Soft-starter not Required 21
2.7.9 Using a Frequency Converter Saves Money 22
2.7.10 Without a Frequency Converter 22
2.7.11 With a Frequency Converter 23
2.7.12 Application Examples 24
2.7.13 Variable Air Volume 24
2.7.14 The VLT Solution 24
2.7.15 Constant Air Volume 25
2.7.16 The VLT Solution 25
2.7.17 Cooling Tower Fan 26
2.7.18 The VLT Solution 26
2.7.19 Condenser Pumps 27
2.7.20 The VLT Solution 27
2.7.21 Primary Pumps 28
2.7.22 The VLT Solution 28
Contents VLT® HVAC Drive FC 102 Design Guide
MG16C102 - Rev. 2013-08-20 1