Danfoss VLT Series Design Manual page 17

VLT ® HVAC Drive Design Guide
3.
2.2.3. Danfoss VLT Adjustable Frequency Drive and CE Labeling
CE labeling is a positive feature when used for its original purpose, i.e. to facilitate trade within
the EU and EFTA.
However, CE labeling may cover many different specifications. Thus, you must check what a given
CE label specifically covers.
The covered specifications can be very different and a CE label may therefore give the installer a
false sense of security when using an adjustable frequency drive as a component in a system or
an appliance.
Danfoss CE labels the adjustable frequency drives in accordance with the low-voltage directive.
This means that if the adjustable frequency drive is installed correctly, we guarantee compliance
with the low-voltage directive. Danfoss issues a declaration of conformity that confirms our CE
labeling in accordance with the low-voltage directive.
The CE label also applies to the EMC directive provided that the instructions for EMC-correct in-
stallation and filtering are followed. On this basis, a declaration of conformity in accordance with
the EMC directive is issued.
The Design Guide offers detailed instructions for installation to ensure EMC-correct installation.
Furthermore, Danfoss specifies which our different products comply with.
Danfoss gladly provides other types of assistance that can help you obtain the best EMC result.
2.2.4. Compliance with EMC Directive 89/336/EEC
As mentioned, the adjustable frequency drive is mostly used by professionals of the trade as a
complex component forming part of a larger appliance, system or installation. It must be noted
that the responsibility for the final EMC properties of the appliance, system or installation rests
with the installer. To assist the installer, Danfoss has prepared EMC installation guidelines for the
Power Drive system. The standards and test levels stated for power drive systems are complied
with, provided that the EMC-correct instructions for installation are followed; see the section
Electrical Installation
unit must comply with the basic EMC requirements of the directive. This is ensured by
using components, appliances and systems that are CE-labeled under the EMC directive.
The adjustable frequency drive is sold as part of a complete system. The system is being
marketed as complete and could, for example, be an air-conditioning system. The com-
plete system must be CE-labeled in accordance with the EMC directive. The manufacturer
can ensure CE-labeling under the EMC directive either by using CE-labeled components
or by testing the EMC of the system. If he chooses to use only CE-labeled components,
he does not have to test the entire system.
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MG.11.B4.22 - VLT ® is a registered Danfoss trademark.
2. Introduction to the VLT HVAC Drive
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