Specifications

3. The frequency converter 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 complete 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 only CE labeled components are
chosen, the entire system does not have to be
tested.
2.2.3 Danfoss Frequency Converter and CE
Labeling
CE labeling is a positive feature when used for its original
purpose, that is, to facilitate trade within the EU and EFTA.
However, CE labeling may cover many different specifi-
cations. 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 feeling of
security when using a frequency converter as a component
in a system or an appliance.
Danfoss CE labels the frequency converters in accordance
with the low-voltage directive. This means that if the
frequency converter is installed correctly, Danfoss
guarantees 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 installation 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 instal-
lation to ensure EMC-correct installation. Furthermore,
Danfoss specifies which our different products comply
with.
Danfoss provides other types of assistance that can help to
obtain the best EMC result.
2.2.4
Compliance with EMC Directive
89/336/EEC
As mentioned, the frequency converter 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. As an aid to 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, if the EMC-correct
instructions for installation are followed.
2.3 Air Humidity
The frequency converter has been designed to meet the
IEC/EN 60068-2-3 standard, EN 50178 9.4.2.2 at 50 °C.
2.4 Aggressive Environments
A frequency converter contains many mechanical and
electronic components. All are to some extent vulnerable
to environmental effects.
CAUTION
The frequency converter should not be installed in
environments with airborne liquids, particles, or gases
capable of affecting and damaging the electronic
components. Failure to take the necessary protective
measures increases the risk of stoppages, thus reducing
the life of the frequency converter.
Liquids can be carried through the air and condense in the
frequency converter and may cause corrosion of
components and metal parts. Steam, oil, and salt water
may cause corrosion of components and metal parts. In
such environments, use equipment with enclosure rating
IP54. As an extra protection, coated printed circuit boards
can be ordered as an option. (Standard on some power
sizes.)
Airborne particles such as dust may cause mechanical,
electrical, or thermal failure in the frequency converter. A
typical indicator of excessive levels of airborne particles is
dust particles around the frequency converter fan. In dusty
environments, use equipment with enclosure rating IP54 or
a cabinet for IP20/TYPE 1 equipment.
In environments with high temperatures and humidity,
corrosive gases such as sulphur, nitrogen, and chlorine
compounds causes chemical processes on the frequency
converter components.
Such chemical reactions rapidly affects and damages the
electronic components. In such environments, mount the
equipment in a cabinet with fresh air ventilation, keeping
aggressive gases away from the frequency converter.
An extra protection in such areas is a coating of the
printed circuit boards, which can be ordered as an option.
Product Overview
VLT
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HVAC Basic Drive FC 101 Design Guide
MG18C502 - Rev. 2013-09-06 11
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