Air Humidity; Aggressive Environments - Danfoss VLT AQUA Drive FC 202 Design Manual

Introduction
appliances, and systems that are CE labelled
under the EMC directive.
3. The frequency converter is sold as part of a
complete system, such as an air-conditioning
system. The entire system must be CE labelled in
accordance with the EMC directive. The
manufacturer can ensure CE labelling under the
EMC directive either by using CE labelled
components or by testing the EMC of the system.
If the manufacturer chooses to use only CE
labelled components, there is no need to test the
entire system.
2.3.3 Danfoss Frequency Converter and CE
Labelling
CE labelling is a positive feature when used for its original
purpose, which is to facilitate trade within the EU and
EFTA.
CE labelling can cover many different specifications, so
check the CE label to ensure that it covers the relevant
applications.
Danfoss CE labels the frequency converters in accordance
with the low-voltage directive, meaning 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 labelling in accordance with the low-voltage
directive.
The CE label also applies if following the instructions for
EMC-correct installation and filtering.
Detailed instructions for EMC-correct installation are found
in . Furthermore, Danfoss specifies which standards our
products comply with.
2.3.4 Compliance with EMC Directive
2004/108/EC
The primary users of the frequency converter are trade
professionals, who use it as a complex component forming
part of a larger appliance, system, or installation. 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. If the EMC-correct
instructions for installation are followed, the standards and
test levels stated for power drive systems are complied
with. See chapter 2.11 Immunity Requirements.

2.4 Air Humidity

The frequency converter has been designed to meet the
IEC/EN 60068-2-3 standard, EN 50178 pkt. 9.4.2.2 at 50 °C.
MG20Z202
Design Guide

2.5 Aggressive Environments

A frequency converter contains many mechanical and
electronic components. All are to some extent vulnerable
to environmental effects.
CAUTION
The frequency converter must 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.
Degree of protection as per IEC 60529
The safe stop function can only be installed and operated
in a control cabinet with degree of protection IP54 or
higher (or equivalent environment) to avoid cross faults
and short circuits between terminals, connectors, tracks,
and safety-related circuitry caused by foreign objects.
Liquids can be carried through the air and condense in the
frequency converter and can cause corrosion of
components and metal parts. Steam, oil, and salt water can
cause corrosion of components and metal parts. In such
environments, use equipment with enclosure rating IP54/
IP55. As an extra protection, coated printed circuit boards
can be ordered as an option.
Airborne Particles such as dust can 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/
IP55 or a cabinet for IP00/IP20/NEMA 1 equipment.
In environments with high temperatures and humidity,
corrosive gases such as sulphur, nitrogen, and chlorine
compounds cause chemical processes on the frequency
converter components.
Such chemical reactions damage the electronic
components quickly. 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.
NOTICE
Mounting frequency converters in aggressive
environments increases the risk of stoppages and consid-
erably reduces the life of the converter.
Before installing the frequency converter, check the
ambient air for liquids, particles, and gases by observing
existing installations in this environment. Typical indicators
of harmful airborne liquids are water or oil on metal parts,
or corrosion of metal parts.
Danfoss A/S © Rev. 06/2014 All rights reserved.
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