Requirements For Ip20 - Danfoss VLT AHF 005 Design Manual

Requirements for Installati...
NOTICE
IP00 - FORCED AIR REQURIED
When mounting IP00 versions, pay attention to the
specific requirements for cooling and ventilation. Ensure
that the minimum required forced air speed and air
volume are observed as part of the installation of IP00
versions in panels. See Table 4.2 and Table 4.3 for details.
NOTICE
OVERHEATING OF FILTER
In wide and/or deep cabinets, there is a risk that the
airflow bypasses the filter. The bypass overheats the
filter, which can lead to equipment damage. To avoid
bypassing of air:
•
Install air baffles to control the airflow when
using IP00 filters.
Observe the minimum required forced air speed and air
volume, see chapter 4.1.4.2 Requirements for IP00.
When mounting the filters in panels or other industrial
enclosures, ensure that there is a sufficient airflow through
the filter to reduce the risk of overheating the filter and
the surrounding components.
If other heat sources (such as frequency converters) are
installed in the same enclosure, also consider the heat they
generate when dimensioning the cooling of the enclosure.

4.1.4.1 Requirements for IP20

To guide air through the gap between the wall and the
filter, mount the filters on a wall. In installations, for
example panels, where the filter is mounted on rails, the
filter is not sufficiently cooled because of false airflow. To
overcome the false airflow, order a backplate (thickness:
2 mm (0.08 in)), shown in Illustration 4.2. See Table 5.10 for
ordering number.
MG80C502
Design Guide
Illustration 4.1 Correct Airflow without Backplate
1
Illustration 4.2 Correct Airflow with Backplate
1
Illustration 4.3 False Airflow
Danfoss A/S © 10/2016 All rights reserved.
1
Backplate - 2 mm (0.08 in) thickness
1
False airflow
4 4
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