18
PACMotion VFD AC Variable Speed Drive User Guide
GFK-3111A
Guidelines for Enclosure Mounting (IP20 Units)
• IP20 drives are suitable for use in pollution degree 1 environments, according to IEC-664-1. For pollution
degree 2 or higher environments, drives should be mounted in a suitable control cabinet with sufficient
ingress protection to maintain a pollution degree 1 environment around the drive.
• Enclosures should be made from a thermally conductive material.
• Ensure the minimum air gap clearances around the drive as shown below are observed when mounting
the drive.
• Where ventilated enclosures are used, there should be venting above the drive and below the drive to
ensure good air circulation. Air should be drawn in below the drive and expelled above the drive.
• In any environments where the conditions require it, the enclosure must be designed to protect the
PACMotion VFD against ingress of airborne dust, corrosive gases or liquids, conductive contaminants (such
as condensation, carbon dust, and metallic particles) and sprays or splashing water from all directions.
• High moisture, salt or chemical content environments should use a suitably sealed (non-vented) enclosure.
The enclosure design and layout should ensure that the adequate ventilation paths and clearances are left to
allow air to circulate through the drive heatsink. Emerson recommend the following minimum sizes for drives
mounted in non-ventilated metallic enclosures:
Figure 10: IP20 Adequate Mounting Clearances
Table 14: IP20 Adequate Mounting Clearances
Drive Size
X – Above & Below
Y – Either Side
Z – Between
Recommended airflow
mm
in
mm
in
mm
in
m3/min
CFM
2
75
2.95
10
0.39
46
1.81
0.3
11
3
100
3.94
10
0.39
52
2.05
0.9
31
4
200
7.87
25
0.98
70
2.76
1.7
62
5
200
7.87
25
0.98
70
2.76
2.9
104
6A
200
7.87
25
0.98
70
2.76
6B
200
7.87
25
0.98
70
2.76
8
350
11.81
50
3.94
412
16.22
20
705
NOTE
Dimension Z assumes that the drives are mounted side-by-side with no clearance.
Typical drive heat losses are <3% of operating load conditions.
Above are guidelines only and the operating ambient temperature of the drive MUST be maintained at all times.
