Danfoss VLT Series Design Manual page 94

5. How to Install
5.1.2. Mechanical mounting
1.
2.
The adjustable frequency drive allows side-by-side installation. Because of the need for cooling,
allow for a minimum of 3.9 in [100 mm] free air passage above and below the adjustable frequency
drive.
The back wall must always be solid.
5
5.1.3. Safety Requirements of Mechanical Installation
The adjustable frequency drive is cooled by air circulation.
To protect the unit from overheating, it must be ensured that the ambient temperature
exceed the maximum temperature stated for the adjustable frequency drive,
average temperature
the paragraph
If the ambient temperature is in the range of 113°-131° F [45°-55° C], derating of the adjustable
frequency drive will become relevant, see
The service life of the adjustable frequency drive is reduced if derating for ambient temperature
is not taken into account.
5.1.4. Field Mounting
For field mounting, the IP 21/IP 4X top/TYPE 1 kits or IP 54/55 units (planned) are recommended.
94
Drill holes in accordance with the measurements given.
You must provide screws suitable for the surface on which you want to mount the ad-
justable frequency drive. Retighten all four screws.
Pay attention to the requirements that apply to integration and the field mounting
kit. Follow the information in the list to avoid serious damage or injury, especially
when installing large units.
is not exceeded
. Locate the maximum temperature and 24-hour average in
Derating for Ambient Temperature
MG.11.B4.22 - VLT
.
Derating for Ambient Temperature
® is a registered Danfoss trademark.
VLT ® HVAC Drive Design Guide
does not
and that the 24-hour
.