Electrical Installation - Danfoss FC 300 Design Manual

6. How to Install
6.2.3. 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.
6
6.2.4. Field Mounting
For field mounting the IP 21/IP 4X top/TYPE 1 kits or IP 54/55 units are recommended.

6.3. Electrical Installation

Aluminum Conductors
Terminals can accept aluminum conductors, but the conductor surface must be clean, and the
oxidation must be removed and sealed by neutral acid-free Vaseline grease before the conductor
is connected.
Furthermore, the terminal screw must be retightened after two days due to the softness of the
aluminum. It is crucial to keep the connection a gas-tight joint, otherwise the aluminum surface
will oxidize again.
108
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
NOTE
Cables General
All cabling must comply with national and local regulations on cable cross-sections
and ambient temperature. Copper (140°-167° F [60°/75° C]) conductors are rec-
ommended.
MG.33.B9.22 - VLT
.
Derating for Ambient Temperature
® is a registered Danfoss trademark.
FC 300 Design Guide
does not
and that the 24-hour
.