2.3 Air Circulation/Cooling
The drive must be installed in a way that allows for free
airflow. However short circuiting the airflow (warm air re-
entering the drive’s cooling fan) must be avoided (see
). A clearance of 5 inches (12.7 cm) must be
observed in both ends of the drive chassis. Install the drive
in a location where coldest possible air can be drawn into
the drive, i.e. from the bottom part of an outdoor unit.
Counter flow (static pressure) must not restrict the
operation of the internal cooling fan of the drive.
175ZB043.10
Illustration 2.8 Wrong Drive Airflow
2.4 Condensation and Dripping Water
The printed circuit board assembly of the drive is
conformally coated and thus sufficiently protected against
condensation during off time. Nevertheless, the drive
should not be exposed to dripping water (rain) or
condensing water slung around by the condenser fan. In
outdoor units, it is recommendable to install the drive in a
rain proof compartment.
2.5 Vibration and Mechanical Resonances
The mechanical structure (sheet metal) carrying the drive
must be designed to withstand vibration and consequently
resonances induced by the compressor or condenser fan.
See vibration specification for the drive further down this
document.
Also refer to
explaining the
possibility to program bypass frequencies in the drive to
avoid mechanical resonances of the structure.
Mechanical Installation
VLT
®
Inverter Scroll CDS 801 Operating Instructions
12
MG10V402 - VLT
®
is a registered Danfoss trademark
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