2 Installation
2.1 Planning the Installation Site
NOTE!
Before performing the installation, it is important to plan
the installation of the adjustable frequency drive.
Neglecting this may result in extra work during and after
installation.
Select the best possible operation site by considering the
following (see details on the following pages and the
respective Design Guides):
•
Ambient operating temperature
•
Installation method
•
How to cool the unit
•
Position of the adjustable frequency drive.
•
Cable routing
•
Ensure the power source supplies the correct
voltage and necessary current.
•
Ensure that the motor current rating is within the
maximum current from the adjustable frequency
drive.
•
If the adjustable frequency drive is without built-
in fuses, ensure that the external fuses are rated
correctly
Voltage [V] Altitude restrictions
380–500
At altitudes above 10,000 ft [3 km], contact Danfoss
regarding PELV
525–690
At altitudes above 6,600 ft [2 km], contact Danfoss
regarding PELV
Table 2.1 Installation in High Altitudes
2.2 Pre-Installation Check List
•
Before unpacking the adjustable frequency drive,
ensure the packaging is intact. If any damage has
occurred, immediately contact the shipping
company to claim the damage.
•
Before unpacking the adjustable frequency drive,
locate it as close as possible to the final instal-
lation site
•
Compare the model number on the nameplate to
what was ordered to verify the proper equipment
•
Ensure each of the following are rated for the
same voltage:
•
Line power
•
Adjustable frequency drive
•
Motor
•
Ensure that adjustable frequency drive output
current rating is equal to or greater than motor
full load current for peak motor performance
•
Motor size and adjustable frequency
drive power must match for proper
overload protection
•
If adjustable frequency drive rating is
less than motor, full motor output
cannot be achieved
2.3 Mechanical Installation
2.3.1 Cooling
•
Top and bottom clearance for air cooling must be
provided. Generally, 9 in [225 mm] is required.
•
Improper mounting can result in overheating and
reduced performance.
•
Derating for temperatures starting between 45
°
C
(113
°
F) and 50
°
C (122
°
F) and elevation 1,000 m
(3,300 ft) above sea level must be considered. See
VLT
®
Design Guide
for detailed information.
The high power adjustable frequency drives utilize a
backchannel cooling concept that removes heatsink
cooling air, which carries approximately 90% of the heat
out of the back channel of the adjustable frequency drives.
The backchannel air can be redirected from the panel or
room using one of the kits below.
Duct cooling
A backchannel cooling kit is available to direct the heatsink
cooling air out of the panel when an IP20/chassis
adjustable frequency drives is installed in a Rittal enclosure.
Use of this kit reduces the heat in the panel and smaller
door fans can be specified on the enclosure.
Cooling out the back (top and bottom covers)
The backchannel cooling air can be ventilated out of the
room so that the heat from the backchannel is not
dissipated into the control room.
Installation
VLT
®
HVAC Drive D-Frame
Instruction Manual
MG16D222 - VLT
®
is a registered Danfoss trademark
2-1
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