Danfoss VLT AutomationDrive FC 302 Instruction Manual page 13

Mechanical Installation
Redirect the backchannel air from the panel or room by
using:
•
Duct cooling. A backchannel cooling kit is
available to direct the heatsink cooling air out of
the panel when an IP20/chassis adjustable
frequency drive 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.
NOTICE!
A door fan(s) is required on the enclosure to remove the
heat not contained in the backchannel of the adjustable
frequency drive. It also removes any additional losses
generated by other components inside the adjustable
frequency drive. Calculate the total required air flow so
that the appropriate fan(s) can be selected.
Secure the necessary airflow over the heatsink. The flow
rate is shown in Table 3.2.
Frame Door fan/top fan
D1h/D3h/D5h/D6h 102 m
3
/hr (60 CFM)
D2h/D4h/D7h/D8h 204 m
3 /hr (120 CFM) 840 m
Table 3.2 Airflow
Lifting
Always lift the adjustable frequency drive using the
dedicated lifting eyes. Use a bar to avoid bending the
lifting holes.
MG34U422
Instruction Manual
Figure 3.2 Recommended Lifting Method
RISK OF INJURY OR DEATH
The lifting bar must be able to handle the weight of the
adjustable frequency drive to ensure that it does not
break during lifting.
Heatsink fan
3
420 m /hr (250 CFM)
3 /hr (500 CFM)
Failure to follow recommendations could result in death
or serious injury.
Mounting
1.
2.
3.
4.
5.
Danfoss A/S © 06/2015 All rights reserved.
WARNING
•
See chapter 8.9 Power Ratings, Weight and
Dimensions for the weight of the different
enclosure types.
•
Maximum diameter for bar: 2.5 cm (1 inch).
•
The angle from the top of the adjustable
frequency drive to the lifting cable: 60° or
greater.
Ensure that the strength of the mounting location
supports the unit weight.
Place the unit as near to the motor as possible.
Keep the motor cables as short as possible.
Mount the unit vertically to a solid flat surface to
provide cooling airflow. Ensure free space for
cooling.
Ensure the access to open the door.
Ensure the cable entry from the bottom.
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