Danfoss VLT FC 300 Instruction Manual page 30

3. How to Install
3
3.18: Position of ground terminals IP 21 (NEMA type 1) and IP 54 (NEMA type 12)
Cooling
Cooling can be performed in different ways: by using the cooling ducts in the bottom and the top
of the unit, by using the ducts in the rear of the unit or by combining cooling options.
Airflow
The necessary airflow over the heatsink must be ensured. The flow rate is shown below.
IP 21 / NEMA 1 &
IP 54 / NEMA 12
IP 00 / Chassis
3.2: Heatsink Air Flow
30
Enclosure
D1 and D2
E1
D3 and D4
E2
MG.33.U1.22 - VLT ® is a registered Danfoss trademark.
VLT
Instruction Manual High Power
Door fan/Top fan Airflow over heat-
airflow
3 3
6,003 ft /h [170 m /h] 27,015 ft
(100 cfm) h] (450 cfm)
3 3
12,006 ft /h [340 m / 50994 ft
h] (200 cfm) h] (850 cfm)
9,005 ft 3 /h [255 m 3 /h] 27,015 ft
(150 cfm) h] (450 cfm)
9,005 ft 3 /h [255 m 3 /h] 50994 ft
(150 cfm) h] (850 cfm)
® Automation Drive FC 300
sink
3 3
/h [765 m /
3 3
/h [1444 m /
3 /h [765 m 3 /
3 /h [1444 m 3 /