Danfoss VLT HVAC Drive FC 100 Operating Instructions Manual page 25

®
VLT HVAC DRIVE High Power
Operating Instruction
Illustration 3.18: Position of earth terminals IP21 (NEMA type 1) and IP54 (NEMA type 12)
Cooling
Cooling can be obtained 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 the cooling possibilities.
Airflow
The necessary airflow over the heat sink must be secured. The flow rate is shown below.
IP21 / NEMA 1 &
IP54 / NEMA 12
IP00 / Chassis
Table 3.2: Heatsink Air Flow
Enclosure
D1 and D2
E1
D3 and D4
E2
MG.11.F1.02 - VLT ® is a registered Danfoss trademark
Door fan / Top fan Airflow over heat-
airflow
170 m 3 /h (100 cfm) 765 m
340 m 3 /h (200 cfm) 1444 m
255 m 3 /h (150 cfm) 765 m
3
255 m /h (150 cfm) 1444 m
3. How to Install
sink
3 /h (450 cfm)
3 /h (850 cfm)
3 /h (450 cfm)
3
/h (850 cfm)
25
3