Fuji Electric FRENIC-ECO - Screw Count and Tightening Torque

2-3
To utilize external cooling for inverters with a capacity of 40HP for 208V, 50HP for 460V or above, change the
position of the top and bottom mounting bases from the edge to the center of the inverter as illustrated in Figure
2.3.
Screws differ in size, length and count for each inverter. Be sure to refer to the table below.
Table 2.3 Screw Count and Tightening Torque
Power
supply
voltage
Inverter type
Base fixing screw
(Count)
Case fixing screw
(Count)
Tightening torque
(N
•m)
Refer to:
3-phase
208 V
FRN040F1S-2U to
FRN100F1S-2U
M6 × 20
(3 pcs each for upper
and lower sides)
M6 × 12
(3 pcs for upper side)
5.8
FRN050F1S-4U to
FRN150F1S-4U
M6 × 20
(3 pcs each for upper
and lower sides)
M6 × 12
(3 pcs for upper side)
5.8
Figure A
3-phase
460 V
FRN200F1S-4U to
FRN350F1S-4U
M6 × 20
(2 pcs each for upper
and lower sides)
M5 × 16
(4 pcs each for upper
and lower sides)
M6 × 20
(2 pcs each for upper
and lower sides)
M5 × 12
(4 pcs each for upper
and lower sides)
5.8
3.5
Figure B
For models shown in Figure A
1) Remove all of the base fixing screws from the top and bottom of the inverter. Also remove the case fixing
screws from the top. (The case fixing screws are not necessary in external cooling. Store them for future
use. On the bottom are no case fixing screws.)
2) Secure the top mounting base to the center of the inverter with the base fixing screws, using case fixing
screw holes.
3) Secure the bottom mounting base to the center of the inverter with the base fixing screws.
For models shown in Figure B
1) Remove all of the base fixing screws from the top and bottom of the inverter. Also remove the case fixing
screws.
2) Secure the top mounting base to the center of the inverter with the base fixing screws, using case fixing
screw holes. Set the removed case fixing screws to the screw holes where the top mounting bases were
secured.
3) In the same way, secure the bottom mounting base to the center of the inverter.