NEC S2500 User Manual page 80

4. On the right side of the rack, install the other rail in the same manner.
5. Lift the unit, put the rear section on the rails, and push it into the rack.
NOTE: The unit is very heavy. It is recommended that 3 people
assist in lifting and installing the unit. If less than three persons
are involved, personal injury may occur. Be careful not to
drop the unit while lifting.
Fasten the four set screws at the two left and two right points on the front of the unit. The
figure below only shows the right part of the unit. Fix the left part of the unit similarly.
Set screws
D-4
Set screws