ABB MNS-SG Operation And Maintenance Manual page 17

5. Place the L-profile rail at the side-edge of the section that
will be closed. Attach the L-profile using four M6 x 16
screws. Torque to 3.5 ft/lbs (4.7 Nm).
Top Cover
End Cover
Top cover – rear exhaust
6. Install the rear cover on top of the cable compartment
using 10 M6-1 x16 bolts, washers and nuts. Torque to 3.5
ft/lbs (4.7 Nm).
7. If the lifting angles are still in place, remove the angles
that interfere with the cover(s) and replace the bolts.
! WARNING
DO NOT remove the top cover of cable compartment
section that has the rear cover attached to it.
NOTE: For 31.5 in (800 mm) or 39.4 in (1,000 mm) wide
sections, install a rear-plenum transition to compensate for
the width difference to the rear extension.
Gap in section of 800mm and 1000mm
Rear Cover
8. Attach the extension connection to switchgear frame with
four M6 x 16 screws, and to the top cover with 10 M6 x 16
bolts, using the supplied washers and nuts for each bolt.
Torque all to 3.5 ft/lbs (4.7 Nm).
Rear Cover
Top Cover
Top cover – rear exhaust
9. Attach the end flaps to connect the plenum to the exterior
vent hole. Connect the end flaps using 14 M61 x 16 bolts,
washers and nuts. [Torque to 3.5 ft/lbs (4.7 Nm)].
Rear extension connection
Rear Cover
Top Cover
Manual | MNS-SG Operation and Maintenance 17
Rear extension connection
M6 x 16 Bolt
washer and nut
End Cover
M6 x 16 Screw
Extension
End Cover
End flaps
End Flaps