SMA Sunny Central 250U Installation Manual page 57

SMA America, LLC
3. Tip the front plate of the enclosure with two persons
in such way, that the upper edge of it points
towards the Disconnect Unit. Hook the front plate of
the enclosure into the two mounting clamps at the
front of the Disconnect Unit.
4. Push the bottom edge of the front plate of the
enclosure to the Disconnect Unit.
5. For every handle of the switches in front of the front plate of the enclosure: slightly shake the
handle a few times so that the shaft of the switch snaps into the handle.
6. Attach the front plate of the enclosure to the
Disconnect Unit at its 4 corners with 4 screws and
4 seal washers. Fasten the screws hand-tight so that
the front plate of the enclosure can be moved.
7. Insert 1 screw with seal washer in every hole and
fasten the screws hand-tight. The 3 holes behind the
left handles are not reachable yet.
8. Make sure that the front plate of the enclosure is
aligned to the edges of the Disconnect Unit. Fasten
all screws with a torque of 53 in-lbs. (6 Nm).
Installation Guide
6 Electrical connection
DisconACDC_SCUS-IUS103110 57