SMA America, LLC
Opening and closing
Installation Guide
SB20_25_30HFUS-eng-IUS113711
67
8.3 Closing the SMA DC-Disconnect
Recheck all your connections to ensure that everything is in the right place and that all connections
and knockout fittings are secure and properly torqued. Check all of the knockout fittings of the
SMA DC-Disconnect to ensure that they are in place.
1. Check wire routing to ensure that no wires can interfere with proper sealing of the cover and
that no pressure will be exerted on the connections when the cover is replaced.
2. Carefully position the cover on the front of the SMA DC-Disconnect.
– Make sure that the switch handle snaps into place.
– Make sure that the upper edge of the SMA DC-Disconnect is covered by the lower edge of
the Sunny Boy.
– Make sure that the two screws in the cover are aligned correctly with the two threaded holes
in the enclosure.
3. While holding the cover in place, insert the two
screws into the threaded holes in the enclosure and
turn them until they are hand-tight. Be careful not to
cross-thread any of the screws. Do not use power
tools to fasten the screws.
4. Verify that the cover is in the correct position.
5. Tighten the cover screws to a torque of 53 in-lbs.
(6 Nm).
☑ The SMA DC-Disconnect is closed.
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