3. Tighten all six screws with an Allen key (AF 3) in
the order 1 to 6 (torque: 2.0 Nm ± 0.3 Nm). By
tightening the screws in the prescribed order,
you avoid warping the enclosure lid, which
would keep it from sealing correctly.
Useful hint: If the screws fall out of the lower
enclosure lid, insert the long screw into the lower
middle hole and the five short screws into the
other holes.
4. Set the DC load-break switch to the position
O
so that both mounting screws are visible.
5. Insert the DC load-break switch firmly into the recess on the inverter. During this process, the
DC load-break switch must still be in the position
O
and aligned so that the screws are
positioned over the threads.
6. Fasten the two screws using an Allen key (AF 3)
(torque: 2 Nm ± 0.2 Nm).
7. Turn the DC load-break switch to the position
I
.
7 Commissioning
SMA Solar Technology AG
Operating Manual
STP20-25TL-BE-en-11
34
