9 Opening and Closing SMA America, LLC
62 SB30-40-US-IA-en-33 Installation Manual
4. Turn the rotary switch of the DC Disconnect to the
Off position.
5. Tighten the screw on the right-hand side of the
rotary switch. Use a cross-head screwdriver for this.
6. Attach the conical spring washer on the screw of
the DC Disconnect. Here, the grooved side of the
conical spring washer must point to the screw head.
7. Insert the screw and conical spring washer into the
underside of the DC Disconnect and tighten the
screw (torque: 44 in-lb. (5 Nm)). Ensure that the
toothing of the conical spring washer points
towards the cover.
☑ The teeth of the conical spring washer press into
the cover of the DC Disconnect. This grounds the
cover.
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