SMA America, LLC Electrical connection
Installation Guide SB30-40US-IUS103030 59
6.9 Closing the Sunny Boy
1. Ensure that all connections and knockout fittings are properly torqued.
2. Ensure that no wires can interfere with proper sealing of the cover. Check that no pressure will
be exerted on the connections when the cover is replaced.
3. Locate the four screws and lock washers you removed to take the cover off. Make sure you have
all four screws and lock washers. All of this hardware is necessary to ensure proper grounding
and a weather-tight seal.
4. Ensure that the seal on the inside of the cover is undamaged and in correct position.
5. Carefully position the cover on the front of the inverter.
Align the four holes in the cover with the four threaded
holes in the case.
NOTICE
Humidity can ingress, when mounting and installing the inverter.
Damage to the Sunny Boy will result.
• Ensure no moisture is trapped inside the enclosure when securing the lid.
CAUTION
Be careful not to misplace the screws or the lock washers that attach the cover to the case,
as all four screws and lock washers are required to ensure that the cover is grounded
properly and is fully sealed to the case. Handle the cover carefully, as even minor damage
to the cover could result in an inadequate seal between the cover and the case, thus
allowing moisture to enter the case and damage the sensitive electronic components.
For proper grounding, the teeth of the washers must face towards the lid.
Do not cross-thread any of the screws.
Do not use power tools to start the screws.
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