SMA Solar Technology AG
Installation Guide
SB50US-80US-IUS094030
67
Use the following procedure to replace the cover on the Sunny Boy:
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. Locate the six screws and lock washers you removed to take the cover off the Sunny Boy. Make
sure you have all six screws and lock washers, as all of this hardware is necessary to ensure
proper grounding and a weather-tight seal.
3. Check the seal on the inside of the cover to ensure it is undamaged and in the correct position.
4. Carefully position the cover on the front of the
Sunny Boy so that the six holes in the cover are
aligned correctly with the six threaded holes in the
case.
5. While holding the cover in place, carefully insert
the six screws with lock washers through the holes
in the cover into the threaded holes in the case and
turn them until they are finger-tight. Be careful not to
cross-thread any of the screws. Do not use power
tools to start the screws.
6. Verify that the cover is in the correct position and
that the seal is in place between the case and the
cover.
7. Tighten the cover screws to a torque of 53 in-lbs. (6
Nm).
CAUTION!
Be careful not to misplace the screws or the lock washers that attach the cover to the case,
as all six 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.
Be sure when reinstalling the six screws that the
lock washers are installed correctly. The teeth of
the washers should face towards the lid.
