Commissioning 33
Closing and Fixing the PowerUnit
REFUsol 100K
982059/02
2020-11
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▷ Press the plug latching and insert the plug into the
connector socks, until it makes a clicking noise.
a)Start with the connecting of protective earth (PEN,
green/yellow).
b)Connect the AC and DC lines according to their
markings (DC-, DC+, L1, L2, and L3) to the
ConnectionBox.
Fig. 35: Cable connector
c) Connect the Ethernet cable of the ConnectionBox
adapter board (X6) to the digital input of the
PowerUnit (Digital Input/DRM 0).
d)Make sure that the plugs are engaged.
4.19 Closing and Fixing the PowerUnit
1. Carefully press the PowerUnit in its intended place
and hold it. Make sure that the cables are not
pinched or damaged when closing.
2. Tighten the M8 screws hand-tight.
3. Tighten all four M8 bolts crosswise with a tightening
torque of 20 Nm.
5 Commissioning
5.1 Before Startup
✅ The first commissioning is based on the locally
applicable installation regulations.
▷ Check the polarity and voltage of each string con-
nected.
5.2 Startup
▷ Close AC switch (if present).
▷ Close DC switch.
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