User's Manual

4. Commissioning
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4.2.4. Grounding (Earthing)
The RU must be grounded (earthed).
1. Connect an earth-bonding cable to the grounding bolt connection provided on the
outside of the unit (near the Mains connector) as shown in figure 4-17. Do not
use the grounding connection to connect external devices.
figure 4-17 Grounding bolts figure 4-18 Grounding bolt, schematic view
2. After loosening the hex nut(s), connect the earth-bonding cable between the two
washers as illustrated in the figures above.
3. Then, fasten all parts again by tightening the hex nut(s).
4. Connect the other end of the ground wire to a suitable permanent ground
following local electrical code practices.