Installation Guide

5. If you replace a Connection Unit with a built-in Energy Meter, disconnect the RS485
connector from the inverter communication board.
6.
Unscrew the two conduit nuts in the Primary Unit securing the Connection Unit to
it, see Figure 50 .
7. Open the Connection Unit cover and disconnect the DC, AC and communication
wires. Unscrew the two conduit nuts securing the Connection Unit to the external
conduits.
8. Release the Connection Unit bracket from the wall.
9. Carefully remove the Connection Unit with its mounting bracket from the wall.
Installing a New Connection Unit
1. Position the new Connection Unit below the inverter and from the inside of the
Primary Unit grab the AC and DC wires extending from the switch conduits.
2. Securely screw the two conduit nuts onto the conduit ends in the inverter.
3. Attach the Connection Unit with its bracket to the wall and tighten its screw.
Connecting the Connection Unit to the Primary Unit
1. Connect the DC, as follows, see Figure 49 :
Connect the red wire to any of the DC+ terminals in the inverter.
Connect the black wire to any of the DC- terminals in the inverter.
2. Connect the communication wire to the communication board.
3.
Connect the AC wires according to the labels on the ACterminal blocks, as follows:
Three Phase Inverter
Wire type Connect to terminal
Figure 51: Primary Unit AC terminals
Line 1 L1
Line 2 L2
Line 3 L3
PE (grounding)
Neutral N
4. Tighten the screws of each terminal with a torque of 0.88-1.1 lb.*ft / 1.2-1.5 N*m.
Appendix D: Replacing System Components 97
Three Phase Inverter with Synergy Technology Installation MAN-01-00401-1.5