LG Multi V Water IV - Electrical Connections: IDU Communication Cable; ARWN Series Daisy-Chain Communication Wiring; ARWB Series Daisy-Chain Communication Wiring

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Electrical System Installation
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Figure 73: Multi V Water IV ARWN Series Heat Pump System—Daisy-Chain Communications Cable Wiring.
Note:
Communications cables must be 18 gauge, stranded, shielded, and grounded at the water source unit(s) only.
Maintain polarity throughout the communication network.
Figure 74: Multi V Water IV ARWB Series Heat Recovery System—Daisy-Chain Communications Cable Wiring.
IDU Communication Cable
ELECTRICAL CONNECTIONS
CEN B
IDU AIDU B
SODU A
Connect 2-Wire Communication Cable
to IDU B and IDU A Terminals in WSU
CEN B
IDU AIDU B
SODU A
Connect 2-Wire Communication Cable
to IDU B and IDU A Terminals in WSU
HR Unit
IDU Communication Cable
Refer to Figure 73 and Figure 74. Connect the communication control cables between the master WSU and the IDUs.