EAS ELECTRIC ECH R32 Serie Manual De Instalación Y Usuario página 73

8.5.13 Wiring instances
If multiple units are connected in parallel, the user needs to set uint address on the DIP switches.
The DIP switch address is ENC4. With 0-F being valid, 0 indicates the main unit and 1-F indicate auxiliary units.
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Fig. 8-18 Networking communication schematic of main unit and auxiliary unit for ECH030NHR
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