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ER/U 1.1 Electronic Relay Installation and Operating Instructions

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This document provides installation and operating instructions for the ABB i-bus KNX electronic relay (ER/U 1.1), a flush-mounting device used to control thermal actuators in single-room hot-water heating systems via a universal interface. It includes safety warnings, technical data, connection diagrams, and mounting guidelines for integration into a KNX building automation system.

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