LFA/S 2.1 Fan Coil Actuator Manual

This document describes the ABB STOTZ-KONTAKT LFA/S 2.1 fan coil actuator, which controls 3- or 5-step fans and valves for heating/cooling systems via the ABB i-bus® EIB/KNX. It supports multiple system configurations (2-, 3-, or 4-wire), offers four operating modes (frost/heat protection, night, comfort, standby), and provides up to 8 outputs with a rated current of 6 A.