6321 Series Room Temperature Controller and Multifunctional Control Element Manual

This document is a multilingual installation and operating manual for the Busch-Jaeger 6321 series room temperature controllers and multifunctional control elements (models 6321/38-...-500 and 6321/58-...-500) with integrated bus coupler and IR receiver for KNX systems. It covers intended use, technical data, mounting instructions, commissioning via ETS 4.0, operation modes (comfort, standby, frost protection, ECO, etc.), display symbols, and fan coil control for heating and cooling applications.