MADEL KCA‑SUB zoning control module: wiring, functions and professional applications

The MADEL KCA‑SUB is an electronic zoning controller designed to manage up to six independent air‑conditioning zones from a single ducted unit. The image shows the KCA‑SUB installed in a junction box with its power, relay and sensor terminals visible, offering HVAC technicians a compact and versatile solution for sub‑zone…