The Elta 149-TCK7 is a versatile 7‑day time clock designed for scheduling and controlling ventilation and HVAC equipment. It operates on 220 – 240VAC 50Hz and allows programming via 15-minute captive segments for detailed weekly scheduling. Suitable for fan loads up to 3A, the unit can be mounted on surface, panel, or DIN rail setups. It features a manual override with automatic return to the programmed schedule, and a contact status display for easy operation monitoring. A 100-hour battery reserve ensures program retention during power interruptions.