Reliable mechanical control switch for central air-conditioning terminals — designed for commercial and residential buildings. Controls terminal coil motors and water valves to manage heating and cooling with simple manual operation and automatic temperature logic. Key benefits Reliable operation: Mechanical control plus solid-state logic ensures the measured temperature is compared to the set temperature for consistent comfort control. Flexible installation: Supports multiple wiring schemes to match existing terminal unit wiring — single-line (valve stop, fan continues) or double-line (valve stop, fan stop). Long service life: Temperature controller contacts are rated to operate fully loaded at 220V for over 100,000 cycles; the manual switch exceeds 60,000 cycles. Clear temperature range: Stable control in the constant temperature range of 10–30°C for typical indoor applications. Main functions and compatibility Controls coil motors and water valves at the end of central air-conditioning systems to switch between heating and cooling modes. Logic circuit continuously compares measured temperature with the user-set temperature and actuates the valve or motor accordingly. Compatible with terminal units in both commercial and civil (residential) buildings where central AC terminal control is required. Performance and durability Contacts tested for heavy-duty switching at 220V with a rated life beyond 100,000 operations. Manual switch durability rated above 60,000 operations, delivering reliable manual override and long-term use. Designed to maintain stable control within the 10–30°C constant temperature band. Practical applications (examples) Office buildings: Zone-by-zone terminal control for conference rooms and workspaces, using single-line wiring when the fan should remain on during valve stops. Hotels and multi-room hospitality: Guestroom terminal units where automatic temperature logic maintains setpoints and double-line wiring can be used to stop the fan when the valve closes. Residential complexes and mixed-use buildings: Central AC terminal control for apartments or common areas, providing durable, low-maintenance operation for coil motors and water valves. Why choose this controller Proven mechanical reliability combined with an automatic temperature comparison circuit. Flexible wiring options to fit different terminal unit configurations. High switching endurance under 220V load for reduced maintenance and fewer replacements. Operation note Supports single-line (valve stop, fan not stop) and double-line (valve stop, fan stop) wiring; verify wiring choice with your terminal unit requirements before installation.