T6861 Vertical Digital Thermostat

T6861 Vertical Digital Thermostats are designed for application of 3-speed fan and valves in fan coil system. Manual or automatic 3-speed fan control water valve control. It has super modern appearance design, suitable for office, hotel and residential building. If energy saving mode activated by dry contact, all buttons will be locked except the multi-key for ISU. System will have a fixed dead band set in ISU between heating and cooling set points for Automatic Change over (ACO) configured thermostats. While the heating and cooling set points determine the dead band. Thermostat acquires the room temperature via its integrated sensor or external temperature sensor and maintains the set point by delivering on/off valve control commands output. Fan can be selected as manual or automatic 3-speed operation. In Manual mode, the fan is switched to the selected speed via control output Gh, Gm, Gl. While in automatic mode, fan speed depends on the difference between room temperature and set point. When room temperature reaches set point, valve will be closed and meanwhile, fan will be closed either.

• Cycle per Hour (CPH) function
• Adjustment of display room temperature
• Temperature unit either °C or °F
• User setting can be kept when power off
• Freezing protection function available
• Lock or unlock keys or part of keys in Installer Set-up
• Heat and cool set point limitation for energy saving
• Time on/off function
• Manual or automatic fan speed selection
• Remote temperature sensor available