TF228WN digital thermostat is designed for 3-speed fan and valve control in a fan coil system, including: 2-pipe cool only/heat only/manual changeover Ventilation mode Manual or automatic 3-speed fan control Water valve control DESCRIPTION SPECIFICATION: Power Supply: 220(+10%,-15%)VAC, 50Hz Accuracy: ±1°C at 21°C Rating Capacity: 3A for fan load, 2A for zone valve Protection Class: IP20 Set point range 10 ~ 32°C Display range 0 ~ 37°C Ambient operating limits 0~ +49°C Humidity limits 5~90% RH, non-condensing Packing: Bulk Packing