WT304 – Smart Thermostat for 2/4 Pipe Fan Coils – Milesight
General Description
Milesight 's WT304 is a smart thermostat designed for 2-pipe and 4-pipe fan coil units (FCUs) with multi-speed or EC (0-10V) fans. It combines precise temperature and humidity control with advanced features such as open window detection, frost protection, local scheduling, and compatibility with LoRaWAN® and Milesight D2D protocols. Its 2.7" E-ink display ensures optimal readability with low power consumption.
Targeted Applications
- Temperature control in commercial or residential buildings
- Regulation of 2 or 4-pipe fan coil units
- Connected energy management projects via LoRaWAN®
- Hotel solutions with card detection (digital entry)
Highlights
- 2-tube and 4-tube FCU support, EC or 1-3 speed fans
- High-precision CMOSens® temperature and humidity sensors
- Advanced functions: scheduling, antifreeze, open window detection
- 2.7" black and white E-ink display
- LoRaWAN® Class C and Milesight D2D connectivity
- NFC or USB Type-C configuration
Technical Specifications
Wireless Transmission |
Technology |
LoRaWAN®, Milesight D2D |
Frequencies |
CN470 / EU868 / RU864 / IN865 / AU915 / US915 / KR920 / AS923-1/2/3/4 |
Transmit power |
16 dBm (868 MHz) / 19 dBm (470 MHz) / 22 dBm (915 MHz) |
Sensitivity |
-137 dBm |
Fashion |
OTAA / ABP – Class C |
Thermostat Features |
Compatibility |
2 and 4-tube FCUs with EC fans (0-10V) or 1–3 speeds |
Types of valves |
0–10V proportional, motorized On/Off 2 or 3 wires |
Temperature modes |
Heating, Cooling, Ventilation |
Ventilation modes |
Low, Medium, High, Auto |
Entrances |
1 × NTC 10kΩ, 1 × DI (dry contact for card switch) |
Advanced functions |
Local planning, frost protection, open window detection, fan delay, dehumidification |
Integrated Sensors |
Temperature – Range |
-20°C to +60°C |
Temperature – Accuracy |
±0.5°C (0 to 60°C), ±1°C (-20 to 0°C) |
Temperature – Resolution |
0.1°C |
Humidity – Beach |
0% to 100% RH |
Humidity – Accuracy |
±2% RH typ., ±5% RH max. |
Humidity – Resolution |
0.1% RH |
Display & Configuration |
Display |
2.7" black & white E-ink display |
Buttons |
5 physical buttons (On/Off, Temp +/–, modes, reset) |
Indicator |
1 × reset/reboot LED |
Configuration |
NFC via mobile app or USB Type-C |
Physical Characteristics |
Food |
100–240 VAC, 50/60 Hz |
Operating temperature |
-20°C to +60°C (Screen: 0°C to +40°C) |
Relative humidity |
0% to 95% (non-condensing) |
Protection index |
IP20 |
Material and color |
PC + ABS (UL94 V0), white |
Dimensions |
86 × 86 × 42 mm |
Facility |
86 mm square or 60 mm round wall box – 118/120 plates optional |
Login |
AWG 14–26 wires |
Interfaces and Connectors
The WT304 features an E-ink display and five buttons for complete local control (system, temperature, modes). It can be configured via NFC or USB Type-C. It supports EC or multi-speed fans as well as various types of valves.
Pack Contents
- 1 × WT304 Smart Thermostat
- 1 × User Guide
- 1 × Wall Mounting Kit