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Milesight

Smart fan coil thermostat

Milesight WT303-868M is a smart LoRaWAN thermostat designed to control 2- and 4-pipe FCU fan coil units with 3-speed fans. It supports 2- and 3-wire ON/OFF motorised valves in 2-pipe installations and 2-wire ON/OFF valves in 4-pipe installations.

The WT303 features a 2,7-inch E-Ink display, built-in temperature and humidity measurement, an input for an external NTC sensor, and a digital input for applications such as a hotel key card or reed switch. Local schedules, open-window detection, freeze protection, Milesight D2D, and LoRaWAN Class C communication enable advanced HVAC control systems and BMS integration.

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Availability:
In Stock
Shipping time: 31 dni
with VAT without VAT
Price $147.60
incl. 23% VAT

Shipping costs are not included in the price.

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Produkty powiązane

Smart FCU Fan Coil Thermostat

WT303 — LoRaWAN Control of 2- and 4-Pipe Fan Coil Units

Milesight WT303 is a smart thermostat designed for local and remote control of FCU fan coil units in hotels, office buildings, apartments, and other facilities using HVAC installations.

The device works with 2- and 4-pipe systems equipped with 3-speed fans and ON/OFF motorised valves. The built-in E-Ink display, temperature and humidity sensors, and LoRaWAN communication combine local comfort control with centralised building management.

Key Benefits

Local FCU Control Combined with Central BMS

2- and 4-Pipe FCU

The WT303 supports popular fan coil configurations equipped with conventional 3-speed fans.

ON/OFF Valves

The thermostat directly controls compatible 2- or 3-wire motorised valves, depending on the installation configuration.

LoRaWAN + D2D

Bidirectional communication enables centralised management, while Milesight D2D allows local automation without a gateway.

Typical Applications

Where Can the WT303 Be Used?

Hotels
Office Buildings
Apartment Buildings
Shopping Centres
Commercial Buildings
HVAC Retrofit
BMS Systems
Smart Building
FCU Compatibility

2- and 4-Pipe Fan Coil Units with 3-Speed Fans

2-Pipe Installation
3-speed fan + 2-wire ON/OFF valve
2-Pipe Installation
3-speed fan + 3-wire ON/OFF valve
4-Pipe Installation
3-speed fan + 2-wire ON/OFF valves
Output Load Capacity
4 A resistive / 3 A inductive

The WT303 does not have 0–10 V outputs and is not intended for EC fan control. The WT304 model is designed for such installations.

Temperature Control

Heating, Cooling and Ventilation

Setpoint Range
5…35°C
Temperature Modes
Heat, Cool, Ventilation
Fan Modes
Low, Medium, High, Auto
Local Schedules

8 Plans and up to 16 Schedules per Plan

The WT303 can store up to 8 operating plans, each containing a maximum of 16 schedules.

This makes it possible to automatically adapt HVAC setpoints to facility operating hours, time of day, weekends, or different room usage scenarios.

Built-in Sensor

Room Temperature Measurement

Technology
digital CMOSens® MEMS
Range
−20…+60°C
Accuracy 0…+60°C
±0,5°C
Accuracy −20…0°C
±1°C
Resolution
0,1°C
Humidity Monitoring

Additional Information on User Comfort

Technology
digital CMOSens® MEMS
Range
0–100% RH
Typical Accuracy
±2% RH
Maximum Accuracy
±5% RH
Resolution
0,1% RH
External Temperature Measurement

NTC Input and External Sensor Mode

NTC 10 kΩ

The thermostat has an input for an external NTC 10 kΩ ±1%, B3950 sensor.

External Sensor Mode

Control can use temperature data from an external source if the thermostat installation point is not the optimal measurement location.

Milesight D2D

The WT303 can also receive data from compatible Milesight wireless sensors.

Digital Input

Hotel Key Card, Reed Switch or Other Dry Contact

One DI input can work with physical switches and contacts, such as a hotel key-card reader or a door/window reed switch.

This allows the fan coil operating strategy to be switched automatically depending on user occupancy or the status of the monitored element.

Energy Savings

Functions That Automatically Reduce HVAC Energy Use

Open Window Detection

A rapid temperature change can be recognised as an open window, helping to reduce inefficient HVAC operation.

Freeze Protection

Freeze protection helps protect the room and installation against excessive temperature drops.

Fan Delay

The fan delay function helps optimise fan coil operation during mode changes.

Local Operation

2,7" E-Ink Display and Five Buttons

The black-and-white E-Ink display shows temperature, humidity, and the current FCU system status.

Five buttons allow the fan coil to be switched on and off, the temperature setpoint to be changed, and the control mode and fan speed to be selected. Child Lock helps prevent unauthorised setting changes.

Smart Building

LoRaWAN Class C and BMS Integration

LoRaWAN Class C enables fast, bidirectional communication between the thermostat and the supervisory system.

Milesight also supports integration with BACnet systems through compatible LoRaWAN gateways, allowing the WT303 to be incorporated into an existing BMS.

Device

Communication, Power Supply and Design

Model
WT303-868M
Type
smart FCU thermostat
Supported FCU
2- and 4-pipe with 3-speed fan
Supported Valves
2- and 3-wire ON/OFF motorised valves
0–10 V Control
no
0–10 V EC Fan
no
Communication
LoRaWAN® + Milesight D2D
Frequency Band
EU868 / 868 MHz
LoRaWAN Mode
OTAA / ABP, Class C
Transmit Power
16 dBm for 868 MHz
Sensitivity
−137 dBm
Antenna
internal
Display
2,7" black-and-white E-Ink
Buttons
5 external buttons
Temperature Input
1 × NTC 10 kΩ ±1%, B3950
Digital Input
1 × DI, dry contact
USB
1 × USB Type-C for console
Configuration
NFC / Milesight ToolBox, LoRaWAN downlink
Advanced Functions
Threshold Alarm, Child Lock, Multicast, Milesight D2D Controller / Agent, External Sensor Mode, FUOTA
Power Supply
100–240 V AC, 50–60 Hz
Power Consumption
<2 W without load
Operating Temperature
−20…+60°C
Display Operating Range
0…+40°C
Operating Humidity
0–95% RH, non-condensing
Protection Rating
IP20
Material
PC + ABS, UL94 V0
Dimensions
86 × 86 × 42 mm
Wiring
AWG 14–26
Mounting
86 mm box or European 60 mm round box; 118 / 120 mm box with optional plate
Certification
CE, FCC
Integration

WT303 in an HVAC Automation System

The WT303 controls the local fan coil unit, while data and setpoints can simultaneously be transmitted via LoRaWAN to a central management system.

WT303
FCU measurement and control
→
LoRaWAN
bidirectional data transmission
→
LoRaWAN Gateway
network and BMS integration
→
ITS Platform
monitoring and central control
Related Solution

Smart HVAC and BMS Management

The WT303 can be part of a climate management system in hotels, offices, and other facilities equipped with fan coil units. Remote setpoints, schedules, condition monitoring, and integration with building automation help improve user comfort and reduce energy consumption.

View IoT Solutions
MODEL 3D

Smart fan coil thermostat

Ładowanie modelu 3D
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