Milesight WT301 Smart Fan Coil Thermostat User Guide

User Guide Smart Fan Coil Thermostat
Featuring LoRaWAN®
WT30x

WT301 Smart Fan Coil Thermostat

Safety Precautions
Milesight will not shoulder responsibility for any loss or damage resulting from not following the instructions of this operating guide.

• The device must not be disassembled or remodeled in any way.
• The device is not intended to be used as a reference sensor, and Milesight will not should responsibility for any damage which may result from inaccurate readings.
• Do not place the device where the temperature is below/above the operating range.
• Do not place the device close to objects with naked flames, heat source (such as oven), or exposure to sunlight, cold source, liquid, and extreme temperature changes.
• The device must never be subjected to shocks or impacts.
• Do not clean the device with detergents or solvents such as benzene or alcohol. To clean the device, wipe with a soft moistened cloth. Use another soft, dry cloth to wipe dry.

Declaration of Conformity
WT30x is in conformity with the essential requirements and other relevant provisions of the CE and RoHS. Copyright © 2011-2023 Milesight. All rights reserved.
All information in this guide is protected by copyright law. Whereby, no organization or individual shall copy or reproduce the whole or part of this user guide by any means without written authorization from Xiamen Milesight IoT Co., Ltd. For assistance, please contact Milesight technical support:
Email: iot.support@milesight.com
Support Portal: support.milesight-iot.com
Tel: 86-592-5085280
Fax: 86-592-5023065
Address: Building C09, Software Park Phase III, Xiamen 361024, China

Revision History

Product Introduction

1.1 Overview
WT301&WT302 is an advanced touch screen room thermostat specifically developed to oversee fan and valve operations in air conditioner applications where fan coil unit (FCU) is adopted. It achieves this by continuously comparing the environmental temperature with the pre-set desired temperature, enabling both proactive management and automatic control based on predefined logic. This ensures optimal comfort and energy efficiency in the controlled environment.
With wireless detection and easy configuration, the WT301&WT302 offers reliable and convenient room temperature arrangement optimization. It is compatible with standard LoRaWAN® gateway, enabling real-time monitoring of environmental status for effective remote management.
1.2 Key Features

• Adjust the room temperature automatically and manually with a time-controlled regulation
• Applicable for two pipes and 3-Speed fan coil system, compatible with On/Off relay (WT301) or 0-10V (WT302) valve control
• 5+1+1 six periods programmable maximize comfort and economy
• High accuracy of 0.5°C for temperature regulation, enabling precise control of indoor temperature levels
• Adopts an LCD screen with Four-color LED and capacitive touch buttons, providing a better interactive experience
• With clock display function
• With a 12cm ultra-thin embedded panel and a sleek, frameless design, it effortlessly blends into different interior styles, offering a minimalist and elegant appearance
• Equips with external NTC sensor signal input and keycard switch input
• Function well with standard LoRaWAN® gateways and network servers
• Easy to install with the compact size
• Highly adapt to different scenarios with 86mm hidden box and European 60mm round box

Hardware Introduction

2.1 Packing List If any of the above items are missing or damaged, please contact your sales representative.
2.2 Hardware Overview Screen Descriptions:

Static On: the network is activated

2.3 Dimensions (mm)

Wiring Diagrams

1. WT301
   AC95 – 240V – 50/60Hz

2. WT302
   AC95 – 240V – 50/60Hz

Installation

Installation Locations
It is suggested to install the WT30x thermostat about 5 ft. (1.5m) above the floor in an area with good air circulation at average temperature.Do not install the device where:

• Close to hot or cold sources like hot or cold air ducts;
• The place in direct sunlight;
• Dead spots or drafts (behind the doors and in corners);
• In areas that do not require conditioning;
• lose to concealed chimneys or pipes;
• Close to metal objects and obstacles which affect the LoRaWAN® transmission;
• The place with lots of electromagnetic interfaces;
• The place where strong vibration may happen or easy to be subjected to physical shock.

Installation Steps
WT30x is suitable for installation within a standard 86mm pattress box or European 60mm pattress box.

1. Ensure the circuit of all related systems are shut off before installation.
2. Connect corresponding wires to appropriate terminals of WT30x device.
3. Remove LED screen from the mounting plate by pushing the LED screen assembly.
4. Fix the mounting plate into the wall with mounting screws.
5. Fix the LED screen back to the mounting plate.

Operation Guide

WT30x supports to configure device via 5 buttons. In the guide will use below names to indicate every button:

5.1 Basic Settings

1. Power On/off
   Press “POWER” button to turn the thermostat on/off. When button lights green, the thermostat is off; when the power button is off, the thermostat is on.
   Note:

1. When the buttons are not pressed for more than 3 seconds, the LED screen will go off; please press the corresponding button configure the device as usual.
2. Below operations only work when the thermostat is on.

2. Switch SystemMode
   Press “MODE” button to switch the systemmode among HEATING, COOLING and VENTILATION.
   In the mode of VENTILATION, the valve is off but the fan runs.

3. Switch the Fan Speed
   Press “FAN” button to switch the fan speed among AUTO, HIGH, MED, LOW.

4. Adjust Manual & Programmable Mode
   Operation: press and hold on “MODE” button →manual and programmable mode icons flashes by turns → loose “MODE” button → press “UP” button to select manual mode/ press “DOWN” button to select programmable mode. Icon| Mode| Description
   ---|---|---
   | Manual| This mode supports to use “UP” and “DOWN” buttons to adjust target temperature manually.
   | Programmable| This mode supports to control the temperature according to weekly programmable schedule. The “UP” and “DOWN” buttons will not work.

5. Adjusting/Setting the Clock
   Operation: press and hold on “MODE” button →manual and programmable mode icons flashes by turns → loose “MODE” button → press “MODE” button once to adjust minute of time → press “MODE” button once to adjust hour of time → press “MODE” button once to adjust weekday.
   When you stop pressing the buttons for seconds, the device will save your settings automatically.

6. Locking the Thermostat Buttons
   Press and hold the “UP” and “DOWN” buttons together for 3 seconds to enable/disable button lock of your thermostat. When button lock is enabled, the lock icon will display. WT30x supports two lock modes: full lock and half lock. The lock mode can be set on advanced settings.

7. Adjust the Weekly Programmable Schedule
   WT30x supports to add up to 6 time periods and 6 temperature values during weekdays, Saturday or Sunday.
   Operation: press and hold on “MODE” button →manual and programmable mode icons flashes by turns → loose “MODE” button → press “MODE” button 4 times → press “UP” and “DOWN” button to adjust weekday-period 1 time → press “UP” and “DOWN” button to adjust weekday-period 1 temperature → press “UP” and “DOWN” button to adjust weekday-period 2 time → ……..

After completing all settings, click “MODE” button to confirm and exit the schedule settings.
Besides, when you stop pressing any button for a few seconds, the device will save your settings and exit the schedule setting mode.
Default settings of programmable schedules are as follows:

Temperature
Period 1| 06:00| 20°C| 06:00| 20°C| 06:00| 20°C
Period 2| 08:00| 15°C| 08:00| 20°C| 08:00| 20°C
Period 3| 11:30| 15°C| 11:30| 20°C| 11:30| 20°C
Period 4| 13:30| 15°C| 13:30| 20°C| 13:30| 20°C
Period 5| 17:00| 22°C| 17:00| 20°C| 17:00| 20°C
Period 6| 22:00| 15°C| 22:00| 15°C| 22:00| 15°C

5.2 Advanced Settings
Press the “POWER” button to turn off the thermostat, then press and hold on “MODE” and “FAN” buttons together for 5 seconds to reach advanced settings. After completing all settings, press “MODE” button to confirm and exit. Besides, when you stop pressing the button, the device will save your settings after a few seconds automatically and exit the advanced settings. These advanced settings will take effect after turning on the thermostat.

off 01: When room temp. reaches the set temp., the fan will keep low speed running| 00
3| Button Lock| 00: half lock, all buttons are locked except “POWER” button
01: full lock, all buttons are locked| 01
4| System Mode
Selection| 00: Cooling/Ventilation
01: Cooling/Heating/Ventilation| 01
5| Min. Set Temp.| 5°C~15°C (for “DOWN” button)| 5°C
6| Max. Set Temp.| 15°C~35°C (for “UP” button)| 35°C
7| Time Mode| 00: 12-Hour-Clock
01: 24-Hour-Clock| 01
8| Display Mode| 00: Display both set temp. and room temp.
01: Display set temp. only| 00
9| Keycard Function (when keycard is no connected)| 00: Energy saving(ECO) mode: goes to energy saving temp. 01: Standby: the fan and valve relay all off| 00
10| Keycard heating energy-saving temperature| 10°C~30°C| 20°C
11| Keycard cooling energy-saving temperature| 10°C~30°C| 26°C
12| Daytime display brightness| 0-8
Note: The daytime is the time between period 1 and period 6 of weekly schedule, the default is 6:00~22:00.| 3
13| Night display brightness| 0-8| 1
| (Set Temp. Tolerance)| The valve will start cooling when room temp. > (set temp. + dead zone temp.); start heating when room temp. < (set temp. – dead zone temp.).|
---|---|---|---
15| Report Interval| 1~60 minutes| 1 minute
16| LoRaWAN® Mode| 00: SerialNet
01: AT MODE| 00
17| Keycard Function| 00: On
01: Off| 01
18| Time Zone| 0~24: the corresponding time zone -12~12
12 means time zone is UTC+0| 12
19| Room Temp.
Sensor| 00: Use internal NTC or external NTC input sensor
01: Use external temperature data via downlink command| 00
20| Version Number| | U9

WT302 Only

Definition of P Value
The proportional band is the amount of change required by the ambient temperature for the output to go from 0 to 100%. It can be adjusted from 1~10. Factory default is 2.
The larger the P value, the greater the change in valve output; the smaller the P value, the smaller the change in valve output.
For example, when P=2, the temperature difference between ambient temperature and setpoint is 5°C, the valve will open about 10%; when P=4, the temperature difference between ambient temperature and setpoint is 5°C, the valve will open 20%.

Heat mode (P-band: 2)
When the ambient temperature is below the set point the output is somewhere between 0~100%. Cool mode (P-band: 2)
When the ambient temperature is above the set point the output is somewhere between 0~100%. Definition of I Value
This feature allows you to set the integral action time for the integral to run from 0 to 100%. The value required depends on the reaction time of the control loop. If the time is chosen too short, the control loop will become instable and oscillate. If the time is chosen too long, the control loop will become sluggish. It can be adjusted from 1s-60s. The default value is 40s.
5.3 LoRaWAN® Settings
WT30x does not support to configure LoRaWAN® information. Please contact Milesight to customize the LoRaWAN® settings before purchase.

Communication Protocol

6.1 Device Data
All data are based on following format (HEX):

The Data part is consist of Type ID (1 Byte) and Data Content (1 Byte or 9 Bytes) :

Examples:

1. Periodic packet: report as reporting interval (1 minute by default) or when pressing the button to change the settings.

55 01 000a 0f 01000001332a000034 02

Start| ID| Data Length| Data Type| Data Content| Checksum
55| 01| 00 0a=10 Bytes| 0f| 01=Turn On 00=Button Lock Disable
00=Cooling 01=High
33=>51/2=25.5°C (Room Temp.)
2a=>42/2=21°C (Set Temp.) 00=Keycard is disconnected 00=Programme Mode 34=>52/2=26°C (External Temp.)| 02

6.2 Downlink Control Commands
WT30x supports downlink commands to configure the device. The application port is 85 by default. The command is based on following format (HEX):

The Command part is consist of Type ID (1 Byte) and Command Content (1 Byte or 7 Bytes) :

Note: this only takes effect when advanced setting-Room Temp. Sensor is set as

1. ---|---|---
   All Commands| 0f| Send all above commands in order

Checksum Calculation: sum of bytes % 256
Examples:

1. Turn on the device.

55 01 0002 0101 5a

Start| ID| Command Length| Data Type| Command| Checksum
55| 01| 00 02=2 Bytes| 01| 01=Turn On| 5a
2. Set all configurations:

55 01 0008 0f 010000012a0034 cd

Start| ID| Data Length| Data Type| Command| Checksum
55| 01| 00 08=8 Bytes| 0f| 01=Turn On 00=Button Lock Disable
00=Cooling 01=High
2a=>42/2=21°C (Set Temp.) 00=Programme Mode
34=>52/2=26°C (External Temp.)| cd

6.3 Downlink Enquiry Commands
WT30x supports downlink commands to enquiry the device information. The application port is 85 by default. The command is based on following format (HEX):

Examples:

1. Enquiry the room temperature.

55 02 0001 05 5d

Start| ID| Data Length| Data Type| Checksum
55| 02| 00 01=1 Byte| 05=Room Temperature| 5d

Reply:

55 01 0002 05 33 90

Start| ID| Data Length| Data Type| Data Content| Checksum
55| 01| 00 02=2 Bytes| 05| 33=>51/2=25.5°C| 90
2. Enquiry all data.

55 02 0001 0f 67

Start| ID| Data Length| Enquiry Type| Checksum
55| 02| 00 01=1 Byte| 0f=All data| 67

Reply: the same as periodic packet.

Appendix

Default Frequency

Default RX2 Frequency and Datarate

References

• Support : IoT Support

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