BHT-003 Series Zigbee Thermostat
User Guide
For Water Heating/Boiler/Electric Heating
Welcome
Thank you for your purchase. Your new thermostat will provide uniform and comfortable temperature control throughout your property. Beca combines technology, craftsmanship, and high-quality materials to offer a safe, reliable product with a sleek, contemporary design.
Please read this installation and programming manual for comprehensive instructions. Ensure a suitably qualified person installs the thermostat and complies with all local regulations.
In the Box
- Thermostat (1pc)
- User Guide (1pc)
- QC Passed (1pc)
- Screws (2pc)
- Floor Sensor (2.5m) (1pc, optional)
About Your Thermostats
The BHT-003 series is designed to control electric underfloor, water heating, or water/gas boiler systems. These units are suitable for commercial, industrial, civil, and domestic properties.
Model Definition
GA: Water heating, 3A
GC: Water/Gas Boiler, 3A
GB: Electric floor Heating, 16A
L: Backlight
P: Weekly Programmable
W: Wifi
N: Modbus Communication
Z: Zigbee
S2: Both internal sensor and floor external sensor
Example: BHT-003 GC
Features
On Appearance
- Convenient operation for a comfortable life.
- Available in black and white housing options.
- Fashionable design that blends with any decor.
- Touch screen display with backlight for easy reading, even in the dark.
- Bright buttons indicate the device status.
- User-friendly interface suitable for all users.
On Functionality
- Powerful functions including Modbus, WIFI, Zigbee, etc.
- 0.5°C Accuracy maintains precise temperature control.
- Data memory retains settings during power outages.
- 5+1+1 four-period programmable schedules maximize comfort and economy.
- Create thermostat groups for centralized control.
- All setting languages synchronize with your time zone, address, and language.
Dimension
Dimensions: 86.0mm x 86.0mm x 12.0mm (front face), 29.9mm (depth)
Shell Material: PC+ABS (flame retardant)
Installation Box: 86 * 86mm Square or European 60mm Round Box
Wire Terminals: Accommodates 2 x 1.5 mm² or 1 x 2.5 mm² wires.
Protection Class: IP20
Buttons: Capacitive Touch Buttons
Technical Data
- Power Supply: 95~240 VAC, 50~60Hz
- Current Load: 3A (water heating/water boiler/gas boiler), 16A (electric heating)
- Sensor: NTC
- Accuracy: ±0.5°C
- Set Temp. Range: 5-35°C
- Display Temp. Range: 5~99°C
- Ambient Temp.: 0~45°C
- Ambient Humidity: 5~95% RH (Non-Condensing)
- Storage Temp.: -5~45°C
- Power Consumption: <1.5W
- Timing Error: <1%
Before Wiring and Installing
Important:
- Read these instructions carefully. Failure to follow them could damage the product or cause a hazardous condition.
- Check the ratings given in the instructions and on the product to ensure suitability for your application.
- Installation must be performed by a trained, experienced service technician.
- After installation, verify product operation as described in these instructions.
CAUTION
Electrical Shock or Equipment Damage Hazard. Can shock individuals or short circuit equipment. Disconnect power supply before installation.
Wiring
The thermostat supports different wiring configurations:
- GA: For water heating (3A)
- GB: For electric heating (16A)
- GC: For water/gas boiler (3A)
Note: NTC and Modbus are optional features.
Diagram Description: The wiring diagrams show connections for AC power (95~240V), NTC sensor, LOAD, and Modbus terminals. Specific terminal assignments (e.g., L, N, GA, GB, GC, A, B) are indicated for each model type.
Installation
Your thermostat is designed for installation within a standard 86mm pattress box or a European 60mm pattress box.
- Step 1: Ensure power is off. [See Fig 1]
- Step 2: Remove the mounting plate by rotating the LCD part. [See Fig 2]
- Step 3: Connect power supply and load to the appropriate terminals (refer to "Wiring your thermostat" and Fig 3).
- Step 4: Fix the mounting plate to the wall using the screws provided. [See Fig 4]
- Step 5: Fasten the thermostat body to the mounting plate by rotating. [See Fig 5]
- Step 6: Installation is complete. [See Fig 6]
Home Screen Quick Reference
The home screen displays key information:
- Time: Current time (e.g., 88:88)
- Day: Current day of the week (MON TUE WED THU FRI SAT SUN)
- Status Icons: Heating On, WIFI, Lock, Period, Manual, Energysaving, Programmable, Underfloor Heating On.
- Temperatures: Room Temp., Set Temp.
- Mode: Clock, Manual, Programmable.
Operation
During Power On
- Power On/off: Press the power button [▶️/⏹️] to turn the thermostat on or off.
- Manual & Programmable Mode: Touch the mode button [⚙️] to switch between manual and program modes. Manual mode displays a manual icon [✍️] at the bottom. Programmable mode displays a period icon [?] on the left.
- Setting Temperature: In manual mode, press the temperature adjustment buttons [⬆️]/[⬇️] to set the desired temperature. In programmable mode, temperature and time settings are adjusted via the schedule.
- Adjusting/Setting the Clock: Touch the clock icon [⏰] and use the arrow buttons [⬆️]/[⬇️] to set the minute, hour, and weekday (1=Monday, 2=Tuesday, etc.). Press again to confirm and exit.
- Locking Your Thermostat: Press and hold the power button [▶️/⏹️] for 5 seconds to lock/unlock the thermostat. Full or half lock can be selected in system option 3.
- Adjusting/Setting Program Schedules:
- In program mode, touch and hold the schedule icon [?] until the weekday schedule appears (1-5 will show on the left).
- Use the [⬆️]/[⬇️] arrows to adjust the on time.
- Press the icon [▶️] and use [⬆️]/[⬇️] arrows to set the temperature for the 1st period.
- Press again and use [⬆️]/[⬇️] arrows to set the temperature for the 2nd period.
- Repeat this process for periods 3, 4, 5, and 6.
- Press the icon [▶️] again to enter the Saturday schedule settings (6 will show on the left).
- Repeat the above process to set the period and temperature for Sunday schedules.
- Press once more to confirm and exit.
Program Schedule Defaults
A separate schedule can be set for weekdays (Mon-Fri) and weekends (Sat/Sun).
| Period | Mon-Fri Time | Mon-Fri Temp (°C) | Sat Time | Sat Temp (°C) | Sun Time | Sun Temp (°C) |
|---|---|---|---|---|---|---|
| 1 | 6:00~8:00 | 20 | 6:00~8:00 | 20 | 6:00~8:00 | 20 |
| 2 | 8:00~11:30 | 15 | 8:00~11:30 | 20 | 8:00~11:30 | 20 |
| 3 | 11:30~13:00 | 15 | 11:30~13:00 | 20 | 11:30~13:00 | 20 |
| 4 | 13:30~17:00 | 15 | 13:30~17:00 | 20 | 13:30~17:00 | 20 |
| 5 | 17:00~22:00 | 22 | 17:00~22:00 | 20 | 17:00~22:00 | 20 |
| 6 | 22:00~6:00 | 15 | 22:00~6:00 | 15 | 22:00~6:00 | 15 |
7. Checking the Temperature of Floor Sensor: Press and hold the [⬆️] arrow for 5 seconds to display the floor sensor temperature.
Operation During Power Off
Setting Functions and Options:
When the power is off, press and hold the [88] and [⬆️] buttons simultaneously for 5 seconds to access system functions. Press [▶️] to cycle through different items. All settings will confirm automatically when power is turned on.
| Code | Function | Setting and Options | Default |
|---|---|---|---|
| 1 | Temperature compensation | -9 to 9 °C (for internal sensor) | -3 |
| 2 | Deadzone Temp. | 1-5°C | 1 |
| 3 | Button Locking | 00: All buttons are locked except power button. 01: All buttons are locked. | 1 |
| 4 | Sensor type | In: Internal Sensor (controls temp.) Ou: External Sensor (controls temp.) AL: Internal & External Sensor (Internal sensor controls temp., external sensor limits temp.) | AL |
| 5 | Min. Set Temp. | 5-15°C | 5 |
| 6 | Max. Set Temp. | 15-45°C | 30 |
| 7 | Temp. display | 00: Display set Temp. and Room Temp. 01: Only display set Temp. | 00 |
| 8 | Low temp. protection setting. | 0-10°C | 0 |
| 9 | High temp. protection setting. | 25-70°C | 45 |
| A | Daytime display brightness (6:00-22:00) | 0-8 | 1 |
| B | Brightness display brightness (22:00-06:00) | 0-8 | 1 |
| C | Reset | 00: No factory reset; 01: Factory reset | 00 |
| D | Version number | U1 | U1 |
About ZigBee
ZigBee CONNECTION
Step 1: Download Your APP
Search for "Smartlife" in the Apple Store or Google Play, or scan the QR code [?] to access the app. Complete account registration and installation following the app's guidance.
Step 2: Gateway Connection
Ensure you have connected to a Tuya Zigbee wired or wireless gateway. Refer to the gateway's manual for connection details. The following steps assume a "wireless smart Zigbee gateway".
Step 3: Connect the Thermostat
Follow the tutorials below to complete the connection and setup.
Method 1: Scan QR Code Network Configuration Guide
Diagram Description: This method involves scanning a QR code within the app to initiate network configuration.
Method 2: Ordinary Network Distribution Guidance
Diagram Description: This method involves manually adding the device or auto-scanning for devices within the app. It guides users through selecting the gateway and confirming device pairing status.
Zigbee Quick Connect:
When the thermostat is off, press and hold the "down button" [⬇️] until the thermostat screen flashes quickly and displays the "Zigbee" icon [?]. Then, operate according to the app prompts.
Zigbee Gateway Connection:
With the thermostat turned off, press and hold the "down button" [⬇️] until the thermostat screen flashes quickly and displays the "Zigbee" icon [?]. Then, operate according to the app prompts.
Diagram Description: The app interface description shows controls for temperature adjustment [⬆️]/[⬇️], mode switching [⚙️], power [▶️/⏹️], weekly programming [?], and advanced options. It also details the process of adding a sub-device (thermostat) to the gateway.
Simplement Exception Handling
| No. | Phenomenon | Handling |
|---|---|---|
| 1 | Power is on but without display. | Check if the terminals between LCD panel and Power Unit Box are loose. |
| 2 | Without output but display works. | Use a new LCD panel or new Power Unit Box to replace the old one. |
| 3 | Room Temp. Is a little different from the actual. | Do temperature calibration in system option 1. |
Service
A 24-month warranty is provided from the date of purchase. Service beyond the warranty period may incur charges. For more details, please contact customer support.
