BAC-2000-ML Modulating
Touch Button Thermostats
User Guide
For Fan Coil Unit
Welcome
Thank you for your purchase.
Please read this installation/programming manual for comprehensive instructions on installing and operating your thermostat. Please also ensure a suitably qualified person installs your thermostat and complies with all local regulations.
In the box, you will find
| the Thermostat | 1pc | Screws | 1pc |
| User Guide | 1pc | Wall plate | 2pc |
| QC Passed | 1pc |
ABOUT YOUR THERMOSTATS
BAC-2000-ML Modulating Touch Button thermostats are designed to provide Proportional-Integral (PI) modulating control in 2-pipe or 4-pipe fan coil units, zoned commercial heating, Ventilating, and various heating and cooling applications. This thermostat provides modulating analog 0-10y control.
TECHNICAL DATA
Power Supply: 95 – 240 VAC, 50 – 60HZ
Fan Relay Amps Resistance: SA; Inductive: 3A
Valve Relay Amps Resistance: 3A; Inductive: 1A
Sensor: NTC3950, 10K
Accuracy: ±0.5 C
Set Temp. Range: 5 -35 C
Display Temp. Range: 5 – 99C
Ambient Temp.: 0″ 45 C
Ambient Humidity: 5 – 95 % RH (Non-Condensing)
Storage Temp.: -5 – 45 C
Power Consumption: <1.5W
Timing Error: < 1%
Shell Material: PC +ABS ( Fireproof)
Installation Box: 86* 86mm Square or European 60mm Round Box
Wire Terminals: Wire 2 x 1.5 mm2 or 1 x 2.5 mm2
Protection Class: 1P20
Buttons: Capacitive Touch Buttons
FEATURES
On Appearance
- 86mm hidden box and a European 60mm round box is suitable.
- White, black, or gold housing creates your colorful life.
- White backlight protects your eyes
- Touch buttons to make simple operation.
- Amazing Silver Frame opens your modern life.
On Functionality
- Powerful functions are available such as Modbus/WIFI etc,
- 0.5°C Accuracy keeps the temperature within the level you set.
- Data memory when power is off.
- 5+2 six periods programmable maximize comfort and economy.
- Create a thermostat group to centrally control.
- Integrated with Amazon Echo, Google Home, Tmall Genie, and IFTTT.
- Support Device Sharing.
- All setting languages synchronize your time zone, address, and language
- No limit to adding a room.
- Support Smart Scene.
DIMENSION
CAUTION
Electrical Shock or Equipment Damage Hazard. Can shock individuals or short equipment circuitry.
WIRING
INSTALLATION
Your thermostat is suitable for installation within a standard 86mm pattress box or a European 60mm pattress box.
Step 1. Keep the electricity off. See Fig 1.
Step 2. Remove the mounting Plate by rotating the LCD part. See Fig 2.
Step 3. Connect the power supply, and load it into the appropriate terminals. (see “Wiring your thermostat” for details and Fig 3).
Step 4. Fix the mounting plate into the wall with screws in the box. See Fig 4.
Step 5. Fasten the body of the thermostat and the mounting plate See Fig 5
Step 6. Installation complete. See Fig 6
HOME SCREEN QUICK REFERENCE
OPERATION
During Power On
- Power On/off: Press
to turn the thermostat on/off. - Manual & Programmable Press and hold M,
will flash. Press 
to select manual and press 
to select weekly programmable. - Setting Temperature
In the mode of manual, press
to set the temperature will display in the left corner of the screen. - Locking Your Thermostat
Press and hold them for 5 seconds to lock/unlock your thermostat. In item 3 of high senior options, you can select full lock or half lock. - Selecting System Mode
Press M to change the system mode to HEATING, COOLING, and VENTILATION. In the mode of VENTILATION, the valve is off but the fan runs. - Setting the Fan Speed
Press Se to select the fan speed AUTO, HIGH, MED, or LOW. - Restore Manufacturer Defaults
Press the Restore Manufacturer Defaults,you can reset the thermostat. Steps: Open your app – go into your room – click the menu on the top right corner – move to the end – Press Restore Manufacturer Defaults. - Adjusting/Setting the Clock
Press and hold M, will flash. Press M to set the minute, hour and weekday (1 = Monday, 2 = Tuesday, etc.) by using the arrows, after 3 seconds the value will be confirmed automatically. - Adjusting the Weekly Programmable
Press M to do the adjustment of the weekly programmable.
Then press M to change the different items. Pressor to set the relative values.
Your thermostat provides six scheduled heating and cooling periods each day—three Comfort periods – 1, 3 & 5 (the temperature required when the room is occupied) and three Economy periods — 2, 4 & 6 (the temperature required when the room is unoccupied). You can set both the time and temperature for each of these six daily periods. Adjusting/setting the schedules can only be carried out when in program mode; Touch M (mode) to change between manual mode and program mode. In manual mode, will show in the bottom left of the screen. Touch the icon M four times until the weekday schedule settings appear (1 2 3 4 5 will show along the top of the screen). Use the arrows to adjust the time for the 1st (Comfort) period Press the icon M and use the and arrows to set the temp. for the 1st period. Repeat this process for periods 2 — 6. Press the icon M once more to enter the weekend schedule settings (6 & 7 will show along the top of the screen). Repeat the above process to set the weekend schedule.Press M once more to confirm and exit.
Default settings for program schedule
| Time display | WEEKDAY (MONDAY — FRIDAY) (12345 shows on screen) |
WEEKEND (SATURDAY) (6 shows on screen) |
WEEKEND SUNDAY) (7 shows on screen) |
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| TIME | TEMPERATURE | TIME | TEMPERATURE | TIME | TEMPERATURE | |
| Period 1 | 6:00 | 20°C | 6:00 | 20°C | 6:00 | 20°C |
| Period 2 | 8:00 | 15°C | 8:00 | 20°C | 8:00 | 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 |
In the mode of programmable, set temp., time could not be adjusted.
During Power, Off
Setting the Functions and Options
When power is off, press and hold M and 
at the same time for 5 sec. in order to reach system function.
Then press M to change the different items.
All the settings will confirm automatically when the power is on.
| Code | Function | Setting and options | Default |
| 1 | Temperature compensation | -7 to 7°C | -1 |
| 2 | Fan control | 00:When room temp. reaches the set point, the fan will turn off 01:When room temp. reaches the set point, the fan will turn to low speed |
0 |
| 3 | Button Locking | 00:All buttons are locked except the power button O1:All buttons are locked. | 1 |
| 4 | Heat/cool | 00:Cool only 01:Heat/Cool | 1 |
| 5 | Min. Set Temp. | 5 to 15°C | 5 |
| 6 | Max. Set Temp. | 15 to 35° C | 35 |
| 7 | 12/24 hours | 00:12h 01:24h | 1 |
| 8 | Display Mode | 00: Display both set temp. and room temp. 01: Display set temp. only | 0 |
| 9 | invalid | ||
| A | P value | 1 -10 | 2 |
| B | I value | 1S-60S | 40 |
| C | Deadband Temp. | 1 to 5°C | 1 |
| D | Standby Brightness of backlight | 3-99 bigger value, more brightness | 4 |
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. If the P value is bigger, the change in valve output will be bigger; if The P value is smaller, the change in valve output will be smaller. For example, when P=2, the temperature difference between ambient temperature and the setpoint is S C, the valve will open about 10%; when P=4, the temperature difference between ambient temperature and the setpoint is S 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 0100%.
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 unstable and oscillate. If the time is chosen too long, the control loop will become sluggish. It can be adjusted from 1S-60S. Factory Default is 405.
ABOUT WIFI
WI-FI CONNECTION
Before using your Wi-Fi thermostat for the first time, you must configure the Wi-Fi signal and settings through your smartphone or tablet, This will allow communication between your connected devices
Step 1 Download your APP（Fig1-1）
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http://app.yimusmart.com/smartlife |
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http://app.yimusmart.com/smartlife |
Search for “Smartlife” in Apple Store or Google Play or use a browser to scan the QR code above (Figure 1-2), and complete account registration and installation according to the guidance of the APP.
Step 2. Connect the thermostat
Check the tutorial below to complete the connection and setup.
Method 1: Scan the QR code to configure the network guide (Fig 2.1-Fig 2.3)
https://smartapp.tuya.com/s/pp=N8bUqOZ8HBQjU0K0&v=1.0
Method 2: Ordinary distribution network guidance
(Fig. 2. 1&Fig. 2.3.1)
Network distribution mode:
1、EZ Mode
When the thermostat is off, press and hold the ” “until the thermostat screen flashes quickly and displays the “
” icon, and then operate according to the following figure (Fig 2.4-Fig 2.7).
2、AP Mode
When the thermostat is off, press and hold the “ ” until the thermostat screen flashes slowly and the ” 
” icon is displayed (if the ” ” icon appears, continue to press the “ ” until the thermostat screen Flashes slowly and displays the “ ” icon), and then operate according to the following figure (Fig 2.8-Fig 2.14).
After connecting to this hotspot, return to the “smart life” APP
APP operation interface description (FCU thermostat)）
More settings
SIMPLE EXCEPTION HANDLING
No. Phenomenon Handling
- The power is on but without display. * Check if the terminals between the LCD panel and the Power Unit Box is loosened.
- Without output, the display works. * Use a new LCD panel or new Power Unit Box to replace the old one.
- Room Temp. Is a little different from * Do temperature calibration in item 1 of high the actual? senior options
SERVICE
Your thermostat carries a 24 months warranty from the date of purchase. Service outwith the warranty period may incur a charge. For more detail please contact us directly.
Documents / Resources
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beca BAC-2000-ML Modulating Touch Button Thermostats [pdf] User Guide BAC-2000-ML, Modulating Touch Button Thermostats, BAC-2000-ML Modulating Touch Button Thermostats, Touch Button Thermostats, Thermostats, Thermostat, BAC-2000ML Series WiFi Thermostat |
