Parameter Settings: Switch off the thermostat and press “M” and “■*■”5 seconds to enter parameter setting menu, press the “M” or “'S’” to change the item, and press'^ -Mo change the value, press power button “O” or wait 30S to exit and save all settings 1- Selectable System Type: control 2/4-pipe fan coil units BC105WS-4 Series User Manual This Fan coil thermostats are widely used in all commercial and residential buildings room temperature control, accuracy control provides you comfortable environment, and have the effect of saving energy and reducing up to 30% power consumption. This universal thermostats work with: ^ 2-pipe/4-pipe fan coil units + Floor Heating/DX Unit Compressor Electric heat ^ 3-speed fan ^ ON/OFF valves ^ Timer or Programmable(model No. with T Only) ^ Modbus communication(model No. with M Only) ^ Dry contact for window or door, Hotel card holder ^ External sensor for air or pipe temperature 2. Temperature setting range: 5-35°C 4. Temperature control Accuracy: ± 1°C 7. Valve Control: up to 2pcs ON/OFF valves 8. Remote Sensor Type: NTC10K, B=3950 9. Communication: Modbus 4800,9600,19200bps baud rate 10. Dry contact: for window, door or hotel card holder 11. Storage temperature: -20C~60C, Operating temperature: 0~50°C 16. Installation type: Surface mounting, Hole pitch: 60mm User Guide: ON/OFF: Press power button to switch ON and OFF thermostat. Temperature Setting: Press “^” to reduce temperature, press “A” to raise temperature Mode: Press “M” to change mode between Cool Heat * and Ventilation ❖ , mode will be confirmed by pressing other button or automatically after 6 seconds Fan: Press to change S-speed*^ ~ or Auto fan Auto Low-speed if difference between room-temperature and set-point exceed 1°C, Auto Med-speed When exceed 2°C, Auto Hi-speed When exceed 3°C. Backlight: Any key press will activate the backlight. Backlights will timeout 6 seconds after last key press. Keypad Lockout: (ONLY available when Item 11 set to 1/2/3): Press “^”and “A” for 3 seconds to lock the buttons and press “^”and “A” for 3 seconds to unlock. Clock (Only for the model number with T): Power on thermostat, press “M” for 3 seconds 1, the symbol hour flash, press ^or ^ to adjust hour 2, press “M” key, minute flash, press “^” or “A” to adjust minute 3, press “M” key, week flash, press “^” or “A” to adjust week Press power button “O” or wait 30S to exit and save all settings Timer on/off (Only for the model number with T): Repeat the Clock steps 1~4 above 1, Timer on and hour flash, press “ ^ ” or “ ^ ” to adjust hour 2, press “M” key, minute flash, press “^” or “A” to adjust minute 3, press “M” key, Timer off and hour flash, press “ ^ ” or “ ^ ” to adjust hour 4, press “M” key, minute flash, press “^” or “A” to adjust minute 5, press “M” or wait 6 seconds to confirm Note: This function only acts once and valid on current day. Press power button “O” or wait 30S to exit and save all settings Programmable (Only for the model number with T): Power on thermostat, press “M” and “•S’” for 3 seconds 2, Press “^”and “A” to set start hour 3, Press “M” and use “^” “A” to set start minute 4, Press “M” and use “^” “A” to set desired temperature 5, Press “M” to enter event 2/3/4 and repeat step 2~4 6, Press “M” to edit “Sat & Sun” and repeat step 1~5 7, Press “M” or wait 6 seconds to confirm all the settings above Press power button “O” or wait 30S to exit and save all settings Table Explanation: 2- Auto Mode: you can set your 2-pipe/4-pipe system running as manual or auto season changeover 3- Sensor Type: 1: Internal sensor only. 2: external sensor only 3: the external sensor attaches to water pipe for measuring the water pipe temperature to change mode between Heat and Cool automatically, this function is only available under 2-pipe Fan coil (Option 1=0) and auto system (Option 2=1) at the same time System works in cooling mode if the water temperature is less than or equal to certain temperature (Default as18°C see option 10), and work in heating mode if the water temperature is higher than or equal to certain temperature (Default as 22°C,see option 9). 4- Fan Control: when the room temperature reaches setpoint, you can set the fan stop running or continuous blowing 5- Unoccupied Status: when the hotel card is pulled out, the unoccupancy status will be: 0: no output; 1: thermostat will work in energy saving mode with setback setpoint, fan will run at low speed 7- Display Temperature adjustment: calibrate the room temperature by the range from -4C to 4C 8- Dead Band: the cool/heat will be only activated if differential temperature between setpoint and room temperature > the dead band. For example, under cooling mode, the setpoint is 25C with dead band=1C, the cool air will be only available if the room temperature > 26C.

work as auto changeover under 2-pipe system. The fan will be only activated if the external sensor measure water in the fan coil pipe is hot or cold enough, this is for anti-freezing air blow under heating mode if the pipe water is not hot enough(temperature set range 21~40C), also for energy saving under cooling mode if the pipe water is not cold enough (temperature set range10~20C) Mounting and Installation Mount the room thermostat on the conduit box. Do not mount on a wall in niches or bookshelves, behind curtains, above or near heat sources. Mount about 1.5 M above the floor 11- Keypad lock:...