Hexa CONTROL RT226-MB29 Modbus Fan Coil Thermostat Product Data Sheet

Hexa CONTROL RT226-MB29 Modbus Fan Coil Thermostat

Specification

• Specification:2 and 4 pipe FCU systems
  • Heat / Cool mode
  • 3-speed thermostatic fan control
  • Motorized valve Modulating control
  • Key card function
  • RS482 Modbus communication
• Power Source:AC220V±10%, 50/60 Hz
• Temperature Operation:5-35 °C
• Accuracy:±0.5 °C
• Load Current:1A
• Installation: Flush mounting
• Dimensions:86X86X13 mm
• Warranty:2 years
• Brand: Hexa Controls
• Origin: People’s Republic of China (PRC)

Wiring

When the thermostat is off, press the fan speed button ( ) and M button at the same time for 5secs to enter the parameter setup menu. You can shortly press the M button each time to see the menu list.
1	Sensor Calibration	You can calibrate the room temperature by pressing the up and down buttons.
2	Thermostatic Control	With this function, you may choose to off fan with valves when the thermostat reaches the setup temperature or to keep the working fan when the valves are off. Valves and fan stop at the same time (default mode) The valves stop but the fan keeps running
3	Key Lock	To lock the thermostat for user intervention, you can activate the key lock by pressing and holding the Up and Down buttons at the same time for 3 seconds. A key icon appears on the screen. All the buttons are locked except the Power All the buttons are locked including the Power
4	Mode Selection	You can sellect the mode function in this parameter. Cool-only Heat and Cool                                                Heat only
5	Min. Set Temperature	You can select the minimum set temperature between 5-15°C
6	Max. Set Temperature	You can sellect the maximum set temperature between 15-35°C
7	Time Display Setting	You can sellect the time display. 12 hours                                                            24 hours
8	Display Settings	You can sellect the temperature display. Both set and room temperature.                       Set temperature only
9	Deadzone Temperature	If the room temperature falls below the selected temperature between 1-5°C, heating will be on.
A	Modbus IP Address	You can select IP address 0X00-0XFF
B	Baudrate	1: 9600	–	2: 19200	–	3: 38400	–	4: 56000	–	5: 115200
Setting the clock
Press and hold M to set the Clock; Press M to set the minutes of the time, and press to adjust the relative values.Same setting for an hour and a week of the time. After that, all will be confirmed automatically.
Setting the modes
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  to select the fan speed AUTO, HIGH, MED, LOW

Definition of P-Value

The proportional band is the amount of charge required by the room 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 setpoint is 5°C the valve will open about 10%; when P=4, the temperature difference between room temperature and setpoint is 5 ℃, 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 unstable and oscillate. If the time is chosen too long, the control loop will become sluggish. It can be adjusted from 1S-60S. The factory default is 40S.

Setting the modes

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 to select the fan speed AUTO, HIGH, MED, LOW.

REFERENCE:

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Hexa CONTROL RT226-MB29 Modbus Fan Coil Thermostat Product Data Sheet

Hexa CONTROL RT226-MB29 Modbus Fan Coil Thermostat Product Data Sheet