Application: RT226-F8 is a versatile room controller for individual room temperature and VAV control applications. The bus is galvanically isolated from the controller’s other electronics. The controller has a display and touch buttons for commissioning the controller and adjusting the user parameters, temperature set point, for example.
Thermostat Buttons and Switches
The Display
Match with the RT226 F8 remote contr ol / Optional
The relationship between the output PI and temperature difference ( room temperature and setting temperature)
If we set the P-band is 2℃, when the room temperature is higher 2℃ than the setting temperature, the terminal 11 will 100% output, the cooling equipment actuator will 100% open; when the room temperature is equal or lower than setting temperature, the terminal 11 will stop output(0% output), the cooling equipment actuator will fully close. The LCD will display the current output PI value. Fan and the first section mark show 10-40%, fan and the second section mark show 41-70%, fan and the third section mark show 71-100%.
The operation mode is total three: cooling, heating, auto。
After connecting the external sensor, in the auto mode, when the difference of the inlet air temperature and room temperature is 5℃, the mode automatically switch。When the inlet air temperature is high 5℃ than the room temperature, it will switch to heating, if lower than 5℃, it will switch to cooling. When in auto mode, if the external sensor is not connected, it will switch to other mode forced(room temperature is high than 25℃, it will be heating mode. Otherwise, it will be cooling mode)。
Room card function
When the terminal 12 and 13 connect with the room card input signal, the room card input signal control the thermostat into the economical mode, show 。When in the economical operate mode, the setting temperature is depended on the 8 item and 9 item in the initialize menu. The room card ON or OFF is still depended on the 10 item of the initialize menu. The input of the room card is node signal, the maximum voltage is 5V DC。
Analog output choose the wire jumper
Open the thermostat,the cover of the wire jumper lie the below of the thermostat As the following figure show,the analog output of the wire jumper’s choose.
The configuration menu allows you to set certain thermostat operating characteristics to your system or personal requirements. Switch off the thermostat, long press button more than 3 seconds to enter the configuration menu, The display will show the first item in the configuration menu 1. Press button to shift to the next menu item, use ▲ or ▼to select. To exit the menu , pressing power button to switch off the thermostat. Thermostat will exit the configuration menu if no buttons are pressed within 20 seconds. The configuration menu chart summarizes the configuration options. An explanation of each option as follows:
Item | Displayed | Description | Setting range | Factory default |
1 | Temperature correction | -4°C — 4°C | 0 | |
2 | Temperature setting maximum | 20°C — 45°C | 35 | |
3 | Temperature setting minimum | 5°C — 20°C | 5 | |
4 | Temperature scale | C:Celsius degree F:Fahrenheit degree | C | |
5 | Backlight choose | 1 . OFF 2 . Automatically ON 10S 3. ON all the time | 2 | |
6 | Memorize option before power loss | rE: With memorize option before power loss rd: without memorize option before power loss | rE | |
7 | 485 communicate address | 1 — 255 | 1 | |
8 | Heating energy-saving temperature | 10°C — 18°C | 18 | |
9 | Cool energy-saving temperature | 25°C — 30°C | 25 | |
10 | Room card input | SC: with room card, activate the energy mode by open circuit OC: with room card, activate the energy mode by close circuit OO: without room card function | SC | |
11 | Temperature display option | 0: Show setting temperature and room temperature 1: only show room temperature 2: only show setting temperature | 0 | |
12 | Proportional band | 1°C — 10°C | 5 | |
13 | Integral time | 0min — 10min | 5 | |
14 | Temperature sensor control option | 0: Return air temperature sensor active 1:Room temperature sensor active 2 :Mix temperature sensor active | 2 |
Please cut off the power source before installing, removing, clean or reconditioning the thermostat.
CUSTOMER ASSISTANCE
After reading this guide, if you have any questions about the operation of your thermostat, please contact your installer or service provider.
DOWNLOAD MANUAL
Hexa CONTROL RT226-F8 Digital Thermostat User Manual
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