Modbus control panel RDF280

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Modbus RDF280 air conditioning multi-line touch button control panel
HMI for variable refrigerant flow (VRF) applications
● Slim touch key design (8mm thick)
● Working voltage AC 230V, large backlight display
● Operating modes: ON (open), OFF (closed) and ECO (energy saving)
● Display room temperature or temperature setpoint
● Display indoor temperature via built-in sensor or VRF indoor unit
● Adjust the temperature setpoint
● Minimum and maximum temperature setting limits
● VRF master/slave mode selection: auto, cooling, heating, air supply and dehumidification
● Fan mode: automatic and manual
● Up to 7 adjustable fan speeds
● Simple delay timer up to 23 hours
● Internal sensor calibration
● Key lock function
● Power off memory function (return to previous operation mode after power off and on), ON (normal mode) or OFF
● Debug parameters and control parameters can be adjusted
● RS485 Modbus RTU slave mode Modbus interface for VRF gateway and system integration
● Installed in an 86mm square recessed junction box with a fixed hole distance of 60.3mm and a minimum depth of 50mm
To use
Control room temperature with connected VRF system
Typical application:
● Houses and apartments
● Offices and hotels
For VRF HMI, the unit integrates with the VRF system via a third-party gateway to:
● Setpoint adjustment: max/min limits
● Fan speed adjustment: auto/manual speed (up to 7 speeds)
● Select operation mode: automatic, heating, cooling, ventilation and dehumidification
● ECO mode: save energy
● Delay Timer (optional): Allows up to 23 hours of operation before shutting down
Function
● Select VRF mode (P01)
-Auto, heating, cooling, ventilation and dehumidification
● Select the operating mode by keys or parameters (P02)
-ON, ECO and OFF
● Select °C or °F as temperature unit (P04)
● Calibrate the built-in temperature sensor (P05)
● Select display content (P06)
A) Built-in sensor
B) VRF indoor unit
C) set the value
● Defined minimum and maximum ambient temperature limits (P09, P10)
● Key lock function: lock and unlock (P14)
advanced features
Optional: enable/disable via parameter:
● Operation mode after energy recovery: previous mode, ON or OFF (P27)
● Delay timer activated: up to 23 hours (P28)
● VRF indoor unit maximum fan speed set (P53)
● Factory reset function can restore control parameters changed due to commissioning (P71)
● Modbus Settings (P81, P82, P83)
● Enable Chinese character display (P98)
Mechanical Design
The VRF HMI unit consists of three parts:
● LCD display
● Decorative frame
● Mounting plate, which can be mounted in a square junction box with a fixed hole distance of 60.3mm.