Fresh air fan controller with touch buttons RDF270 Fresh air unit (FAU) ● ● ● ● ● ● ● ● ● ● ● ● ● A6V12068497_en--_b 2021-12-15 Slim (8 mm thickness) touch button design AC 230 V supply voltage, large LCD backlit display Separate ON and OFF power button Fan type selection: 3-speed or ECM Manual fan speed adjustment at max.
Use Ventilation and indoor air quality control in purifying systems: Typical applications: ● Residential homes and apartments ● Offices & hotels Functions ● Operating mode selection via button or parameter (P02) – ON (Normal mode), FAU ECO and OFF ● ● Key lock function: Lock and unlock (P14) Fan type selection (P53) – 3-speed or ECM fan (DC 0...
Symbol Description Symbol Description FAU ECO mode Manual fan mode Alarm/Service reminder Delay-off timer Keylock Internal circulation External circulation without bypass External circulation with bypass Parameter values, etc. Secondary display Select or move to next item Confirm Cancel or return Home Increase, decrease or select Fan or fan speed mode Setting On/Off Type summary Product no. Stock no.
Notes Security CAUTION National safety regulations Failure to comply with national safety regulations may result in personal injury and property damage. ● Observe national provisions and comply with the appropriate safety regulations. Mounting and installation Mounting ● ● ● The devices are suitable for wall mounting. Recommended height: 1.5 m above the floor. Do not mount the devices in recesses, shelves, behind curtains or doors, or above or near heat sources.
Wiring WARNING Wire, protect and earth in compliance with local regulations. Risk of fire and injury due to short circuits! ● ● Adapt the line diameters as per local regulations to the rated value of the installed overcurrent protection device. The AC 230 V mains supply line must have an external circuit breaker with a rated current of no more than 10 A. Use only valve actuators rated for AC 230 V. ● Disconnect from supply before removing the unit from its mounting plate.
Advanced functions RDF270 fresh air unit controller provides different functions for equipment from basic with manual 3-speed fan to advanced with ECM fan, internal / external circulation and bypass function. Internal / External air circulation Some fresh air units only have a single duct and can be set to introduce fresh air from outside or circulate air via a built-in filter to maintain good air quality. Dual duct fresh air units enable both internal and external air circulation.
Proceed as follows to change the control parameters: Press and hold the + and - buttons simultaneously for more than 3 seconds. Service level: Release the buttons, and within 2 seconds, press and hold + until Pxx is displayed. Expert level: Release the buttons, and within 2 seconds, press and hold - until Pxx is displayed. Press + or - (< or >) to access the desired parameter and the value of the selected parameter is displayed at the same time. Press (✓) to edit the value of the required parameter.
Reload factory setting ● Select parameter P71 and set it to 1. ● The factory settings of the control parameters are reloaded. – “- - -” is displayed during reload.
Expert level (diagnostics & tests) Parameter Description Range d06 Software version xxx is displayed, e.g. 010 d07 Fresh air unit DC output check 0 = 0 % output 1...
Operating modes The following operating modes are available: Normal mode In Normal mode (ON), the controller displays the fan speed and air flow status. OFF mode In OFF mode, the controller is turned off. Timer with delay Off mode In timer with delay Off mode, the timer starts counting down according to the set hour when parameter P28 is enabled. When the timer expires, the device automatically turns off. 1.
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Output 3-speed fan Type Voltage Maximum current Q1…Q3 On/Off AC 230 V 5(3) A Bypass Q4 On/Off AC 230 V 5(3) A External/internal circulation Q5 On/Off AC 230 V 5(3) A ECM fan Type Voltage Maximum current Y50 Modulating DC 0…10 V 1.0/5.0/10.0 mA CAUTION If fans must be connected in parallel, connect one fan directly, for additional fans, one relay for each speed. Wiring connections Diameter Wire Max. 1.
Ambient conditions and protection classification Degree of protection of housing to EN 60529 Room automation station IP30. With terminal cover IP30.
Diagrams Connection terminals RDF270 L, N AC 230 V operating voltage Y50 DC 0…10 V output M Input reference ground for Y50 Q1 Output, fan speed 1, AC 230 V Q2 Output, fan speed 2, AC 230 V Q3 Output, fan speed 3, AC 230 V Q4 Output, bypass circulation, AC 230 V Q5 Output, external/internal circulation, AC 230 V Connection diagrams RDF270 3-speed or ECM fan L, N AC 230 V operating voltage Y50 DC 0…10 V output M Input reference ground for Y50 Q1, Q2, Q3 3-speed fan output (relay outpu
P25 EXT/INT P24 bypass P02 ON, FAU-ECO, OFF Application setup based on selection of fresh air unit Settings of these parameters, P02, P24 and P25 determine RDF270 functionality: Available function & user adjustment Typical applications / equipment Factory settings 1 1 1 1 2 0 1 0 1 0 0 0 1 1 0 ● ● Operating mode ( Fan speed: 1, 2, 3 ): ON, OFF ● Air circulation mode is fixed: 1.
P02 ON, FAU-ECO, OFF P24 bypass P25 EXT/INT 2 1 0 2 0 1 Available function & user adjustment ● ● ● Operating mode ( ): ON, OFF (since P25 = 0, no ECO mode) Fan speed: 1, 2, 3 Air circulation via manual selection when ON mode is selected: 1. External without bypass 2. External with bypass ● ● ● Operating mode ( ): ON, FAU ECO, OFF Fan speed: 1, 2, 3 Air circulation via manual selection when ON mode is selected: 1.
Dimensions (mm) 17 Siemens Smart Infrastructure A6V12068497_en--_b 2021-12-15
Issued by Siemens Switzerland Ltd Smart Infrastructure Global Headquarters Theilerstrasse 1a CH-6300 Zug +41 58 724 2424 www.siemens.com/buildingtechnologies Document ID A6V12068497_en--_b Edition 2021-12-15 © Siemens Switzerland Ltd, 2021 Technical specifications and availability subject to change without notice.
