SystemAir 189421 Data Sheet / Manual Download Page 1

TControl Easy DX-Air Curtain (Item No. 189421) 

Room thermostat for DX air curtain

 

 

 

 

SYSTEMAIR GmbH German

[email protected]

 ode

http://www.systemair.de

 

 

Issue date: 03.11.2020

  

 

 

 

 

 

 

 

 

 

 

Page 1 / 11 

 

Datasheet

 

Subject to technical alteration 

Issue date: 03.11.2020 • A104 

 

 

 

 

 

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APPLICATION 

The room control unit is used for individual control of DX door air curtains in combination with a Systemair DX outdoor unit for either single split or 

VRF2 outdoor units. With its flush mounted modern design the device combines digital technology with a large LCD display and additional buttons, 

which enables the single room controller to be used intuitively.. Furthermore, the operating unit has an integrated Modbus interface. The device is 

designed for mounting in a flush-mounted box. 

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SECURITY ADVICE – CAUTION 

The installation and assembly of electrical equipment should only be performed by authorized personnel. 
The product should only be used for the intended application. Unauthorised modifications are prohibited! The product must not be 

used in relation with any equipment that in case of a failure may threaten, directly or indirectly, human health or life or result in 

danger to human beings, animals or assets. Ensure all power is disconnected before installing. Do not connect to live/operating 

equipment.  

CAUTION! Risk of electric shock due to live components within the enclosure, especially devices with mains voltage 

supply (usually between 90..265 V). 

Please comply with 

 

Local laws, health & safety regulations, technical standards and regulations 

 

Condition of the device at the time of installation, to ensure safe installation 

 

This data sheet and installation manual 

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NOTES ON DISPOSAL 

As a component of a large-scale fixed installation, Systemair products are intended to be used permanently as part of a building 

or a structure at a pre-defined and dedicated location, hence the Waste Electrical and Electronic Act (WEEE) is not applicable. 

However, most of the products may contain valuable materials that should be recycled and not disposed of as domestic waste. 

Please note the relevant regulations for local disposal. 

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PRODUCT TESTING AND CERTIFICATION 

Declaration of conformity 

The declaration of conformity of the products can be found on our websit

https://www.systemair.com/

. 

 

 

Summary of Contents for 189421

Page 1: ...n with any equipment that in case of a failure may threaten directly or indirectly human health or life or result in danger to human beings animals or assets Ensure all power is disconnected before installing Do not connect to live operating equipment CAUTION Risk of electric shock due to live components within the enclosure especially devices with mains voltage supply usually between 90 265 V Ple...

Page 2: ... limited in time are TECHNICAL DATA Measuring values temperature Output voltage terminal 1 2 2x 0 10 V for heating and cooling min load 10 kΩ terminal 1 3 terminal 1 4 2x 0 10 V for fan min load 10 kΩ Output switch contact terminal 6 8 Cooling 250 V max load 3 A terminal 7 8 Heating 250 V max load 3 A Network technology RS485 Modbus RTU half duplex baud rate 4 800 9 600 19 200 or 38 400 parity non...

Page 3: ...or DX air curtain SYSTEMAIR GmbH Germany info systemair de oder http www systemair de Issue date 03 11 2020 Page 3 11 CONNECTION PLAN Terminal 4 is designed for an additional 2nd fan and outputs the same actuating signal in parallel with terminal 3 DISPLAY PANEL ...

Page 4: ... parameter can be increased decreased using the or keys With the Mode Key the display will move on to the next parameter Once the end of the table is reached the parameter setting will be exited to normal operation Nr Parameter Beschreibung Standardeinstellung 1 Language setting 0 Deutsch 1 Englisch 0 2 Unit system temperature 0 C 1 F 0 3 Sensor configuration 0 internal sensor 1 external sensor NT...

Page 5: ...n the floor Pressing the button once switches the display on and the device to ECO mode In ECO mode it controls the room temperature to the setpoint predefined by register 275 and 276 0x0113 0x0114 The display will show the average of both ECO Setpoint Temperatures 25 18 2 21 5 and the leaf symbol to indicate the ECO mode In ECO mode the setpoint is fixed and the device does not react to any butto...

Page 6: ...ill appear for 2s and blink 2x but no further action is taken Power failure Restart selection Register address 0x010C On the LCD there are three symbols that define how the thermostat will restart after a power failure Keep thermostat switched OFF Switch thermostat to last state before power failure Record and Memorize Turn the thermostat ON Storage during power loss The status will be kept in EEP...

Page 7: ... Low 0b00000010 Stage Medium 0b00000100 Stage High 0b00001000 Auto OFF 0b00001001 Auto Low 0b00001010 Auto Medium 0b00001100 Auto High 5 0x0005 Read only Output valve actuator heating cooling 0 100 0 0 Off 100 On 8 0x0008 Read only external temperature sensor C 200 1000 20 0 100 0 C 0 1 C 9 0x0009 Read only failure status 0x00 no failure 0x01 control loop temperature sensor alarm 0x02 external tem...

Page 8: ...eep off after power on reset 1 return to last stFate after power failure 2 switch on after power on reset 1 269 0x010D Read write Key lock 0x00 unlocked 0x01 lock on off 0x02 lock mode 0x04 lock clock 0x08 lock fan speed 0x10 lock temp setting 0x1F lock all keystrokes Once a locked key is pressed the LOCK symbol shall be displayed and blink twice 0 270 0x010E Read write Display Settings 0b00000001...

Page 9: ...283 0x011B Read write Deadband 1 100 0 1 10 0 C F 0 1 C F 10 284 0x011C Read write Heating Proportional Band Xp_heat 1 100 0 1 10 0 C F 0 1 C F 20 285 0x011D Read write Heating Integration Time Tn_heat 0 255 0 255 Minutes 1 0 min 30 286 0x011E Read write Cooling Proportional Band Xp_cool 1 100 0 1 10 0 C F 0 1 C F 20 287 0x011F Read write Cooling Integration Time Tn_cool 0 255 0 255 Minutes 1 0 mi...

Page 10: ...mperature 0 500 0 50 0 C 0 1 C 0 514 0x0202 Read write Controller mode Comfort 0b0000 0000 controller off Frost protection active 0b0000 0001 controller auto mode heating cooling 0b0000 0010 controller heating mode only 0b0000 0011 controller cooling mode only 0b0000 0100 ventilating PI loop controls fan stages only valves closed 0 Controller mode ECO 0b0001 0000 controller off Frost protection ac...

Page 11: ...systemair de Issue date 03 11 2020 Page 11 11 MOUNTING ADVICE DIMENSIONS MM For installing or maintenance please make sure the power is disconnected Fix the thermostat base plate to the wall through the four screw holes with distance between axes of 60 mm Fasten base plate and front cover Do not press the panel in order to protect LCD ...

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