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Room thermostat for cooling ceilings, surface-mounted, 24V AC/V DC, 2-/4-pipe


Room thermostat for cooling ceilings, surface-mounted, 24V AC/V DC, 2-/4-pipe

Electronic surface-mounted climate controller for controlling heating/cooling in 2- and 4-pipe systems for hotels, residential properties and business premises. Up to 5 valve actuators (24V~, closed when de-energised or open when de-energised) can be controlled for each output. Especially suitable for controlling cooling ceilings due to the option of dew point monitoring via optional external dew point sensors. In order to compensate for the inertia of control paths with cooling ceilings, the device has a temperature sensor input for activating an external radiation sensor (optional). As a variant for public authorities that need the controller to be inaccessible to unauthorised people, the external sensor can also be implemented as a room sensor (optional). Using an internal Poti adapter, internal or external sensors, or both sensors, can be selected using adjustable weighting. The factory preset “zero point” of approx. 21…°C can be adjusted by +/- 5K in the device. The adjustment knob can be used to adjust the set temperature within the range +/- 3K of the set zero point. Contact inputs for ECO function and OFF (frost protection). In 2-pipe mode, the controller is operated with a combined heating/cooling output, which is switched via an external contact (changeover contact) or upstream sensor. Using a changeover contact and parallel wiring, it is possible to achieve central switching for up to 20 controllers. Contact opened and/or supply temperature < 20...°C = cooling mode, contact closed and/or supply temperature > 26…°C = heating mode.
  • Art.-Nr.: DA420600

    Technical data

    Actual temperature displayNo
    Additional heating switchNo
    Ambient temperature, lower value0 °C
    Ambient temperature, upper value40 °C
    AssemblyComplete device
    Bearing temperature, lower value-20 °C
    Bearing temperature, upper value70 °C
    ColourPure white
    Control behaviour2-point
    Control range, lower value13 °C
    Control range, upper value29 °C
    Cooling control functionYes
    Degree of contamination2
    Depth25,5 mm
    DesignBerlin 2000
    ECO function (reduction)Yes
    ECO input (reduction)24 V AC / 50 Hz, 24 V DC
    Electric connectionScrew terminals
    Electronic controlYes
    Energy efficiency classI
    External settingYes
    Heating / cooling switchNo
    Heating control functionYes
    Height83,4 mm
    Housing materialPlastic ABS
    Maximum air humidity (non-condensing)95 % r.H
    Maximum switching current1 A
    Maximum switching voltage24 V AC / 50 Hz, 24 V DC
    Mechanical range reductionYes
    Minimum switching voltage24 V AC / 50 Hz, 24 V DC
    Mounting / attachmentSurface mounting
    Neutral zoneApprox. 2 K
    Number of outputs2
    Number of outputs, cooling1
    Number of outputs, heating1
    Off / comfort / ECO switchNo
    On / Off switchNo
    Operating voltage24 V AC / 50 Hz, 24 V DC
    OperationRotary knob
    Output signalSwitching (24 V AC, 50 Hz and/or 24 V DC)
    Potential free switching contactNo
    Protection classIII
    RAL colour number (similar)9010
    Safety and EMCIn accordance with DIN EN 60730
    ScaleThreshold arrows with ”+” and ”-“
    Sensor elementNTC internal, optional NTC external
    Surface propertiesMatt
    Switch/lamp night-time reductionNo
    Switching contact2 normally open contacts
    Switching differenceApprox. 1 K
    Switching difference, can be adjustedNo
    Switching element2 relays
    Switching power24 W
    Temperature controller versionClimate controller
    Thermal feedbackNo
    Type of protectionIP30
    Width78,3 mm
    With explosion protectionNo
    Circuit diagram Circuit diagram
    Circuit diagram Circuit diagram




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