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

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

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. The switch can be used to select the off/comfort/ECO operating modes. 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). 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. 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. Contact inputs for ECO function and OFF (frost protection).
Product inquiry
  • Art.-Nr.: DA420700

    Technical data

    number of outputs2
    number of outputs, heating1
    number of outputs, cooling1
    actual temperature displayNo
    temperature controller versionclimate controller
    output signalswitching (24 V AC, 50 Hz and/or 24 V DC)
    external settingYes
    operationrotary knob and switches
    operating voltage24 V AC / 50 Hz, 24 V DC
    designBerlin 2000
    ECO input (reduction)24 V AC / 50 Hz, 24 V DC
    ECO function (reduction)Yes
    electric connectionscrew terminals
    electronic controlYes
    energy efficiency classI
    with explosion protectionNo
    RAL colour number (similar)9010
    sensor elementNTC internal, optional NTC external
    bearing temperature, upper value70°C
    bearing temperature, lower value-20°C
    maximum air humidity (non-condensing)95% r.H
    housing materialplastic ABS
    maximum switching voltage24 V AC / 50 Hz, 24 V DC
    maximum switching current1 A
    mechanical range reductionYes
    minimum switching voltage24 V AC / 50 Hz, 24 V DC
    mounting / attachmentsurface mounting
    neutral zoneapprox. 2 K
    surface propertiesmatt
    control range, upper value29°C
    control range, lower value13°C
    heating control functionYes
    cooling control functionYes
    control behaviour2-point
    switching differenceapprox. 1 K
    switching difference, can be adjustedNo
    switching elementrelay
    Off / comfort / ECO switchYes
    On / Off switchNo
    heating / cooling switchNo
    additional heating switchNo
    switch/lamp night-time reductionNo
    switching contact2 normally open contacts
    potential free switching contactNo
    switching power24 W
    type of protectionIP30
    protection classIII
    Safety and EMCin accordance with DIN EN 60730
    scaletapering arrow indicator with “+” and “-”
    thermal feedbackNo
    ambient temperature, upper value40°C
    ambient temperature, lower value0°C
    degree of contamination2
    assemblycomplete device
    Circuit diagram Circuit diagram
    Circuit diagram Circuit diagram



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