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Frost protection thermostat, 1.8m, IP65, hysteresis 1.5K, STW, internal setting, external resetting


Frost protection thermostat, 1.8m, IP65, hysteresis 1.5K, STW, internal setting, external resetting

The RTKSA frost protection controllers were specially developed for air or water-side frost protection of hot water heater registers and heat exchangers in ventilation, heating or air conditioning systems. If the sensor breaks, contact 1 – 2 is permanently opened and contact 1 – 4 is permanently closed. Note: Mounting brackets, immersion sleeves and protective coils are not included in the scope of delivery and must be ordered separately. Air-side application: The SWK-2-xxx protective coils can be used to measure the temperature of non-aggressive gases in the duct. Water-side application: For temperature measurement in non-aggressive fluids, the immersion sleeves THK-2-xxx and in aggressive fluids the immersion sleeves NTHK-2-xxx can be used.
  • Art.-Nr.: KA020401

    Technical data

    Ambient temperature, upper value80 °C
    Bearing temperature, lower value-30 °C
    Bearing temperature, upper value80 °C
    Capillary length1,8 m
    ColourAnthr. grey (RAL7016), frontp. transp.
    Contact interlockingNo
    Control range, lower value-10 °C
    Control range, upper value15 °C
    Cooling control functionYes
    Depth53 mm
    Device versionSurface-mounted unit
    Diameter sensor element9,5 mm
    Electric connectionPush-in terminal
    Electronic controlNo
    External settingNo
    Function type (systems engineering)STW
    Heating control functionYes
    Height146,8 mm
    Internal settingYes
    Length of sensor98 mm
    Max. sensor temperature120 °C
    Maximum air humidity (non-condensing)95 % r.H
    Maximum switching currentO: 16 (2,5) A; S: 6,3 (2,5) A, 0,25 ADC
    Maximum switching voltage230 V AC 50 / 60 Hz, 230 V DC
    Minimum switching currentAt 24 V (AC/DC) min. 100 mA
    Minimum switching voltage24 V AC / 50 Hz, 24 V DC
    Mounting / attachmentWall mounting
    Number of control ranges1
    Number of outputs2
    Operating voltageNone
    OperationInternal setpoint adjuster
    Output signalSwitching
    Potential free switching contactYes
    Protection classI
    Safety and EMCIn accordance with DIN EN 60730
    ScaleDegree Celsius
    Sensor elementCapillary tube
    Sensor materialCu
    Switching contactTwo-way contact
    Switching difference1.5 K
    Switching difference, can be adjustedNo
    Switching elementMicroswitch
    Type of protectionIP65
    Width57,6 mm
    With explosion protectionNo
    Circuit diagram Circuit diagram


    Info sheet

    Assembly instructions


    JZ-29KA999901Fastening set for RTKSA THK/NTHK/SWK single controllerAccessories
    SWK-2-100KA989901Protective coil, 100mm, nickel-plated steel, inner x outer diameter 10.5x17mmAccessories
    SWK-2-200KA989903Protective coil, 200mm, nickel-plated steel, inner x outer diameter 10.5x17mmAccessories
    JZ-33KA999904Sealing set for universal capillary thermostats RTKSA-xxx.xxxAccessories
    TH-140C1809409Immersion sleeve, 140mm, nickel-plated brass, inner x outer diameter 10x12mmAccessories
    NTH-140C1809435Immersion sleeve, 140mm, V4A (1.4571), inner x outer diameter 10x12mmAccessories

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