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Frost protection thermostat, capillary length 12m, external setting, 2-stage

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JTF-21/12

Frost protection thermostat, capillary length 12m, external setting, 2-stage

For protecting hot water heating registers against freezing. The device is intrinsically safe and has a sealable setpoint adjustment. For temperature measurement of non-aggressive gases. The JTF-21 frost protection monitor has 2 switching outputs, allowing intervention in the system before the danger point is reached. The JZ-05/6M (metal) or JZ-05/6 K (plastic) mounting clamps must be used to clamp the capillary in front of the heating coil. The capillary is active along its entire length. The device responds when approx. 60 cm of capillary reaches the set scale value. Mounting clamps, immersion sleeves and protective coils are not included in the scope of delivery and must be ordered separately. The hysteresis between the stages is approx. 5 K.
    • Art.-Nr.: E6090330

    Technical data

    Ambient temperature −10 … 55 °C
    Bearing temperature –10 … 55 °C
    Capillary length 12 m
    Colour grey
    Contact interlocking No
    Control range -10 … 12 °C
    Cooling control function Yes
    Degree of contamination 2
    Device version surface-mounted unit
    Dimensions (W x H x D) 105 mm x 112 mm x 55 mm
    Electric connection screw terminals
    Electronic control No
    External setting Yes
    Function type (systems engineering) TR
    Heating control function Yes
    Housing material plastic
    Internal setting No
    Max. air humidity (non-condensing) 95 % r.H.
    Max. Sensor temperature 200 °C
    Max. switching current 15 (8) A
    Max. switching voltage 230 VAC, 50 Hz
    Medium Air
    Min. switching current 150 mA
    Min. switching voltage 24 VAC, 50 Hz
    Montage/Befestigung wall mounting
    Number of control ranges 1
    Number of outputs 2
    Output signal switching
    Potential free switching contact Yes
    Protection class I
    Rated impulse voltage 4000 V
    Safety and EMC in accordance with DIN EN 60730
    Scale Degree Celsius
    Sensor element capillary tube
    Sensor material Cu
    Surface finish matt
    Switching contact 2 two-way contacts
    Switching difference, can be adjusted No
    Switching differential Heating/cooling: 1 K
    Switching element microswitch
    Switching power 3450 W
    With explosion protection No

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