Frost protection thermostat RTKSA Capillary system – TÜV-tested
Technical data
Application
Colour:
Anthracite grey (similar to RAL 7016), front side transparent
The RTKSA frost protection thermostat was designed especially for ensuring air or water- exposed frost protection for hot-water heating coils and heat exchangers in ventilation, heat- ing or air conditioning systems. The capillaries, except RTKSA-203.000/ RTKSA-204.000/RTKSA-204.020, are active along their entire length. The device actuates when the minimum response length of the cap- illary (at 3 m: 15 cm, at 6 m: 30 cm, at 12 m: 40 cm) reaches the set scale value. If a sensor rupture occurs, contact 1 – 2 is permanently opened and contact 1–4 is per- manently closed in the STB/STW application. Unlocking is no longer possible with STB. Air-exposed application: For the frost protection of heating coils (except RTKSA-203.000/RTKSA-204.000/ RTKSA-204.020) the capillaries are braced in front of the heating coil to be protected using mounting brackets. Mounting brackets JZ-05 / 6 M (metal) or JZ-05 / 6 K (plastic) should be used for this purpose. The RTKSA-203.000/RTKSA-204.000/ RTKSA-204.020 types can be used in con- junction with the SWK-2-xxx protection coils to measure the temperature of non-aggressive gases in the duct.
Sensor material: Cu Max. sensor temperature 120 °C Max. head temperature: 80 °C Permissible atmospheric humidity:
Max. 95% rel. humidity, non-condensing
Operating voltage:
none
Max. switching current:
NC contact: 16 (2.5) A at 230 VAC +10% 0.25 A at 230 VDC +10% NO contact STW: 6.3 (2.5) A at 230 VAC +10% 0.25 A at 230 VDC +10% NO contact STB: 2.0 (0.4) A at 230 VAC +10% 0.25 A at 230 VDC +10% Min. 100 mA at 24 V (AC/DC) 230 VAC 50/60 Hz, 230 VDC
Min. switching current: Max. switching voltage: Min. switching voltage:
24 VAC/50 Hz, 24 VDC
Switching element: Switching contact:
microswitch
toggler, potential-free
Control range:
−10 … +15 °C
Electrical connection: Mounting/attachment:
Push-in terminals
Wall mounting; controller hous- ing must be fitted in such a way that the ambient temperature is at least 2 K higher than the setpoint. I (including switch head and Cu capillary up to 4000 mm) In accordance with DIN EN 60730 (VDE 0631) Liquid-filled capillary, active over its entire length (except
Water-exposed application: The RTKSA-203.000/RTKSA-204.000/
RTKSA-204.020 types can be used in conjunc- tion with the TH-140 immersion sleeves for temperature measurement in non-aggressive fluids and in conjunction with the NTH-140 immersion sleeves in aggressive fluids. Note: Mounting flanges, immersion sleeves and protecting coils are not part of the delivery scope and must be ordered separately as accessories.
Protection class:
Safety and EMC:
Sensor:
RTKSA-203.000, RTKSA-204.000, RTKSA-204.020)
General features:
Scale: degrees Celsius
Type testing by TÜV in accordance with DIN EN 14597
Catalogue 2022 | Page 172
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