RTKSA-203.000
Frost protection thermostat, 1.8m, IP40, hysteresis +3K, STB, 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. Unlocking is no longer possible. Note: Mounting brackets, immersion sleeves and protective coils are not included in the scope of delivery and must be ordered separately. 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.: KA020300
Technical data
| Ambient temperature, upper value | 80 °C |
| Bearing temperature, lower value | -30 °C |
| Bearing temperature, upper value | 80 °C |
| Capillary length | 1,8 m |
| Colour | Anthr. grey (RAL7016), frontp. transp. |
| Contact interlocking | Yes |
| Control range, lower value | -10 °C |
| Control range, upper value | 15 °C |
| Cooling control function | Yes |
| Depth | 57,5 mm |
| Device version | Surface-mounted unit |
| Diameter sensor element | 9,5 mm |
| Electric connection | Push-in terminal |
| Electronic control | No |
| External reset | Yes |
| External setting | No |
| Function type (systems engineering) | STB |
| Heating control function | Yes |
| Height | 146,8 mm |
| Internal setting | Yes |
| Length of sensor | 98 mm |
| Max. sensor temperature | 120 °C |
| Maximum air humidity (non-condensing) | 95 % r.H |
| Maximum switching current | O: 16 (2,5) A; S: 2 (0,4) A, 0,25 ADC |
| Maximum switching voltage | 230 V AC 50 / 60 Hz, 230 V DC |
| Minimum switching current | At 24 V (AC/DC) min. 100 mA |
| Minimum switching voltage | 24 V AC / 50 Hz, 24 V DC |
| Mounting / attachment | Wall mounting |
| Number of control ranges | 1 |
| Number of outputs | 2 |
| Operating voltage | None |
| Operation | Internal setpoint adjuster, reset button |
| Output signal | Switching |
| Potential free switching contact | Yes |
| Protection class | I |
| Safety and EMC | In accordance with DIN EN 60730 |
| Scale | Degree Celsius |
| Sensor element | Capillary tube |
| Sensor material | Cu |
| Switching contact | Two-way contact |
| Switching difference | Manual reset after +3K |
| Switching difference, can be adjusted | No |
| Switching element | Microswitch |
| Type of protection | IP40 |
| Width | 53 mm |
| With explosion protection | No |
| Circuit diagram | |
| Photo | Type | Articlenumber | Features | Kind |
|---|---|---|---|---|
 | JZ-29 | KA999901 | Fastening set for RTKSA THK/NTHK/SWK single controller | Accessories |
 | SWK-2-100 | KA989901 | Protective coil, 100mm, nickel-plated steel, inner x outer diameter 10.5x17mm | Accessories |
 | JZ-33 | KA999904 | Sealing set for universal capillary thermostats RTKSA-xxx.xxx | Accessories |
| SWK-2-200 | KA989903 | Protective coil, 200mm, nickel-plated steel, inner x outer diameter 10.5x17mm | Accessories |
 | TH-140 | C1809409 | Immersion sleeve, 140mm, nickel-plated brass, inner x outer diameter 10x12mm | Accessories |
| NTH-140 | C1809435 | Immersion sleeve, 140mm, V4A (1.4571), inner x outer diameter 10x12mm | Accessories |
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