Heating technology
Air conditioning
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Building automation
Sensors
RTKSA-203.000
Frost protection thermostat, 1.8 m, IP40, hysteresis +3 K, STB, indoor setting, outdoor reset
The RTKSA frost protection controllers have been specially developed for frost protection on the air or water side of hot water heating registers and heat exchangers in ventilation, heating or air conditioning systems. In the event of a sensor break, contact 1-2 is permanently opened and contact 1-4 is permanently closed. Unlocking is no longer possible. Note: Mounting clamps, thermowells 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 for temperature measurement of non-aggressive gases in the duct. Water-side application: The THK-2-xxx thermowells can be used for temperature measurement in non-aggressive fluids and the NTHK-2-xxx thermowells can be used in aggressive fluids.
| Number of outputs | 2, 2 |
|---|---|
| Number of control ranges | 1 |
| Output signal | switching |
| External setting | No |
| External reset | Yes |
| Operation | internal setpoint adjuster, start button |
| Diameter sensor element | 9.5 mm |
| Electric connection | Push-in clamp |
| Electronic control | No |
| With explosion protection | No |
| Colour | anthracite |
| Sensor element | capillary tube |
| Function type (systems engineering) | STB |
| Device version | surface-mounted unit |
| Internal setting | Yes |
| Contact interlocking | Yes |
| Bearing temperature | –30 … 80 °C |
| Length of sensor | 98 mm |
| Capillary length | 1.8 m |
| Max. air humidity (non-condensing) | 95 % r.H. |
| Sensor material | Cu |
| Max. Sensor temperature | 120 °C |
| Max. switching voltage | 230 VAC, 50/60 Hz / 230 VDC |
| Max. switching current | 16 (2,5) A, 0,25 A |
| Min. switching voltage | 24 VAC, 50 Hz / 24 VDC |
| Min. switching current | at 24 V (AC/DC) min. 100 mA |
| Mounting/attachment | |
| Control range | -10 … 15 °C, -10 … 15 °C |
| Heating control function | Yes |
| Cooling control function | Yes |
| Switching differential | manual reset according to 3 K (Heating/cooling) |
| Switching difference, can be adjusted | No |
| Switching element | |
| Switching contact | two-way contact |
| Potential free switching contact | Yes |
| Protection class | IP40 |
| Protection class | I |
| Safety and EMC | in accordance with DIN EN 60730 |
| Scale | Degree Celsius |
| Dimensions (W x H x D) | 53 mm x 146,8 mm x 62,9 mm |
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