JUMO warm air thermostat WTHc-2280 remote cable 350 mm

• Suitable for use in warm air heating systems according to DIN 4794 and consist of 3 separate measuring and switching systems with the functions temperature controller TR, temperature monitor TW and safety temperature limiter STB.
• In the event of malfunctions, the STB puts the monitored system into a safe operating state.
• They operate on the principle of fluid expansion.
• The electrical switching elements are microswitches.

Temperature monitor TW and safety temperature limiter STB

• If the temperature at the temperature sensor exceeds the set limit, the circuit is opened and the microswitch is mechanically locked.
• Once the danger temperature has dropped by approximately 10 K, the microswitch can be manually unlocked.
• Self-monitoring at the safety temperature limiter (STB)
• If the measuring system is destroyed, i.e., if the expansion fluid escapes, the pressure in the diaphragm of the STB drops and permanently opens the circuit.
• Unlocking is no longer possible.
• When the sensor cools down to a temperature below 20°C, the circuit also opens, but closes automatically again when the temperature rises.

• Switching capacity: 10 A/AC 230 V
• Control range TR: 2080°C
• Control range 2 TW: 7090°C
• Standard temperature limiter (STB) calibration point: +100°C
• Sensor diameter (mm): 4