Duct thermostat JTU-1 … -50 Capillary system – TÜV-tested
Technical data
Application
Housing colour: Sensor material:
grey
Minimum or maximum thermostat for inflow air monitoring and fan regula- tion in ventilation and air conditioning systems. Overheating protection thermostat for electrical heat registers and directly fired air heaters with oil and gas operation. Attention: Assemble the device in a vibration-free manner in order to avoid malfunctions and/or sensor rupture. JTU-20, -3: Type testing by TÜV in accordance with DIN EN 14597, for hot air heaters in accordance with DIN 4794
Cu
Ambient temperature: Permissible atmospheric humidity: Max. sensor temperature
–15 … +80 °C
Max. 95% rel. humidity, non-con- densing
200 °C
Operating voltage:
none
Max. switching current: Min. switching current: Max. switching voltage: Min. switching voltage: Switching element: Switching contact: Electrical connection: Mounting/attachment:
15 (8) A 150 mA
230 VAC, 50 Hz 24 VAC, 50 Hz
microswitch
toggler, potential-free screw-type terminals mounting on air duct
Protection rating: Protection class: Safety and EMC:
IP 40
I
according to DIN EN 60730
Sensor:
liquid-filled capillary, active over its entire length internal setting, scale: degrees Celsius
General features:
Type
Item no.
Control range
Hysteresis (approx.)
Capillary length
Features
PG
JTU-50
E6100000 –25…+65 °C 1.5 K
350 mm Control function: heating or cooling, TW 350 mm Control function: heating or cooling, TW, intrinsic safety, protection against cold 350 mm Control function: heating or cooling, locked when the temperature is rising, STB, intrinsic safety, protection against cold, overheating protection 1250 mm Control function: heating or cooling, locked when the temperature is rising, STB, intrinsic safety, protection against cold 350 mm Control function: heating or cooling, TW 350 mm Control function: heating or cooling, locked when the temperature is rising, TB
II
JTU-1
E6100012
20 … 100 °C 8 … 30 K adjustable
II
JTU-3
E6100036
20…100 °C external reset
II
JTU-20
E6100075
20…100 °C external reset
II
JTU-5
E6100048
60 … 140 °C 8 … 30 K adjustable
II
JTU-6
E6100051
60…140 °C external reset
II
TW = temperature monitor, STB = safety temperature limiter, TB = temperature limiter JTU-2 is replaced by JTU-3. Intrinsic safety / protection against cold: The devices are intrinsically safe, i.e., upon loss of the sensor medium owing to sensor rupture, for example, the burner is switched off. Since minus temperatures generate the same effect through volume reduction of the sensor medium, the devices are adjusted by means of the “cold screw” such that they switch off the burner only at temperatures below −15 °C. They can only be switched on again manually at temperatures above approx. –5 °C by means of the manual reset button. Overheating protection : This device provides protection from uncontrolled overheating, which is caused, for example, by a heat build-up or by creeping capillary filling losses when there is invisible damage to the sensor or the capillary tube etc. Upon reaching a temperature of 220 °C, the safety slot in the sensor melts and, in reaction to losing the filling medium, the device switches off the burner towards the safe side. The burner cannot be switched on
again. The device is then unusable and serves as evidence of the presence of an over-temperature of at least 220 °C. Locking: For types JTU-3, JTU-6 and JTU-20, a restart after cooling down is only possible by manual reset.
Catalogue 2022 | Page 180
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