JTF-21/12
Frost protection thermostat, capillary length 12m, external setting, 2-stage
For securing hot water heating coils against freezing. The unit is intrinsically safe and has a sealable setpoint adjustment.
For measuring the temperature of non-aggressive gases. The JTF-21 frost protection monitor has 2 switching outputs, which makes it possible to override the system before the danger point is reached. When fixing the capillary tube, mounting brackets JZ-05 / 6 M (metal) or JZ-05 / 6 K (plastic) should be used upstream of the heating coil. The capillary tube is active along its entire length. The device reacts when approx. 60 cm of the capillary reaches the adjusted scale value. Mounting brackets, immersion sleeves and protective coils are not included in the delivery and must be ordered separately. Hysteresis between the stages approx. 5 K.
Art.-Nr.: E6090330
Technical data
| Ambient temperature, lower value | -10 °C |
| Ambient temperature, upper value | 55 °C |
| Bearing temperature, lower value | -10 °C |
| Bearing temperature, upper value | 55 °C |
| Capillary length | 12 m |
| Colour | Grey |
| Contact interlocking | No |
| Control range, lower value | -10 °C |
| Control range, upper value | 12 °C |
| Cooling control function | Yes |
| Degree of contamination | 2 |
| Depth | 55 mm |
| Device version | Surface-mounted unit |
| Electric connection | Screw terminals |
| Electronic control | No |
| External setting | Yes |
| Function type (systems engineering) | TR |
| Heating control function | Yes |
| Height | 112 mm |
| Housing material | Plastic |
| Internal setting | No |
| Max. sensor temperature | 200 °C |
| Maximum air humidity (non-condensing) | 95 % r.H |
| Maximum switching current | 15 (8) A |
| Maximum switching voltage | 230 V AC, 50 Hz |
| Medium | Air, not aggressive |
| Minimum switching current | 150 mA |
| Minimum switching voltage | 24 V AC / 50 Hz |
| Mounting / attachment | Wall mounting |
| Number of control ranges | 1 |
| Number of outputs | 2 |
| Operating voltage | None |
| Operation | Empty |
| Output signal | Switching |
| Potential free switching contact | Yes |
| Protection class | I |
| Rated impulse voltage | 4000 V |
| Safety and EMC | In accordance with DIN EN 60730 |
| Scale | Degree Celsius |
| Sensor element | Capillary tube |
| Sensor material | Cu |
| Surface properties | Matt |
| Switching contact | 2 two-way contacts |
| Switching difference | Approx. 1 K |
| Switching difference, can be adjusted | No |
| Switching element | Microswitch |
| Switching power | 3450 W |
| Type of protection | IP40 |
| Width | 105 mm |
| With explosion protection | No |
| Circuit diagram | |
| Photo | Type | Articlenumber | Features | Kind |
|---|---|---|---|---|
 | JZ-07 | E6160145 | Mounting bracket for frost protection thermostat JTF | Accessories |
 | JZ-05/1M | C1809462 | Individual mounting bracket (metal) for frost protection thermostat JTF / RTKSA | Accessories |
 | JZ-05/6K | C1809536 | Mounting brackets (plastic) for frost protection thermostat JTF / RTKSA, 6 pcs. | Accessories |
 | JZ-04 | E6160133 | Capillary tube duct for JTF frost protection thermostats and JMT/WR/JET capillary controllers | Accessories |
 | JZ-05/6M | C1809474 | Mounting brackets (metal) for frost protection thermostat JTF/RTKSA, 6 pcs. | Accessories |
Contact request
Do you have questions or are you interested in our products?
Please contact the electrician you trust or write us a message.
