TFRe
Electronic frost protection thermostat for downstream temperature monitoring of e.g. heat exchangers in ventilation and air-conditioning systems. Integrated P-controller for constant control of a heat exchanger valve within its intended operating range. Safety shutdown of the fan and - if necessary - closing the air inlet flaps to protect the heat exchanger in case set thresholds are exceeded. Temperature measurement optionally with a contact sensor, immersion sensor or cable sensor with up to four selectable sensor characteristic curves. For a quick temperature measurement in the return water pipe of the heat exchanger, a fast-response sensor (e.g. TF14 with KL4VA) should be used.
| Measured values | temperature |
|---|---|
| Output voltage | 2x 0..10 V, temperature, actuating variable valve drive |
| Output switch contact | Fan: floating contact NO, 250 V ~ / 6 A, Alarm: floating contact NO, 30 V ~ / 1 A |
| Power supply | 15..24 V = (±10%) or 24 V ~ (±10%) SELV |
| Power consumption | max. 2 VA (24 V ~) |
| Measuring range temp. | -10..+100 °C |
| Accuracy temperature | ±1 K (typ. at 0 °C) |
| Inputs | for passive sensor NTC10K (default), PT1000, Ni1000, Ni1000TK5000, adjustable, for external controller defining control value for valve, for fan (floating contact) |
| Functions | frost protection function, controlling valve actuator, alarm, adjustable P-Controller (temperature) |
| Display | LED green – indicator valve actuator, LED red – alarm, LED yellow – fan |
| Enclosure | ABS, white |
| Protection (IP) | IP20 according to EN 60529 |
| Electrical connection | removable plug-in terminal, max. 2,5 mm² |
| Ambient condition | -40..+70 °C, max. 85% rH non-condensing |
| Mounting | prepared for mounting on DIN rail TS35 (35x7,5 mm) according to EN 60715 |