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Frost Protection Thermostats


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.

Application/type Frost protection thermostat
Purpose Measure values
Measured values temperature
Interface Active, 0..10 V, Switch contact
Functions to control valve actuators, integrated controller, integrated P controller, frost protection, alarm in case of cable break or short circuit of the sensor, alarm setpoint 0..+16 °C (switching hysteresis 0..+3 °K adjustable)
Operating elements 2 rotary knobs (Talarm and Xp)
Configuration DIP switches
Output voltage 0..10 V (measured temperature value 0..+100 °C), 0..10 V (control value for valve actuator 0..+100%), max. load 10 mA
Output switch contact NO contact fan, floating, for 250 V ~, load max. 6 A, NO contact alarm, floating, for 30 V ~, load max. 1 A
Input 1x input sensor PT1000 (default), NTC10K, Ni1000, Ni1000TK5000, 1x input for external controller for defining set point, 1x input for floating contact
Operating range temperature (°C) -40..+70
Output signal temperature 0..+100 °C
Operating range humidity max. 85% rH non-condensing
Power supply 15..24 V = (±10%) SELV, 24 V ~ (±10%) SELV
Power consumption max. 2 VA (24 V ~)
Enclosure ABS
Colour white
Protection (IP) IP20, according to EN 60529
Connection removable plug-in terminal, max. 2,5 mm²
Mounting prepared for mounting on DIN rail TS35 (35x7,5 mm) according to EN 60715
Packaging length (mm) 90
Packaging width (mm) 90
Packaging height (mm) 80
Packaging case packaging
Device length (mm) 91
Device width (mm) 53
Device height (mm) 60
Comparison list


Item No.: 667203
131.20 EUR