Helios Ventilatoren EST Electronic thermostat

For controlling a KTR type climate control controller. Versatile control variables, dirt-resistant membrane keyboard. Temperature-dependant, five-stage fan control with min. / max. voltage, minimum air rate can be switched on/off, ventilation flap control (0...10 V), control of a frequency converter (0...10 V) and a heating thermostat, temperature monitor (under/over temperature with outdoor temperature compensation).

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