Room Thermostat FB-KT-4

Room Thermostat FB-KT-4

The FB-KT 4 series room thermostat is designed for the automatic provision of boilers, circulation pumps, zone valves, underfloor heating circuit or fan control.

Terminals

The terminal size allows the connection of up to 2 single or multi-wire cables with a cross-section of 1.0 mm2 to 2.5 mm2. Securely secure electrical connections at each terminal athere is a suitable clip for corrugated and Phillips screwdrivers.

Working principle

The sensor of the thermostat consists of two round flexible metal plates welded together at the edges, with a gap filled with a small amount of liquefied gas (0.125 g), the pressure of which varies greatly in response to small fluctuations at room temperature. In fact, this double diafram creates an expanding/tightening cavity in response to temperature changes, so this action serves to activate a momentary switch designed to control the heating or cooling circuit.

Parameters

While the sensor is connected, a maximum difference of 1.0 ° C occurs at 20 ° C with a gradual heating change of 3 ° C per hour. The typical differential is 0.5 °C.

Keyword

More than 100,000 switching operations have been foreseen for the master key (all loads have been calculated). For auxiliary on/off or heating/cooling switches, the predicted number is 10,000 switching operations.

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