Optimized for temperature and pressure control in connection with modulating or multi-stage burners and air-conditioning systems. The RWF55 is used primarily for the control of temperature or pressure in oil- or gasfired heating plants. Depending on the setting, it is employed as a compact 3-position controller or as a modulating controller with an analog output. An external switch is provided to convert it to a 2-position controller for controlling 2-stage burners. The builtin thermostat function switches the burner on and off. The controller’s operating mode can be changed from heating to cooling, or vice versa.
The controllers feature two 4-digit 7-segment displays for the actual value (red) and the setpoint (green). The RWF55 has a 3-position output consisting of 2 relays to open or close a controlling element. There is also an analog output and a multifunctional relay (K6), which can be used to set 12 different switching functions.
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