The TF428 RSBS/RSS series digital thermostat are designed for 3 speed fan and on/off valve control in a fancoil system, including:
2-pipe cool only/heat only/manual changeover
4-pipe manual/auto changeover(VC4013 valve only)
Ventilation mode
Manual or automatic 3-speed fan control
On/off water valve control
Besides the basic controls, TF428 RSBS/RSS series featuring CPH (Cycle Per Hour) better maintains the room temperature to the setpoint and Random Start-up Function helps maintain power grid stability. In addition, the Memorized Time Off function can automatically turn off the thermostat to save energy.
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