Honeywell TF428 series digital thermostat is designed for 3-speed
fan and valve control in a fan coil system, including:
2-pipe cool only/heat only/manual changeover
4-pipe cool/heat manual /automatic changeover
Ventilation mode
Manual or automatic 3-speed fan control
Water valve control
Besides the basic controls, TF428 series featuring CPH
(Cycle Per Hour) better maintains the room temperature to
the setpoint and Random Start-up Function would help to
maintain power grid stability.
In addition, Honeywell Memorized Time Off Function can
automatically turn off the thermostat to save energy.
Features:
Memorized time off
Cycle Per Hour (CPH)
Random startup
Remote temperature sensor optional
Energy saving mode optional
LCD display with simple user interface
Room temperature or set point temperature display
selectable
Manual or automatic fan speed selectable
Temperature units in either °C or °F
User setting can be stored with power loss
Freeze protection available
Four keypad lock options
Heating and cooling set point limitation
Honeywell RTH111B1024 Non-Programmable Digital Thermostat 
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