Honeywell Thermostat TF428WN/U

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General
The 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.
Specifications
Power supply 220/230VAC, 50/60Hz
110VAC,60Hz
Control PI, On/off output
Accuracy ±1°C at 21°C
Auto Cycle times 100,000 times
Manual Cycle times 10,000 times
Protection class IP20
Set point range 10 ~ 32°C
Display range 0 ~ 37°C
Ambient operating limits 0~ +49°C
Ambient storage limits -30 ~ +60°C
Humidity limits 5~90% RH, non-condensing
Remote temperature sensor NTC20K
Action Type: 1
Pollution Degree 2
Protection against electric shock class Class II
Electronic control software class Class A
Rated Impulse Voltage: 2500V
Maximum Temperature 155°C
Relay wiring
Wire Sectional area (Recommendation) 1.0~1.5mm2
Applied altitude up to 2000m above sea level
Rating Capacity
Working current for the whole product : 4(3)A
4A: When the load of the thermostat is resistance
3A: When the load of the thermostat is inductance

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