Field Instruments

General

The TF228WN 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  
• Ventilation mode  
• Manual or automatic 3-speed fan control  
• Water valve control  Besides the basic controls, TF228WN featuring CPH (Cycle Per Hour) better maintains the room temperature to the setpoint  and memorized time off function can automatically turn off the thermostat to save energy.  

In addition, Honeywell Random start-up function would help to maintain power grid stability.

Features

Memorized time off

Cycle Per Hour (CPH)

Random startup

LCD display with simple user interface

Room temperature or setpoint 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 setpoint limitation

Flush mount on standard 86 wall mounting box  

Specifications

• Make: Honeywell
• Model:  TF228WN
• Power supply: 220(+10%,-15%)VAC, 50Hz
• Control :  PI, On/off output                                        
• Accuracy: ±1°C at 21°C  
• Rating capacity: 3A for fan load, 2A for zone valve  
• Protection class: IP20  
• Set point range: 10 ~ 32°C  
• Display range :0 ~ 37°C

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