Field Instruments

General

The RTF428WNM/U communicating 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 on/off control

The RTF428WNM/U is available in Modbus RTU protocol and can be easily integrated into building automation system.

Features:

• RS485 interface in Modbus RTU slave mode
• 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 when power loss
• Freeze protection function available
• Keypad lock options

Specifications

• Make : Resideo  
• Model: RTF428WNM/U
• Physical Layer: EIA485
• Protocol: Modbus RTU
• Rated Power & Frequency: 220/230VAC, 50/60Hz
• Power consumption: <2W
• Control: PI, On/off output
• Accuracy: ±1°C at 21°C
• Auto Cycle times: 100,000 times

Fieldinstruments.lk
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Phone: +94718555888 Email: info@fieldinstruments.lk