Details

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Overview

The Honeywell TF228WN is a digital thermostat designed for 3-speed fan and valve control in fan coil systems. It ensures efficient temperature management with advanced features like Cycle Per Hour (CPH) control, memorized time-off function, and random startup to maintain power grid stability.

Key Features

✅ Versatile Fan Coil System Control

• Supports 2-pipe systems: Cool only, Heat only, or Manual changeover
• Ventilation mode for fresh air circulation
• Manual or automatic 3-speed fan control
• Water valve control for optimized heating/cooling

✅ Advanced Performance & Energy Efficiency

• Cycle Per Hour (CPH): Improves temperature stability and efficiency
• Memorized Time-Off Function: Automatically turns off the thermostat to save energy
• Random Startup: Helps stabilize power grid load

✅ User-Friendly Design

• LCD display with an intuitive interface
• Selectable Room temperature or Setpoint temperature display
• Temperature units available in °C or °F
• Four keypad lock options for security
• Freeze protection prevents pipes from freezing in cold conditions
• Heating & cooling setpoint limitations to prevent excessive energy usage

✅ Reliable & Durable

• User settings remain stored even after power loss
• Flush mount design for seamless installation on standard 86mm wall boxes

Technical Specifications

- Power Supply: 220V AC (+10%, -15%), 50Hz

- Control: PI (Proportional-Integral) & On/Off output

- Accuracy: ±1°C at 21°C

- Rating Capacity:

• 3A for fan load
• 2A for zone valve

- Protection Class: IP20

- Setpoint Range: 10°C to 32°C

- Display Range: 0°C to 37°C

- Ambient Operating Limits: 0°C to +49°C

- Ambient Storage Limits: -30°C to +49°C

- Humidity Limits: 5% to 90% RH, non-condensing