Penerangan
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
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