1. Introduction
This manual provides comprehensive instructions for the installation, operation, and maintenance of the Fantini Cosmi C50B Room Thermostat. The C50B is a flush-mounted digital thermostat designed for precise temperature control in heating and air conditioning systems within residential and industrial environments. It features a dual temperature display and operates on batteries.
Please read this manual thoroughly before installation and use to ensure proper function and safety.
2. Safety Information
- Electrical Safety: Installation and wiring must be performed by a qualified electrician in accordance with local electrical codes and regulations. Disconnect power to the heating/cooling system before any installation or maintenance.
- Battery Handling: Use only the specified battery type. Do not mix old and new batteries, or different types of batteries. Dispose of used batteries responsibly according to local regulations.
- Product Integrity: Do not attempt to disassemble or repair the thermostat yourself. Refer all servicing to qualified personnel.
- Environmental Conditions: Ensure the thermostat is installed in a location free from direct sunlight, drafts, and extreme temperatures or humidity, which could affect its accuracy.
3. Product Overview
The Fantini Cosmi C50B thermostat is designed for flush-mounting and integrates seamlessly into standard electrical boxes. It features an LCD display for current and set temperatures, along with intuitive push-button controls.
Figure 1: Front view of the Fantini Cosmi C50B Room Thermostat, showing the LCD display and control buttons. The display shows "FANTINI COSMI Therm C50B" and a temperature reading of "23.6". Below the display are four circular buttons and a slider switch labeled "C OFF".
Key Components:
- LCD Display: Shows current room temperature and set temperature.
- Control Buttons: Used for adjusting settings and modes.
- Mode Selector Switch: Typically allows selection between Comfort (C) and Off modes.
4. Setup and Installation
Important: Installation should only be carried out by qualified personnel. Ensure the main power supply to the heating/cooling system is disconnected before proceeding.
4.1. Mounting Location
Choose an interior wall location, approximately 1.5 meters (5 feet) from the floor, away from direct sunlight, heat sources, drafts, and windows. Avoid locations near external doors or areas with poor air circulation.
4.2. Wiring
- Disconnect power to the heating/cooling system at the main circuit breaker.
- Carefully remove the front cover of the thermostat to access the wiring terminals.
- Connect the thermostat wires according to the wiring diagram provided with your specific heating/cooling system and the C50B. Typically, this involves connecting two wires for control.
- Ensure all connections are secure and properly insulated.
4.3. Battery Installation
The C50B operates on batteries. Locate the battery compartment, typically on the rear or side of the unit. Insert the specified batteries, observing correct polarity (+/-). Close the battery compartment securely.
4.4. Final Assembly
- Mount the thermostat base onto the flush-mounted electrical box using the provided screws.
- Carefully reattach the front cover of the thermostat, ensuring it clicks securely into place.
- Restore power to the heating/cooling system at the main circuit breaker.
Figure 2: An important notice indicating that the finishing plate (or cover plate) for the flush-mounted installation is not included with the product. This means users may need to purchase a compatible plate separately to complete the installation aesthetics.
5. Operating Instructions
5.1. Power On/Off
After battery installation and power restoration, the thermostat should power on automatically. Use the mode selector switch (e.g., "C OFF" switch) to toggle between operating modes or to turn the unit off.
5.2. Setting Temperature
The C50B typically allows setting two temperature thresholds: Comfort (Day) and Economy (Night). Refer to the specific icons on your thermostat's buttons for precise adjustment.
- Adjusting Comfort Temperature: Press the button associated with the Comfort mode (often indicated by a sun icon or similar). Use the up/down arrow buttons to adjust the desired temperature. The display will show the set temperature temporarily.
- Adjusting Economy Temperature: Press the button associated with the Economy mode (often indicated by a moon icon or similar). Use the up/down arrow buttons to adjust the desired temperature.
The thermostat will maintain the room temperature according to the active mode's set point.
5.3. Display Information
The LCD display typically shows:
- Current Room Temperature: The actual temperature detected by the thermostat's sensor.
- Set Temperature: The target temperature for the active mode (may be shown temporarily during adjustment).
- Battery Indicator: An icon may appear to indicate low battery status.
- Mode Indicator: Icons or text indicating the currently active operating mode (e.g., heating on, cooling on, comfort mode, economy mode).
6. Maintenance
6.1. Cleaning
To clean the thermostat, gently wipe the surface with a soft, dry cloth. Do not use abrasive cleaners, solvents, or chemical sprays, as these can damage the display or casing.
6.2. Battery Replacement
When the low battery indicator appears on the display, replace the batteries promptly to ensure continuous operation. Follow these steps:
- Carefully remove the front cover of the thermostat.
- Remove the old batteries from the compartment.
- Insert new batteries of the correct type and size, ensuring correct polarity.
- Replace the front cover securely.
Note: Settings may be retained during battery replacement for a short period, but it is advisable to check and re-adjust if necessary after replacing batteries.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Thermostat display is blank. | No power; dead batteries. | Check battery installation and replace if necessary. Ensure main power to the system is on. |
| Heating/Cooling system not responding. | Incorrect wiring; thermostat in "Off" mode; system fault. | Verify wiring connections (consult a qualified electrician). Check thermostat mode. Ensure the heating/cooling system itself is operational. |
| Temperature reading seems inaccurate. | Thermostat location affected by drafts, direct sunlight, or heat sources. | Relocate the thermostat if possible, or shield it from environmental influences. Allow time for the sensor to stabilize. |
| Cannot change settings. | Buttons are locked; temporary software glitch. | Check if there's a button lock feature (refer to specific product documentation if available). Remove and reinsert batteries to reset the unit. |
If the problem persists after attempting these solutions, contact qualified service personnel.
8. Specifications
- Brand: Fantini Cosmi
- Model: C50B
- Type: Flush-mounted Room Thermostat
- Display Type: LCD
- Control Type: Push Button
- Power Source: Battery Powered
- Voltage: 230 Volts (for controlled system, thermostat itself is battery powered)
- Special Feature: Temperature Display
- Color: White
- Product Dimensions: 4.53 x 2.28 x 2.56 inches (11.5 x 5.8 x 6.5 cm)
- Item Weight: 3.17 ounces (0.09 Kilograms)
- Connectivity Technology: Wi-Fi (Note: Product specifications list Wi-Fi, but description and features suggest a basic non-programmable thermostat. Verify with product documentation if advanced features are expected.)
9. Warranty and Support
Fantini Cosmi products are manufactured to high-quality standards. For specific warranty terms and conditions, please refer to the warranty card included with your product or visit the official Fantini Cosmi website. Keep your proof of purchase for warranty claims.
For technical support, troubleshooting assistance beyond this manual, or spare parts, please contact Fantini Cosmi customer service or your authorized dealer.
