1. Introduction
The Honeywell MT200 T4360A1009 is a robust room thermostat designed primarily for frost protection. This device automatically safeguards your heating system, including boilers and pipework, against freezing temperatures. It is capable of directly switching a circulation pump or boiler to maintain a safe minimum temperature.
This manual provides essential information for the safe and efficient installation, operation, and maintenance of your Honeywell MT200 T4360A1009 thermostat.
2. Important Safety Information
- Electrical Hazard: Installation and wiring must be performed by a qualified electrician or competent person in accordance with all local and national electrical codes. Ensure the main power supply is disconnected before commencing any installation or maintenance work.
- Live Terminals: The internal terminals of the thermostat carry live voltage. Do not remove the protective cover or attempt to adjust internal components while power is connected.
- Intended Use: This thermostat is designed for frost protection and general room temperature control within its specified range. Do not use it for purposes other than its intended application.
- Maximum Load: Do not exceed the specified maximum electrical load of 10 A resistive or 3 A inductive. Overloading can cause damage to the unit and create a fire hazard.
3. Package Contents
Please check the package contents upon receipt. It should include:
- Honeywell MT200 T4360A1009 Frost Protection Room Thermostat Unit
- Protective Cover
- Mounting Screws (may vary by region)
No batteries are required for the operation of this corded electric thermostat.
4. Installation
The Honeywell MT200 T4360A1009 thermostat should be installed in a location that accurately reflects the room temperature and is not subject to direct sunlight, drafts, or heat sources. For optimal performance, mount the unit on an interior wall, approximately 1.5 meters (5 feet) from the floor.
4.1. Mounting
- Disconnect Power: Ensure the main power supply to the heating system is switched off at the consumer unit/fuse box before proceeding.
- Remove Cover: Carefully remove the front cover of the thermostat to access the mounting holes and wiring terminals.
- Positioning: Hold the thermostat base against the wall at the desired mounting location. Mark the positions for the mounting screws.
- Drill Holes: Drill pilot holes if necessary and insert wall plugs suitable for your wall type.
- Secure Base: Fasten the thermostat base securely to the wall using the provided screws.
4.2. Wiring
WARNING: All wiring must comply with local electrical regulations and be carried out by a qualified professional.
- Connect the electrical supply wires to the appropriate terminals as indicated in the wiring diagram provided with your unit (refer to the diagram on the back of the thermostat or in the full installation guide).
- Ensure all connections are secure and correctly insulated.
- The thermostat is designed to switch a maximum electrical load of 10 Amperes (resistive) or 3 Amperes (inductive). Do not exceed these ratings.
4.3. Reassemble
- Once wiring is complete and verified, carefully replace the front cover onto the thermostat base.
- Restore power to the heating system at the consumer unit/fuse box.
Figure 1: Honeywell MT200 T4360A1009 Frost Protection Room Thermostat with rotary dial and protective cover.
5. Operation
The Honeywell MT200 T4360A1009 thermostat features a simple rotary dial for setting the desired temperature. The primary function is frost protection, ensuring your system does not freeze.
5.1. Setting the Temperature
- Locate the rotary dial on the front of the thermostat.
- Rotate the dial to align the desired temperature setting with the indicator mark. The temperature range for this thermostat is typically 0°C to 20°C.
- For frost protection, set the dial to a low temperature, typically around 5°C to 7°C, to prevent freezing without excessive heating.
- The thermostat will automatically switch the connected heating device (boiler or pump) on or off to maintain the set temperature.
The protective cover helps prevent accidental changes to the temperature setting once it has been established.
6. Maintenance
The Honeywell MT200 T4360A1009 thermostat is designed for reliable, long-term operation with minimal maintenance.
6.1. Cleaning
- To clean the exterior of the thermostat, wipe it with a soft, damp cloth.
- Do not use abrasive cleaners, solvents, or chemical sprays, as these can damage the plastic casing and internal components.
- Ensure no liquid enters the thermostat housing.
6.2. General Care
- There are no user-serviceable parts inside the thermostat. Do not attempt to open or repair the unit yourself.
- Ensure the thermostat is not obstructed by furniture or curtains, which could affect its ability to sense room temperature accurately.
7. Troubleshooting
If you experience issues with your Honeywell MT200 T4360A1009 thermostat, please consult the following common problems and solutions before contacting support.
| Problem | Possible Cause | Solution |
|---|---|---|
| Thermostat not switching heating on/off | No power to the unit; Incorrect wiring; Set temperature not reached. | Check main power supply; Verify wiring connections (consult a qualified electrician); Adjust set temperature to be above/below current room temperature to test. |
| Inaccurate temperature sensing | Thermostat location affected by drafts, direct sunlight, or heat sources. | Relocate the thermostat to a more suitable position away from external influences. |
| Protective cover difficult to remove/replace | Improper alignment or debris. | Ensure proper alignment of the cover with the base; Clean any debris from the edges. |
If the problem persists after attempting these solutions, please contact Honeywell customer support or a qualified heating engineer.
8. Specifications
| Feature | Detail |
|---|---|
| Brand | Honeywell |
| Model Number | T4360A1009 |
| Product Name | MT200 Frost Protection Room Thermostat |
| Power Source | Corded Electric |
| Temperature Control Type | Manual (Rotary Dial) |
| Operating Temperature Range | 0°C to 20°C |
| Maximum Electrical Load (Resistive) | 10 A |
| Maximum Electrical Load (Inductive) | 3 A |
| Batteries Required | No |
| Color | White |
9. Warranty and Support
Honeywell products are manufactured to high standards and are backed by a manufacturer's warranty. For specific warranty terms and conditions, please refer to the documentation included with your purchase or visit the official Honeywell website.
For technical support, troubleshooting assistance beyond what is provided in this manual, or to inquire about replacement parts, please contact Honeywell customer service. Contact details can typically be found on the Honeywell website or on your product packaging.
When contacting support, please have your product model number (T4360A1009) and purchase date readily available.
