THERMOR LOGIC MICRO 24 Natural Gas Condensing Boiler

1. Introduction

This manual provides essential information for the safe and efficient operation of your THERMOR LOGIC MICRO 24 Natural Gas Condensing Boiler. The Logic Micro is an ultra-compact and versatile condensing boiler designed for both new installations and replacements, fitting into various spaces. It features maximum component reliability, a stainless steel plate heat exchanger for domestic hot water, energy-saving condensation technology, and a high-efficiency pump. For enhanced comfort, it includes a PREHEAT function and operates quietly. Please read this manual thoroughly before installation, operation, or maintenance.

2. Safety Information

Always adhere to the following safety guidelines to prevent injury, damage, or improper operation of the boiler.

• Professional Installation: Installation, maintenance, and repair must only be performed by qualified and certified technicians in accordance with local and national regulations.
• Gas Safety: Ensure proper ventilation. If you smell gas, immediately shut off the gas supply, open windows, and contact emergency services. Do not operate electrical switches.
• Electrical Safety: Ensure the boiler is properly grounded. Do not touch electrical components with wet hands. Disconnect power before any service or maintenance.
• Water Pressure: Regularly check the system pressure. Refer to the pressure gauge on the boiler.
• Flammable Materials: Do not store flammable materials near the boiler.
• Children and Pets: Keep children and pets away from the boiler during operation.

3. Setup and Installation

The THERMOR LOGIC MICRO 24 boiler must be installed by a qualified professional. This section provides a general overview of the installation process.

3.1. Site Selection

Choose a suitable location for wall mounting, ensuring adequate space for ventilation, maintenance, and access to controls. The boiler dimensions are crucial for planning.

Image 3.1: Dimensions of the THERMOR LOGIC MICRO 24 boiler. This image illustrates the height and width of the boiler, along with the depth including the flue connection, essential for installation planning and ensuring proper clearances.

3.2. Mounting and Connections

1. Wall Mounting: Securely mount the boiler to a load-bearing wall using appropriate fixings.
2. Gas Connection: Connect the boiler to the natural gas supply line. Ensure all connections are gas-tight and tested for leaks.
3. Water Connections: Connect the heating flow and return pipes, and the domestic hot water inlet and outlet pipes. Install isolation valves.
4. Flue System: Install the flue system according to manufacturer instructions and local regulations for safe exhaust gas discharge.
5. Electrical Connection: Connect the boiler to the electrical supply, ensuring proper grounding and circuit protection.
6. Condensate Drain: Connect the condensate drain to an appropriate waste system.

3.3. Initial Checks

• Fill the heating system with water and vent air from the radiators.
• Check system pressure on the boiler's pressure gauge.
• Verify all connections for leaks (gas, water, flue, condensate).
• Ensure proper electrical supply and grounding.

Image 3.2: Front view of the THERMOR LOGIC MICRO 24 boiler. This image displays the control panel, pressure gauge, and overall design of the unit, which is important for understanding its components during installation and operation.

4. Operating Instructions

This section describes the basic operation of your THERMOR LOGIC MICRO 24 boiler.

4.1. Control Panel Overview

The boiler features a user-friendly control panel with a digital display and rotary knobs for adjusting settings. Refer to Image 3.2 for a visual reference of the control panel.

• Digital Display: Shows current temperature, operating status, and error codes.
• Heating Temperature Knob: Adjusts the desired temperature for the central heating system.
• Domestic Hot Water (DHW) Temperature Knob: Adjusts the desired temperature for domestic hot water.
• Mode Selector: Allows switching between heating only, DHW only, or combined modes.
• ECO/RESET Button: Activates ECO mode for energy saving or resets the boiler after an error.
• Pressure Gauge: Indicates the system water pressure.

4.2. Powering On/Off

• To Power On: Ensure the electrical supply is connected and the gas valve is open. The boiler will typically perform a self-check.
• To Power Off: Turn the mode selector to the "Off" position or disconnect the electrical supply. For extended periods of inactivity, also close the gas valve.

4.3. Adjusting Temperatures

• Central Heating: Use the heating temperature knob to set your desired room temperature or radiator flow temperature.
• Domestic Hot Water: Use the DHW temperature knob to set the desired hot water temperature.

4.4. PREHEAT Function

The PREHEAT function ensures that domestic hot water is available quickly by keeping a small amount of water pre-heated. Consult your installer or the full technical manual for details on activating and configuring this feature.

5. Maintenance

Regular maintenance is crucial for the longevity, efficiency, and safe operation of your boiler. Always ensure the boiler is powered off and isolated before performing any maintenance.

5.1. Annual Service

It is mandatory to have your boiler serviced annually by a qualified and certified heating engineer. This service includes:

• Checking and cleaning the heat exchanger.
• Inspecting the burner and ignition system.
• Verifying gas pressure and combustion efficiency.
• Checking all safety devices.
• Inspecting the flue system for blockages or leaks.
• Checking the expansion vessel and system pressure.

5.2. User Checks

• System Pressure: Regularly check the pressure gauge. The ideal pressure is typically between 1.0 and 1.5 bar when the system is cold. If the pressure drops significantly, consult your installer or a qualified technician.
• Visual Inspection: Periodically check the boiler for any visible signs of leaks, damage, or unusual noises.
• Cleaning: Clean the exterior casing of the boiler with a soft, damp cloth. Do not use abrasive cleaners or solvents.
• Frost Protection: If the boiler is installed in an unheated area, ensure the frost protection function is active during cold periods.

6. Troubleshooting

Before contacting a service technician, you can perform some basic checks for common issues.

Important: For any issue not resolved by these basic steps, or if you are unsure, always contact a qualified heating engineer. Do not attempt repairs yourself.

7. Specifications

Key technical specifications for the THERMOR LOGIC MICRO 24 Natural Gas Condensing Boiler:

• Brand: THERMOR
• Model Name: MICRO 24
• Fuel Type: Natural Gas
• Material: Stainless Steel
• Efficiency: High Energy Efficiency
• Control Type: Digital Display and Rotary Controls
• Mounting Type: Wall-mounted
• ASIN: B079VPTTFV
• Features: Ultra-compact design, PREHEAT function, quiet operation.

8. Warranty Information

The THERMOR LOGIC MICRO 24 boiler typically comes with a manufacturer's warranty of up to 2 years from the date of purchase. This warranty covers defects in materials and workmanship under normal use and service.

Please refer to the warranty card provided with your product for specific terms, conditions, exclusions, and details on how to make a claim. Keep your proof of purchase and installation records in a safe place, as they may be required for warranty service.

Note: The warranty may be voided if the boiler is not installed, serviced, or repaired by a qualified professional, or if unauthorized modifications are made.

9. Customer Support

If you require technical assistance, have questions about your boiler, or need to schedule service, please contact your installer or the THERMOR customer support. Ensure you have your boiler's model number (MICRO 24) and serial number ready when contacting support.

For the most up-to-date contact information, please visit the official THERMOR website or refer to the documentation provided with your boiler.