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Kenneth MorrisSep 5, 2025
What to do if Baxi LUNA DUO-TEC+ input voltage is too low?
- AAnthony DavisSep 5, 2025
If your Baxi Boiler displays 'Input voltage too low' (V
To Next PageTo Next PageWhat to do if Baxi LUNA DUO-TEC+ input voltage is too low?
If your Baxi Boiler displays 'Input voltage too low' (V
How to fix Gas valve connection error on Baxi LUNA DUO-TEC+ Boiler?
If your Baxi Boiler displays a 'Gas valve connection error', check the connections between the gas valve and the electronic board.
What causes fumes fault during calibration in Baxi LUNA DUO-TEC+ Boiler?
If your Baxi Boiler displays 'Fumes fault during calibration (probable fumes recirculation)', check for any recirculation of fumes. Activate the automatic calibration function.
What to do if the fumes outlet is obstructed on my Baxi Boiler?
If your Baxi Boiler has fumes outlet obstructed, check that the drainage pipe is free from obstructions. Switch off the electric power supply to the boiler for a few seconds.
How to troubleshoot fault in system filling phase in Baxi LUNA DUO-TEC+?
If your Baxi Boiler displays 'Fault in system filling phase', check the filling tap.
What does 'Hydraulic circuit automatic filling in progress' mean on Baxi LUNA DUO-TEC+?
If your Baxi Boiler displays 'Hydraulic circuit automatic filling in progress', wait for the end of the filling cycle.
General| Model | LUNA DUO-TEC+ |
|---|---|
| Category | Boiler |
| Modulation Range | 1:7 |
| Installation | Wall-mounted |
| ErP Rating Heating | A |
| ErP Rating DHW | A |
| NOx Class | 5 |
| Fuel Type | Natural Gas |
| Warranty | 5 years |
| Type | Condensing Combi Boiler |
| Output Range | 24 kW to 33 kW |
Explains symbols for general warning, burns, high voltage, and freezing hazards.
Explains symbols for important information and generic prohibitions.
Actions for gas smell: switch off, ventilate, contact service.
Actions for combustion fumes: switch off, ventilate, contact service.
Caution against storing flammable materials near the boiler.
Critical instruction to power off boiler before maintenance or cleaning.
Steps for preparing domestic hot water and heating circuits before boiler installation.
Mandate for initial boiler startup by an authorized service engineer.
Advice on setting heating temperatures and using controls for energy efficiency.
Guidance on DHW temperature setting to reduce energy and scale.
Step-by-step guide for the first-time boiler startup.
How to set Central Heating (CH) and Domestic Hot Water (DHW) flow temperatures.
Guide to choosing between DHW, Heating, or DHW & Heating modes.
Recommendations for system protection during winter or prolonged shutdowns.
Explanation of the built-in automatic antifreeze protection for the heating system.
Requirement for professional conversion between natural gas and LPG.
How error codes are displayed and what they signify.
Instructions for users to reset specific faults using the control panel.
Method to access and view internal boiler data and parameters.
Steps to safely turn off the boiler while maintaining anti-freeze protection.
Guide to filling the heating system, checking pressure, and venting air.
Importance and recommendation for annual maintenance by authorized service centers.
Essential instructions and considerations for installers before commencing work.
Guidance on boiler placement, fixing, and connecting water and gas lines.
Details of items supplied with the boiler and connection point identification.
Instructions for installing coaxial air and flue ducts, including bends and lengths.
Guidance for installing separate air and flue ducts using an accessory kit.
Requirements for safe electrical installation, including earthing and power supply.
Details for connecting power, room thermostat, and other basic controls to M1.
Wiring specifications for accessories like remote control, probes, and storage boiler sensors on M2.
Specific steps to wire a room thermostat to the boiler's terminal block.
How to connect and configure an external sensor for climate curve control.
Guidance for connecting external storage boilers and zone heating systems.
Detailed procedure for the first startup, including gas type analysis.
How to use the function to remove air from the heating circuit.
Explanation of the function to run the boiler at maximum power for maintenance.
How to perform a combustion test and expected CO2/O2 values.
Guide to adjusting CO2 levels for optimal combustion efficiency.
Information on the gas valve and the process for gas conversion.
Steps to access, view, and modify boiler parameters.
Overview of essential parameters for initial setup and basic configuration.
Description of advanced parameters for fine-tuning boiler operation.
How to adjust parameter P13 to limit maximum heating output.
Table mapping P13 values to specific kW heating outputs for boiler models.
Details of safety devices like limit thermostat, pressure switch, and flame sensor.
Explanation of pump post-circulation, antifreeze, and anti-block features.
Information on pump flow rate and head characteristics for system matching.
Key checks and controls for annual servicing to ensure efficiency and safety.
Procedure for cleaning the cold water filter within the hydraulic unit.
Correct placement of ignition and flame sensing electrodes for reliable operation.
List of components that necessitate an automatic calibration after replacement.
Step-by-step guide to perform the automatic calibration function after component changes.
Safety measures and requirements for dismantling the appliance by qualified personnel.
Information on the correct and environmentally responsible disposal of the boiler.
Comprehensive table of technical specifications for each boiler model.
Detailed performance metrics including efficiency, pressure limits, and water flow rates.
Information on gas consumption, power requirements, and emissions like NOx.
Classification of the boiler's seasonal space heating and water heating energy efficiency.
Data on electrical power consumption in various operating states.
Specific percentage values for seasonal space heating and water heating energy efficiency.
Overview of the boiler's applications for space heating and domestic hot water.
Summary of energy efficiency classes and annual energy consumption figures.
Information on the sound power level and annual fuel consumption.
