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General| Model | Flexicom 18sx |
|---|---|
| Category | Boiler |
| Mounting | Wall Mounted |
| Output | 18 kW |
| Fuel Type | Natural Gas |
| ErP Heating Efficiency Class | A |
| Central Heating Max Pressure | 3 bar |
| Flue Options | Horizontal or vertical |
Critical safety advice on gas leaks, handling metal parts, and sealed components.
Adherence to British/Irish standards and building regulations for installation.
System design, frost protection, condensate safety, electrical failure, overheat, and discharge valve safety.
Managing flow rates, bypass operation, and sealed system filling.
Connecting gas and water systems to the boiler, including pipework and isolation valves.
Detailed instructions for lifting and securely mounting the boiler onto the wall bracket.
Step-by-step guide for assembling and fitting telescopic flue components.
Step-by-step guide for assembling and fitting standard flue components.
Methods for securing the direct rear telescopic flue assembly.
Completing vertical flue installation, including cutting and securing the terminal.
Steps for wiring, routing cables, and connecting to system controls.
Specific wiring instructions for 24V and mains voltage system controls.
Securing the electrical cartridge and performing preliminary electrical system checks.
Steps for flushing the heating circuit and checking gas tightness before filling.
Procedures for filling the heating system and boiler to the correct pressure.
Verifying gas inlet pressure and measuring gas rate.
Automated boiler lighting process and checks for external controls.
Final steps, required documentation, and user guidance on operation and safety.
Key points for safe servicing, legal requirements, and a general inspection checklist.
Requirements for personnel and equipment, and the procedure for combustion performance checks.
Procedure to check and adjust the boiler's maximum gas rate CO2 setting.
Procedure to check and adjust the boiler's minimum gas rate CO2 setting.
Final checks of CO2 and CO/CO2 ratio after adjustments.
Initial diagnostic steps before specific fault code analysis.
Accessing fault codes, memory, and the diagnostic menu for troubleshooting.
Graphical guide for troubleshooting central heating operational issues.
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