Contents

Preface
Contents
1 Key to symbols and safety instructions
- 1.1 Key to symbols
- 1.2 Safety instructions
- 2 General Information
  - 2.1 Energy efficiency
  - 2.2 Servicing
  - 2.3 User caution
- 3 Using your boiler
  - 3.1 Controls
  - 3.2 Operating the boiler
    - 3.2.1 Switching the boiler on/off
    - 3.2.2 Setting the heating temperature
    - 3.2.3 Controlling the central heating
    - 3.2.4 Frost protection
- 4 Maintenance
  - 4.1 Maintaining your boiler
  - 4.2 Servicing
- 5 External filling loop (sealed system only)
- 6 General information
  - 6.1 Fuel
  - 6.2 Boiler installation
  - 6.3 General notes
- 7 Fault finding
  - 7.1 Fault conditions
- 8 Fault or breakdown
- 9 Energy saving
  - 9.1 Tips on energy saving
- 10 Your guarantee
- 11 Environment/disposal

Worcester External System 12/18 2018 User Instructions

Worcester External System 12/18 2018 Boiler manual cover

Pages 16

Year 2018

Language(s)

of 16

Worcester External System 12/18 2018 Boiler Specification

The Worcester External System 12/18 2018 Boiler is a high-efficiency heating solution designed for residential use, particularly suitable for outdoor installation to save indoor space. This boiler features a robust and weather-resistant casing, ensuring reliable performance even in harsh environmental conditions. It operates within an output range of 12 to 18 kW, making it ideal for medium-sized homes with consistent heating and hot water demands.

The boiler's system setup is geared towards integrating seamlessly with existing heating systems, offering compatibility with a variety of controls and thermostats for enhanced efficiency and user convenience. It utilizes a condensing technology to maximize energy conversion and reduce waste, achieving an A-rated energy efficiency classification. This ensures lower fuel consumption and reduced carbon emissions, aligning with modern sustainability standards.

The Worcester External System 12/18 2018 Boiler is equipped with advanced diagnostics and safety features, including frost protection and a built-in expansion vessel, which contribute to its reliability and ease of maintenance. Its user-friendly interface allows for straightforward operation, while its compact design facilitates unobtrusive outdoor installation. The boiler is designed to comply with the latest industry standards and regulations, ensuring top-tier safety and performance.

Overall, the Worcester External System 12/18 2018 Boiler represents a blend of innovative technology and practical design, providing a durable, efficient, and environmentally friendly heating solution for homes that require an external heating system.

Worcester External System 12/18 2018 Boiler F.A.Q.

How do I reset the Worcester External System 12/18 Boiler?

To reset the Worcester External System 12/18 Boiler, locate the reset button on the control panel. Press and hold it for about 3 seconds until the reset light goes off. This should restore the boiler to its default settings.

What should I do if my Worcester boiler is not heating water?

First, check the thermostat settings and ensure it is set to the desired temperature. Next, verify that the boiler is powered on and inspect the main control panel for any error codes. If the issue persists, it might be necessary to contact a certified technician.

How often should I service my Worcester External System 12/18 Boiler?

It is recommended to service your Worcester External System 12/18 Boiler annually. Regular maintenance ensures efficiency, safety, and prolongs the lifespan of the boiler.

What does the error code EA mean on my Worcester boiler?

Error code EA on a Worcester boiler typically indicates an ignition failure. Check if the gas supply is on and that there is a sufficient pressure, then attempt to reset the boiler. If the error persists, contact a professional technician.

Can I use chemical inhibitors in my Worcester External System 12/18 Boiler?

Yes, chemical inhibitors can be used in the Worcester External System 12/18 Boiler to prevent corrosion and limescale build-up. Ensure that you use inhibitors specifically designed for central heating systems and follow the manufacturer's instructions.

How do I increase the pressure in my Worcester boiler?

To increase the pressure in your Worcester boiler, locate the filling loop, usually found beneath the boiler. Open the valves on the filling loop and monitor the pressure gauge. Once the desired pressure is reached, close the valves to stop the water flow.

What should I do if my Worcester boiler is leaking water?

If your Worcester boiler is leaking, turn off the water supply and power to the unit. Inspect visible pipes and joints for any signs of damage. It is crucial to contact a qualified technician to identify and repair the source of the leak.

How do I bleed the radiators with a Worcester External System 12/18 Boiler?

Turn off the boiler and allow it to cool. Use a radiator key to open the bleed valve on each radiator. Let the air escape until water begins to drip, then close the valve. Check and re-pressurize the boiler if necessary.

Why is my Worcester boiler making unusual noises?

Unusual noises could be due to trapped air, low water pressure, or limescale build-up. Bleed the radiators to remove air and check the pressure gauge. If the noise persists, consider contacting a technician for further inspection.

How can I improve the energy efficiency of my Worcester External System 12/18 Boiler?

To improve energy efficiency, ensure regular servicing, use programmable thermostats, and insulate pipes. Additionally, check for and seal any drafts in your home to maintain consistent indoor temperatures.