Contents

General checks before calling a Service engineer
- User instructions & customer care guide
- Abbreviations
- Dedicated to heating comfort
- Contents
- 1 Key to symbols and safety instructions
  - 1.1 Key to symbols
    - Warnings
    - Important information
    - Additional 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
      - To access controls:
    - 3.2 Operating the boiler
      - 3.2.1 Switching the boiler on/off
      - 3.2.2 Setting central heating temperature
      - 3.2.3 Controlling the central heating
        
        Turning the central heating off during the summer
      - 3.2.4 Setting the hot water temperature
      - 3.2.5 Domestic hot water (DHW)
      - 3.2.6 Eco mode
        
        Domestic hot water eco mode
        
        Selecting eco mode
        
        Exit eco mode
      - 3.2.7 Frost protection
      - 3.2.8 System pressure
        
        Filling loop
  - 4 Maintenance
    - 4.1 Troubleshooting
      - Boiler alert state
      - Boiler reset
      - Boiler stops with no fault code
      - 4.2 Servicing
    - 4.3 Fault finding
    - 4.4 Maintaining your boiler
      - Maintenance tips
      - Use in hard water areas
  - 5 General information
    - 5.1 Important information
      - Fuel
      - Boiler location
      - Installation & servicing clearances
    - 5.2 General notes
      - Central heating systems
      - Condensate drain
      - Clearances - Service
      - Room thermostat
      - Thermostatic radiator valves
  - 6 Energy saving
    - 6.1 Tips on energy saving
      - Room thermostats
      - New control systems
      - Radiators
      - Heating economically
      - Roof insulation
      - Window frames
      - Curtains
      - Draughts
  - 7 Guarantee
    - 7.1 Fault or breakdown
      - Boiler data label
    - 7.2 Guarantee registration
    - 7.3 Your guarantee
      - Guarantee registration

Worcester Greenstar Heatslave 2 External 12/18 2018 User Instructions

Worcester Greenstar Heatslave 2 External 12/18 2018 Boiler manual cover

Pages 20

Year 2018

Language(s)

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Worcester Greenstar Heatslave 2 External 12/18 2018 Boiler Specification

The Worcester Greenstar Heatslave 2 External 12/18 2018 Boiler is a highly efficient oil-fired combi boiler designed for outdoor installation, catering to both heating and hot water demands. It is suitable for small to medium-sized homes with one bathroom. The boiler operates with a central heating output ranging between 12 kW to 18 kW, ensuring optimal energy efficiency and performance. It features a robust, weatherproof external casing designed to withstand diverse weather conditions, maintaining reliability and longevity. This model is equipped with a high-efficiency primary heat exchanger and incorporates the latest in Worcester Bosch technology to deliver an A-rated efficiency, which can contribute to reduced energy bills and lower carbon emissions. The boiler also includes a user-friendly digital display for easy monitoring and control, alongside compatibility with smart control systems for enhanced convenience and comfort. Its compact design allows for flexible placement outside the home, freeing up indoor space. Additionally, it is engineered with an in-built frost protection feature, safeguarding the system during colder months. The Worcester Greenstar Heatslave 2 External 12/18 is endorsed by the Energy Saving Trust, highlighting its capability to provide both reliable performance and sustainable energy use. Maintenance is simplified with accessible service components, ensuring ease of servicing and repair. This model is a part of Worcester Bosch’s commitment to high quality and innovation in home heating solutions.

Worcester Greenstar Heatslave 2 External 12/18 2018 Boiler F.A.Q.

How do I reset the Worcester Greenstar Heatslave 2 External 12/18 boiler?

To reset the boiler, press the reset button located on the front control panel. Hold it for a few seconds until the reset indicator light turns off.

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

Check the thermostat settings and ensure the boiler is set to the desired temperature. Also, verify that there are no obstructions in the flue or air vents. If the problem persists, consult a professional technician.

How often should I service my Worcester Greenstar Heatslave 2 External 12/18 boiler?

It is recommended to have the boiler serviced annually by a qualified engineer to ensure optimal performance and safety.

What does the error code EA mean on my boiler?

Error code EA indicates a failure to ignite. Check if the gas supply is on and that there are no airlocks in the system. If the issue remains unresolved, contact a professional engineer.

Can I use external controls with the Worcester Greenstar Heatslave 2 External 12/18 boiler?

Yes, external controls such as thermostats and timers can be integrated with the boiler to enhance convenience and efficiency. Ensure compatibility before installation.

How do I check the pressure on the Worcester Greenstar Heatslave 2 External 12/18 boiler?

The pressure gauge should read between 1 and 1.5 bar when the system is cold. If the pressure is too low, top up the system using the filling loop until the correct pressure is reached.

Why is my boiler making unusual noises?

Unusual noises may be due to trapped air, scale build-up, or a faulty pump. Bleeding the radiators or consulting a heating engineer may resolve the issue.

What fuel types can the Worcester Greenstar Heatslave 2 External 12/18 boiler use?

This boiler is designed to use oil as its primary fuel source. Ensure the oil meets the manufacturer’s specifications for optimal performance.

How do I improve the efficiency of my Worcester Greenstar Heatslave 2 External 12/18 boiler?

Regular maintenance, using a programmable thermostat, insulating hot water pipes, and ensuring the system is balanced can help improve efficiency.

What should I do if the boiler’s external casing is damaged?

If the casing is damaged, it is crucial to have it repaired or replaced by a qualified technician to ensure the boiler is weatherproof and operating safely.