The Worcester 28i Greenstar Junior is a wall-mounted, gas-fired condensing combination boiler designed for central heating and mains-fed domestic hot water systems. It operates on natural gas (GC number 47-311-87) and can be converted to LPG, offering versatility for various installations. Part of Worcester Bosch’s renowned Greenstar series, this boiler is known for its energy efficiency, compact design, and eco-friendly performance, making it a popular choice for homes seeking reliable and sustainable heating solutions.
1.1 Overview of the Boiler
The Worcester 28i Greenstar Junior is a wall-mounted, gas-fired condensing combination boiler designed for central heating and mains-fed domestic hot water systems. It operates on natural gas (GC number 47-311-87) and can be converted to LPG, offering flexibility for different installations. As part of the Greenstar series, this boiler is renowned for its energy efficiency, compact design, and eco-friendly performance, making it a reliable and sustainable heating solution for various homes.
1.2 Key Features and Benefits
The Worcester 28i Greenstar Junior offers exceptional energy efficiency, compact design, and user-friendly controls. It provides reliable heating and hot water while minimizing energy consumption. The boiler features a high-efficiency condensing system, reducing emissions and operating costs. Its compact size allows for flexible installation, and the intuitive interface makes it easy to operate. Additionally, it comes with a comprehensive warranty, ensuring long-term peace of mind and protection for homeowners.
Technical Specifications
The Worcester 28i Greenstar Junior is a wall-mounted, gas-fired condensing combination boiler, compatible with natural gas and LPG, featuring an energy-efficient design and compact installation options.
2.1 Boiler Overview
The Worcester 28i Greenstar Junior is a wall-mounted, gas-fired condensing combination boiler designed for central heating and mains-fed domestic hot water systems. It operates on Natural Gas (GC number 47-311-87) and is convertible to LPG, offering flexibility for different installation needs. With a compact design and high energy efficiency, this boiler is ideal for small to medium-sized homes, providing reliable and consistent heating performance while minimizing environmental impact.
2.2 GC Numbers and Compatibility
The Worcester 28i Greenstar Junior boiler has GC numbers 47-311-87 for Natural Gas and 47-311-91 for LPG configurations, ensuring compliance with safety and emissions standards. Designed for use with Natural Gas (Cat II 2H3P TYPE C12 & C32) and compatible with LPG, this boiler offers flexibility for various installation scenarios while maintaining high efficiency and performance across different fuel types and central heating systems.
2.3 Natural Gas and LPG Specifications
The Worcester 28i Greenstar Junior supports both Natural Gas and LPG, with specific configurations for each fuel type. For Natural Gas, the boiler operates at a nominal heat input of 28 kW, while LPG systems are tailored for efficiency and reliability. The appliance is designed to meet Category II (2H3P) standards, ensuring safe and efficient combustion. The gas inlet pressure for Natural Gas is set at 20 mbar, and for LPG, it is 37 mbar, maintaining optimal performance across fuel types.
Installation and Commissioning
The Worcester 28i Greenstar Junior installation requires pre-installation checks, proper gas supply connections, and system setup. Commissioning ensures the boiler operates efficiently and safely, adhering to manufacturer guidelines and safety standards.
3.1 Pre-Installation Checks
Before installing the Worcester 28i Greenstar Junior, ensure the gas supply matches the boiler’s specifications, either Natural Gas (GC number 47-311-87) or LPG (GC number 47-311-91). Verify the electrical connections are compatible and the flue system is correctly sized. Check for proper ventilation in the installation area and ensure the boiler’s placement adheres to safety guidelines. Conduct a system flush to remove debris and ensure the heating system is compatible with the boiler’s operating parameters for optimal performance.
3.2 Step-by-Step Installation Guide
- Mounting the Boiler: Secure the boiler on a suitable wall using the provided mounting bracket, ensuring it is level and accessible.
- Gas and Water Connections: Connect the gas supply line and water pipes according to the boiler’s specifications and local regulations.
- Flue Installation: Install the flue system correctly, ensuring it meets ventilation requirements and complies with safety standards.
- Electrical Connections: Connect the boiler to a power supply and ensure all wiring is done by a qualified professional.
- System Compatibility Check: Verify that the heating system and controls are compatible with the boiler’s operating parameters.
- Final Testing: Perform a thorough test of the boiler’s operation to ensure proper function and safety before handing over to the user.
3.3 Commissioning Process
The commissioning process involves ensuring the boiler operates safely and efficiently. Begin by checking the system pressure and topping up if necessary. Test the gas valve by running a heating cycle. Verify flue integrity and ensure proper ventilation. Check for leaks in all connections. Finally, test the boiler’s performance under various loads to confirm correct operation. Record all findings for future reference and ensure compliance with safety standards.
Maintenance and Servicing
Regular maintenance ensures optimal performance and longevity. Annual servicing by a qualified engineer is essential, alongside checking system pressure, bleeding radiators, and cleaning the condensate trap for efficiency.
4.1 Scheduled Maintenance Requirements
Regular maintenance is crucial for optimal performance. Annual servicing by a qualified engineer is essential to ensure efficiency and safety. Key tasks include checking system pressure, cleaning the condensate trap, and inspecting components for wear. Additionally, ensuring proper water treatment and checking for gas leaks helps maintain boiler efficiency and prevent potential issues. These steps are vital for prolonging the boiler’s lifespan and ensuring reliable operation throughout the year.
4.2 Servicing Instructions
Servicing should be performed by a qualified engineer annually. Key steps include inspecting the heat exchanger, cleaning or replacing the filter, checking the combustion chamber, and verifying gas pressure. Additionally, the condensate trap should be emptied, and electrical connections must be tested for integrity. Any worn or damaged components, such as seals or gaskets, should be replaced. Proper servicing ensures optimal performance, efficiency, and safety, aligning with manufacturer guidelines and warranty requirements.
4.3 Tips for Optimal Performance
To maintain the Worcester 28i Greenstar Junior’s efficiency, ensure annual servicing by a qualified engineer. Regularly check and top up boiler pressure to 1 bar, and bleed radiators to remove airlocks. Clean the condensate trap and ensure proper ventilation in the installation area. Using a system filter, like the Greenstar System Filter, can prevent debris from affecting performance. Always follow the manufacturer’s guidelines for optimal operation and longevity of the boiler.
Troubleshooting Common Issues
Common issues with the Worcester 28i Greenstar Junior include error codes, low boiler pressure, and condensate pipe freezing. Resetting the boiler or checking components often resolves these problems.
5.1 Identifying Common Faults
The Worcester 28i Greenstar Junior may display error codes like E1, E2, or E5, indicating issues such as low water pressure, faulty sensors, or ignition problems. Other common faults include condensate pipe blockages, radiator leaks, or faulty diverter valves. Users should check the boiler’s digital display for specific error codes, as these provide clues for diagnosing the issue. Regular maintenance can help prevent many of these faults, ensuring optimal performance and reliability.
5.2 Diagnostic Procedures
Diagnosing faults on the Worcester 28i Greenstar Junior involves checking the boiler’s digital display for error codes, such as E1 (low water pressure) or E5 (ignition failure). Technicians should inspect components like the gas valve, sensors, and condensate pipe for blockages or damage. Ensuring proper system setup, including water pressure and gas supply, is crucial. Regular servicing, as outlined in the manual, helps identify potential issues before they escalate, ensuring reliable operation and energy efficiency. Always consult the user manual for specific troubleshooting guidance.
5.3 Resetting the Boiler
To reset the Worcester 28i Greenstar Junior, press and hold the reset button located on the control panel for 3-5 seconds until the red fault light extinguishes. This action restarts the boiler and clears minor faults. Ensure the system is cold before resetting. If the issue persists after resetting, refer to the error code on the display or consult the manual for further troubleshooting. Resetting does not fix underlying issues, so professional servicing may be required if problems recur frequently.
User Instructions for Operation
To operate the Worcester 28i Greenstar Junior, turn on the boiler, set desired temperatures via the controls, and ensure all settings are configured for optimal performance.
6.1 Daily Operation Guide
Ensure the boiler is turned on and set the desired temperature using the controls. Check the pressure gauge regularly and top up if necessary. Always maintain proper ventilation in the room. Use the programmer or thermostat to regulate heating times and temperatures efficiently. Avoid extreme temperature settings to conserve energy. Regularly inspect the boiler’s display for error codes and ensure all components are functioning correctly for optimal performance and safety.
6.2 Adjusting Settings
To adjust settings on the Worcester 28i Greenstar Junior, use the control panel to modify temperature, timer, and heating modes. Adjust the CH (central heating) and DHW (domestic hot water) temperatures using the dials or digital interface. Ensure the boiler is set to “CH” or “DHW” mode as needed. For energy efficiency, lower the temperature when demand is low. Always refer to the manual for precise instructions to avoid incorrect settings and maintain optimal performance.
6.3 Environmental Benefits
The Worcester 28i Greenstar Junior is a highly efficient condensing boiler, achieving significant energy savings and reducing carbon emissions. Its eco-friendly design incorporates advanced heat recovery technology, ensuring minimal waste of valuable energy resources. By using natural gas or LPG efficiently, this boiler contributes to a more sustainable heating solution for homes, aligning with environmental goals and promoting energy-conscious living while maintaining reliable performance.
Warranty and Customer Support
The Worcester 28i Greenstar Junior comes with a comprehensive warranty when installed by an accredited installer. For customer support, contact Worcester Bosch at 08705 266241 (technical) or 08457 256206 (service). Visit www.worcester-bosch.co.uk for additional resources and support.
7.1 Warranty Coverage
The Worcester 28i Greenstar Junior boiler is backed by a comprehensive warranty, typically offering 5-7 years of cover when installed by a Worcester Bosch Accredited Installer. Extended warranties are available with the installation of a Greenstar System Filter. The boiler must be serviced annually and registered within 30 days of installation to maintain warranty validity. Terms and conditions apply; visit www.worcester-bosch.co.uk for full details.
7.2 Contact Information
For any inquiries or support regarding the Worcester 28i Greenstar Junior, contact Worcester Bosch directly. Their technical support team can be reached at 08705 266241, while service-related queries are handled at 08457 256206. For literature or sales inquiries, call 01905 752556 or visit their official website at www.worcester-bosch.co.uk for additional resources and contact forms.
7.3 Additional Resources
For further assistance, Worcester Bosch provides comprehensive resources online. Downloadable manuals, including installation, servicing, and user guides, are available on their official website. Additionally, FAQs, troubleshooting tips, and technical specifications can be accessed to support optimal boiler performance and maintenance. Visit www.worcester-bosch.co.uk for a detailed library of resources tailored to the Worcester 28i Greenstar Junior.
The Worcester 28i Greenstar Junior offers a reliable, efficient, and eco-friendly heating solution. Regular maintenance and adherence to the manual ensure optimal performance and longevity of the boiler.
8;1 Summary of Key Points
The Worcester 28i Greenstar Junior is a high-efficiency, condensing combination boiler designed for central heating and hot water. With a compact design, it suits various home sizes. Compatible with natural gas (GC number 47-311-87) and LPG, it offers flexibility. The boiler requires proper installation and annual servicing for optimal performance. Its eco-friendly design reduces energy consumption. Users should follow the manual for maintenance and troubleshooting to ensure longevity and reliability.
8.2 Final Tips for Users
Regularly servicing your Worcester 28i Greenstar Junior ensures optimal performance and extends its lifespan. Always follow the manual for maintenance and troubleshooting. Check boiler pressure annually and bleed radiators if necessary. Use compatible Worcester Bosch parts for repairs. Consider installing a system filter to enhance efficiency. Familiarize yourself with the controls to adjust settings for energy savings. Keep the area around the boiler clear for proper ventilation and safety. Ensure annual inspections by a qualified engineer to maintain warranty validity.
