Worcester Greenstar 28i Junior Installation Manual⁚ A Comprehensive Guide
This manual provides installation and servicing instructions for Worcester Greenstar 24i junior/28i junior wall hung gas fired condensing combination boilers. It includes information on safety precautions, regulations, appliance specifications, system requirements, and more.
Introduction
Welcome to the Worcester Greenstar 28i Junior Installation Manual, your comprehensive guide to installing and maintaining this high-performance combi boiler. This manual provides detailed instructions and essential information to ensure a safe and efficient installation process. We understand that installing a new boiler can be a complex task, but with this manual as your companion, you’ll have the knowledge and confidence to complete the installation correctly.
The Worcester Greenstar 28i Junior is a compact and energy-efficient boiler designed to provide both central heating and domestic hot water for your home. It’s ideal for sealed central heating systems and offers a range of features to optimize your comfort and energy savings. This manual will walk you through each step of the installation process, from pre-installation checks to final commissioning. It also includes important safety precautions and maintenance tips to ensure the longevity and optimal performance of your boiler.
We encourage you to read this manual carefully before starting the installation. Following the instructions provided will ensure a successful and trouble-free installation, as well as a long and efficient lifespan for your Worcester Greenstar 28i Junior boiler.
Safety Precautions
Your safety and the safety of those around you are our top priority. This section outlines crucial safety precautions that must be strictly adhered to during the installation and use of the Worcester Greenstar 28i Junior boiler. Failure to follow these instructions may result in serious injury, property damage, or even death.
Before commencing any work on the boiler, ensure that the gas supply has been isolated and the electrical supply disconnected. Always use appropriate safety equipment such as gloves, eye protection, and protective footwear. Never attempt to modify or alter the boiler in any way without consulting a qualified engineer.
If you smell gas, immediately evacuate the premises and contact the National Gas Emergency Service on 0800 111 999. Never attempt to repair or service the boiler yourself unless you are a qualified and competent engineer. Regular servicing by a qualified engineer is crucial for safe and efficient operation of the boiler.
Appliance Information
The Worcester Greenstar 28i Junior is a high-efficiency, wall-hung, gas-fired condensing combination boiler designed for sealed central heating systems and mains-fed domestic hot water. It is suitable for use with natural gas or LPG and offers a compact and stylish design. This boiler is equipped with a range of features that enhance its performance and reliability, including a built-in weather compensation system, a frost protection feature, and a low NOx burner for reduced emissions.
The 28i Junior boasts a maximum rated heat output of 28.57 kW, making it suitable for heating a medium-sized home. Its efficient design ensures optimal energy utilization, resulting in lower energy consumption and reduced heating costs. The boiler is also equipped with a user-friendly control panel that allows you to easily adjust the heating and hot water settings.
The Worcester Greenstar 28i Junior comes with a comprehensive warranty that covers both parts and labor, providing peace of mind for years to come.
Technical Data
The Worcester Greenstar 28i Junior boasts a range of technical specifications that ensure its performance and efficiency. Here are some key technical data points⁚
- Heat Output⁚ The maximum rated heat output for the 28i Junior is 28.57 kW, making it suitable for heating a medium-sized home.
- Fuel Type⁚ The boiler is compatible with both natural gas and LPG, offering flexibility in fuel selection.
- Dimensions⁚ The 28i Junior has a depth of 330mm when fitted to a wall frame, a width of 400mm, and a height of 710mm to the top of the case front.
- Weight⁚ The boiler weighs approximately 30 kg, making it relatively lightweight for installation.
- Water Pressure⁚ The minimum mains water pressure required for optimal performance is 1.3 bar.
- Electrical Supply⁚ The boiler operates on a 230V ─ 50 Hz, 140 Watts supply.
These technical details are essential for proper installation and operation of the Worcester Greenstar 28i Junior boiler.
Pre-Installation
Before commencing the installation of your Worcester Greenstar 28i Junior boiler, it is crucial to carefully review and adhere to the pre-installation requirements outlined in this manual. These steps are designed to ensure a safe and efficient installation process.
Firstly, ensure that the location chosen for the boiler installation is suitable and complies with all relevant building regulations. The boiler should be installed on a fixed, rigid surface that can support its weight.
Next, verify that the electrical supply is compatible with the boiler’s requirements. The boiler requires a 230V ー 50 Hz, 140 Watts supply.
Additionally, confirm the water supply meets the minimum pressure requirement of 1.3 bar. This ensures the boiler operates efficiently and provides adequate hot water.
Lastly, make sure the chosen location for the boiler allows for sufficient clearances for servicing and maintenance. Refer to the specific clearance requirements detailed in the manual for your particular boiler model.
Mains Supply
The Worcester Greenstar 28i Junior boiler requires a reliable electrical supply for its operation. This section details the necessary specifications and considerations for the mains supply.
The boiler operates on a standard 230V ─ 50 Hz supply and consumes 140 Watts of power. Ensure the electrical circuit is appropriately sized to accommodate the boiler’s power draw, as overloading can lead to malfunctions or even safety hazards.
The wiring to the boiler must be PVC insulated with a cross-sectional area of 0.75 mm (24 x 0.2 mm). It is recommended to use a qualified electrician to ensure the wiring is installed correctly and safely.
Additionally, a dedicated circuit breaker should be installed to provide isolation for the boiler’s electrical supply. This allows for easy disconnection of the boiler during servicing or maintenance.
Water Systems and Pipe Work
The Worcester Greenstar 28i Junior is designed for use with sealed central heating systems, requiring careful consideration of the water system and pipe work. This section outlines important guidelines for ensuring compatibility and proper installation;
The boiler is intended for use with mains-fed domestic hot water systems. The minimum water pressure requirement for optimal performance is 1.3 bar. This pressure is necessary to ensure adequate flow rates for both heating and hot water delivery.
When using plastic pipe work for the installation, ensure it has a polymeric barrier to prevent corrosion and ensure longevity. Additionally, it’s crucial to include a minimum 600mm length of copper pipe connected to the boiler to provide a reliable connection point.
Avoid using artificially softened water to fill the central heating system. This type of water can negatively impact the boiler’s components and reduce its lifespan. Use a suitable inhibitor or combined inhibitor/anti-freeze if the system is exposed to freezing conditions.
Condensate Pipe Work
Proper condensate pipe work is crucial for the efficient and safe operation of the Worcester Greenstar 28i Junior. This section provides guidelines for installing and maintaining the condensate drainage system.
The boiler produces condensate as a byproduct of its operation, which must be properly drained. The condensate pipe work should be sized appropriately and installed with a suitable slope to ensure gravity drainage. The recommended pipe size is 22mm internal diameter.
The condensate drainage pipe can be connected to a variety of outlets. The preferred option is to connect it to a drain pipe that leads directly to a sewer. If this is not feasible, an internal waste pipe in a kitchen or bathroom, or a washing machine waste pipe can be used. However, avoid connecting it to a rainwater down pipe that goes directly to a sewer, as this can cause issues with foul water.
If the condensate drainage pipe is connected to a drain pipe that goes directly to a sewer, an air break should be fitted to prevent sewer gases from entering the boiler. This air break should be installed in accordance with the manufacturer’s instructions and be positioned at least 100mm above the high water level of the drain pipe.
The condensate drainage pipe should be kept as short and vertical as possible to minimize the risk of blockages. Ensure the pipe is secured appropriately to prevent it from becoming loose or damaged.
External Connections
The Worcester Greenstar 28i Junior requires specific external connections to ensure proper operation. These connections include the gas supply, water supply, electrical supply, and flue connection. This section outlines the installation requirements for these external connections.
The gas supply should be connected to the boiler using a gas pipe that meets the appropriate standards. The gas pipe should be sized to ensure adequate gas flow to the boiler. Refer to the boiler’s technical data for the specific gas flow rate requirements. The gas supply pipe should be fitted with a gas isolator valve for safety.
The water supply should be connected to the boiler using a water pipe that meets the appropriate standards. The water pipe should be sized to ensure adequate water flow to the boiler. Refer to the boiler’s technical data for the specific water flow rate requirements. The water supply pipe should be fitted with a water isolator valve for safety.
The electrical supply should be connected to the boiler using a cable that meets the appropriate standards. The cable should be sized to ensure adequate electrical power to the boiler. Refer to the boiler’s technical data for the specific electrical power requirements. The electrical supply should be fitted with a circuit breaker for safety.
The flue connection should be connected to the boiler using a flue that meets the appropriate standards. The flue should be sized to ensure adequate ventilation for the boiler. Refer to the boiler’s technical data for the specific flue requirements. The flue should be installed in accordance with the manufacturer’s instructions and local building regulations.
Boiler Location and Clearances
Selecting the right location for your Worcester Greenstar 28i Junior is crucial for optimal performance and safety. This section covers the recommended location and clearance requirements for the boiler, ensuring proper installation and functionality.
The boiler should be installed in a well-ventilated area that is easily accessible for servicing and maintenance. Avoid installing the boiler in a location where it could be exposed to extreme temperatures, moisture, or direct sunlight. Ensure that the location allows for sufficient clearance around the boiler for airflow and serviceability.
The boiler should be installed on a fixed, rigid surface that can support its weight. The surface should be at least the same size as the boiler and capable of handling the load. Avoid installing the boiler on a soft or uneven surface as this can cause instability and potential damage to the appliance.
Refer to the installation manual for specific clearance requirements for the boiler, including minimum distances from walls, ceilings, and other objects. These clearances are essential for proper ventilation and safety; Ensure that the boiler is installed in a location that meets all the specified clearance requirements.
Plumbing Manifold
The plumbing manifold is a crucial component in the installation of your Worcester Greenstar 28i Junior boiler. It acts as a central hub for the connections between the boiler, heating system, and domestic hot water supply. The manifold allows for a streamlined and organized connection setup, simplifying installation and future maintenance;
The manifold typically includes multiple ports for connecting the boiler’s flow and return pipes, as well as separate ports for the hot water supply and return. Ensure the manifold is properly installed and secured, with all connections tightened securely to prevent leaks.
When connecting the plumbing manifold, use the appropriate fittings supplied with the hardware literature pack. These fittings are designed specifically for the boiler and ensure compatibility and proper sealing. If you are unsure about any aspect of the manifold installation, consult the installation manual or seek assistance from a qualified professional.