Worcester Greenstar 25Si 2005 User Instructions

Worcester Greenstar 25Si 2005 Boiler manual cover

Pages 20

Year 2005

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Worcester Greenstar 25Si 2005 Boiler Specification

The Worcester Greenstar 25Si, launched in 2005, is a compact, wall-mounted combination boiler designed for domestic use. It integrates advanced technology to deliver efficient heating and hot water production in small to medium-sized homes. The boiler boasts a maximum central heating output of 24 kW and a domestic hot water output of 25 kW, providing optimal performance for households with one bathroom. Featuring a high-efficiency condensing design, the Greenstar 25Si utilizes a modulating pump and a fan-assisted burner to achieve an efficiency rating of over 90%, which contributes to reduced energy consumption and lower heating bills.

The boiler incorporates Worcester’s advanced Heatronic III electronic control system, offering precise regulation of heating and hot water functions. This system enhances user convenience with easy-to-use controls, including a digital display for monitoring operating status and diagnostics. The unit is equipped with built-in frost protection, ensuring reliable operation during colder months, and an anti-cycle function to prevent unnecessary energy consumption. Additionally, the Greenstar 25Si includes a pre-heat function for instant hot water availability, which enhances user comfort and efficiency.

Compact dimensions make it suitable for installation in various home environments, including kitchen cupboards and small utility spaces, while its quiet operation ensures minimal disruption. The Greenstar 25Si supports a range of optional controls and accessories, allowing further customization to meet specific user requirements. It is also compatible with solar water heating systems, providing an eco-friendly option for households looking to reduce their carbon footprint. The Worcester Greenstar 25Si reflects a balance of performance, efficiency, and user-friendly design, making it a popular choice for modern domestic heating solutions.

Worcester Greenstar 25Si 2005 Boiler F.A.Q.

How do I reset the Worcester Greenstar 25Si 2005 Boiler?

To reset the Worcester Greenstar 25Si 2005 Boiler, press and hold the reset button on the control panel for about 5 seconds. The reset button is typically marked with a flame symbol or the word "Reset."

What should I do if my boiler is not igniting?

Check if the boiler is receiving power and the gas supply is on. Ensure the thermostat is set to the desired temperature. If the issue persists, consult the manual for error codes or contact a professional technician.

How often should I service my Worcester Greenstar 25Si 2005 Boiler?

It is recommended to service your Worcester Greenstar 25Si 2005 Boiler annually to ensure efficient operation and to prevent potential issues.

Why is my boiler making a banging noise?

The banging noise could be due to air in the system, low water pressure, or a build-up of limescale known as "kettling." Bleed the radiators and check the pressure gauge. If the noise continues, contact a professional engineer.

How can I increase the water pressure in my boiler?

Locate the filling loop, usually beneath the boiler, and open the valves to allow water into the system. Monitor the pressure gauge and close the valves once the pressure reaches the recommended level, typically between 1 and 1.5 bar.

What does the fault code EA mean on my Worcester Greenstar 25Si 2005 Boiler?

Fault code EA indicates a failure to ignite. Check the gas supply, ensure the boiler is receiving power, and reset the boiler. If the issue persists, consult a qualified technician.

How do I bleed a radiator connected to my Worcester Greenstar 25Si 2005 Boiler?

Turn off the heating, place a cloth or container under the radiator's bleed valve, and use a bleed key to open it slightly. Allow trapped air to escape until water starts to flow, then close the valve tightly.

What could cause my boiler to lose pressure?

Common causes of pressure loss include leaks in the system, a faulty pressure relief valve, or air trapped in the radiators. Inspect the system for visible leaks and bleed radiators to release trapped air.

How do I adjust the temperature settings on my Worcester Greenstar 25Si 2005 Boiler?

Use the temperature control dial on the boiler's front panel to adjust the desired temperature for heating and hot water. Refer to the user manual for guidance on specific settings.

What maintenance tasks can I perform on my boiler?

Regularly check the pressure gauge, bleed the radiators, and inspect for leaks. Ensure the external flue is unobstructed and keep the boiler's surroundings clear of clutter. Schedule annual servicing by a qualified engineer.