Contents

Preface
Contents
1 Key to symbols and safety instructions
- 1.1 Key to symbols
- 1.2 Safety precautions
- 2 General information
  - 2.1 Energy efficiency
  - 2.2 Servicing
  - 2.3 Benchmark standard
  - 2.4 User caution
- 3 Controls
  - 3.1 Appliance controls
    - 3.1.1 Appliance display
    - 3.1.2 Basic adjust mode
  - 3.2 Central heating
    - 3.2.1 View central heating set temperature
    - 3.2.2 Setting the appliance flow temperature for the central heating system
    - 3.2.3 Set economic temperature - Central heating
    - 3.2.4 Turning the central heating off during the summer
    - 3.2.5 Appliance frost protection
  - 3.3 Domestic hot water
    - 3.3.1 View domestic hot water set temperature
    - 3.3.2 Setting the flow temperature for the domestic hot water
    - 3.3.3 Mid point domestic hot water temperature
    - 3.3.4 Domestic hot water eco and preheat modes
    - 3.3.5 Domestic hot water preheat mode manual activation (Eco mode off)
    - 3.3.6 Domestic hot water preheat mode timed activation, with facia timer or external timer connected (eco mode off)
    - 3.3.7 Turn off the heat requirement demand light (blue)
- 4 System pressure
  - 4.1 Sealed heating system
  - 4.2 Locating the integral filling link
  - 4.3 Optional integral keyless filling link
  - 4.4 Optional integral keyed filling link
  - 4.5 External filling link
- 5 Clearances
- 6 Maintaining your appliance
- 7 Fault finding
  - 7.1 Appliance alert state
  - 7.2 Appliance reset
  - 7.3 Extreme cold weather
- 8 Fault or breakdown
- 9 Tips on energy saving
- 10 Environment/disposal
- 11 Your guarantee
- 12 Glossary

Worcester Greenstar 25i 2015 User Instructions

Worcester Greenstar 25i 2015 Boiler manual cover

Pages 32

Year 2015

Language(s)

of 32

Worcester Greenstar 25i 2015 Boiler Specification

The Worcester Greenstar 25i 2015 Boiler is a highly efficient, compact gas-fired condensing combination boiler designed for residential use. With a maximum central heating output of 24 kW, it is suitable for small to medium-sized homes, efficiently providing both heating and hot water without the need for a separate hot water cylinder. This boiler boasts an ErP A rating for both heating and hot water, reflecting its high energy efficiency and cost-saving potential. It incorporates a user-friendly digital control panel, allowing for easy temperature adjustments and system configuration. The boiler features a stainless steel heat exchanger, enhancing durability and heat transfer efficiency. It includes built-in frost protection, ensuring reliable operation even in colder climates. The Greenstar 25i is compatible with a range of smart thermostats, offering users enhanced control over their heating system. Its compact design allows for flexible installation in a variety of locations, including kitchen cupboards. The boiler operates with low noise levels, ensuring minimal disruption to household environments. It supports both natural gas and an optional LPG conversion, providing versatility in fuel choice. The Greenstar 25i is engineered with various safety features, including a pressure relief valve and automatic air vent. It also includes a pre-assembled wall frame with a keyless filling link, simplifying installation and maintenance. The boiler's eco-friendly design is compliant with the latest NOx emissions regulations, contributing to reduced environmental impact. With a manufacturer's warranty extending up to seven years upon registration and annual servicing, the Worcester Greenstar 25i 2015 Boiler represents a reliable, energy-efficient solution for modern home heating and hot water needs.

Worcester Greenstar 25i 2015 Boiler F.A.Q.

How do I reset the Worcester Greenstar 25i 2015 boiler?

To reset the Worcester Greenstar 25i boiler, press and hold the reset button on the control panel for 3 seconds until the reset light stops flashing.

What should I do if the boiler pressure is too low?

If the boiler pressure is too low, use the filling loop to add water to the system until the pressure gauge reads between 1 and 1.5 bar. Ensure the valves are closed after refilling.

How often should I service my Worcester Greenstar 25i boiler?

It is recommended to service your Worcester Greenstar 25i boiler annually to ensure optimal performance and efficiency.

What does the blue light flashing on my boiler indicate?

A flashing blue light on the Worcester Greenstar 25i typically indicates a fault with the boiler. Refer to the user manual for specific fault codes and solutions.

How can I bleed radiators connected to my Worcester Greenstar 25i boiler?

To bleed your radiators, turn off your heating, use a radiator key to open the valve at the top of the radiator, and let the air escape until water starts to trickle out. Close the valve securely after bleeding.

Why is my Worcester Greenstar 25i boiler making loud noises?

Loud noises may be due to air in the system, limescale build-up, or faulty components. Bleed the system or consult a professional engineer for further diagnosis.

Can I use a smart thermostat with my Worcester Greenstar 25i boiler?

Yes, the Worcester Greenstar 25i is compatible with many smart thermostats. Ensure the thermostat is properly installed and configured for optimal performance.

What is the eco mode on the Worcester Greenstar 25i boiler?

The eco mode on the Worcester Greenstar 25i reduces energy consumption by adjusting the preheat settings for the hot water, leading to improved efficiency.

How do I adjust the temperature settings on my Worcester Greenstar 25i boiler?

Use the control panel on the boiler to adjust the temperature settings. Refer to the user manual for detailed instructions on navigating the menu and changing settings.

What should I do if my Worcester Greenstar 25i boiler is leaking water?

If your boiler is leaking water, turn off the water supply and boiler, then contact a qualified heating engineer to inspect and repair the issue.