Contents

General checks before calling a Service engineer
- User instructions & customer care guide
- Abbreviations
- Dedicated to heating comfort
- Contents
- 1 Introduction
  - 1.1 Explanation of symbols
    - Warning symbols
    - Important information
    - Additional symbols
  - 1.2 Safety precautions
  - 2 General Information
    - 2.1 Energy efficiency
    - 2.2 Servicing
    - 2.3 User caution
  - 3 Using your boiler
    - 3.1 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 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 Fault finding
    - 4.3 Maintaining your boiler
      - Maintenance tips
      - Use in hard water areas
    - 4.4 Servicing
  - 5 General information
    - 5.1 Ventilation information
      - Boiler location
      - Ventilation
      - Servicing clearances
    - 5.2 General notes
      - Central heating systems
      - Condensate drain
      - Clearances - Service
      - Room thermostat
      - Thermostatic radiator valves
      - Oil supply
  - 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 Heatslave 2 12/18 2014 User Instructions

Worcester Heatslave 2 12/18 2014 Boiler manual cover

Pages 16

Year 2014

Language(s)

of 16

Worcester Heatslave 2 12/18 2014 Boiler Specification

The Worcester Heatslave 2 12/18 is a high-efficiency oil-fired combi boiler designed to provide both central heating and domestic hot water. Introduced in 2014, this model is part of Worcester's Heatslave series, known for its reliability and performance. It is particularly suitable for small to medium-sized homes due to its compact design and efficient operation. The boiler integrates a highly efficient stainless steel heat exchanger, which maximizes heat transfer and minimizes energy waste, contributing to a high seasonal efficiency rating.

The Worcester Heatslave 2 12/18 features an output range of 12 to 18 kW, making it adaptable to varying heating demands. Its compact dimensions and wall-mounted design allow for flexible installation options, fitting comfortably into kitchen or utility areas. The boiler includes a built-in hot water cylinder that ensures a rapid supply of hot water on demand, eliminating the need for a separate storage tank.

Advanced control systems enhance user convenience and energy management. The boiler is compatible with a range of optional controls, including wireless and smart thermostats, which enable precise temperature regulation and scheduling. This model also supports eco-friendly operation with low NOx emissions, adhering to environmental standards.

Maintenance and servicing are simplified through easy access to internal components, aided by a front-facing control panel. The durable construction and high-quality components reduce the frequency of repairs and extend the operational lifespan. Safety features include frost protection and a pressure relief valve, ensuring reliable performance in various conditions. The Worcester Heatslave 2 12/18 represents a balanced solution for homeowners seeking efficient heating and hot water provision with minimal environmental impact.

Worcester Heatslave 2 12/18 2014 Boiler F.A.Q.

How do I reset my Worcester Heatslave 2 12/18 boiler?

To reset your Worcester Heatslave 2 12/18 boiler, locate the reset button on the control panel. Press and hold it for a few seconds until the reset light goes off, indicating the boiler has been reset.

What should I do if my Worcester Heatslave 2 12/18 boiler is not heating water?

First, check if the boiler has power and that the thermostat is set correctly. Make sure the pressure gauge reads between 1 and 1.5 bar. If these are all correct and the problem persists, consult a professional technician.

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

It is recommended to service your Worcester Heatslave 2 12/18 boiler annually to ensure it operates efficiently and safely. Regular servicing can also help identify potential issues early.

What does the error code EA mean on my Worcester Heatslave 2 12/18 boiler?

The error code EA indicates that the boiler has failed to ignite. Check the gas supply and ensure that there is no air in the system. If the issue continues, contact a qualified technician.

How can I improve the efficiency of my Worcester Heatslave 2 12/18 boiler?

To improve efficiency, ensure your boiler is regularly serviced, keep radiators bled to prevent air locks, insulate your home to reduce heat loss, and consider installing a programmable thermostat.

Is it normal for my Worcester Heatslave 2 12/18 boiler to make a noise?

Some noise is normal, but if you hear banging, whistling, or gurgling sounds, it could indicate air in the system, low water pressure, or a buildup of limescale. Have it checked by a professional if the noise persists.

What should I do if my Worcester Heatslave 2 12/18 boiler is leaking water?

If your boiler is leaking, turn off the water supply and the boiler's power. Check for visible leaks and call a qualified engineer to diagnose and repair the issue.

How can I bleed the radiators connected to my Worcester Heatslave 2 12/18 boiler?

To bleed radiators, turn off the heating and use a radiator key to slightly open the bleed valve. Let the trapped air escape until water starts to flow steadily, then close the valve.

Why is the pressure on my Worcester Heatslave 2 12/18 boiler dropping?

Pressure loss can be due to leaks, a faulty pressure relief valve, or air trapped in the system. Check for visible leaks and re-pressurize the system. If the issue continues, consult a professional.

How do I adjust the temperature settings on my Worcester Heatslave 2 12/18 boiler?

You can adjust the temperature settings using the control panel on your boiler. Refer to the user manual for detailed instructions on selecting the desired temperature for both heating and hot water.