Remove appropriate cable restraints from the new control box. Pressure switch Page Replacement Of Parts Pull heat exchanger assembly up to clear. Diverter valve motor Disconnect the electrical connector from the diverter valve motor. Pump head Ensure the boiler is fully drained see draining the appliance. Disconnect the electrical connection from the bottom of the pump.
Page 50 To refit, follow the above in reverse. Ensure any seals that have been disturbed are renewed. Page 51 To refit, follow the above in reverse. Page 52 Expansion vessel The expansion vessel can be replaced with the boiler in position if there is a side exit flue fitted and there is a minimum clearance of mm above the boiler casing. If vertical flue is fitted then a similar clearance to one side and the flue is required.
H26 GC No. Page Conversion 2. Pull valve up and forward out of boiler. Fit plastic retaining nut to the outlet of the gas valve from the kit and hand tighten. Worcester cannot be held responsible for costs incurred by persons not deemed to be competent. The electronic control system for this boiler incorporates a blue central indicator. This normally confirms the permanent mains supply but, by flashing at different rates during a fault, provides a guide to the cause as listed.
Service Provider. This manual is also suitable for: Greenstar 28i junior. Order hard copy Please use the form to order printed copies of the document you selected. Document details Title. First Name. Last Name. Email Address. Address Search.
Please provide at least one Unit number, Building name or House Number. Unit number. Building name. Chemically aggressive substances, such as halogenated hydrocarbons containing chlorine or fluorine compounds can corrode the appliance and invalidate any warranty. Fitting the appliance and any controls to the appliance may only be carried out by a competent engineer in accordance with the current Gas Safety Installation and Use Regulations.
Flue systems must not be modified in any way other than as described in the fitting instructions. Any misuse or unauthorised modifications to the appliance, flue or associated components and systems could invalidate the warranty. The manufacturer accepts no liability arising from any such actions, excluding statutory rights.
Advise the user to have the system serviced annually by a competent, qualified engineer such as British Gas or CORGI registered personnel using approved spares, to help maintain the economy, safety and reliability of the appliance. Failure to install appliances correctly could lead to prosecution. EN : Central heating for domestic premises BS : Flues and ventilation for gas appliances of rated heating not exceeding 70kW net : Flues.
BS : Flues and ventilation for gas appliances of rated heating not exceeding 70kW net : Air Supply. Where no specific instruction is given, reference should be made to the relevant British Standard codes of Practice. An appliance using L. All seals, joints and compounds including flux and solder and components used as part of the secondary domestic water system must be approved by WRAS.
Artificially softened water must not be used to fill the central heating system. A - Wall hung gas fired condensing combi boiler for central heating and domestic hot water. The diagram opposite shows the controls in the servicing position and excludes the outer case. Failure to comply with the guidelines for the use of water treatment with the appliance will invalidate the appliance warranty.
The PH value of the system water must be less than 8 or the appliance guarantee will be invalidated. If necessary, fit a pressure reducing valve. IMPORTANT: Non-return, back flow prevention devices including those associated with water meters fitted to the mains water supply can cause a pressure build up which could damage the boiler and other household appliances.
Normally there is no need for water treatment to prevent scale formation as the maximum temperature of the DHW heat exchanger is limited in the electronic circuit. In areas where temporary water hardness exceeds ppm, consideration may need to be given to the fitting of a scale prevention device.
In such circumstances, the advice of the local water authority should be sought. The pipework from the boiler to the blending valve must be in copper or steel protected from corrosion. Care should be taken when siting the outlet pipe so that it does not cause an obstruction or discharge above a window, entrance or other public access where it could cause a hazard.
Note: Top and bottom clearances must not be reduced below these values as they are the minimum required for servicing. This boiler is only suitable for installing internally within a property at a suitable location onto a fixed, rigid non-combustible surface at least the same size as the boiler and capable of supporting the boiler weight.
The diagram opposite shows the minimum space required to install and service the boiler. Table Of Contents. Quick Links. Table of Contents. Previous Page. Next Page. Worcester Greenstar 12i System Instruction Manual 74 pages.
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