Greenstar CDi (Combi) User.qxd

17.02.2005

9:50 Uhr

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GREENSTAR CDi
WALL HUNG RSF GAS-FIRED CONDENSING COMBINATION BOILER
FOR SEALED CENTRAL HEATING SYSTEMS AND MAINS FED DOMESTIC HOT WATER

611 927-00.1O

THE APPLIANCE IS FOR USE WITH NATURAL GAS OR L.P.G. (Cat II 2H3P TYPE C13 & C33) 25CDi GC-Number 47-311-92 30CDi GC-Number 47-311-93 35CDi GC-Number 47-311-94 40CDi GC-Number 47-311-95
USER INSTRUCTIONS & CUSTOMER CARE GUIDE

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CONTACT INFORMATION
PLEASE READ THESE INSTRUCTIONS CAREFULLY BEFORE OPERATING YOUR APPLIANCE THESE INSTRUCTIONS ARE APPLICABLE TO THE WORCESTER BOSCH APPLIANCE MODEL(S) STATED ON THE FRONT COVER OF THIS MANUAL ONLY AND MUST NOT BE USED WITH ANY OTHER MAKE OR MODEL OF APPLIANCE. THE INSTRUCTIONS APPLY IN THE UK ONLY AND SHOULD BE FOLLOWED EXCEPT FOR ANY STATUTORY OBLIGATION. IF YOU ARE IN ANY DOUBT CONTACT THE WORCESTER BOSCH TECHNICAL HELPLINE. DISTANCE LEARNING AND TRAINING COURSES ARE AVAILABLE FROM WORCESTER BOSCH. THIS APPLIANCE MUST BE INSTALLED BY A COMPETENT PERSON. FAILURE TO INSTALL CORRECTLY COULD LEAD TO PROSECUTION. PLEASE LEAVE THIS GUIDE, THE INSTALLATION INSTRUCTIONS AND THE COMPLETED BENCHMARK LOG BOOK WITH THE USER OR AT THE GAS METER AFTER INSTALLATION. ABBREVIATIONS USED IN THIS BOOK: NG - Natural Gas LPG - Liquid Petroleum Gas CH - Central Heating SEDBUK - Seasonal Efficiency of Domestic Boilers in the United Kingdom
WORCESTER BOSCH: TECHNICAL: SERVICE: SPARES: LITERATURE: TRAINING: SALES: WEBSITE: www.worcester-bosch.co.uk 01905 752640
WATER TREATMENT: FERNOX www.fernox.com SENTINEL 9595 www.betzdearborn.com/sentinel
FLUE TERMINAL GUARDS: TOWER FLUE COMPONENTS Vale Rise, Tonbridge TN9 1TB
WORCESTER BOSCH GREENSTAR 25CDi/30CDi/35CDi/40CDi 611 928a (02/05)

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USING YOUR APPLIANCE CONTROLS OPERATING THE APPLIANCE Switching the appliance on/off Setting the central heating temperature Controlling central heating Frost protection Controlling domestic hot water Fault condition ENERGY SAVING TIPS ON ENERGY SAVING MAINTENANCE MAINTAINING YOUR APPLIANCE FAULT FINDING FAULT OR BREAKDOWN

12 13-14 14-15 15

GUARANTEE YOUR GUARANTEE GUARANTEE REGISTRATION

CONTENTS

GUARANTEE

MAINTENANCE

ENERGY SAVING

USING YOUR APPLIANCE

INTRODUCTION EXCELLENCE COMES AS STANDARD SAFETY PRECAUTIONS GENERAL NOTES

4 5-7 8-11

INTRODUCTION

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EXCELLENCE COMES AS STANDARD
Thank you for purchasing a Greenstar 25CDi/30CDi/35CDi/40CDi gas-fired condensing combination boiler manufactured by Worcester Bosch. The company prides itself on manufacturing boilers to the strictest quality control standards throughout every stage of production. Worcester Bosch has led the field in innovative appliance design and performance for more than 40 years. This heritage means all products are of exceptional quality and proven reliability. The Greenstar range in particular is extremely energy efficient, converting up to 97% of gas consumed into heat, offering you economical running costs and value for money. It sits in SEDBUK Band A, and is therefore amongst the top energy rated appliances available. There is also the reassurance of our nononsense 2 years parts and labour guarantee - backed up by Worcester Total Cover, an optional complete maintenance scheme to keep your boiler operating at peak condition and efficiency. To find out more about Worcester Bosch log onto www.worcesterbosch.co.uk.
EXCELLENCE COMES WORCESTER BOSCH GREENSTAR 25CDi/30CDi/35CDi/40CDi AS STANDARD

611 928a (02/05)

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IF YOU SMELL GAS: DONT SMOKE OR STRIKE DONT TURN ELECTRICAL SWITCHES ON OR OFF DO PUT OUT NAKED FLAMES DO OPEN DOORS AND WINDOWS MATCHES
BENCHMARK STANDARD Benchmark is a code of practice for correctly installing, commissioning and servicing of domestic water heating appliances. A Benchmark Checklist is provided by the manufacturer for the installer to complete ALL details together with their CORGI registration number and sign to confirm that the boiler has been installed and commissioned according to the manufacturers instructions. IMPORTANT: The completed Benchmark Checklist will be required in the event of any warranty work and may be required by the local Building Control Inspector. HEALTH & SAFETY The appliance contains no asbestos and no substances used in the construction process that contravene the COSHH Regulations (Control of Substances Hazardous to Health Regulations 1988).
DO KEEP PEOPLE AWAY FROM DO TURN OFF THE CONTROL VALVE AT THE METER TELEPHONE YOUR GAS COMPANY THE AREA AFFECTED

SAFETY PRECAUTIONS

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COMBUSTIBLE AND CORROSIVE MATERIALS Do not store or use any combustible materials (paper, thinners, paints etc.) inside or within the vicinity of the appliance. Chemically aggressive substances, such as halogenated hydrocarbons containing chlorine or fluorine compounds can corrode the appliance and invalidate any warranty.
FITTING & MODIFICATIONS Fitting the appliance, any controls to the appliance and removal of the outer casing may only be carried out by a competent engineer in accordance with the Gas Safety (Installation and Use) Regulations. Flue systems must not be modified in any way other than as described in the Installation Instructions and 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. This does not affect your statutory rights.

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SERVICING The user is recommended to have the system regularly serviced by a competent, qualified engineer (such as British Gas or CORGI registered personnel) using original spares, to help maintain the economy, safety and reliability of the appliance and to have the Service Record completed in the Benchmark Checklist. The appliance should be serviced annually after installation unless the particular installation conditions and usage demand more frequent services. IMPORTANT - ensure that the service engineer completes the Service Record in the Benchmark Checklist after each service.

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GENERAL NOTES
To get the best from your appliance please read these instructions carefully. SEALED HEATING SYSTEMS This appliance is fitted to a sealed heating system which is pre-pressurised. Your installer will advise you of the minimum and maximum pressure which should be indicated on the pressure gauge. Check regularly that the pressure is maintained and contact your installer or maintenance engineer if a permanent significant drop in pressure is indicated on the pressure gauge. If the system loses pressure it should be re-pressurised and the cause of the fall investigated. CENTRAL HEATING SYSTEMS During the first few hours of operation of the central heating system, check that all radiators are being heated at an even rate. If the top of a radiator is at a lower temperature than the bottom then it should be vented by releasing air through the venting screw at the top of the radiator. Ask your installer to show you how this is done. This boiler is fitted to a sealed system; repeated venting will reduce the quantity of water in the system and this must be

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replenished for safe and satisfactory operation of the appliance. Should water leaks be found in the system or if excessive venting is required, then a service engineer must be contacted to inspect the installation and rectify any fault. Only additives that are compatible with aluminium may be used in the system. Any incompatible additive used will invalidate the guarantee. CONDENSATE DRAIN This is a condensing appliance and the terminal will, at times give out a plume of water vapour. This is quite normal.

+ 30mm above elbow

The appliance also produces quantities of condensate which is discharged regularly by a siphon within the boiler via a pipe to drain. This pipe must not be blocked or altered in any way. CLEARANCES - VENTILATED COMPARTMENT

5mm 1450mm

*600mm 600mm (**20mm)
Your installer will have provided adequate space around the appliance for safety and servicing access. Do not restrict this space with the addition of cupboards, shelves etc. next to the appliance. *600 mm service clearance required to a fixed surface (**20 mm from removable door or panel)

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BOILER CLEARANCES UNVENTILATED COMPARTMENT The diagrams (A and B) opposite show two options for the minimum space required to install and service the boiler inside an unventilated compartment.

200mm*

100mm** 600mm***
* This space can be reduced to 50 mm for one side only as long as both the side clearances add up to the total of both the side measurements shown or more. ** Space required for unventilated areas with a removable door or panel. *** 600 mm clearance required to a fixed surface for servicing. ROOM THERMOSTAT

+ 250mm above elbow

A room temperature controller and programmer should be fitted to control the central heating. Refer to the instructions supplied with the thermostat for information on siting and setting. THERMOSTATIC RADIATOR VALVES

100mm*

100mm** to removable door 600mm*** front clearance for service
It is recommended that this type of valve is fitted to all but one of the radiators (or at least those in the sleeping accommodation). The remaining radiator, which must be where the room thermostat is located, should be uncontrolled and must be left open. The thermostatic radiator valves should conform to the requirements of BS2767:10.

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VENTILATION This is a room sealed appliance and does not require any air for combustion from inside the property. If the appliance is fitted into a cupboard or a compartment is built around the appliance after installation, then the compartment must be separated from the boiler space by a perforated non-combustible partition as described in BS 6798. Notwithstanding the requirements of BS 6798 and BS 5440 there is no need for ventilation openings to be provided in the compartment because of the low heat loss from the appliance casing, if the clearances shown are maintained. Do not operate the appliance if the flue terminal fitted on the outside wall or roof is obstructed or damaged. PUMP ANTI-SEIZURE If there has been no heating demand for 24 hours the boiler will run the system pump for a few seconds to reduce the possibility of pump seizure during long periods of inactivity, which is usually more frequent during the summer months.

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CONTROLS

A D F L

K E H M

611 928-01.1O

A - MASTER SWITCH FOR ON/OFF B - MAINS ON/OFF INDICATOR + FAULT DIAGNOSTIC LIGHT C - CENTRAL HEATING TEMPERATURE CONTROL D - BURNER ON INDICATOR LIGHT (GREEN) E - FAULT RESET BUTTON F - SERVICE BUTTON G - DOMESTIC HOT WATER TEMPERATURE CONTROL H - ECO BUTTON (DOMESTIC HOT WATER PRE-HEAT ON/OFF) IJSYSTEM PRESSURE GAUGE POSITION FOR OPTIONAL PROGRAMMER
K - DISPLAY L - CENTRAL HEATING BOOST BUTTON M - HOLIDAY BUTTON

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OPERATING THE APPLIANCE
SWITCHING THE APPLIANCE ON/OFF Switching on
B Switch on the appliance by pressing the master switch. The indicator light shows blue The boiler runs for 15 minutes at minimum heating output to fill the condensate trap, the display (K) alternates between -II- and the central heating flow temperature. This occurs every time the mains supply has been interrupted. Switching off B Switch off the appliance by pressing the master switch. The blue indicator light goes out. SETTING THE CENTRAL HEATING TEMPERATURE B Turn the central heating temperature control to the desired level, between 40 C and 90 C. B When the burner is lit, the green indicator light underneath the on/off switch is illuminated. CONTROLLING CENTRAL HEATING B Set the timer to the correct time. B Set room thermostat to the desired room temperature. B Set the thermostatic radiator valves to the desired settings.

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FROST PROTECTION B Leave master switch on.
B Turn the central heating temperature control to. If the temperature falls to 5 C within the boiler it will fire to avoid the possibility of freezing. B Add a suitable anti-freeze fluid to the water in the central heating system. B If remote pipework is likely to be subjected to freezing conditions, ensure the installer has fitted a frost thermostat in the area to protect the pipework. CONTROLLING THE HOT WATER TEMPERATURE B The hot water temperature can be set to between approx. 40 C and 60 C using the temperature control.
DOMESTIC HOT WATER PRE-HEAT Pre-heat reduces the time taken to produce hot water at the tap and is controlled by the ECO button. B Press the ECO button to select either: When the ECO button is not illuminated the boiler will be in pre-heat mode

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(which will reduce the time taken to produce hot water at the tap). OR When the ECO button is illuminated the boiler will be in ECO mode with no pre-heat available. FAULT CONDITION In the unlikely event of a fault occurring while the appliance is in operation: The reset button will flash once per second and the mains indicator (blue light) will flash also. The display shows a fault code. B To reset boiler press the reset button. The reset button will no longer be illuminated and the mains indicator will stop flashing. The boiler will function normally, dependent on programmer and room thermostat settings. If the fault remains and cannot be cleared by pressing the reset button, or if fault persists contact Worcester Bosch for assistance, giving a description of the fault and, if possible, the fault code from the display.

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TIPS ON ENERGY SAVING
Heating economically The boiler is designed to provide a high level of comfort while keeping gas consumption and the resulting environmental effect as low as possible. The gas supply to the burner is controlled according to the level of demand for heat. The boiler continues to operate with a low flame if the demand for heat reduces. The technical term for this process is modulating control. Modulating control reduces temperature fluctuations and provides even distribution of heat throughout the home. This means that the boiler may stay on for relatively long periods but will use less gas than an appliance that continually switches on and off. Central heating systems with room thermostats/thermostatic radiator valves The central heating control on the boiler should be set to the maximum rated temperature of the central heating system. The temperature of each room can be set individually (except primary room with the room thermostat) using the thermostatic radiator valves. Roof insulation Around 30% of the heat loss from a property is through the roof. Replace any old insulation with new insulation, preferably of around 200 mm thickness or more. Window frames Single glazed windows, particularly those with steel frames, can lose a great deal of heat. Consideration should be given to replacement with PVCu or wooden framed double glazed units. Curtains Lined curtains, or heavier full length curtains can provide excellent insulation. However, always ensure that the curtains do not drape over radiators.

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Draughts Try to ensure that draughts around doors, windows, letterboxes and keyholes etc. are reduced by using a suitable draught excluder. Warning - Do not block or seal any air vents that are installed to ensure the central heating boiler operates safely. Room thermostats Reducing the setting of the room thermostat by 1 C can reduce fuel consumption by up to 10%. New control systems Upgrade your heating control system if necessary with the latest equipment available. The minimum level of control is a programmer, interlocking room thermostat and thermostatic radiator valves. Radiators More often than not radiators will be sited underneath a window, so the warm air from the radiator heats the colder incoming air from the window. The performance of the radiator will be affected if the curtains are allowed to drape over the radiator or shelves are fitted above it. The positioning of furniture and tables in front of the radiator should also be avoided. It is advisable to manually adjust all radiator thermostatic valves every 2-3 months to prevent them sticking. It is also important that the plastic tops of all valves are always in position and not cracked or damaged to prevent accidents. Care should be taken when vacuum cleaning carpets to avoid damage to valves and pipework. The heating system and the outputs of the radiators have been carefully selected by your installer. The temperature obtainable in any given room is dependent on all radiators being operated at the same time. If you decide to turn off radiators in unused rooms, spare bedrooms etc., you may experience slightly lower room temperatures in rooms adjacent to unheated rooms.

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MAINTAINING YOUR APPLIANCE
Your new Greenstar 25CDi/30CDi/ 35CDi/40CDi gas-fired appliance represents a long term investment in a reliable, high quality product. In order to realise its maximum working life, and to ensure it continues to operate at peak efficiency and performance, it is essential that your boiler receives regular servicing and maintenance checks from a competent person beyond the initial 2 year guarantee period.

If you would like to know more about a Worcester Bosch service contract, please tick the appropriate box on your warranty registration card. If your Greenstar 25CDi/30CDi/ 35CDi/40CDi should fail to operate correctly or requires servicing please contact the Worcester Bosch Service Department (see inside front cover for details). Details of the boiler including the Gas Council number can be found under the controls cover flap on the boiler.

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FAULT FINDING
This table gives information on basic operating system problems. In the unlikely event of a boiler fault please read the following page thoroughly before contacting Worcester Bosch.

Problem

Remedy Increase thermostatic radiator valve setting(s)
Desired room temperature Thermostatic radiator is not reached valve(s) set too low
Temperature control for CH Increase CH flow temperaflow on boiler set too low ture control setting
Air trapped in heating system Desired room temperature Radiators are too hot exceeded by large amount
Bleed radiators and recharge heating system Turn down thermostatic radiator valves / room thermostat Reduce central heating temperature on boiler
Heating stays on for too long No on/off indicator
Clock is incorrectly set Momentary power failure
Check setting Switch off appliance at master switch, wait a few seconds then switch on again Check setting Check setting Check setting
Hot water temperature too Temperature set too low low Programmer setting Hot water temperature too Temperature set too high high
Water flow at tap too high Reduce flow rate at tap

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FAULT OR BREAKDOWN
This appliance is supported in the UK by Worcester, Bosch Group. Specialist factory trained Service Engineers are available to attend a breakdown occurring on this appliance. No charge will be made for parts and/or labour providing: B An appliance fault is found and the appliance has been installed within the past 24 months. Reasonable evidence of this must be supplied on request. i.e. the Benchmark Checklist.
A call-out charge will be made where: B The appliance has been installed for over 24 months. OR B Evidence cannot be provided that the first year service inspection has been carried out (ie. an entry in the Benchmark Checklist). OR B Our Field Service Engineer finds no fault with the appliance (see Note). OR B The cause of breakdown is misuse or with other parts of your plumbing/heating system, or with equipment not supplied by Worcester Bosch.

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Note: NO APPLIANCE FAULT IS FOUND ON OVER 30% OF ALL SERVICE CALL OUTS. Please read this guide carefully to gain a good understanding of the operation of your appliance. In the case of a suspected fault, refer to the fault finding section of this guide. If in doubt contact our Technical Helpline In the event of an appliance fault or breakdown please contact our Service Department. Your service administrator will arrange for an engineer to call with the minimum of delay; under normal circumstances this will be from 1 - 3 working days (excluding weekends) for priority breakdown situations (no hot water and/or heating). Invoices for attendance and repair work carried out on this appliance by any third party will not be accepted.

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YOUR GUARANTEE
This appliance is guaranteed against faulty material or workmanship for a period of 2 years from the date of installation subject to the following terms and conditions. B Your Guarantee Registration Card must be returned within 30 days for the second year of your guarantee to become valid. B During the period of this guarantee any components of the unit which are proven to be faulty or defective in manufacture will be exchanged or repaired free of charge by BBT Thermotechnology UK Ltd. B The householder may be asked to prove the date of installation, that the appliance was correctly commissioned and, where appropriate, the first years service has been carried out to the satisfaction of BBT Thermotechnology UK Ltd. when requested. These should be part of the Benchmark Checklist. B Any product or part returned for servicing under the guarantee must be accompanied by a claim stating the model, serial number & date of installation. B BBT Thermotechnology UK Ltd. will not accept responsibility for damage caused by faulty installation, neglect, misuse or accidental damage or the nonobservance of the instructions contained in the Installation and Servicing Manual and User Instructions. B The appliance has been used only for the normal domestic purposes for which it was designed. B This guarantee applies only to equipment purchased and used in the United Kingdom. This guarantee does not affect your statutory rights.

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GUARANTEE REGISTRATION
You should complete and return the postpaid Guarantee Registration Card within 14 days of purchase. Returning the card will register you as the owner of your new Greenstar 25CDi/30CDi/35CDi/40CDi appliance and will assist us in maintaining an effective and efficient customer service by establishing a reference and permanent record for your boiler. This does not affect your statutory rights. For your own record:

(See guarantee card)

Type / size

Date of installation

Check that the Benchmark Checklist has been completed by your installer or service engineer.

Serial No.

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Worcester, Bosch Group Cotswold Way, Warndon, Worcester WR4 9SW. Tel. Fax. www.worcester-bosch.co.uk Worcester Bosch Group is a trading name of BBT Thermotechnology UK Ltd. 611 928a (02/05) OSW