Bosch WORCESTER benchmark Greenstar 12i Bedienungsanleitung

Greenstar 12i/24i System

WALL HUNG GAS-FIRED CONDENSING SYSTEM BOILER

FOR SEALED CENTRAL HEATING SYSTEMS & INDIRECT FED DOMESTIC HOT WATER

USER INSTRUCTIONS &

CUSTOMER CARE GUIDE

THIS BOILER IS USED WITH

NATURAL GAS OR LPG (Cat II 2H3P TYPE C13, C33 & C53)

NATURAL GAS 12i System GC NUMBER: 41 311 67

24i System GC NUMBER: 41 311 68

LIQUID PETROLEUM GAS 12i System GC NUMBER: 41 311 69

24i System GC NUMBER: 41 311 70

CONTACT INFORMATION

WORCESTER BOSCH:

TECHNICAL: 08705 266241

SERVICE: 08457 256206

LITERATURE: 01905 752556

SALES: 01905 752640

WEBSITE: www.worcester-bosch.co.uk

USER INSTRUCTIONS & CUSTOMER

CARE GUIDE

PLEASE READ THESE INSTRUCTIONS

CAREFULLY BEFORE OPERATING YOUR

BOILER

THESE INSTRUCTIONS ARE APPLICABLE TO

THE WORCESTER, BOSCH GROUP BOILER

MODEL(S) STATED ON THE FRONT COVER OF

THIS MANUAL ONLY AND MUST NOT BE USED

WITH ANY OTHER MAKE OR MODEL OF

BOILER.

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 SUPPORT.

DISTANCE LEARNING AND TRAINING

COURSES ARE AVAILABLE FROM

WORCESTER, BOSCH GROUP.

THIS BOILER MUST BE INSTALLED BY A

CORGI REGISTERED, 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

USER INSTRUCTIONS &

CUSTOMER CARE GUIDE

WORCESTER BOSCH GREENSTAR 12i & 24i SYSTEM

8 716 115 171a (06/2008)

CONTENTS

WORCESTER BOSCH GREENSTAR 12i & 24i SYSTEM

8 716 115 171a (06/2008)

CONTENTS

INTRODUCTION

DEDICATED TO HEATING COMFORT 1

SAFETY PRECAUTIONS 2

GENERAL NOTES 3

USING YOUR BOILER

CONTROLS 6

OPERATING THE BOILER 7

Switching the boiler on/off 7

Setting the central heating temperature 7

Controlling central heating 7

Frost protection 7

Fault condition 8

MAINTENANCE

MAINTAINING YOUR BOILER 9

FAULT FINDING 10

FAULT OR BREAKDOWN 11

ENERGY SAVING

TIPS ON ENERGY SAVING 13

GUARANTEE

YOUR GUARANTEE 15

GUARANTEE REGISTRATION 16

INTRODUCTION

USING YOUR

BOILER

ENERGY

SAVING

GUARANTEE

Dedicated to heating comfort

Thank you for purchasing a Greenstar gas-fired condensing boiler manufactured by

Worcester, Bosch Group. The company prides itself on manufacturing boilers to the

strictest quality control standards throughout every stage of production. Worcester,

Bosch Group has led the field in innovative boiler 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, offering low running

costs and value for money. It sits in SEDBUK band A, and is therefore amongst the top

energy rated boilers available.

There is also the reassurance of our no-nonsense 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 Group log on to www.worcester-bosch.co.uk.

MAINTENANCE

SAFETY PRECAUTIONS WORCESTER BOSCH GREENSTAR 12i & 24i SYSTEM

8 716 115 171a (06/2008)

INTRODUCTION

IF YOU SMELL GAS!

DO NOT SMOKE OR STRIKE MATCHES

DO NOT TURN ELECTRICAL SWITCHES ON OR OFF

PUT OUT NAKED FLAMES

OPEN DOORS AND WINDOWS

KEEP PEOPLE AWAY FROM THE AREA AFFECTED

TURN OFF THE CONTROL VALVE AT THE METER

CALL YOUR GAS COMPANY

COMBUSTIBLE AND CORROSIVE MATERIALS

Do not store or use any combustible materials (paper, thinners, paints etc.) inside or

within the vicinity of the boiler.

Chemically aggressive substances can corrode the boiler and invalidate any warranty.

FITTING & MODIFICATIONS

Fitting the boiler, any controls to the boiler 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 boiler,

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.

SAFETY PRECAUTIONS

GENERAL NOTES

WORCESTER BOSCH GREENSTAR 12i & 24i SYSTEM

8 716 115 171a (06/2008)

SERVICING

The boiler must be serviced regularly by a competent, qualified person, such as a

Worcester service engineer or alternatively a British Gas or other CORGI registered

person.

Always use original spares, to help maintain the economy, safety and reliability of the

boiler and to have the Service Record completed in the Benchmark checklist.

IMPORTANT:- Ensure that the service engineer completes the Service Record in

the Benchmark checklist after each service.

The completed Benchmark checklist will be required in the event of

any warranty work and may be required by the local Building Control

Inspector.

NOTE: The Benchmark checklist and service interval record can be found at

the rear of the Installation, Commissioning and Servicing

Instructions.

BENCHMARK STANDARD

‘Benchmark’ is a code of practice for correctly installing, commissioning and servicing

of domestic water heating boilers.

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 manufacturer’s

instructions.

HEALTH & SAFETY

The boiler contains no asbestos and no substances used in the construction process

that contravene the COSHH Regulations (Control of Substances Hazardous to Health

Regulations 1988).

INTRODUCTION

GENERAL NOTES

+ 30mm

above elbow

5mm

600mm**

200mm

25mm*

GENERAL NOTES

To get the best from your boiler please

read these instructions carefully.

SEALED HEATING SYSTEMS

This boiler 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 evenly. 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

replenished for safe and satisfactory

operation of the boiler.

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 boiler and the

terminal will, at times give out a plume of

water vapour. This is quite normal.

The boiler also produces quantities of

condensate which is discharged regularly

by a syphon within the boiler via a pipe to

drain. This pipe must not be blocked or

altered in any way.

CLEARANCES - VENTILATED

COMPARTMENT

Your installer will have provided adequate

space around the boiler for safety and

servicing access. Do not restrict this

space with the addition of cupboards,

shelves etc. next to the boiler.

GENERAL NOTES

ROOM THERMOSTAT

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

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 un-controlled and

must be left open. The thermostatic

radiator valves should conform to the

requirements of BS2767:10.

INTRODUCTION

*600mm service clearance required to a fixed surface

(**25mm from removable door or panel)

WORCESTER BOSCH GREENSTAR 12i & 24i SYSTEM

8 716 115 171a (06/2008)

SAFETY PRECAUTIONS 5

GENERAL NOTES

INTRODUCTION

+ 30mm

above elbow

200mm*

100mm**

600mm***

200mm

***

WORCESTER BOSCH GREENSTAR 12i & 24i SYSTEM

8 716 115 171a (06/2008)

BOILER CLEARANCES -

UNVENTILATED COMPARTMENT

The diagram opposite shows the

minimum space required to install and

service the boiler inside an unventilated

compartment.

** Space required for unventilated areas

with a removable door or panel.

*** 600mm clearance required to a fixed

surface for servicing.

* The boiler must have more clearance in

the unventilated compartment compared

to the ventilated compartment.

Two examples are shown opposite, refer

to the “Installation, commissioning and

servicing instruction manual” for further

information.

Do not add cupboards, shelves etc. to

restrict the space around the boiler.

VENTILATION

This is a room sealed boiler and does not

require any air for combustion from inside

the property. If the boiler is fitted into a

cupboard or a compartment is built

around the boiler 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 boiler casing, if the

clearances shown are maintained.

Do not operate the boiler 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.

CONTROLS WORCESTER BOSCH GREENSTAR 12i & 24i SYSTEM

8 716 115 171a (06/2008)

CONTROLS



To gain access to the boiler controls

push at the top of the flap and release

1. MAIN POWER ON/OFF BUTTON

2. TEMPERATURE CONTROL KNOB

3. MAINS ON/OFF INDICATOR +

FAULT DIAGNOSTIC LIGHT

4. BURNER ON INDICATOR LIGHT

(GREEN)

5. NOT APPLICABLE ON SYSTEM

BOILERS

6. FAULT RESET BUTTON

7. SYSTEM PRESSURE GAUGE

8. POSITION FOR OPTIONAL

PROGRAMMER

USING YOUR

BOILER

PUSH

OPERATING THE BOILER

WORCESTER BOSCH GREENSTAR 12i & 24i SYSTEM

8 716 115 171a (06/2008)

SWITCHING THE BOILER ON/OFF

Switching on



Switch on the boiler by pressing the

main power button.

The indicator light shows blue

Switching off



Switch off the boiler by pressing the

master switch.

The blue indicator light goes out.

SETTING THE TEMPERATURE



Turn the temperature control knob to

the desired level, approximate

temperatures for each setting are shown

in the table opposite.

When the burner is lit, the green

indicator light underneath the on/off

button is illuminated.

CONTROLLING CENTRAL HEATING



Set the timer to the correct time.



Set room thermostat to the desired

room temperature.



Set the thermostatic radiator valves to

the desired settings.

FROST PROTECTION



Leave master switch on.



Turn the temperature control to .

If the temperature falls to below 5°C

within the boiler it will periodically fire to

avoid the possibility of freezing.



If remote pipework is exposed to

low temperatures, ensure that the

installer has added a frost

thermostat.

OPERATING THE BOILER

USING YOUR

BOILER

Min --- 40°C

1--- 47°C

2--- 53°C

3--- 61°C

4--- 68°C

5--- 74°C

6--- 80°C

Max --- 82°C

OPERATING THE BOILER WORCESTER BOSCH GREENSTAR 12i & 24i SYSTEM

8 716 115 171a (06/2008)

USING YOUR

BOILER

FAULT CONDITION

In the unlikely event of a fault occurring

while the boiler is in operation:

The reset button will flash once per

second and the mains indicator (blue

light) will flash at different speeds

dependent on fault.



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 electrical power to the boiler has

been interrupted a “reset fault”

condition will exist. Reset the boiler as

described above.

If the fault remains and cannot be

cleared by pressing the reset button, or

if fault remains call:



Worcester, Bosch Group for

assistance, giving a description of

the fault and, if possible the fault

flashing sequence from the mains

indicator.

OPERATING THE BOILER

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