Worcester GREENSTAR 24i junior Bedienungsanleitung

UK/IE

USER INSTRUCTIONS

WALL HUNG RSF GAS FIRED CONDENSING COMBINATION BOILER

GREENSTAR 24i Junior/28i Junior

6720643356-00.1Wo

FOR SEALED CENTRAL HEATING SYSTEMS AND MAINS FED DOMESTIC HOT WATER

6 720 802 048 (2013/05)

The appliance is for use with Natural Gas or

L.P.G. (Cat II 2H3P type C13, C33 & C53)

Model GC Number

Natural Gas 24i Junior 47-406-54

28i Junior 47-406-56

Liquid Petroleum Gas 24i Junior 47-406-55

28i Junior 47-406-57

PREFACE

6 720 802 048 (2013/05)

PREFACE

PLEASE READ THESE INSTRUCTIONS CAREFULLY

These instructions are applicable to the Worcester, Bosch

Group boiler model stated on the front cover only.

These instructions apply in the UK/IE only and must be followed

except for any statutory obligation.

After installation please leave this User instruction Manual,

Installation, Commissioning and Servicing Instructions and

completed Benchmark Checklist with the user.

DEDICATED TO HEATING COMFORT

Thank you for purchasing a Greenstar gas-fired condensing

combination 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 over 50 years. This heritagemeans

all our products are of exceptional quality and proven

reliability.

The Greenstar range in particular is extremely energy efficient,

offering you economical running costs and value for money. It

sits in SEDBUK 2005 Band A and SEDBUK 2009 efficiency

rating of 89.1%, It 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.

CONTENTS

6 720 802 048 (2013/05)

CONTENTS

1 Symbols and safety precautions . . . . . . . . . . 4

1.1 Explanation of symbols . . . . . . . . . . . . 4

1.2 Safety precautions . . . . . . . . . . . . . . . 4

2 General Information . . . . . . . . . . . . . . . . . . . . 5

3 Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3.1 Operating the boiler . . . . . . . . . . . . . . 7

3.1.1 Setting the central heating temperature

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.1.2 Switch off the central heating . . . . . . 7

3.1.3 Boiler frost protection . . . . . . . . . . . . 7

3.1.4 Setting the hot water temperature . . 8

3.1.5 Domestic hot water pre-heat . . . . . . . 8

3.1.6 Boiler reset . . . . . . . . . . . . . . . . . . . . . 9

4 System Pressure . . . . . . . . . . . . . . . . . . . . . . 10

4.1 Sealed heating system . . . . . . . . . . . 10

4.2 Locating the integral filling link . . . . 10

4.3 Optional integral keyless filling link . 11

4.4 Optional integral keyed filling link . . 12

4.5 External filling loop . . . . . . . . . . . . . . 13

5 Service Clearances . . . . . . . . . . . . . . . . . . . . 14

6 Maintaining your Boiler . . . . . . . . . . . . . . . . 14

7 Fault Finding . . . . . . . . . . . . . . . . . . . . . . . . . 15

8 Fault or Breakdown . . . . . . . . . . . . . . . . . . . 16

9 Tips on energy saving . . . . . . . . . . . . . . . . . . 17

10 Your Guarantee . . . . . . . . . . . . . . . . . . . . . . . 18

11 Environment / disposal . . . . . . . . . . . . . . . . 18

12 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

SYMBOLS AND SAFETY PRECAUTIONS

6 720 802 048 (2013/05)

1SYMBOLSANDSAFETY

PRECAUTIONS

1.1 EXPLANATION OF SYMBOLS

WARNING SYMBOLS

Signal words indicate the seriousness of the hazard in terms of

the consequences of not following the safety instructions.

•NOTICE indicates possible damage to property or

equipment, but where there is no risk of personal injury.

•CAUTION indicates possible personal injury.

•WARNING indicates possible severe personal injury.

•DANGER indicates possible risk to life.

IMPORTANT INFORMATION

ADDITIONAL SYMBOLS

1.2 SAFETY PRECAUTIONS

IF YOU SMELL GAS!

A gas leak could potentially cause an explosion. If you smell gas,

observe the following rules.

▶Preventflamesorsparks:

–Donotsmoke,usealighterorstrikematches.

–Donotoperateanyelectricalswitchesorunplugany

equipment.

– Do not use the telephone or ring doorbells.

▶Turnoffthegasatthemeterorregulator.

▶Open windows and doors.

▶Warnyourneighboursandleavethebuilding.

▶Preventanyonefromenteringthebuilding.

▶Wellawayfromthebuilding: call the National Gas

Emergency Service on 0800 111 999.

▶L.P.G.boilers:Callthesupplier’s number on the side of the

gas tank.

BOILER OPERATION:

This boiler must only be operated by a responsible adult who

has been instructed in, understands and is aware of the boiler's

operating conditions and effects.

COMBUSTIBLE AND CORROSIVE MATERIALS:

Chemically aggressive substances can corrode the boiler and

invalidate any warranty.

▶Donotstoreoruseanycombustiblematerials(paper,

thinners, paints etc.) inside or within the vicinity of the

boiler.

FITTINGS AND MODIFICATIONS:

Only a competent engineer in accordance with the Gas Safety

(Installation and Use) Regulations can remove the outer case

and carry out any work.

▶Do not remove the outer casing.

Any misuse or unauthorised modifications to the boiler, flue or

associated components and system will invalidate the

warranty.

▶Donotmodifytheboilerorfluesysteminanyway.

Worcester, Bosch Group accepts no liability arising from any

such actions. This does not affect your statutory rights.

Safety instructions in this document are

framed and identified by a

warning triangle which is printed on a grey

background.

Notes contain important information in

cases where there is no risk of

personal injury or material losses and are

identified by the symbol shown on the left.

They are bordered by horizontal lines above

and below the text.

Symbol Meaning

▶astepinanactionsequence

areferencetoarelatedpart in the document or to

other related documents

•alistentry

– a list entry (second level)

Table 1 Symbols

GENERAL INFORMATION

6 720 802 048 (2013/05)

2 GENERAL INFORMATION

SERVICING

▶Theboilermustbeservicedregularlybyacompetent,

qualified person, such as a Worcester service engineer or

other Gas Safe registered engineer.

▶Always use original spares, to help maintain the economy,

safety and reliability of the boiler and have the Service

Record completed in the Benchmark Checklist.

The completed Benchmark Checklist will be required in the

event of any warranty work and may be required by the local

Building Control Inspector.

BENCHMARK STANDARD

The Benchmark

initiative is a code of

practice to encourage

the correct

installation,

commissioning and

servicing of domestic central heating boilers and system

equipment.

A “log book” is dispatched with every boiler. This is a vital

document that needs to be completed by the installer at the

time of installation. It confirms that the boiler has been

installed and commissioned according to the manufacturers

instructions.

The log book provides space for the recording of regular

servicing of the boiler/system and this can become a valuable

document when, for example, the householder wishes to sell

the property. The log book will show a potential purchaser that

the heating system has received regular professional attention

during its lifetime.

The Benchmark initiative aims to:

• Raise standards among professional installers

• Build and maintain high safety standards in the industry

• Improve customer satisfaction levels

•Makeacontributiontothenation‘s commitment to “Climate

Change”

Ensure that the service engineer completes the

Service Record in the Benchmark Checklist

after each service. The Benchmark Checklist

and service interval record can be found at the

rear of the Installation, Commissioning and

Servicing Instructions.

CONTROLS

6 720 802 048 (2013/05)

3 CONTROLS

▶To gain access to the boiler controls push the top centre of the flap and release.

Fig. 1 Control panel fascia

Boiler

Controls

1Central heating temperature control 6 ECO button

2Burner indicator (Green) 7 Reset button

3Service button 8 Hot water temperature control

4Cover or optional Programmer 9 System pressure gauge

5Power ON and fault indicator (Blue)

12345678

6720643356-13.1Wo

CONTROLS

6 720 802 048 (2013/05)

3.1 OPERATING THE BOILER

3.1.1 SETTING THE CENTRAL HEATING TEMPERATURE

1. Turn the central heating temperature control knob to the desired level.

Temperatures given in the figure below are approximate.

2. The Burner indicator (green) will illuminate to show that the boiler is running.

Fig. 2 Central heating temperature control

3.1.2 SWITCH OFF THE CENTRAL HEATING

1. Turn the temperature control knob to the snowflake symbol to switch off the central heating.

Fig. 3 Switch off central heating

3.1.3 BOILER FROST PROTECTION

If the temperature within the boiler falls below 8°C the pump will run to circulate water and prevent the system freezing.If the

temperature within the boiler falls below 5°C the boiler will fire periodically, bringing the boiler temperature up to 12°C to avoid the

possibility of the system freezing.This process will be repeated until such time that the boiler temperature does not drop below 5°C.

Min

Max

---

40 °C

47 °C

53 °C

61 °C

68 °C

74 °C

80 °C

82 °C

max

6720643356-05.1Wo

max

reset

eco

maxmin

6720643356-06.1Wo

CONTROLS

6 720 802 048 (2013/05)

3.1.4 SETTING THE HOT WATER TEMPERATURE

1. Turn the hot water temperature control knob to the desired level.

Fig. 4 Hot water temperature

3.1.5 DOMESTIC HOT WATER PRE-HEAT

The hot water heat exchanger is kept “pre-heated” to reduce the time taken to deliver hot water at the tap. Pre-heat is enabled by

default, during the initial boiler start up and the ECO button is not illuminated.

Eco mode is an energy saving function allowing hot water to be heated only as and when required, by running a hot tap, this OFF by

default.

1. Press and hold the Eco button for at least four seconds to enter the energy saving Eco mode, when Eco mode is active the Eco

button will be illuminated.

Fig. 5 Eco mode

max

reset

eco

maxmin

6720643356-07.1Wo

max

reset

eco

maxmin

6720643356-08.1Wo

CONTROLS

6 720 802 048 (2013/05)

3.1.6 BOILER RESET

In the event of a fault, the reset button will flash once per second and the blue mains indicator light will flash.

1. To reset the boiler press the reset button for approximately five seconds.

When the boiler resets the reset button will no longer be illuminated.

2. The mains indicator will no longer be flashing.

Fig. 6 Reset button and mains light

If the fault remains and cannot be cleared by pressing the reset button, contact Worcester, Bosch Group for

assistance.

max

reset

eco

maxmin

6720643356-09.1Wo

SYSTEM PRESSURE

6 720 802 048 (2013/05)

4SYSTEMPRESSURE

4.1 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 indicated on the pressure gauge.

▶Checkregularlythatthepressureismaintained.

▶Ifthepressuregaugereadslessthan1bar then the system requires re-charging.

▶Contactyourinstallerormaintenanceengineerifapermanentsignificant decrease or increase in pressure is indicated on the

pressure gauge.

The filling method will be one of three types:

•Optional“Keyless”integralfillinglink

•Optional“Keyed”integral filling link

•Anexternalfillingloop,fitted valves and flexible hose.

4.2 LOCATING THE INTEGRAL FILLING LINK

To remove bottom panel:

1. Push the panel back fully to release the front edge

2. Pull forward and down to remove

Fig. 7 Remove the bottom panel

Fig. 8 Integral filling link location

1. 6720806709-01.1Wo

67206800521-02.2Wo

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