Manuals / Bosch Appliances / Household Appliance / Boiler

Bosch Appliances 24i junior, 28i junior manual General Information, B 700mm D C, Appliance

Models: 28i junior 24i junior

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(When fitted to wall frame)

Depth to wall

330mm

400mm

GENERAL INFORMATION

STANDARD PACKAGE:

A - Wall hung gas fired condensing combi boiler for central heating and domestic hot water

B - Boiler support frame

C- Hardware literature pack D - Bottom Panel

B

700mm

SPECIFICATIONS:

Pre-wired and pre-plumbed

Galvanised steel inner frame

Digital control system

Automatic ignition

Direct burner ignition electrodes

DBuilt-in frost thermostat

Built-in fault finding diagnostics

Modulating automatic gas valve

Combustion air fan with speed regulator

CH temperature sensor & control

Pump anti-seizure protection

Flue gas temperature limiter

Condensate trap & syphon

DHW flow sensor

Plate type DHW heat exchanger

APPLIANCE

INFORMATION

INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR 24 i junior/28 i junior 8 716 107 336b (11/05)

GENERAL INFORMATION

Page 5

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Bosch Appliances 24i junior manual General Information, When fitted to wall frame Depth to wall 330mm 400mm, B 700mm D C

Contents

GB/IE CHECKLIST & service interval record, printed within this manualINSTALLATION & SERVICING INSTRUCTIONS INSTALLATION & SERVICING INSTRUCTIONSSTORE THE APPLIANCE IN A DRY AREA PRIOR TO INSTALLATION PLEASE READ THESE INSTRUCTIONS CAREFULLY BEFORE STARTING INSTALLATIONCONTENTS CONTENTSSAFETY & REGULATIONS PRE-INSTALLATIONINSTALLATION REGULATIONS SAFETY PRECAUTIONSDON’T TURN ELECTRICAL SWITCHES ON OR OFF SAFETY PRECAUTIONS INSTALLATION REGULATIONSGENERAL INFORMATION When fitted to wall frame Depth to wall 330mm 400mmB 700mm D C GENERAL INFORMATIONTECHNICAL DATA TECHNICAL DATAAPPLIANCE INFORMATIONLAYOUT & COMPONENTS LAYOUT & COMPONENTSAPPLIANCE INFORMATIONLAYOUT & COMPONENTS LAYOUT & COMPONENTSAPPLIANCE INFORMATIONCLEANING PRIMARY SYSTEMS CLEANING PRIMARY SYSTEMSMAINS SUPPLY INSTALLATION PREMAINS SUPPLY WATER SYSTEMS & PIPEWORK COMMISSIONING INSTALLATIONWATER SYSTEMS & PIPEWORK CONDENSATE PIPEWORK PRE - INSTALLATIONCONDENSATE PIPEWORK PRESSURE RELIEF PIPEWORK PRE - INSTALLATIONPRESSURE RELIEF PIPEWORK Ventilation Free Compartments Installation Clearances VENTILATION FREE COMPARTMENTS INSTALLATION CLEARANCESSERVICING CLEARANCES VENTED COMPARTMENT If Side Clearances are ReducedPRE - INSTALLATION See IEE wiring regulationsBOILER LOCATION CLEARANCESPLUMBING MANIFOLD INSTALLATION PREPLUMBING MANIFOLD FLUE TERMINAL POSITIONS PRE - INSTALLATIONThe flue should not penetrate the shaded area FLUE TERMINAL POSITIONSFLUE OPTIONS PRE - INSTALLATIONFLUE OPTIONS ANCILLARY ITEMS INSTALLATIONUNPACKING WALL FRAME AND ANCILLARY ITEMS WALL MOUNTING TEMPLATE FLUE OPENING INSTALLATIONWALL MOUNTING PLATE FLUE OPENING COMMISSIONINGUNPACKING THE APPLIANCE INSTALLATIONCAUTION Caps fitted to pipes must be removed before hanging the boilerAND OBSERVE ALL RELEVANT SAFETY PRECAUTIONS INSTALLATIONBOILER CONNECTIONS Do not lift by thePRECAUTIONS AND OBSERVE ALL RELEVANT SAFETYINSTALLATION BOILER CONNECTIONSFLUE INSTALLATION FLUE INSTALLATIONINSTALLATION WALLFLUE INSTALLATION FLUE INSTALLATIONINSTALLATION ONLY CUT EXTENDED FLUE LENGTHSFLUE INSTALLATION FLUE INSTALLATIONINSTALLATION A - Standard Flue B - Internal Wall Seal C - External Wall SealCONDENSATE CONNECTION INSTALLATIONCONDENSATE CONNECTION ELECTRICS INSTALLATIONELECTRICS COMMISSIONING INSTALLATION POSITION OF WIRED COMPONENTSPOSITION OF WIRED COMPONENTS PRE-COMMISSIONING RELEVANT SAFETY PRECAUTIONSCHECKS A D C E BCOMMISSIONING FILLING THE SYSTEMFILLING THE SYSTEM STARTING THE APPLIANCE CAUTION DO NOT PRESS POWER INDICATOR B TO RESET BOILERSTARTING THE APPLIANCE COMMISSIONINGWATER TREATMENT COMMISSIONING NO ADJUSTMENT IS REQUIRED IF THE GAS INLET PRESSURE IS CORRECTCOMMISSIONING COMMISSIONINGCOMMISSIONING FINISHING COMMISSIONINGFINISHING COMMISSIONING INSPECTION AND SERVICE INSPECTION AND SERVICEInspection ANY O -RING OR GASKET THAT APPEARS DAMAGED MUST BE REPLACEDComponent Access 1.2 INSPECTION AND SERVICE2. Adjusting boiler control to service positionSetting Boiler to Maximum INSPECTION AND SERVICEINSPECTION AND SERVICE SERVICINGTo Clean the Heat Exchanger INSPECTION AND SERVICEINSPECTION AND SERVICE IMPORTANT IF THE JOINTINSPECTION AND SERVICE INSPECTION AND SERVICESERVICING SPARESQ Small tab INSPECTION AND SERVICEL M N Re-assemble ensuring that the lower baffleREPLACEMENT OF PARTS REPLACEMENT OF PARTS1. Removing outer case 2. Primary sensor5. Moving boiler control to service position REPLACEMENT OF PARTS7. Gas adjuster REPLACEMENT OF PARTS9. Access to boiler control components REPLACEMENT OF PARTSREPLACEMENT OF PARTS 10. PCB fuseREPLACEMENT OF PARTS REPLACEMENT OF PARTSERROR AND WILL NOT FUNCTION 12.1assembly 13.1 REPLACEMENT OF PARTS14. Pressure switch Pressure switch Fan Electrode assembly Burner Heat exchanger16. Electrode assembly REPLACEMENT OF PARTSREPLACEMENT OF PARTS 15.1REPLACEMENT OF PARTS REPLACEMENT OF PARTS19.1 20.1housing and filter REPLACEMENT OF PARTSREPLACEMENT OF PARTS 23.1REPLACEMENT OF PARTS REPLACEMENT OF PARTS28.1 28.2REPLACEMENT OF PARTS REPLACEMENT OF PARTS30.2 29.1Expansion vessel replacement REPLACEMENT OF PARTSREPLACEMENT OF PARTS 31.133. Setting the CO2 SETTING THE GAS / AIR RATIOREPLACEMENT OF PARTS Note When running in the service mode, theREPLACEMENT OF PARTS SHORT PARTS LIST1112 1415 1718 2021 2324 SERVICING SPARES3. Gas adjuster 1. Moving boiler control to service positionL. P. G. CONVERSION 2. Gas valveLockout reset FAULT FINDINGFault Possible solution/checkIGNITION SEQUENCE FAULT FINDING DIAGRAMSCENTRAL HEATING FUNCTION CENTRAL HEATING FUNCTIONIGNITION SEQUENCE FAULT FINDING DIAGRAMSPREHEAT AND DHW FUNCTION PREHEAT AND DHW FUNCTIONDIAGRAMS FAULT FINDINGPROTECTION FUNCTION PROTECTION FUNCTIONGAS BOILER COMMISSIONING CHECKLIST SERVICE INTERVAL RECORD Greenstar 24i Junior/28i Junior Pack NumberHardware/Literature Pack INSTALLATION, COMMISSIONING & SERVICING