Bosch Worcester GREENSTAR 12i System Instruction Manual
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Bosch Worcester GREENSTAR 12i System Instruction Manual

Bosch Worcester GREENSTAR 12i System Instruction Manual

Wall hung rsf gas-fired condensing boiler for sealed central heating systems and indirect fed dometic hot water
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THE APPLIANCE IS FOR USE WITH
NATURAL GAS OR L.P.G. (Cat II 2H3P TYPE C13 & C33)
NATURAL GAS:
WORCESTER GREENSTAR 12i System GC NUMBER 41-311-67
WORCESTER GREENSTAR 24i System GC NUMBER 41-311-68
LIQUID PETROLEUM GAS:
WORCESTER GREENSTAR 12i System GC NUMBER 41-311-69
WORCESTER GREENSTAR 24i System GC NUMBER 41-311-70
GB/IE

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  • Page 1 THE APPLIANCE IS FOR USE WITH NATURAL GAS OR L.P.G. (Cat II 2H3P TYPE C13 & C33) NATURAL GAS: WORCESTER GREENSTAR 12i System GC NUMBER 41-311-67 WORCESTER GREENSTAR 24i System GC NUMBER 41-311-68 LIQUID PETROLEUM GAS: WORCESTER GREENSTAR 12i System GC NUMBER 41-311-69...
  • Page 2 THIS APPLIANCE MUST BE INSTALLED BY A COMPETENT PERSON. FAILURE TO INSTALL CORRECTLY COULD LEAD TO PROSECUTION. IF YOU ARE IN ANY DOUBT CONTACT THE WORCESTER BOSCH TECHNICAL HELPLINE. WATER TREATMENT: DISTANCE LEARNING AND TRAINING COURSES ARE AVAILABLE FROM WORCESTER...

  • Page 3: Table Of Contents

    FAULT FINDING & DIAGNOSIS FAULT FINDING CH FUNCTION PROTECTION FUNCTION ADDITIONAL INSTRUCTIONS FOR FITTING OPTIONAL DIVERTER VALVE CAN BE FOUND AT THE REAR OF THIS MANUAL INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System CONTENTS 8 716 107 375a (02/05)

  • Page 4: Safety Precautions & Symbols

    IMPORTANT - The service engineer must complete the Service Record on the Benchmark Checklist after each service. INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System SAFETY PRECAUTIONS 8 716 107 375a (02/05)

  • Page 5: General Information

    Combustion air fan with speed regulator CH temperature sensor & control Pump anti-seizure protection Flue gas temperature limiter Condensate trap & syphon INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System GENERAL INFORMATION 8 716 107 375a (02/05)

  • Page 6: Technical Data

    44.4 44.4 44.4 44.4 Total boiler weight 39.5 39.5 39.5 39.5 Lift weight 27.1 27.1 27.1 27.1 SEDBUK 90.1 90.2 91.4 92.0 INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System TECHNICAL DATA 8 716 107 375a (02/05)

  • Page 7: Layout & Components

    29 PUMP 30 SYSTEM PRESSURE GAUGE 31 CONTROL PANEL IN SERVICE POSITION 32 HEAT EXCHANGER 33 ACCESS COVER FOR TRANSFORMER & INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System LAYOUT & COMPONENTS 8 716 107 375a (02/05)

  • Page 8: Layout & Components

    49 NOT USED 50 FAULT RESET BUTTON 51 SYSTEM PRESSURE GAUGE 52 POSITION FOR OPTIONAL PROGRAMMER 53 INTERNAL BYPASS WITHIN PLASTIC MOULDING INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System LAYOUT & COMPONENTS 8 716 107 375a (02/05)

  • Page 9: Cleaning Primary Systems

    5 Drain and thoroughly flush the system to remove the flushing agent and debris. Valve Flushing Agent INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System CLEANING PRIMARY SYSTEMS 8 716 107 375a (02/05)

  • Page 10: Mains Supply

    INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System MAINS SUPPLY 8 716 107 375a (02/05)

  • Page 11: Water Systems & Pipework

    • Do not use galvanised pipes or radiators. INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System WATER SYSTEMS & PIPEWORK 8 716 107 375a (02/05)

  • Page 12: Condensate Pipework

    H - Ground level J - Drainage holes 50mm from base of tube (12mmØ at 25mm centres) facing away from building K - Limestone chippings INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System CONDENSATE PIPEWORK 8 716 107 375a (02/05)

  • Page 13: Pressure Relief Pipework

    (as shown) to help prevent hazard. L - Outside wall O,M - Drain pipe N - External drain INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System PRESSURE RELIEF PIPEWORK 8 716 107 375a (02/05)

  • Page 14: Boiler Location & Clearances

    INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System BOILER LOCATION & CLEARANCES 8 716 107 375a (02/05)

  • Page 15: Boiler Location & Clearances

    Electrical switches, fused spur and socket out let s must not be sit uat ed in t he bathroom. INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System BOILER LOCATION & CLEARANCES 8 716 107 375a (02/05)

  • Page 16: Plumbing Manifold

    ADDITIONAL INFORMATION section at the back of this book. Flow 22mm Return 22mm Mains Gas Supply 22mm INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System PLUMBING MANIFOLD 8 716 107 375a (02/05)

  • Page 17: Flue Terminal Positions

    2 Not recommended. See instructions supplied with vertical flue kits. INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System FLUE TERMINAL POSITIONS 8 716 107 375a (02/05)

  • Page 18: Flue Options

    Vertical 80/125mm: 1365mm to top of terminal Ø125 - 11000mm (including terminal) B x 13 + C x 2 + E x 1 INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System FLUE OPTIONS 8 716 107 375a (02/05)

  • Page 19: Installation

    2. Remove template (F) and wall mounting frame (E) from the packaging. 3. Remove boiler bottom panel (D) and installer pack (C). INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System UNPACKING WALL FRAME AND 8 716 107 375a (02/05) ANCILLARY ITEMS...

  • Page 20: Wall Mounting Template / Flue Opening

    Allow for a rise of 52mm per metre length of flue, to give a 3° angle. Clear any debris from the site. INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System WALL MOUNTING PLATE FLUE OPENING 8 716 107 375a (02/05)

  • Page 21: Unpacking The Appliance

    See “OPTIONAL DIVE RTE R VALVE” Sect ion in t hese inst ruct ions or t he instructions supplied with the optional diverter valve kit. INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System UNPACKING THE APPLIANCE 8 716 107 375a (02/05)

  • Page 22: Boiler Connections

    UP until the stop on the inside of the handle is over the shoulder of the metal bracket to secure in place. Stop in locked position INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System BOILER CONNECTIONS 8 716 107 375a (02/05)

  • Page 23: Boiler Connections

    8. Connect the pressure relief drain pipe to 15mm compression joint (H) using the nut and olive supplied in the hardware literature pack. 22mm 22mm 22mm INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System BOILER CONNECTIONS 8 716 107 375a (02/05)

  • Page 24: Flue Installation

    After cutting, the end must be square and free from burrs to prevent damage to the flue seals. (250mm min) Turret Clamp Flue INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System FLUE INSTALLATION 8 716 107 375a (02/05)
  • Page 25 In the example shown using a flue extension with 2 bends will achieve a total length of 1148mm. INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System FLUE INSTALLATION 8 716 107 375a (02/05)
  • Page 26 • The flue is set at an angle of 3° or 52mm per 1m length. Flat at back This screw should be fitted last for easier installation when rear exit INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System FLUE INSTALLATION 8 716 107 375a (02/05)

  • Page 27: Condensate Connection

    SIONING CHECKS and refer to the cor- rect versions that follow FITTING THE DIVE RTE R VALVE in the ADDITIONAL INFORMATION section at the back of this book. INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System CONDENSATE CONNECTION 8 716 107 375a (02/05)

  • Page 28: Electrical

    This option is also covered in the Fault Finding Guide on page 54 of these instructions. INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System ELECTRICAL 8 716 107 375a (02/05)

  • Page 29: Position Of Wired Components

    POSITION OF WIRED COMPONENTS INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System POSITION OF WIRED COMPONENTS 8 716 107 375a (02/05)

  • Page 30: Pre-Commissioning Checks

    4 Check pressure relief drain pipe (H) is correctly fitted and securely tightened. 22mm 22mm 22mm INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System PRE-COMMISSIONING CHECKS 8 716 107 375a (02/05)

  • Page 31: Filling The System

    8 Rotate the adjustable pointer on the pressure gauge to record the set system pressure. 9 Isolate and remove filling loop connection to system. INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System FILLING THE SYSTEM 8 716 107 375a (02/05)

  • Page 32: Starting The Appliance

    To reset press and hold the reset button (E) for 2 seconds. The boiler will be reset. CAUTION: DO NOT PRESS POWER INDICATOR (B) TO RESET BOILER. INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System STARTING THE APPLIANCE 8 716 107 375a (02/05)

  • Page 33: Water Treatment

    * compatible with aluminium. The pH Agent value of the system water must be less than 8 or the appliance guarantee will be invalidated. Inhibitor INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System WATER TREATMENT 8 716 107 375a (02/05)

  • Page 34: Commissioning

    E - Reset button F - Service button G - Not used Inlet Test Nipple H - System pressure gauge I - Cover or optional programmer INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System COMMISSIONING 8 716 107 375a (02/05)

  • Page 35: Finishing Commissioning

    If the appliance is unused and exposed to freezing conditions, shut off all the mains supplies and drain the system and boiler. INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System FINISHING COMMISSIONING 8 716 107 375a (02/05)
  • Page 36 Commissioning. Operate the appliance and take note of any irregularities. Refer to Fault Finding for rectification procedures. INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System INSPECTION AND SERVICE 8 716 107 375a (02/05)
  • Page 37 24i System - 3. 1 mbar 24i System - 4. 1 mbar Pressures measured below these figures will indicate that the heat exchanger will require cleaning. INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System INSPECTION AND SERVICE 8 716 107 375a (02/05)

  • Page 38: Inspection And Service

    There is a special accessory kit available specifically designed for cleaning the heat exchanger. If required order 7 716 192 312. INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System INSPECTION AND SERVICE 8 716 107 375a (02/05)
  • Page 39 3.3 Remove siphon Siphon The siphon body is transparent so contents can be examined for any blockage. If necessary flush with clean water. INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System INSPECTION AND SERVICE 8 716 107 375a (02/05)
  • Page 40 (J). Remove clamping plate (K). Remove spark/flame electrode assembly from boiler. Remove seal from the top of the heat exchanger INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System INSPECTION AND SERVICE 8 716 107 375a (02/05)
  • Page 41 BETWEEN THE AIR/GAS MANIFOLD AN D TH E H EAT E XCHANG E R I S DISTURBED THE SEALING GASKET MUST BE REPLACED. INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System INSPECTION AND SERVICE 8 716 107 375a (02/05)

  • Page 42: Replacement Of Parts

    Note: It is essential that the mating surface of the thermostat is coated with heat conductive paste. 4. Flue overheat thermostat Remove electrical connections. Unscrew thermostat from flue. INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System REPLACEMENT OF PARTS 8 716 107 375a (02/05)
  • Page 43 8.1 Undo plastic nut (E) on the siphon outlet. Drop condensate tube away from siphon. 8.2 Remove hose (F). 8.3 Remove siphon. INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System REPLACEMENT OF PARTS 8 716 107 375a (02/05)
  • Page 44 Remove 5 screws (C) retaining the rear panel of the control and remove panel. Pull transformer upwards from PCB. INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System REPLACEMENT OF PARTS 8 716 107 375a (02/05)
  • Page 45 IS RE-FITTED TO THE NEW CONTROL. IF THIS IS NOT DONE 12.2 THE BOILER WLL INDICATE ERROR AND WILL NOT FUNCTION. 12.3 INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System REPLACEMENT OF PARTS 8 716 107 375a (02/05)
  • Page 46 I M PORTANT: E N S U R E TU B E I S REFITTED TO PRESSURE SWITCH 14.1 14.2 14.3 INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System REPLACEMENT OF PARTS 8 716 107 375a (02/05)
  • Page 47 Pull heat exchanger assembly up to clear. Reassemble and check combustion as stated in the gas conversion section. 18.4 18.2 18.3 18.1 INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System REPLACEMENT OF PARTS 8 716 107 375a (02/05)
  • Page 48 21.2 Lift the air vent (C) out of the housing and remove. To refit, follow the above in reverse. 21.1 21.2 INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System REPLACEMENT OF PARTS 8 716 107 375a (02/05)
  • Page 49 24.2 Withdraw the drain tap from its housing To refit, follow the above in reverse. Ensure any seals that have been disturbed are renewed. 24.1 24.2 INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System REPLACEMENT OF PARTS 8 716 107 375a (02/05)
  • Page 50 26.2 Withdraw the pressure release valve (A) from its housing. To refit, follow the above in reverse. Ensure any seals that have been disturbed are renewed. 26.1 26.2 INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System REPLACEMENT OF PARTS 8 716 107 375a (02/05)
  • Page 51 Gently raise the boiler off the mounting frame. Replace expansion vessel and refit the boiler to the mounting frame. Follow the commissioning procedure in this manual. INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System REPLACEMENT OF PARTS 8 716 107 375a (02/05)

  • Page 52: Setting The Gas /Air Ratio

    Fit new label from kit over existing label on the system must only be run in central appliance bottom panel. heating mode. INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System REPLACEMENT OF PARTS 8 716 107 375a (02/05)

  • Page 53: Short Parts List

    WORCESTER Part No. 8 716 106 431 0 H09 750 GC No. 18 Expansion vessel WORCESTER Part No. 8 716 105 545 0 H05 206 GC No. INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System REPLACEMENT OF PARTS 8 716 107 375a (02/05)

  • Page 54: L.p.g Conversion

    P R O C E D U R E C AN B E F O U N D I N THE REPLACEMENT PARTS SECTION OF THIS MANUAL. INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System L.P.G CONVERSION 8 716 107 375a (02/05)

  • Page 55: L.p.g. Conversion

    P R O C E D U R E C AN B E F O U N D I N 24kW NG THE REPLACEMENT PARTS SECTION 24kW LPG OF THIS MANUAL. INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System L.P.G CONVERSION 8 716 107 375a (02/05)

  • Page 56: Fault Finding & Diagnosis

    FAULT FINDING NOTE : This fault finding information is for guidance only. Worcester Bosch 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.

  • Page 57: Ch Function

    CENTRAL HEATING and DHW FUNCTIONS in the ADDITIONAL INFORMATION section at the back of this book. INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System BOILER FUNCTION 8 716 107 375a (02/05)

  • Page 58: Protection Function

    PROTECTION FUNCTION Boiler temperature Run autofroststat below 8°C function Pump run 5 seconds Pump antiseize every 24hrs INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System PROTECTION FUNCTION 8 716 107 375a (02/05)
  • Page 59 THE APPLIANCE IS FOR USE WITH NATURAL GAS OR L.P.G. (Cat II 2H3P TYPE C13 & C33) NATURAL GAS: WORCESTER GREENSTAR 12i System GC NUMBER 41-311-67 WORCESTER GREENSTAR 24i System GC NUMBER 41-311-68 LIQUID PETROLEUM GAS: WORCESTER GREENSTAR 12i System GC NUMBER 41-311-69...
  • Page 60 IN STR UCTION S PAG E 16 TO CONTINUE INSTALLATION. Flow 22mm Mains Gas CH Return 22mm Supply 22mm Cylinder Return 15mm INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System PLUMBING MANIFOLD 8 716 107 375a (02/05)
  • Page 61 Re-tighten the clamping plate by re-tightening the two screws (B) as shown in fig: 2. • 4.1 On completion the pipe assembly should look as shown. INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System BOILER CONNECTIONS 8 716 107 375a (02/05)
  • Page 62 UP until the stop on the inside of the handle is over the shoulder of the metal bracket to secure in place. Stop in locked position INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System BOILER CONNECTIONS 8 716 107 375a (02/05)
  • Page 63 NOW R ETU R N TO TH E MAIN INSTRUCTIONS PAGE 23 (FLUE INSTALLATION) TO CONTINUE INSTALLATION. 22mm 22mm 15mm 22mm INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System BOILER CONNECTIONS 8 716 107 375a (02/05)
  • Page 64 12kW i System Kit: 12i System NATURAL GAS 112 12i System LPG 24kW i System Kit: 24i System NATURAL GAS 114 24i System LPG INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System BOILER CONNECTIONS 8 716 107 375a (02/05)
  • Page 65 10 Diverter valve motor (ST17): Connect electrical harness from diverter valve motor to ST17 (see following page). INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System ELECTRICAL 8 716 107 375a (02/05)
  • Page 66 POSITION OF WIRED COMPONENTS INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System POSITION OF WIRED COMPONENTS 8 716 107 375a (02/05)
  • Page 67 I N STR UC TION S PAG E ( F I LLI NG TH E SYSTE M ) TO CONTINUE INSTALLATION. 22mm 22mm 15mm 22mm INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System PRE- COMMISSIONING CHECKS 8 716 107 375a (02/05)
  • Page 68 CENTRAL HEATING FUNCTION INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System CENTRAL HEATING FUNCTION 8 716 107 375a (02/05)
  • Page 69 DHW FUNCTION R ETU R N TH E MAI N INSTRUCTIONS PAGE 57 FOR PROTECTION FUNCTION. INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System DHW FUNCTION 8 716 107 375a (02/05)
  • Page 70 INSTALLATION, COMMISSIONING & SERVICING EXCELLENCE COMES AS STANDARD Worcester, Bosch Group Cotswold Way, Warndon, Worcester WR4 9SW. Tel. 01905 754624 Fax. 01905 754619 Worcester, Bosch Group is a trading name of BBT Thermotechnology UK Ltd. www.worcester-bosch.co.uk 8 716 107 375a (02.05)

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