Buderus 600 - 11S Installation And Servicing Instructions
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Buderus 600 - 11S Installation And Servicing Instructions

Buderus 600 - 11S Installation And Servicing Instructions

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7209 6700 - 05/2004 GB(EN)
For trade use
Installation and servicing
instructions
Wall-mounted condensing gas boiler
600 - 11S / 19S / 24S / 24C
Please read thoroughly before installing or servicing

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  • Page 1: Installation And Servicing Instructions

    7209 6700 - 05/2004 GB(EN) For trade use Installation and servicing instructions Wall-mounted condensing gas boiler 600 - 11S / 19S / 24S / 24C Please read thoroughly before installing or servicing...
  • Page 2 If you have suggestions for improvement or have found discrepancies, please do not hesitate to contact us. Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and servicing instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...

  • Page 3: Table Of Contents

    REMEMBER : Please hand the log book back to the user. Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...

  • Page 4: Regulations And Directives

    Defects and faults must be eliminated immediately. CAUTION Use this device for its intended purpose only. Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 5 Unsuitable heating water promotes sludge formation and corrosion. This may cause malfunctions and damage in the heat exchanger. Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...

  • Page 6: Installation

    Pressure relief valve R¾" (¾" - ½"-adapter supplied with boiler) NOTE See wall-mounting template for the necessary clearances. Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...

  • Page 7: Boiler Assembly - Exploded View

    60. Spring set 81. Hot surface ignitor 52. O-ring 61. Connection house by-pass 82. Ionisation electrode Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 8 76. Flow regulator 59. Pressure relief valve 68. By-pass pipe 77. Three-way valve body Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...

  • Page 9: Flue Installation

    Table 1 Balanced flue terminal position Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 10 Concentric bend 90° NE 83705 Concentric bend 45° NE 83706 Table 3 Additional flue parts Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...

  • Page 11: Items Supplied With Unit

    If the boiler isn't connected to the pipework Fig. 5 Installation immediately, place caps on the pipe connections. Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...

  • Page 12: Water Circulation System

    10 bar cannot be exceeded. Connect pipes free of tension (fig. 6). Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 13 (unplasticized polyvinyl chloride), BS (acrylonitrile- butadienestyrene), PP (polypropylene polyprolene) or PVC-C (cross-linked polyvinyl chloride). Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 14 External termination of condensate drainage pipe via internal discharge branch (e.g. sink waste – proprietary fitting) and condensate siphon Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...

  • Page 15: Flue Installation

    Fig. 12 Elbow with flue gas testing point Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 16 Fig. 16 Flue terminal position Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...

  • Page 17: Electrical Connections

    The electrical supply for both the boiler and the system must be taken from the same sparred fused spur outlet. Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...

  • Page 18: 1.10 Wiring Diagram

    Installation 1.10 Wiring Diagram Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 19 20, item 1. Fig. 20 Connection box in burner-control unit - 230V connection Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 20 Open plug (fig. 23, item 4) connection. Connect underfloor heating header thermostat (volt free) and in series. Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 21 Note that example systems are to be regarded as schematic representations only. Fig. 24 System example Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...

  • Page 22: Initial Start-Up

    Fig. 27 Connecting temporary hose Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 23 The product must be certified as a gas leak-testing agent. DO NOT allow the product to come into contact with electrical wiring. Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 24 Inscription on gas- type indicating label: 3P G 31_30-50 mbar Table 4 Gas-supply types Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 25 3: Heat-capacity jumper 4: Heating capacity knob 5: Hot-water temperature knob 6: Green blocking plate Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 26 20.8 20.8 10.3 18.0 22.4 22.4 11.0 19.0 24.0 24.0 Table 7 Heating capacity Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 27 ) should total -5 Pa (±5 Pa) (display on measuring gauge: -10 Pa to 0 Pa). Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 28 Enter the reading on the report form. Disconnect the system from the power supply. Fig. 39 Measuring the ionisation current Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 29 A comprehensive service should be carried out annually. Stress the importance of regular servicing by a Corgi registered installer. Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...

  • Page 30: Inspection

    For further information, please refer to subsection 8.2 "Inspection and maintenance reports" on page 66 and fill out the Benchmark. Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...

  • Page 31: Maintenance

    (fig. 42, item 2). Fig. 42 Remove burner gasket and rubber seal Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 32 CAUTION Check the heat-exchanger for leaks BEFORE reassembling the casing shells. Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 33 Fig. 47 Remove burner and release retaining clips Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 34 Fig. 50 Refitting the heat exchanger the right way round. The upper securing-pin groove must be horizontal. Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...

  • Page 35: Flushing Out The Hot-Water Heat Exchanger

    Open hot-water tap (e.g. at washbasin) and thoroughly flush out system. Turn mains power switch to “I”. Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...

  • Page 36: Servicing

    Service mode Buderus 600 - 11S/19S/24S/24C running in hot-water mode Normal hot water mode Reset Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...

  • Page 37: Fault Codes

    External domestic hot water tank is too small for the Top up the system (see subsection 2.1.1) heating capacity Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 38 Boiler is in operation for DHW due to a dripping faucet Check for dripping faucets Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 39 UBA might be faulty Check the UBA by temporarily connecting a different UBA (see subsection 5.3.3) Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 40 – Press reset. If fault code remains than try to temporarily connect a different UBA (see subsection 5.3.3) Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 41 Check the earthing cable connections (yellow/green wire) Ionisation electrode may be faulty Check the cabling on the ionisation electrode Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 42 – Check if the are any peaks in the electrical network caused by maybe windmills or a power generator Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 43 – Check if the are any peaks in the electrical network caused by maybe windmills or a power generator Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 44 – Check all the wiring – Check the UBA and replace if necessary (see subsection 5.3.3) Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...

  • Page 45: Checking And Replacing Parts

    Loosen crosshead screw (fig. 54, item 1) on UBA housing. Swivel UBA housing downwards. Fig. 54 Swivel UBA housing downwards Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 46 UBA or UBA. Fig. 57 Checking the fan Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 47 Fig. 60 Replacing the fan on the 600 Series: remove the gas connection unit Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 48 Swivel the UBA housing upwards and screw into place. Connect system to mains power supply. Fig. 63 Checking the mains supply Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 49 Fig. 65 600 - 11S / 19S / 24S / 24C: checking the pump Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 50 Disconnect the system from the power supply. Shut the servicing valve. Drain the 600 - 11S / 19S / 24S / 24C as per the "Installation and Servicing Instructions". Loosen the screw on the terminal box (fig. 66, item 2) of the pump and open the terminal box.
  • Page 51 Servicing 5.3.12 Replacing the safety sensor Shut the servicing valve. Drain the 600 - 11S / 19S / 24S / 24C as per the "Installation and Servicing Instructions". Loosen the plug-in connection (fig. 68, item 1). Unscrew the sensor (fig. 68, item 2) and replace with a new unit.
  • Page 52 Servicing 5.3.15 Replacing the flow sensor Shut the servicing valve. Drain the 600 - 11S / 19S / 24S / 24C as per the "Installation and Servicing Instructions". Loosen the plug-in connection (fig. 71, item 1). Unscrew the sensor (fig. 71, item 2) and replace with a new unit.
  • Page 53 10,000 20,000 30,000 40,000 50,000 60,000 70,000 80,000 Fig. 75 Outside temperature sensor diagram Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 54 Refit insulation and corresponding mounting elements. Plug cable connection in once more. Open servicing valves. Fill the 600 - 11S / 19S / 24S / 24C and purge the system of air as indicated in the installation and servicing instructions.
  • Page 55 “7”, press the service button to display “c”. Press the "reset" button. The display shows “r”. Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 56 Remove bayonet connector by twisting anticlockwise. Remove regulating motor. Set the mains switch to “I” and press the “reset” button. Once the 600 - 11S / 19S / 24S / 24C is in operation, open one of the hot-water taps. The UBA displays "...
  • Page 57 Servicing 5.3.24 Replacing the motorised valve body control valve Shut the servicing valve and drain the 600 - 11S / 19S / 24S / 24C as per the "Installation and Servicing Instructions". Dismantle condensate trap. Remove protective cap from three-way valve.
  • Page 58 Note order of cable terminals. Loosen all cables. Connect the cables, in the right order, to the new terminal strip. Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 59 This is not a serviceable part and any fault identified with this component, contact Boulter Buderus. Fig. 88 KIM connections Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...

  • Page 60: Changing To Another Type Of Gas

    Turn air suction tube and pull off from below. Fig. 91 Remove safety plate Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 61 Include all seal areas concerned during mounting in the gas-tightness check when in operation. Refit all covers. Fig. 94 Place new stickers Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...

  • Page 62: Appendix

    Adjustable hot water temperature °C 40 - 60 Minimum connection pressure 0.75 Maximum connection pressure Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 63 Height x Width x Depth 850 x 480 x 370 Weight (without casing) Casing Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...

  • Page 64: Short List Of Spare Parts

    38092 Cable duct 38463s Ventilation cover seal 38456 Pipe duct 38462s Sealing ring 73561 Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...

  • Page 65: Reports

    13. Confirm initial start-up Confirmation of initial start-up by qualified service technician (Company stamp, signature) Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...

  • Page 66: Inspection And Maintenance Reports

    15. Confirm inspection carried out by qualified service engineer and fill out the Benchmark Company stamp / Date / Signature) Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 67 _____________ mbar _____________ mbar _____________ mbar _____________ mbar _____________ mbar _____________ mbar _____________ mbar Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 68 Confirm servicing work Confirmation of servicing carried out by qualified technician Company stamp, signature) Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 69 ___________________ ___________________ ___________________ ___________________ ____________________ ____________________ ____________________ ____________________ ____________________ ____________________ ____________________ ____________________ ____________________ ____________________ Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 70 Notes Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 71 Notes Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004...
  • Page 72 Heating system specialist: Boulter Buderus Ltd. Magnet House 30 Whitehouse Road Ipswich Suffolk, IP1 5JA Telephone: 01473 241555 Fax: 01473 241321/463411 http://www.boulter-buderus.co.uk e-mail: info@boulter-buderus.co.uk...

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