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Baxi Duo-tec Combi GA Pocket Technical Manual

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For all enquiries, please call
0844 871 1525
Email: info@baxi.co.uk
Visit: www.baxi.co.uk
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Baxi, Brooks House, Coventry Road, Warwick CV34 4LL
www.baxi.co.uk
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Summary of Contents for Baxi Duo-tec Combi GA

  • Page 1 Please recycle this Brochure when you have finished with it. Baxi policy is one of continual improvement and development. The right to change specification and appearance without prior notice is reserved. The reproduction of colours is as accurate as photographic and printing processes allow.
  • Page 2 For more information please contact your Area Sales Manager or alternatively, give us a call on 0844 871 1525 or email info@baxi.co.uk. Our comprehensive website www.baxi.co.uk is also a good resource for any answers to technical queries. We hope you find this technical guide useful. However, should should you have any specific questions then please do not hesitate to get in touch.

  • Page 3: Table Of Contents

    Overview of the range Useful information Efficiency ratings Sales order codes Flue terminal positioning 10-13 The Baxi range of boilers Duo-tec Combi GA 14-21 Flue groups, technical specifications & control options Neta-tec Combi GA 22-29 Flue groups, technical specifications & control options...

  • Page 4: History Of Baxi

    Baxi Duo-tec Combi GA that set new standards in efficiency and reliability. As for reliability, you can take it for granted with Baxi boilers. They’re designed to operate at maximum efficiency throughout their lifetime, and tested rigorously for your peace of mind.

  • Page 5: Innovative Think Technology

    Baxi high efficiency boiler. * Based on average fuel consumption of a UK household as calculated in the British Gas Home Energy Report 2011, when measuring a Baxi Duo-tec 28 GA compared to a Baxi Duo-tec 28 HE boiler For technical enquiries e-mail technical.helpline@bdrthermea.com...

  • Page 6: Overview Of The Range

    Overview Overview An at a glance guide to our new boilers, the key features available with each model and their benefits to you and your customer Features and benefits Gas Adaptive Technology Automatic set-up for faster and easier installation Wide modulation range Reduces wear and tear, and gas usage Front component access For quicker and easier servicing...
  • Page 7 Overview Baxi Megaflo Baxi Duo-tec Baxi Neta-tec Baxi Solo HE System Compact Combi GA Combi GA † For technical enquiries e-mail technical.helpline@bdrthermea.com X8013 - Technical pocket guide DL v14_post proof.indd 7 30/08/2012 14:2...

  • Page 8: Efficiency Ratings

    Baxi Neta-tec Combi 33 GA (NG/LPG) 91.1 / 93.2 89.0 / 90.9 Baxi Megaflo System Compact GA Baxi Megaflo System Compact 12 GA (NG/LPG) 91.1 / 93.2 89.1 / 91.1 Baxi Megaflo System Compact 15 GA (NG/LPG) 91.1 / 93.2 89.0 / 91.0...

  • Page 9: Sales Order Codes

    Baxi Neta-tec Combi 28 GA (NG/LPG) 720023101 Baxi Neta-tec Combi 33 GA (NG/LPG) 720023201 Baxi Neta-tec Combi 24 GA (NG/LPG) & Std Flue 720861201 Baxi Neta-tec Combi 28 GA (NG/LPG) & Std Flue 720861301 Baxi Neta-tec Combi 33 GA (NG/LPG) & Std Flue...

  • Page 10: Flue Terminal Positioning

    Flue options Flue options Likely flue positions requiring a flue terminal guard Terminal Position with Minimum Distance (mm) Directly below an opening, air brick, opening windows, etc Above an opening, air brick, opening window etc Horizontally to an opening, air brick, opening window etc Below gutters, soil pipes or drain pipes 25 (75) Below eaves...
  • Page 11 Flue options Likely flue positions requiring a flue terminal guard Terminal Position with Minimum Distance (mm) Vertically from a terminal on the same wall 1500 Horizontally from a terminal on the same wall From adjacent wall to flue (vertical only) From adjacent opening window (vertical only) Adjacent to windows or openings on pitched and flat roofs Below windows or openings on pitched roofs...
  • Page 12 Flue options Flue options 300 min Terminal Assembly Top View Rear Flue Property Boundary Line NOTE: The distance from a fanned draught appliance terminal installed parallel to a boundary may not be less than 300mm, in accordance with the diagram above. Plume Displacement Air Inlet...
  • Page 13 Concentric 60/100 Flue (metres) Models Baxi Duo-tec Combi 24 GA Baxi Neta-tec Combi 24 GA Baxi Megaflo System Compact GA 12, 15, 18 & 24 Concentric 60/100 Flue (metres) Models Baxi Duo-tec Combi GA 28, 33 & 40 Baxi Neta-tec Combi GA 28 & 33 Baxi Megaflo System GA 28 &...

  • Page 14: Duo-Tec Combi Ga

    11.5 3.8 to 24 720118001 Duo-tec Combi 33 GA 13.5 4.7 to 28 720118201 Duo-tec Combi 40 GA 16.4 5.7 to 33 720118401 Baxi Duo-tec Combi GA pipe connection Boiler Boiler Side Side Condensate Drain Pressure Relief Valve (15mm) 50 mm...
  • Page 15 Duo-tec Combi GA Flue lengths Horizontal or Vertical Max. Permissible Flue Group (diameter) (H/V?) length Flue Group A (60/100) H & V st 1.5° Flue Group G (80/125) H & V Flue Group N (80/80) H & V Horizontal and vertical fluing options In line bend reduction amount: 135°...

  • Page 16: Control Options

    720971601 Baxi room thermostat Time Only Control 720971401 Baxi Electro-mechanical 24HR timer kit 720645201 Baxi plug-in digital 24H timer kit (Duo-tec) 720644901 Baxi Programmable 24HR Wireless Sensor (1 channel) Time & Temperature Control 720030501 Baxi Wireless Programmable Room Thermostat Additional Items...
  • Page 17 Duo-tec Combi GA Horizontal and vertical fluing options In line bend reduction amount: 135° = 0.25m, 93° = 0.5m. Multifit Flue Group N – (80mm Twin Flue systems) horizontal and vertical options Part No. 5111087 Part No. 5111072 Part No. 5111086...
  • Page 18 Duo-tec Combi GA For Plume Displacement Kit permissible flue lengths please see page 13. 500mm Min. IMPORTANT: If fitting a Plume Displacement Flue Kit, the air inlet must be a minimum of 150mm from any opening windows or doors. The inlet of the PDK MUST be at least 300mm above ground or balcony level or any projection or ledge.
  • Page 19 Duo-tec Combi GA Notes For technical enquiries e-mail technical.helpline@bdrthermea.com X8013 - Technical pocket guide DL v14_post proof.indd 19 30/08/2012 14:2...
  • Page 20 Duo-tec Combi GA Technical data Appliance Type Appliance Category CAT I 2H 3P Heat Input CH (Net) Heat Output CH (Non-Condensing) (Net) 24 model 24 model 28 model 28 model 33 model 33 model 40 model 40 model Heat Output CH (Condensing)
  • Page 21 Duo-tec Combi GA Clearances Weights copper tails (24/28 model) Above Casing 175mm Min Packaged Boiler 41.5kg Below Casing 150mm Min* Installation Lift 36 kg 450mm Min (33 model) Front (For Servicing) Packaged Boiler 43.5 kg 5mm Min Front Installation Lift...

  • Page 22: Neta-Tec Combi Ga

    Neta-tec Combi 28 GA 11.5 3.8 to 24 720023101 Neta-tec Combi 33 GA 13.5 4.7 to 28 720023201 For sales codes that include standard flue see page 10. Baxi Neta-tec Combi GA pipe connection Boiler Boiler Side Side Condensate Pressure Drain Relief...
  • Page 23 Neta-tec Combi GA SEDBUK Flue lengths Horizontal or Vertical Max. permissible Flue Group (diameter) (H/V?) length Flue Group A (60/100) H & V Flue Group G (80/125) H & V east 1.5° Flue Group N (80/80) H & V Horizontal and vertical fluing options In line bend reduction amount: 135°...
  • Page 24 Time Only Control 720971401 Baxi Electro-mechanical 24HR timer kit 720818201 Baxi plug-in digital 24H timer kit 720644901 Baxi Programmable 24HR Wireless Sensor (1 channel) Time & Temperature Control 720030501 Baxi Wireless Programmable Room Thermostat Additional Items 720103001 Baxi Wired Weather Sensor Technical Helpline: 0844 871 1525 X8013 - Technical pocket guide DL v14_post proof.indd 24...
  • Page 25 Neta-tec Combi GA Horizontal and vertical fluing options In line bend reduction amount: 135° = 0.25m, 93° = 0.5m. Multifit Flue Group N – (80mm Twin Flue systems) horizontal and vertical options Part No. 5111087 Part No. 5111072 Part No. 5111086 Flue Extension (pair, Flue Bend (pair) Flue Bend (pair)
  • Page 26 Neta-tec Combi GA For Plume Displacement Kit permissible flue lengths please see page 13. 500mm Min. IMPORTANT: If fitting a Plume Displacement Flue Kit, the air inlet must be a minimum of 150mm from any opening windows or doors. The inlet of the PDK MUST be at least 300mm above ground or balcony level or any projection or ledge.
  • Page 27 Neta-tec Combi GA Notes For technical enquiries e-mail technical.helpline@bdrthermea.com X8013 - Technical pocket guide DL v14_post proof.indd 27 30/08/2012 14:2...
  • Page 28 Neta-tec Combi GA Technical data Appliance Type Appliance Category CAT II 2H 3P Heat Input CH (Net) Heat Output CH (Non-Condensing) (Net) 24 model 24 model 28 model 28 model 33 model 33 model Heat Output CH (Condensing) Heat Input DHW (Net) 24 model 21.2 24 model...
  • Page 29 Neta-tec Combi GA Clearances Weights copper tails (24 model) Above Casing 175mm Min Packaged Boiler 38.5kg Below Casing 150mm Min* Installation Lift 34 kg 450mm Min (28 model) Front (For Servicing) Packaged Boiler 38.5kg 5mm Min Front Installation Lift 34 kg (In Operation) (33model) L.H.

  • Page 30: Megaflo System Compact Ga

    Megaflo System Compact 18 GA 2.5 to 18 720118701 Megaflo System Compact 24 GA 3.4 to 24 720118901 Megaflo System Compact 28 GA 4 to 28 720119101 Baxi Megaflo System Compact GA pipe connection Boiler Boiler Side Side Condensate Pressure Drain Relief...
  • Page 31 450mm (for servicing) **This is MINIMUM recommended dimension. Greater clearance will aid installation and maintenance. Heat Output Sales Code (kW) Megaflo System Compact 32 GA 4.6 to 32 720119201 Baxi Megaflo System GA pipe connection Boiler Boiler Side Side Condensate Drain Pressure...
  • Page 32 Megaflo System Compact GA Flue lengths In line bend reduction amount: 135° = 0.5m, 93° = 1.0m. Flue group are also applicable to the Baxi Megaflo System GA 32kW. Horizontal or Vertical Max. permissible Flue Group (diameter) (H/V?) length Flue Group A (60/100) H &...
  • Page 33 Pitched Roof Flashing Part No. 5111070 Flue vertical adapter 60/100 to 80/125mm Control options Part Number Description Temperature Only Control 720971601 Baxi room thermostat For technical enquiries e-mail technical.helpline@bdrthermea.com X8013 - Technical pocket guide DL v14_post proof.indd 33 30/08/2012 14:2...
  • Page 34 Megaflo System Compact GA Horizontal and vertical fluing options In line bend reduction amount: 135° = 0.25m, 93° = 0.5m. Multifit Flue Group N – (80mm Twin Flue systems) horizontal and vertical options Part No. 5111087 Part No. 5111072 Part No. 5111086 Flue Bend (pair) 90˚...
  • Page 35 Megaflo System Compact GA For Plume Displacement Kit permissible flue lengths please see page 13. 500mm Min. IMPORTANT: If fitting a Plume Displacement Flue Kit, the air inlet must be a minimum of 150mm from any opening windows or doors. The inlet of the PDK MUST be at least 300mm above ground or balcony level or any projection or ledge.
  • Page 36 Megaflo System Compact GA Technical data (12, 15, 18, 24, 28) Appliance Type Appliance Category CAT I 2H 3P Heat Output CH (Non-Condensing) Heat Input CH (Net) (Net) 12 model 12 model 15 model 15 model 18 model 18 model 24 model 24 model 28 model...

  • Page 37: Megaflo System Compact Ga

    Megaflo System Compact GA Technical data (32) Outercase Dimensions Appliance Type Casing Height 700mm Appliance Category Overall Height Inc Flue 860mm CAT II 2H 3P Casing Width 390mm Heat Input CH (Net) Casing Depth 300*mm *This can be reduced to 290mm by removing the 32 model boiler control access flap Weights...

  • Page 38: Baxi Solo Hea

    Solo HE Baxi Solo HE 5mm Min 390mm 5mm Min 200mm Min (300mm Min if using 80/125mm At least 1.5° 500mm Min 600mm For Servicing Purposes 285mm 50mm Min 5mm Min In Operation Clearances Above Flue: 200mm Below: 50mm* Left:...
  • Page 39 Solo HE Flue lengths Horizontal or Vertical Max. permissible Flue Group (diameter) (H/V?) length Flue Group B (70/110) H & V 4m + terminal Flue Group P (80/80) H & V Flue Group L (70/110) Horizontal and vertical fluing options In line bend reduction amount: 135°...
  • Page 40 Solo HE Horizontal and vertical fluing options In line bend reduction amount: 135° = Air 1.3m, Flue gas 2.6m; 93° = Air 4.8m, Flue gas 9.6m Multifit Flue Group P – (80mm Twin Flue systems) horizontal and vertical options Part No. 246136 Part No.
  • Page 41 Solo HE For Plume Displacement Kit permissible flue lengths please see page 13. 500mm Min. IMPORTANT: If fitting a Plume Displacement Flue Kit, the air inlet must be a minimum of 150mm from any opening windows or doors. The inlet of the PDK MUST be at least 300mm above ground or balcony level or any projection or ledge.

  • Page 42: Technical Data

    Solo HE Technical data Appliance Type Appliance Category CAT I Heat Output Heat Input (Q) (Gross) (Non Condensing 70° C Mean Water Temp) Gross 12 model 13.34 10.2 12 model 11.82 9.14 15 model 16.88 10.2 15 model 15.24 9.14 18 model 20.18 10.2...
  • Page 43 Solo HE Electrical Supply Power Consumption 230V ~ 50Hz (Appliance must be connected to an earthed supply) Internal Fuse Rating (BS 4265) Fuse 3.15 A T (PCB) External Fuse Rating Electrical Protection IPX2 Water Content Low Head litres 0.2m (8 in) min pints Static Head System Detail...

  • Page 44: Accessories And Controls

    Temperature Baxi room thermostat 720971601 Only Control Baxi electro mechanical 24hr 720971401 timer kit 720645201 Time only Baxi plug in digital 24hr timer kit Control 720818201 Baxi programmable 24hr wire- 720644901 less sensor Time & Baxi Wireless Programmable Temperature 720030501...

  • Page 45: Accessories

    Accessories and controls Baxi Megaflo Baxi Duo-tec Baxi Neta-tec System Compact Baxi Solo HE Combi GA Combi GA For technical enquiries e-mail technical.helpline@bdrthermea.com X8013 - Technical pocket guide DL v14_post proof.indd 45 30/08/2012 14:2...

  • Page 46: Accessories

    Accessories and controls Accessories and controls The advanced range of Baxi GA boilers deserve state of the art controls and accessories. We’ve introduced sensors that monitor internal and external temperatures so the boiler can adjust its output to perfectly suit the home’s heat...
  • Page 47 Accessories and controls Baxi plug-in digital 24 hour timer kit – standard & compact (#720645201) (#720818201) Compatible with Baxi Neta-tec Combi GA and Baxi Duo-tec Combi GA Plugs into boiler fascia for simple timer option Easy-to-read backlit LCD display The familiarity of a mechanical timer with...

  • Page 48: Accessories

    Combi GA and Baxi Megaflo System Compact GA Standard (GS1) for use with Baxi Duo-tec Combi GA and Baxi Megaflo System 32 GA Saves up to 37% of the gas used to heat hot water annually* Reduces cold water consumption by up...

  • Page 49: Accessories

    Compact for use with Baxi Neta-tec Combi GA and Baxi Megaflo System Compact GA Standard for use with Baxi Duo-tec Combi GA and Baxi Megaflo System 32 GA Stand the boiler 40mm off the wall so that you can run upward piping at the back of the boiler *Based on SAP 2005 and Building Regulations Part L 2006.
  • Page 50 Accessories and controls Accessories and controls Condensate trace heating kits Baxi is pleased to present an addition to the Multifit accessory range: the Multifit Condensate Trace Heating Kit. The Multifit Condensate Trace Heating Kit is compatible with all condensing boilers and easy for installers to fit where external condensate pipes are used.

  • Page 51: Baxi Ecogen

    1kW/h of low cost, low carbon electricity. MCS certified. Baxi Solargen™ The Baxi Solargen is a complete PV kit which uses energy from daylight to produce clean, sustainable electricity. The range includes a number of outputs with both pitched roof &...

  • Page 52: Baxi Solarflo

    As the world’s supply of gas diminishes, we must use this resource more efficiently and find other ways of meeting our hot water requirements. A Baxi Solarflo™ system gives customers a sustainable energy source which is free and natural, so it’s becoming an attractive addition for customers and developers with an eye on the future.
  • Page 53 Baxi Solarflo™ Baxi Solarflo™ key features & benefits: On-roof, in-roof and flat roof Quick fit brackets supplied portrait or landscape solar for on-roof kit to aid speedy collector panel packages installation available (1, 2 or 3 panels) to Tool free hydraulic fittings to...
  • Page 54 Baxi Solarflo™ On-roof Baxi Slate & Tile On-roof System Includes 1, 2 or 3 panels Solar controller Mounting rail and brackets Portrait or landscape options Solar fluid Codes portrait Codes landscape 1 panel 720670401 1 panel 720671701 2 panel 720670601...
  • Page 55 Baxi Solarflo™ In-roof Baxi Slate In-roof System Includes 1,2 or 3 panels 2.0m or 1 or 2 panels 2.5m Solar controller Mounting rail and brackets Solar fluid Portrait or landscape* options Slate flashing kit Codes portrait 2.0m Codes landscape 2.0m Codes portrait 2.5m...
  • Page 56 Baxi Solarflo™ Evacuated tube Baxi Evacuated Tubes for Slate or Tile Pitched Roof Includes 20 or 30 tubes Solar controller Mounting rail and brackets Solar fluid 30m flexible stainless steel pipe kit Hydraulic Pump Station Expansion vessel Manifold Codes 20 tube*...
  • Page 57 (see Installation Guide on www.baxi.co.uk) already has the facility built in to control an East/West array. A Baxi Solarflo 2 panel in-roof flat plate package, 2 panel on-roof flat plate package or Baxi evacuated tubes (20 or 30 tube kits) can be transformed into an East West arrangement by adding the appropriate kit.

  • Page 58: Our Support For You

    To book a place on one of our free new product training days simply contact your local Baxi Area Sales Manager, or visit www.baxitraining.co.uk Technical Helpline: 0844 871 1525 X8013 - Technical pocket guide DL v14_post proof.indd 58...

  • Page 59: Heateam And Aftersales Support

    Baxi boiler. In fact, it’s like having your very own aftersales team. Any problems encountered with a Baxi product within two years of installation will be resolved quickly and efficiently by one of our engineers.

  • Page 60: Works Business Support Scheme

    ‘Find an installer’ We’ll help you grow your business by adding a listing on to ‘Find an installer’ on the Baxi website * calls booked before 3pm **Available for registered boilers only. See website for details www.works2gether.co.uk Technical Helpline: 0844 871 1525 X8013 - Technical pocket guide DL v14_post proof.indd 60...

  • Page 61: Literature

    0844 871 1525 or contact your local Baxi Area Sales Manager. All our brochures, instructions, leaflets and guides are available free of charge. To download our brochures electronically visit www.baxi.co.uk For technical enquiries e-mail technical.helpline@bdrthermea.com X8013 - Technical pocket guide DL v14_post proof.indd 61 30/08/2012 14:3...

  • Page 62: Conversion Tables

    Conversion tables Metric and Imperial measures Imperial to Metric units 1 inch = 25.4 mm = 2.54 cm 1 foot = 304.8 mm = 0.3048 m 1 yard = 914.4 mm = 0.9144 m 1 mile = 1609 m = 1.609 km 1 square inch = 645.2 mm = 6.452 cm...

  • Page 63: Conversion Tables

    Conversion tables Metric to Imperial units 1 millimetre = 0.03937 in 1 metre = 39.37 in = 3.281 ft = 1.094 yd 1 kilometre = 0.6214 mile = 1094 yd 1 square millimetre = 0.001550 in 1 square metre = 1.196 yd = 0.047 hectare 1 cubic millimetre = 0.000061 in...

  • Page 64: Gas Rating Charts

    Gas rating chart Gas rating chart natural gas Gas rating chart for domestic gas meters (up to 6 m hr) which measures gas in m Average CV = 38.76MJ/m -1040btu/ft 2 min (gross) (net) 2 min (gross) (net) 0.002 0.65 0.58 0.052 16.80...
  • Page 65 Gas rating chart 2 min (gross) (net) 2 min (gross) (net) 0.102 32.95 29.68 0.152 49.10 42.23 0.104 33.59 30.26 0.154 49.74 44.81 0.106 34.24 30.85 0.156 50.39 45.39 0.108 34.88 31.43 0.158 51.03 45.98 0.110 35.53 32.01 0.160 51.68 46.56 0.112 36.18...

  • Page 66: Gas Rating Charts

    Gas rating chart Gas rating chart for domestic gas meters (up to 212 ft hr) which measures gas in ft Average CV = 38.76MJ/m -1040btu/ft (gross) (net) (gross) (net) 64.57 58.17 16.14 14.54 60.98 54.94 15.68 14.13 57.77 52.05 14.83 13.36 54.89 49.45...

  • Page 67: Useful Contacts

    Useful contacts Useful contacts Useful contacts Head Office: Baxi, Brooks House, Coventry Road, Warwick, CV34 4LL Tel: 0844 871 1525 (option 6) Email: info@baxi.co.uk General webiste: www.baxi.co.uk Specification website: www.baxiknowhow.co.uk aftersales service Tel: 0844 871 1525 (option 1) Fax: 01926 410006 Email: info@baxi.co.uk...
  • Page 68 Useful contacts Useful contacts Energy Saving Trust Tel: 020 7222 0101 Website: www.energysavingtrust.org.uk Gas Safe Register Tel: 0800 408 5577 Email: enquiries@gassaferegister.co.uk Web: www.gassaferegister.co.uk Chartered Institute of Plumbing & Heating Engineering Tel: : 01708 472791 Email: info@ciphe.org.uk www.ciphe.org.uk Association of Plumbing and Heating Contractors Tel: 0121 711 5030 Email: info@aphc.co.uk Web: www.aphc.co.uk...
  • Page 69 Notes Useful contacts Notes For technical enquiries e-mail technical.helpline@bdrthermea.com X8013 - Technical pocket guide DL v14_post proof.indd 69 30/08/2012 14:3...
  • Page 70 Notes Notes Technical Helpline: 0844 871 1525 X8013 - Technical pocket guide DL v14_post proof.indd 70 30/08/2012 14:3...

This manual is also suitable for:

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