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Installation & Servicing Instructions
Baxi Bermuda BBU 15 HE
Condensing Back Boiler Unit
These Instructions must be read in conjunction with those for
the separate Valor Dimension electric firefront.
They include the Benchmark Commissioning Checklist
and should be left with the user for safe keeping.
© Baxi Heating UK Ltd 2009
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Natural Gas Building Regulations and the Benchmark Commissioning Checklist Baxi Bermuda BBU 15 HE G.C.No. 44 075 09 Building Regulations (England & Wales) require notification of the installation of a heating appliance to the relevant Local For use with the following electric firefronts: Authority Building Control Department. From 1 April 2005 this Valor Dimension Classica Brass, Pewter or Black BBU Firefront can be achieved via a Competent Persons Self Certification Scheme as an option to not
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Installer Notification Guidelines Choose Building Regulations Notification Route Competent Person's Building Control Self Certification Scheme Install and Commission this Contact your relevant Local appliance to manufacturer's Authority Building Control instructions (LABC) who will arrange an inspection or contact a government approved inspector Complete the Benchmark Checklist If you notify via the ‘Gas Safe Register’, the register will issue the Building Regulations Install and Commission thi
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Legislation IMPORTANT - Installation, Commissioning, Service & Repair This company declare that no substances harmful to health are contained in the appliance or used during appliance This appliance must be installed in accordance with the manufacturer’s instructions and manufacture. the regulations in force. Read the instructions fully before installing or using the appliance. The appliance is suitable only for installation in GB and IE and should be installed in accordance with the rules in fo
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Safe Manual Handling General The following advice should be adhered to, from when first handling the boiler to the final stages of installation, and also during maintenance. Most injuries as a result of inappropriate handling and lifting are to the back, but all other parts of the body are vulnerable, particularly shoulders, arms and hands. Health & Safety is the responsibility of EVERYONE. There is no ‘safe’ limit for one man - each person has different capabilities. The boiler should be handle
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Contents Section Page 1.0 Introduction 7 2.0 General Layout 8 3.0 Technical Data 10 4.0 System Details 11 5.0 Site Requirements 15 6.0 Boiler Internal Wiring 20 7.0 Installation 21 8.0 Completion & Commissioning 25 9.0 Annual Servicing 27 10.0 Changing Components 29 11.0 Setting the Gas Valve 33 12.0 Fault Finding 34 13.0 Short Parts List 38 14.0 Notes 39 Benchmark Checklist 42 6 © Baxi Heating UK Ltd 2009
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1.0 Introduction 1.1 Description 1. The Baxi Bermuda BBU 15 HE is a central heating boiler designed for installation within a builders opening in the living space of a dwelling. 2. The boiler is a fully automatic gas fired condensing boiler. It is room sealed and fan assisted. 3. The boiler output will automatically modulate between: Max Min 15kW 4.6kW 15.7kW (condensing) 4.83kW (condensing) According to system load 4. It must be fitted in conjunction with one of the available electric firefront
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2.0 General Layout 2.1 Layout (Fig. 3) 1. Automatic Air Vent 1 2. Flue Connection 2 3. Spark Generator 4. Spark & Sensing Electrodes 5. Heat Exchanger 3 17 6. Boiler Control Connector 7. Control Wiring Connector 4 5 8. Condensate Sump 16 9. Gas Cock 10. Condensate Pump 11. Fan 15 12. Drain 14 13. Return Connection 14. Air Sampling Point 6 15. Flue Sampling Point 13 7 16. Flow Connection 17. Condensate Outlet 12 18. PCB Control Box (shown removed for clarity) 19. Boiler Control (cover open) 8 The
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2.0 General Layout 1 2.2 Flue Kit (10m & 12.5m) (Fig. 3a) 8 1. Terminal Cap 2. Flue Duct Adaptor 2 3. Air Cowl 4. Air Duct Collar 5. Air Duct Clamp 6. Closure Plate 7. Boiler Adaptor 3 8. 60mm Ø Seal 9. Collar Securing Screws x 4 10. 100mm Ø Seal 9 11. 60mm Ø Flue Duct 12. 100mm Ø Air Duct 4 13. ‘C’ Clip 5 6 8 11 10 12 7 13 Fig. 3a 9 © Baxi Heating UK Ltd 2009
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3.0 Technical Data 3.1 Bermuda HE CBBU 15 HE Appliance Type C 33 Sedbuk Declaration For Bermuda BBU 15 HE Appliance Category CAT I 2H The seasonal efficiency (SEDBUK) is 90.1% Inlet Pressure (Natural Gas - G20) mbar 20 This value is used in the UK Government’s Standard Assessment Procedure (SAP) for energy Injector (Natural Gas - G20) rating of dwellings. The test data from which it has 420 (4.2 mm) been calculated has been certified by 0087. NO Class 5 (31mg/kWh) x Heat Input (Net) Max Min
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4.0 System Details 4.1 Water Circulating Systems 1. The appliance is suitable for use on fully pumped systems ONLY which may be sealed or open vented. 2. The following conditions should be observed at all times: The static head must not exceed 30m of water. The static head must not be less than 1m of water. The boiler must not be used with a direct cylinder. Drain cocks should be fitted to all system low points. All gas and water pipes and electrical wiring must be installed in such a way
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4.0 System Details Copper 4.3 Pipework Copper 0.5m 0.5m Flow 1. The sizes of the flow and return pipes from the Boiler Return boiler should be determined by normal methods Copper according to the requirements of the system. 1m 2. It is recommended that the system is designed for a drop in temperature across the system of between Fig. 4 11& 20°C. 3. In systems using non-metallic pipework it is necessary to use copper pipe for the boiler Flow and Return. The copper must extend at least 1 metre f
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4.0 System Details 4.7 Sealed Systems (Figs. 6, 7 & 8) 1. Installation. The installation must comply with the requirements of BS 6798 and BS EN 12828. The British Gas publication “British Gas Specification for Domestic Wet Central Heating Systems” should also be Pressure Gauge consulted. Air Vent 2. Pressure Relief Valve. A non-adjustable spring loaded Safety pressure relief valve, preset to operate at 3 bar Indirect Valve 2 (45 lbf/in ) shall be used. It must comply with BS 6759:1 Cylinder and
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4.0 System Details 4.7 Sealed Systems (cont) 4. Expansion Vessel. A diaphragm type expansion vessel to Temporary BS 4814:1 shall be fitted close to the inlet side of the pump. Hose The connecting pipework should not be less than 15mm. Pipework connecting the expansion vessel should not Mains Water Hose Stop incorporate valves of any sort. Supply Union Valve (Service Pipe) Methods of supporting the vessel are supplied by the vessel manufacturer. The nitrogen or air charge pressure of the expansio
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5.0 Site Requirements 5.1 Builders Opening (Fig. 9) Builders Opening 1. The boiler unit is designed to fit within a standard builders opening, the minimum dimensions of which are as shown. Fireplace Opening Height 570mm Width 584mm Depth 305mm 390mm min 2. The opening should be soundly constructed of brick, 490mm max pre-cast concrete or be a proprietary builders opening. 584mm min 3. The base of the opening should be sound and non- combustible and must be flat and level. 4. The base of the buil
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5.0 Site Requirements 5.5 Flue 1. The following guidelines indicate the general requirements for installation of flues. For GB recommendations are given in BS 5440 Part 1. A For IE recommendations are given in the current edition of I.S. 813 “Domestic Gas Installations”. B 2. Only one of the two available MULTIIFIT vertical concentric Flexi Flue kits approved for use with the boiler can be used (10m kit 720101701 or 12.5m kit 720102001). Any proprietary flue systems, terminals, adaptors etc. MU
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5.0 Site Requirements 5.6 Ventilation 1. No ventilation is required for the boiler in the room of installation. 5.7 Gas Supply (Fig. 11) 1. The gas installation should be in accordance with relevant standards. In GB this is BS 6891. In IE this is I.S. 813 “Domestic Gas Installations”. The connection at the appliance is 15mm copper tail located at the rear of the gas tap. 2. Ensure the pipework from the meter to the appliance is of adequate size. It is necessary to route the gas supply pipe to t
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5.0 Site Requirements 5.9 Condensate Drain - General Failure to install the condensate discharge pipework correctly will affect the reliable operation of the boiler. 1. Ensure the discharge of condensate complies with any national or local regulations in force. BS 6798 & Part H1 of the Building Regulations give further guidance. 2. If any further drain pipe is required (additional to that supplied with the boiler), it should be run in a proprietary material e.g. PVC, PVC-U, ABS, PVC-C or PP. J
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5.0 Site Requirements 5.10 Condensate Disposal (cont.) Termination via internal discharge branch e.g sink waste - downstream 9. Ensure that the condensate can discharge freely (without Pipe must terminate Direct Connect Fitting blockage or restriction of the pipe) into the drain. above water level but below surrounding surface 10. Examples are shown of condensate pipe methods of Sink termination:- i) via an internal discharge branch (e.g. sink waste) - Fig. 13. ii) to an internal or external soi
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6.0 Boiler Internal Wiring 6.1 Boiler Internal Illustrated Wiring Diagram Central Heating NTC Flow Sensor gr gr Overheat Thermostat Discharge Float Switch Safety Float Switch bk b 1 bk r 4 2 5 gr br b gr g Fan bk 3 bk 1 bk 2 b g/y br bk bk X400 X401 X900 987 6 54 3 2 1 10 9 8 7 6 54 3 2 1 X300 Control PCB r X501 X500 Condensate Pump 12 12 3 4 5 12 3 4 5 67 8 9 X1 X2 X3 b b y br bk bk bk br br bk bk b b br ON/OFF b Reset br b b b br br 3 Spark b N a Generator 2 1 Gas Valve r r bk b Ignition y El
