Baxi Bermuda BBU 15 HE Installation & Servicing Instructions Manual

Condensing back boiler unit

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Installation & servicing instructions manual (44 pages)

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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.

Supplied By www.heating spares.co Tel. 0161 620 6677

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Summary of Contents for Baxi Bermuda BBU 15 HE

Page 1 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.
Page 2 The flowchart opposite gives guidance for installers on the process necessary to ensure compliance with Building © Baxi Heating UK Ltd 2010 All rights reserved. No part of this publication may Regulations. be reproduced or transmitted in any form or by any means, or stored in any...
Page 3: Installer Notification Guidelines
‘Gas Safe Register’ will issue a LABC will record the data Building Regulations Compliance and will issue a Certificate to the property owner certificate of compliance and inform the relevant LABC © Baxi Heating UK Ltd 2010 Supplied By www.heating spares.co Tel. 0161 620 6677...
Page 4 Domestic Gas Installations. The following BS standards give valuable additional information; BS 5546 Installation of hot water supplies for domestic purposes. BS 5449 Forced circulation hot water systems. © Baxi Heating UK Ltd 2010 Supplied By www.heating spares.co Tel. 0161 620 6677...
Page 5 7) Inspect and maintain the work equipment to be used and inspect the place where the work will be carried out for both access and egress. © Baxi Heating UK Ltd 2010 Supplied By www.heating spares.co Tel. 0161 620 6677...
Page 6: Table Of Contents
Boiler Internal Wiring Installation Completion & Commissioning Annual Servicing 10.0 Changing Components 11.0 Setting the Gas Valve 12.0 Fault Finding 13.0 Short Parts List 14.0 Notes Benchmark Checklist © Baxi Heating UK Ltd 2010 Supplied By www.heating spares.co Tel. 0161 620 6677...
Page 7: Introduction
1.0 Introduction 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.
Page 8: General Layout
(item 6). PCB Control Box removed for clarity Fig. 3 PCB Control Box Calibration Controls © Baxi Heating UK Ltd 2010 Supplied By www.heating spares.co Tel. 0161 620 6677...
Page 9 Closure Plate Boiler Adaptor 60mm Ø Seal Collar Securing Screws x 4 100mm Ø Seal 60mm Ø Flue Duct 100mm Ø Air Duct ‘C’ Clip Fig. 3a © Baxi Heating UK Ltd 2010 Supplied By www.heating spares.co Tel. 0161 620 6677...
Page 10: Technical Data
12.5 Dimensions Casing Height - 538mm Casing Width - 383mm Casing Depth - 306mm Firefront See the instructions supplied with the firefront for all Technical Data © Baxi Heating UK Ltd 2010 Supplied By www.heating spares.co Tel. 0161 620 6677...
Page 11: System Details
(Test kits are available from inhibitor stockists.) For information or advice regarding any of the above contact Technical Enquiries 0844 871 1555. © Baxi Heating UK Ltd 2010 Supplied By www.heating spares.co Tel. 0161 620 6677...
Page 12: Between
Storage Systems 1. For information regarding the use of a Bermuda BBU 15 HE boiler with a storage system, contact the appropriate storage system manufacturer. © Baxi Heating UK Ltd 2010 Supplied By www.heating spares.co Tel. 0161 620 6677...
Page 13 75 x 0.152 = 11.4 litres Expansion Vessel Volume NOTE Where a vessel of the calculated size is not obtainable then the next available larger size should be used. © Baxi Heating UK Ltd 2010 Supplied By www.heating spares.co Tel. 0161 620 6677...
Page 14: Between
All components used in the system must be suitable for operation at 110°C and at the pressure allowed by the safety valve. © Baxi Heating UK Ltd 2010 Supplied By www.heating spares.co Tel. 0161 620 6677...
Page 15: Site Requirements
2. If necessary this can be increased by the use of Frame Extension Kits. Each extension increases the effective depth of the opening by 50mm. 3. See the instructions supplied with the firefront for full details. © Baxi Heating UK Ltd 2010 Supplied By www.heating spares.co Tel. 0161 620 6677...
Page 16 600mm away (B). A minimum dimension of 2000mm must be maintained when below windows or openings in pitched roofs (C) (Fig. 10). © Baxi Heating UK Ltd 2010 Supplied By www.heating spares.co Tel. 0161 620 6677...
Page 17 5. The cable must be routed to avoid contact with any part of the boiler. © Baxi Heating UK Ltd 2010 Supplied By www.heating spares.co Tel. 0161 620 6677...
Page 18 9. Any part of the condensate drain system that is outside the dwelling, or in an unheated part of it must be at least 21.5mm diameter and suitably insulated. © Baxi Heating UK Ltd 2010 Supplied By www.heating spares.co Tel. 0161 620 6677...
Page 19 5. The total volume of the sump is 1.5 litres. Termination to a purpose made soak-away From Boiler Fig. 16 Holes in the soak-away must face away from the building © Baxi Heating UK Ltd 2010 Supplied By www.heating spares.co Tel. 0161 620 6677...
Page 20: Boiler Internal Wiring
(Permanent Live to 3, Switched Live to 1) - green - brown - green / yellow - black - red - blue - grey - white - yellow © Baxi Heating UK Ltd 2010 Supplied By www.heating spares.co Tel. 0161 620 6677...
Page 21: Installation
7.0 Installation INSTALLATION SEQUENCE There are 4 main elements to the installation of the Baxi Bermuda BBU 15 HE:- • Preparation of pipework & opening • Inserting the flue into the chimney • Siting & fixing the boiler • Fitting the terminal assembly...
Page 22 This will prevent the duct falling back into the chimney (Fig. 27). Cut to leave 5 ribs visible Fig. 25 Fig. 27 Fig. 26 © Baxi Heating UK Ltd 2010 Supplied By www.heating spares.co Tel. 0161 620 6677...
Page 23 (Fig. 34). Fig. 30 Fig. 31 Fig. 32 Terminal Cement around Air Duct Collar & Cowl Fig. 33 Fig. 34 © Baxi Heating UK Ltd 2010 Supplied By www.heating spares.co Tel. 0161 620 6677...
Page 24 1. Fig. 37 4. Refit the cover, tighten the screws to secure the cable and connect the plug to the one on the boiler. © Baxi Heating UK Ltd 2010 Supplied By www.heating spares.co Tel. 0161 620 6677...
Page 25: Completion & Commissioning
Remaining Resets 13. When the reset button is activated the number of available reset attempts will be displayed Fig. 40 © Baxi Heating UK Ltd 2010 Supplied By www.heating spares.co Tel. 0161 620 6677...
Page 27: Annual Servicing
Fig. 42 satisfactory either adjust the gas valve (Section 11.0), replace the gas valve (Section 10.8) or contact the ‘heateam’ Technical Helpline (0844 871 1555). © Baxi Heating UK Ltd 2010 Supplied By www.heating spares.co Tel. 0161 620 6677...
Page 28 Recommission the Fig. 44 boiler and complete the relevant Service Interval Record section of the Benchmark Commissioning Checklist at the rear of this publication. © Baxi Heating UK Ltd 2010 Supplied By www.heating spares.co Tel. 0161 620 6677...
Page 29: Changing Components
4. Replace in reverse order of dismantling. Examine the sealing ring and replace if necessary. 5. Ensure that the leads are pushed fully on to their Fig. 48 terminals. © Baxi Heating UK Ltd 2010 Supplied By www.heating spares.co Tel. 0161 620 6677...
Page 30 2. Replace in reverse order of dismantling. Examine the sealing washers and replace if necessary. Spark Generator Plug Fig. 50 Gas Feed Injector Pipe © Baxi Heating UK Ltd 2010 Supplied By www.heating spares.co Tel. 0161 620 6677...
Page 31 4 full turns clockwise (Fig. 51). If the boiler will not light, or the correct CO cannot be achieved contact the ‘heateam’ technical helpline. Gas Valve Earth Wire Fig. 51 © Baxi Heating UK Ltd 2010 Supplied By www.heating spares.co Tel. 0161 620 6677...
Page 32 Tighten the nut a further 2 turns. 7. Reconnect the lead to the switch, ensuring it is fully engaged. Safety Float Switch Alignment Bracket Fig. 55 © Baxi Heating UK Ltd 2010 Supplied By www.heating spares.co Tel. 0161 620 6677...
Page 33: Setting The Gas Valve
12. Check the CO/CO ratio. This must be less than 0.004. maximum rate it must be rechecked at minimum rate and adjusted if required. © Baxi Heating UK Ltd 2010 Supplied By www.heating spares.co Tel. 0161 620 6677...
Page 34: Fault Finding
4 times in any 5 hour period. Further resets via the Boiler Control are then blocked for 5 hours unless a Service Reset is performed. © Baxi Heating UK Ltd 2010 Supplied By www.heating spares.co Tel. 0161 620 6677...
Page 35 Burner relights after at least 3 minutes, when the display is Operation sequence Burner goes out Fan stops after 10 seconds less than the set temperature successful (room thermostat open) © Baxi Heating UK Ltd 2010 Supplied By www.heating spares.co Tel. 0161 620 6677...
Page 36: Fault Finding Solutions Sections
1. Ignition electrode and lead (Note: from multimeter connect 2. Electrode connection ‘common’ to 2 & ‘volts’ to 5) Replace igniter 3. Spark gap and position Check wiring © Baxi Heating UK Ltd 2010 Supplied By www.heating spares.co Tel. 0161 620 6677...
Page 37 Boiler Control must be refreshed by ‘Restoring Boiler Control Default’ as described on p.34 following the final ‘Service Reset’ and before the Boiler Control reset is re-used. © Baxi Heating UK Ltd 2010 Supplied By www.heating spares.co Tel. 0161 620 6677...
Page 38: Short Parts List
Ignition Lead 720127501 Gas Valve 720127001 P.C.B 720125801 5121447 NTC Sensor 720126101 Float Switch 720126201 (Safety or Discharge) Safety Thermostat 720126401 Spark Generator 5114766 Condensate Pump 720125901 © Baxi Heating UK Ltd 2010 Supplied By www.heating spares.co Tel. 0161 620 6677...
Page 42: Benchmark Checklist
GAS BOILER SYSTEM COMMISSIONING CHECKLIST This Commissioning Checklist is to be completed in full by the competent person who commissioned the boiler as a means of demonstrating compliance with the appropriate Building Regulations and then handed to the customer to keep for future reference. Failure to install and commission this equipment to the manufacturer’s instructions may invalidate the warranty but does not affect statutory rights.
Page 43: Service Record
SERVICE RECORD It is recommended that your heating system is serviced regularly and that the appropriate Service Record is completed. Service Provider Before completing the appropriate Service Record below, please ensure you have carried out the service as described in the manufacturer’s instructions.
Page 44: Baxi Heating Uk Ltd
Standard Warranty Terms & Conditions To activate your second year free warranty you must register your boiler with heateam the service division of Baxi Heating UK Ltd either by completing and returning the registration card or calling our telephone registration line on 0800 013 7989.

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