Baxi 50 HE Plus Installation & Servicing Instructions Manual
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Baxi 50 HE Plus Installation & Servicing Instructions Manual

Wall mounted powered flue condensing boilers
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Installation & Servicing Instructions
Baxi 50 HE Plus
Baxi 80 HE Plus
Baxi 100/2 HE Plus
Wall Mounted Powered Flue Condensing Boilers
Gas Fired Central Heating Units
These instructions include the Benchmark Commissioning Checklist and
should be left with the User for safe keeping
© Baxi Heating UK Ltd 2006

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  • Page 1 Baxi 80 HE Plus Baxi 100/2 HE Plus Wall Mounted Powered Flue Condensing Boilers Gas Fired Central Heating Units These instructions include the Benchmark Commissioning Checklist and should be left with the User for safe keeping © Baxi Heating UK Ltd 2006...
  • Page 2 The flowchart opposite gives guidance for installers on the © Baxi Heating UK Ltd 2006 All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means, or stored in any...
  • Page 3 CORGI is written onto the Benchmark Checklist CORGI will record the data and LABC will record the data will send a certificate of and will issue a compliance to the property certificate of compliance © Baxi Heating UK Ltd 2006...
  • Page 4 Notified Body 0087. BS 7074 Expansion vessels and ancillary equipment for sealed water systems. BS 7593 Treatment of water in domestic hot water Product/Production certified by: central heating systems. Notified Body 0086. For GB/IE only. © Baxi Heating UK Ltd 2006...
  • Page 5 If at any time when installing the boiler you feel that you may have injured yourself STOP !! DO NOT ‘work through’ the pain - you may cause further injury. IF IN ANY DOUBT DO NOT HANDLE OR LIFT THE BOILER - OBTAIN ADVICE OR ASSISTANCE BEFORE PROCEEDING !! © Baxi Heating UK Ltd 2006...

  • Page 6: Table Of Contents

    Dimensions and Fixings System Details Site Requirements Installation Electrical 10.0 Commissioning the Boiler 11.0 Fitting the Outer Case 12.0 Servicing the Boiler 13.0 Changing Components 14.0 Short Parts List 15.0 Fault Finding Benchmark Checklist © Baxi Heating UK Ltd 2006...

  • Page 7: Introduction

    1.0 Introduction Description 1. The Baxi 50 HE Plus, 80 HE Plus and100/2 HE Plus are gas fired room sealed fan assisted condensing central heating boilers. 2. The maximum output of the Baxi 50 HE Plus is 52,000 Btu/hr. The maximum out put of the 80 HE Plus is 75,000 Btu/hr.

  • Page 8: General Layout

    Reduce overall length of flue 241687 by 1m when fitting each bend) Horizontal Extended Flue (1.75M) 5111457 Plume Displacement 5117383 VERTICAL FLUE (110/70) Vertical Flue Terminal 242802 Vertical Flue Adaptor 5106888 Fig. 3 Fig. 4 Fig. 6 © Baxi Heating UK Ltd 2006...

  • Page 9: Appliance Operation

    ? 9. Ignition Lockout: The pump, fan, spark generator and gas valve are off. The boiler can only be reset by manually using the reset button. 1 minute Pump Overrun. 3 minute Anti-cycle. © Baxi Heating UK Ltd 2006...

  • Page 10: Technical Data

    30.18kW (102,980 Btu/hr) - see section 8.8. SEDBUK Declaration For 50 HE Plus - The efficiency is 91.3% For 80 HE Plus - The efficiency is 90.9% For 100/2 HE Plus - The efficiency is 90.9% This value is used in the UK Government’s Standard Assessment Procedure (SAP) for energy rating of dwellings.

  • Page 11: Dimensions And Fixings

    3° (1 in 20) fall in the flue from the terminal to the elbow. Flue length (Y) Clearance (X) up to 1m 55mm 1m - 2m 110mm 2m - 3m 165mm Fig. 8 © Baxi Heating UK Ltd 2006...

  • Page 12: System Details

    (Test kits are available from inhibitor stockists.) • For information or advice regarding any of the above contact Technical Enquiries. © Baxi Heating UK Ltd 2006...
  • Page 13 1. When the boiler is fitted in conjunction with a thermal store, both jumpers must be removed from the PCB, see Fig. 32 Section 8.8. 22mm 200mm Feed & Vent Pipe Separator Boiler Pump Flow Return Fig. 12 Alternative Low Head Installation © Baxi Heating UK Ltd 2006...
  • Page 14 Pump must be run from Boiler P/F connection for Part L1 compliance Pump must be run from Boiler P/F connection for Part L1 compliance By-pass not permitted (must be valved) for Part L1 compliance By-pass not permitted (must be valved) for Part L1 compliance © Baxi Heating UK Ltd 2006...
  • Page 15 All components Valve Valve Valve used in the system must be suitable for operation at 110°C (230°F) and at the pressure allowed by the safety valve. Temporary Hose Mains Return Fig. 14 Inlet © Baxi Heating UK Ltd 2006...

  • Page 16: Site Requirements

    3. Any compartment should be large enough to house the boiler only. NOTE: The ventilation label on the front of the outer Fig. B case MUST NOT BE REMOVED when the appliance is In GB Only installed in a compartment or cupboard. © Baxi Heating UK Ltd 2006...
  • Page 17 3mm in all poles and servicing the boiler and system controls only. WARNING: The PCB Control and Fan Assembly are 325 Vdc. Isolate at supply before access. 320mm In Operation Fig. 16 © Baxi Heating UK Ltd 2006...
  • Page 18 & vent pipe ii) via an internal discharge branch (e.g. sink waste) 500mm min iii) to a drain or gully iv) to a purpose made soakaway Holes in the soak-away must face away from the building © Baxi Heating UK Ltd 2006...
  • Page 19 Assembly but the flue deflector kit (part no. 248167) must be fitted. 7. If required a suitable terminal guard is available from Baxi for use with the flue deflector. 8. For fitting under low soffits and eaves it is acceptable for...
  • Page 20 Twin flue adaptor kit 242757 Vertical flue terminal 242802 Universal roof tile 25°/50° 243015 Roof cover plate kit 243131 Flat roof flashing 243016BAX Vertical flue adaptor 5106888 Clamp 80mm 238684 Plume Displacement Kit 5117383 © Baxi Heating UK Ltd 2006...
  • Page 21 100mm from 70Ø Exhaust any opening windows or doors (see Section 7.9). Plume Displacement Kit Air Inlet Concentric 70/110 Flue (MUST be installed Opening Window horizontally) or Door 100mm Fig. 17b Fig. 17c MIN. © Baxi Heating UK Ltd 2006...
  • Page 22 7.12 Vertical Flue Fig. 18a 1. Only a flue approved with the Baxi 50, 80 and 100/2 Pictorial examples of flue runs where EQUIVALENT flue length equals 4m HE Plus can be used. 2. For information on vertical flues consult the Baxi Flue Guide Brochure or Notes for Guidance supplied with the vertical flue pack.

  • Page 23: Installation

    (Fig. 22). Centralising Screw 8. Loosely route the condensate discharge pipe to the lower left hand side of the wall plate. Wall Plate Fig. 22 © Baxi Heating UK Ltd 2006...
  • Page 24 Preparing The Boiler Lower Door Panel 1. Remove the outer carton. 2. Remove the internal packaging. 3. Lift the outercase upwards and remove (Fig. 23). Outercase Break Off Upper & Lower Pipe Run Options Fig. 23 © Baxi Heating UK Ltd 2006...
  • Page 25 - Carefully pour approximately 1 cupful (250ml) of water into the flue products exhaust, at the top of the heat exchanger (Fig. 25a) to ensure a seal is made in the trap. © Baxi Heating UK Ltd 2006...
  • Page 26 Deburr both tube ends. IMPORTANT: Check all measurements before cutting. NOTE: When cutting ensure the cut does not interfere with the inner flue support bracket Fig. 27a (Fig. 27a). © Baxi Heating UK Ltd 2006...
  • Page 27 13. If necessary fit a terminal guard (see Section 7.9). Gasket VERTICAL FLUEING 1. Only a flue approved with the Baxi 50, 80 and 100/2 HE Plus can be used. 2. For information on vertical flues consult the Baxi Flue Guide Brochure or Notes for Guidance supplied with the vertical flue pack.
  • Page 28 2. Undo the two screws securing the cable clamp and place to one side (Fig. 31). 3. The Baxi 100/2 HE Plus is factory set to give a maximum output of 22.0 kW (75,000 Btu/hr). The Control PCB jumper positions are as follows:...

  • Page 29: Electrical

    Trap Key To Wiring Colours b - Blue r - Red bk - Black g - Green w - White g/y- Green/Yellow br - Brown op - Opaque gy - Grey y - Yellow © Baxi Heating UK Ltd 2006...
  • Page 30 Fan Overheat Thermostat Flow Overheat Thermostat Wiring Key - Blue bk - Black br - Brown - Red w - White g/y - Green/Yellow - Green gy - Grey op - Opaque - Yellow © Baxi Heating UK Ltd 2006...

  • Page 31: Commissioning The Boiler

    Fig. 34 NOTE: The boiler is self-regulating dependent upon Control Knob the system load. The 50 HE Plus will modulate between inputs of 16.88kW and 10.3kW. The 80 HE Plus will modulate between inputs of 24.9kW and 10.3kW. The 100/2 HE Plus will modulate between inputs of 33.76kW and 10.3kW.

  • Page 32: Fitting The Outer Case

    10. Complete the label supplied with the inhibitor and stick to the inside of the boiler case. Detail of system Fig. 38 treatment must be recorded in the Benchmark Commissioning Checklist. Lower Door Panel © Baxi Heating UK Ltd 2006...

  • Page 33: Servicing The Boiler

    Hazardous materials are not used in the construction of Baxi products, however reasonable care during service is recommended. When replacing the combustion box door after servicing it is essential that the retaining screws are tightened fully.
  • Page 34 12. Complete the relevant Service Interval Record Securing Screws Burner Securing section of the Benchmark Commissioning Checklist at Screws the rear of this publication and then hand it back to the Fig. 44 user. © Baxi Heating UK Ltd 2006...

  • Page 35: Changing Components

    Hazardous materials are not used in the construction of Baxi products, however reasonable care during service is recommended. When replacing the combustion box door after changing components, it is essential that the retaining screws are tightened fully.
  • Page 36 7. Remove the flowswitch. Flow Switch 8. Fit the new flowswitch and reassemble in reverse Flow Pipe order. 9. Recommission the boiler and check the inhibitor concentration (see Section 6.2 and 10.1). Fig. 47 Clip © Baxi Heating UK Ltd 2006...
  • Page 37 2. Lift Control PCB housing out of hinge housing of Fig. 48 metal bracket. PCB Housing Securing Screw 3. Fit the new PCB Housing Assembly and reassemble in reverse order. Hinge down PCB Housing Blue (CN11) Jumper Red (CN12) Jumper Fig. 49 © Baxi Heating UK Ltd 2006...
  • Page 38 6. Fit the new fan and reassemble in reverse order. The injector pipe, condensate trap and gas valve can be changed after the removal of Protection the fan. Sensor Venturi Electrical Connections Fig. 52 Electrical Connection Wing Nuts © Baxi Heating UK Ltd 2006...
  • Page 39 5. Disconnect the sensor leads. Service Drain Plug Condensate 6. Fit the new condensate trap and reassemble in Drain Pipe reverse order. Fig. 54 7. Prime the condensate trap (fill first chamber), check for leaks. © Baxi Heating UK Ltd 2006...
  • Page 40 6. Fit the new heat exchanger and reassemble in reverse order. Fig. 58 7. Recommission the boiler and check the inhibitor concentration (see Section 6.2 and 10.1). Heat Exchanger Manifold Heat Exchanger Assembly Fig. 59 © Baxi Heating UK Ltd 2006...
  • Page 41 5. Remove the combustion box base. Combustion Box Base Securing Screws 6. Pull the central insulation panel down from the Burner Securing centre of the heat exchanger. Screws 7. Fit the new insulation pad and reassemble in reverse order. © Baxi Heating UK Ltd 2006...

  • Page 42: Short Parts List

    E06 060 Safety Thermostat (Black) 242235 5110991 5109925 Gas Valve 241900 E06 085 Viewing Window 242484 Condensate Trap 5111714 Electrodes Kit 5110992 Burner Assy 5107430 E06 097 Heat Exchanger Assy 242497 Control Knob 5109996 © Baxi Heating UK Ltd 2006...

  • Page 43: Fault Finding

    Lights On On Flash PCB Fault Replace PCB. Lights Go to Fan Lockout Flash Flash On section of the fault finding instructions. Lights Flash On On PCB Fault Replace PCB. © Baxi Heating UK Ltd 2006...
  • Page 44 Check wiring from 240V at B ? terminal block to PCB. Optional Pump Live Check for shorts on pump, fan & gas valve. PCB fuse OK ? Replace if shorted & replace fuse. Replace PCB. Fuse © Baxi Heating UK Ltd 2006...
  • Page 45 Live Remove Is there a flow switch from boiler. Is there a physical blockage to Replace Flow Switch. blockage in the system ? the paddle within the flow switch ? Replace Blockage. Replace Blockage. © Baxi Heating UK Ltd 2006...
  • Page 46 3 and 4mm ? Is the wiring from PCB to spark probe & flame burner blocked or Replace PCB. detection probe OK ? damaged ? Clean burner or replace as Rectify wiring. necessary. © Baxi Heating UK Ltd 2006...
  • Page 47 (red sensor on flow pipe). Replace thermistor. Is resistance between 0.5kΩ & 20kΩ ? Replace combustion combustion chamber chamber door seal & trim door seal damaged or not in seal. place ? Replace PCB. © Baxi Heating UK Ltd 2006...
  • Page 48 6-way PCB connector. Is there Rectify wiring. continuity from R to S & from T to U & from V to W ? Viewed from Wire Entry end Replace fan. © Baxi Heating UK Ltd 2006...
  • Page 49 Replace thermistor. 0.5kΩ & 20kΩ ? Plug in thermistor, leave Wiring from PCB to 8-way connector unplugged. thermistor faulty. Viewed from Is resistance at D between 0.5kΩ & 20kΩ ? Wire Entry end Replace PCB. © Baxi Heating UK Ltd 2006...

  • Page 50: Benchmark Checklist

    5 1 1 3 6 3 8 BENCHMARK No. GAS BOILER COMMISSIONING CHECKLIST C O L L E C T I V E M A R K BOILER SERIAL No. NOTIFICATION No. CONTROLS To comply with the Building Regulations, each section must have a tick in one or other of the boxes TIME &...
  • Page 51 SERVICE INTERVAL RECORD It is recommended that your heating system is serviced regularly and that you complete the appropriate Service Interval Record Below. Service Provider. Before completing the appropriate Service Interval Record below, please ensure you have carried out the service as described in the boiler manufacturer’s instructions.
  • Page 52 A T r a d in g D i v i s i on of B a x i H eat i ng U K L td Brooks House, Coventry Road, Warwick. CV34 4LL After Sales Service 08700 60 30 60 Technical Enquiries 08706 049 049 Website www.baxi.co.uk e&oe © Baxi Heating UK Ltd 2006 Comp N 5113638 - Iss 4 - 10/06...

This manual is also suitable for:

80 he plus100/2 he plus41 077 4141 077 4241 075 34

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