Baxi 100 He Installation And Servicing Instructions
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Baxi 100 He Installation And Servicing Instructions

Baxi 100 He Installation And Servicing Instructions

Wall mounted powered flue condensing boiler gas fired central heating unit
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Baxi 100 HE
Wall Mounted Powered Flue Condensing Boiler
Gas Fired Central Heating Unit
Installation and
Servicing Instructions
Please leave these instructions with the user

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Summary of Contents for Baxi 100 He

  • Page 1 Please leave these instructions with the user Baxi 100 HE Wall Mounted Powered Flue Condensing Boiler Gas Fired Central Heating Unit Installation and Servicing Instructions...
  • Page 2 Type test for purpose of Regulation 5 certified by: Notified Body 0086. We hope you get a satisfactory service from Baxi. If Product/Production certified by: not, please let us know. Notified Body 0086.

  • Page 3: Table Of Contents

    Contents Section Page Introduction General Layout Appliance Operation Technical Data 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 Fault Finding 15.0 Short Parts List...

  • Page 4: Introduction

    Read the instructions fully before installing or using the appliance. Description 1. The Baxi 100 HE is a gas fired room sealed fan assisted condensing central heating boiler. H IG 2. The maximum output of the boiler is preset at 75,000 Btu/hr.

  • Page 5: General Layout

    2.0 General Layout Layout (Figs. 3,4 & 5) Wall Plate Flue Elbow Heat Exchanger Burner Air Box Fan Protection Thermostat Fan Assembly Fig. 5 Condensate Trap User Interface (optional timer available) Gas Tap Gas / Air Ratio Valve Electronics Housing Transformer Flow Pipe Connection Return Pipe Connection...

  • Page 6: Appliance Operation

    3.0 Appliance Operation Mains On. 1. Switched Live On: When the switched live switches on pump overrun occurs. Pump Overrun Pump Overrun 2. Pump Overrun: The pump is on while the fan, for 1 minute ? spark generator and gas valve are off. If at any stage during pump overrun the flow temperature is less than the set point and the flow switch is made then fan purge occurs.

  • Page 7: Technical Data

    Hydraulic Resistance Chart (75,000 Btu/hr). This can be altered to 30.18kW (102,980 Btu/hr) - see section 8.8. SEDBUK Declaration For 100 HE The efficiency is 90.9% This value is used in the UK Government’s Standard Assessment Procedure (SAP) for energy rating of dwellings. The test data from which it has been calculated has been certified by 0086.

  • Page 8: Dimensions And Fixings

    5.0 Dimensions and Fixings DIMENSIONS A 600mm 3° (1 in 20) B 320mm C 390mm D 125mm Ø Min. E 150mm F 125mm 360° Orientation The 3° (1 in 20) fall provided by the elbow is to allow condensate to run back to the boiler, for disposal through the condensate Tube Ø...

  • Page 9: System Details

    • It is important to check the inhibitor concentration after installation, system modification and at every service in accordance with the manufacturer’s instructions. (Test kits are available from inhibitor stockists.) • For information or advice regarding any of the above contact the Baxi Helpline.
  • Page 10 Flow Thermal Stores Return 1. When the 100 HE is fitted in conjunction with a thermal store, jumper 2 must be removed from the Alternative Low Head Installation Fig. 10 Control PCB, see Fig. 32a Section 8.8.
  • Page 11 Baxi Boilers accordance with the manufacturers instructions, the connecting pipe being unrestricted and not less...

  • Page 12: Site Requirements

    WARNING - The addition of anything that may interfere with the normal operation of the appliance without the express written permission Fig. 12 of Baxi UK Limited could invalidate the appliance warranty and infringe the G AFETY (Installation and Use) R EGULATIONS Clearances (Figs.
  • Page 13 7.0 Site Requirements Ventilation of Compartments 1. Where the boiler is installed in a cupboard or compartment, no air vents are required for cooling purposes providing that the minimum dimensions below are maintained. Sides 15mm 200mm Bottom 50mm Front 30mm 2.
  • Page 14 7.0 Site Requirements Flue Terminal Position with Minimum Distance (Fig. 17) (mm) A a Directly below an opening, air brick, opening NOTE: Due to the nature of the boiler a plume windows, etc. of water vapour will be discharged from the B a Above an opening, air brick, opening window etc.
  • Page 15 7.12 Vertical Flue Pictorial examples of flue runs where EQUIVALENT flue length equals 4m 1. Only a flue approved with the Baxi 100 HE can be used. 2. For information on vertical flues consult the Baxi High Efficiency Brochure or Notes for Guidance supplied with the vertical flue pack.
  • Page 16 Installation Guidance Notes for each flue system type. (Documents 243501 and 243502 for concentric and twin pipe respectively). Key Accessory Size Baxi Code Number Concentric Flue System 110mm diameter Straight extension kit 1000mm 241695 500mm...

  • Page 17: Installation

    8.0 Installation Rear Flue R/H Side Flue Template Check Site Requirements (section 7) before Template commencing. Flow & Return Initial Preparation Pipe Positions The gas supply, gas type and pressure must Centre Hole be checked for suitability before connection Vertical Flue (see Section 7.6).
  • Page 18 1. Remove the outer carton. 2. Remove the internal packaging. 3. Lift the outercase upwards and remove Outercase (Fig. 23). Baxi UK Limited declare that no substances harmful to health are contained in the appliance or used during appliance manufacture. Fig. 23...
  • Page 19 8.0 Installation Fitting The Boiler (Fig. 24) Retaining Bracket 1. Remove the screw and retaining bracket from the wall plate spring clip. 2. Offer up the boiler to the wall plate and locate the rear bottom edge onto the self locating support at the base of the wall plate.
  • Page 20 8.0 Installation Wall Thickness Making the Gas Connection 1. Connect the gas supply to the RC in BSPT internal) gas tap located on the lower right side of 3° the boiler. (1 in 20) Fitting The Flue Before fitting the flue, check the condensate drain integrity (see section 8.5).
  • Page 21 Gasket 13. If necessary fit a terminal guard (see Section 7.11). VERTICAL FLUEING 1. Only a flue approved with the Baxi 100 HE can be used. 2. For information on vertical flues consult the Fig. 30 Baxi High Efficiency Brochure or Notes for Guidance supplied with the vertical flue pack.
  • Page 22 8.0 Installation Making The Electrical Connections WARNING: This appliance must be earthed 1. The electrical connections are on the right hand side of the unit inside the electrical box. 2. Undo the two screws securing the electrical box cover and remove the cover (Fig. 31). 3.

  • Page 23: Electrical

    9.0 Electrical Schematic Wiring Diagram Control Connector with blue label bk bk b bk w v b g y o r bk Ignition Dry Fire Flow Switch Interface PCB Sensing Electrode Transformer Valve Thermistor Condensate Fan Protection Trap Stat Spark Electrode Safety Stat N P/F...
  • Page 24 9.0 Electrical Illustrated Wiring Diagram Flow Switch Interface Sensing Electrode Flow Temperature Thermistor Control w b y r v g o bk Condensate Trap Fan Protection Thermostat Connector with blue label Ignition Safety Thermostat Valve Earth Transformer Mains Spark and Input Earth Electrode Wiring Key...

  • Page 25: Commissioning The Boiler

    10.0 Commissioning the Boiler 10.1 Commissioning the Boiler 1. Reference should be made to BS 5449 Section 5 when commissioning the boiler. 2. Flush the whole system using a suitable flushing agent (see Section 6.2) and vent the radiators. Check for water leaks. 3.

  • Page 26: Fitting The Outer Case

    11.0 Fitting the Outer Case 11.1 Fitting The Outer Case 1. Position the outercase over the boiler engaging the lugs in the side flanges over the hooks on the wall plate (Fig. 37). 2. Using the two screws supplied in the kit, secure the outercase to the combustion box (Fig.

  • Page 27: Servicing The Boiler

    PCB remains live. Therefore it is important to isolate the electrical supply. 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 28 12.0 Servicing the Boiler 12.1 Annual Servicing (Cont) NOTE: General cleaning can be undertaken using a vacuum. However debris should only be gently blown off the burner skin due to its fragile nature. 10. To clean the heat exchanger and burner proceed as follows: a) Disconnect the electrical leads to the fan component protection sensor (Fig.

  • Page 29: Changing Components

    When the boiler control knob is switched off the control PCB remains live. Therefore it is important to isolate the electrical supply. 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...
  • Page 30 13.0 Changing Components Washer Securing 13.3 Interface PCB Control Knob 1. Pull the control knob off the spindle and remove the securing nut and washer (Fig. 47). 2. Release the electrical box securing screw and hinge the electrical box down (Fig. 48). Electrical Box Fig.
  • Page 31 13.0 Changing Components The control and ignition boards can be accessed on the removal of the main Electrical Box Cover electrical box cover. 1. Remove the two screws securing the main electrical box cover (Fig. 51). 13.5 Control Board (Fig. 52) 1.
  • Page 32 13.0 Changing Components The fan and venturi, gas valve, injector pipe, condensate trap, fan protection sensor, spark and sensing electrodes can be accessed and changed on the removal of the airbox door panel. 1. Remove the airbox door panel by loosening the four turn screws (Fig.
  • Page 33 13.0 Changing Components The removal of the fan is necessary to enable the changing of the injector pipe, condensate trap and gas valve (see section 13.9). 13.10 Injector Pipe (Fig. 58) 1. Remove the injector pipe by pulling out from the ‘O’...
  • Page 34 13.0 Changing Components Combustion Box The burner and heat exchanger can be Door Panel changed after removal of the combustion box door. To change the heat exchanger, the fan and burner must be removed first (see section 13.9). 1. Remove the combustion box door by removing the four securing screws (Fig.
  • Page 35 13.0 Changing Components 13.15 Heat Exchanger Lower Insulation (Fig. 65) 1. Remove all components in the base of the airbox. 2. Remove the burner (see section 13.13). 3. Remove the four bolts securing the combustion box base. 4. Remove the combustion box base. 5.

  • Page 36: Fault Finding

    14.0 Fault Finding HIGH Go to Mains LED MAINS LED OFF off ? section of the fault finding instructions. Mains On Boiler On (Green) (Yellow) Go to Mains LED MAINS LED FLASHING Overheat or Control flashing ? section of the fault finding Knob Lockout (Red) instructions.
  • Page 37 Mains LED Off 14.0 Fault Finding boiler supply Replace with 3A fuse. fuse OK ? Is there 230 V at mains No mains supply to input terminal boiler. block (A) ? there 230 V at Wiring from mains input mains input connection terminal block to control to control PCB PCB faulty.
  • Page 38 14.0 Fault Finding Mains LED Flashing control knob Switch on on ? wiring from control Rectify wiring. PCB to interface PCB OK (F) ? Does boiler Replace control PCB. produce heat ? Replace interface PCB. Control Connector with blue label bk bk w v b g y o r bk b bk...
  • Page 39 14.0 Fault Finding Dry-fire Lockout Is there Fill system and water in system and pump on ? switch pump on. flow switch short Replace control PCB. circuit (G) ? flow switch Replace flow switch. blocked ? Replace control PCB. Control Connector with blue label...
  • Page 40 14.0 Fault Finding Safety Lockout Thermistor Open Circuit Open circuit across Replace thermistor thermistor When connections ? flow temp < 60°C. Safety thermostat Replace safety open circuit ? (measured at thermostat (black) safety thermostat) Open circuit Wiring from across thermistor thermistor to logic connections on PCB faulty...
  • Page 41 14.0 Fault Finding No Fan No Lockout Reset flow temperature Replace flow thermistor between 0.5kΩ Flow overheat temperature and 20kΩ ? (measured at thermostat will not flow temperature flow temperature thermistor (red) thermistor) reset until flow > 60° C ? temperature <...
  • Page 42 The polarity of the 14.0 Fault Finding 230V S/L-N & L-E mains input to the at mains input boiler is reversed. This terminal block ? Ignition Lockout must be rectified. there at least Incorrect gas 18.1 mb dynamic at supply to boiler. gas valve inlet ? Clear blockage and...
  • Page 43 14.0 Fault Finding Control Connector with blue label bk bk b bk w v b g y o r bk Ignition Dry Fire Flow Switch Interface PCB Sensing Electrode Transformer Valve Thermistor Condensate Fan Protection Stat Trap Spark Electrode Safety Stat N P/F Mains Optional...

  • Page 44: Short Parts List

    15.0 Short Parts List Short Parts List G.C. Description Manufacturers Part No. E06 058 Flow Temperature Thermistor (Red) 240670 E06 059 Flow Switch 242459 E06 060 Safety Thermostat (Black) 242235 E06 064 Control PCB 5106789 E06 065 Ignition PCB 241838 E06 066 Transformer 240236...
  • Page 45 16.0 Notes...
  • Page 46 16.0 Notes...
  • Page 47 Baxi UK Limited manufacture a comprehensive range of products for the domestic heating market. Gas Central Heating Boilers (Wall, Floor and Fireside models). Independent Gas Fires. Renewal Firefronts. Gas Wall Heaters. Solid Fuel Fires. If you require information on any of these products,...

  • Page 48: After Sales Service

    Comp N 5106739 - Iss 4 - 9/02 After Sales Service 08706 096 096 Technical Enquiries 08706 049 049 Baxi UK Limited Brownedge Road Bamber Bridge Preston Lancashire PR5 6SN www.baxi.com...

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