Baxi 741FS Installer's Manual
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Baxi 741FS Installer's Manual

Baxi 741FS Installer's Manual

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5110263/01
INSTALLER GUIDE
Model 741FS
Heat Engine
(GC No. 32-032-56)
INSET LIVE FUEL EFFECT GAS FIRE
INCORPORATING THE
CONTROL
THIS APPLIANCE IS FOR USE WITH NATURAL GAS (G20).
WHEN CONVERTED USING CONVERSION KIT NO. 0595211 THIS
APPLIANCE IS FOR USE WITH PROPANE GAS (G31).
THIS APPLIANCE IS SUITABLE ONLY FOR INSTALLATION IN THE UNITED
KINGDOM (GB) AND THE REPUBLIC OF IRELAND (IE).
We trust that this guide gives sufficient details to enable this appliance to be installed
and maintained satisfactorily. However, if further information is required please
telephone 01302 349 231 .
owner
INSTALLER: Please leave this guide with the
© Baxi Heating U.K. Ltd.

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  • Page 1 We trust that this guide gives sufficient details to enable this appliance to be installed and maintained satisfactorily. However, if further information is required please telephone 01302 349 231 . owner INSTALLER: Please leave this guide with the © Baxi Heating U.K. Ltd.
  • Page 2 Installer Guide and should not be fitted directly on to a carpet. Baxi Fires Division, Erdington, Birmingham B24 9QP Because our policy is one of constant development and improvement, details may vary slightly from those given in this publication...

  • Page 3: Table Of Contents

    INSTALLER GUIDE CONTENTS Section Heading Page 1. SAFETY 2. APPLIANCE DATA 3. GENERAL INSTALLATION REQUIREMENTS 4. PACK CONTENTS 5. FIREPLACE CHECK 6. IGNITION CHECK 7. GAS SUPPLY CONNECTION 8. PREPARING APPLIANCE FOR INSTALLATION 9. HOTBOX INSTALLATION 9.1 Method 1 - Front fixing to fireplace surround. 9.2 Method 2 - Cable retention and floor fixing.

  • Page 4: Safety

    INSTALLER GUIDE 1. SAFETY Installer Before continuing any further with the installation of this appliance please read the following guide to manual handling: ! The lifting weight of this heat engine and burner assembly is 8.5kg. ! One person should be sufficient to lift the fire. If for any reason this weight is considered too heavy then obtain assistance.

  • Page 5: General Installation Requirements

    INSTALLER GUIDE Natural (G20) Propane (G31) * Inlet Pressure 20mbar 37mbar Input - Max. (Gross) 6.85kW (23,400 Btu/h) 6.7kW (22,860 Btu/h) Input - Min. (Gross) 2.7kW (9,410 Btu/h) 4.3kW (14,670 Btu/h) 20.0 ± 1.0mbar (8.0 ± 0.4in 37.0 ± 1.0 mbar (14.85 ± Inlet Test Pressure (Cold) w.g.) 0.4in w.g.)
  • Page 6 INSTALLER GUIDE In Scotland, the current edition of the Building Standards (Scotland) Regulations issued by the Scottish Executive. In Northern Ireland, the current edition of the Building regulations (Northern Ireland) issued by the Department of the Environment for Northern Ireland. In the republic of Ireland the installation must be carried out by a competent person and also conform to the relevant parts of: The current edition of IS 813 “Domestic Gas Installations”...
  • Page 7 INSTALLER GUIDE 3.2.3 To a precast concrete or clay flue block system conforming to BS1289 with dimensions as in figure 3. The current versions of BS1289 and BS EN 1806 recommend that there should be an air space or insulation between the flue blocks and the plaster because heat transfer may cause cracking on directly plastered...
  • Page 8 INSTALLER GUIDE 3.4 The flue must conform to BS 5440: Part 1 in design and installation. The flue, measured from the bottom of the fireplace opening to the bottom of the terminal, shall be not less than 3m in actual vertical height. When calculated in accordance with BS 5440: Part 1 Annex A, the minimum equivalent height of the flue shall be...
  • Page 9 INSTALLER GUIDE must be at least 12mm thick. The periphery of the hearth (or fender) should be at least 50mm above floor level to discourage the placing of carpets or rugs over it. The surface of the hearth must be sufficiently flat to enable the bottom of the fascia and the bottom front cover to be aligned horizontally.
  • Page 10 INSTALLER GUIDE 3.16 Propane gas appliances must not be installed in a room that is built entirely below ground level (See BS 5871 Part 2). 3.17 If the appliance is to be fitted against a wall with combustible cladding, the cladding must be removed from the area covered by the fascia.
  • Page 11 INSTALLER GUIDE See graph Dimension Description (mm) Appliance height (mm) Appliance width (mm) Appliance depth into room (mm) Minimum mandatory clearance to combustible surfaces projecting beyond the front of appliance (mm). Recommended clearance to non-combustible surfaces for access purposes (mm). Figure 5.

  • Page 12: Pack Contents

    INSTALLER GUIDE 4. PACK CONTENTS The items required for this appliance are packed as below (See figure 6) 1 Burner and hotbox unit. 1 Nut and olive for 8mm inlet pipe. 1 Inlet ‘T’ connector and pressure test point. 1 Flue restrictor plate. 2 Screws (For flue restrictor).

  • Page 13: Fireplace Check

    INSTALLER GUIDE Figure 6. Pack contents 5. FIREPLACE CHECK 5.1 Fireplace check. 5.1.1 Fireplace size The fireplace must comply with the requirements described in section 3.2. This will probably entail removing the fireback and infill material behind the fireback. On conventional fireplace openings the debris catchment area shown in figure 7 must be kept clear of obstructions.
  • Page 14 INSTALLER GUIDE good if necessary. If the appliance is to be fitted against a wall with combustible cladding, the cladding must be removed from the area covered by the fascia. The cladding must also not touch the fascia (See figure 4). We suggest that the actual fascia is used as a template to mark the area for...

  • Page 15: Ignition Check

    INSTALLER GUIDE defective flue. If there is not a definite flow warm the flue for a few minutes and repeat the smoke pellet test. If there is still no definite flow the flue may need remedial work – Do not fit the appliance until there is a definite flow through the flue. 6.

  • Page 16: Preparing Appliance For Installation

    INSTALLER GUIDE hotbox must be kept away from the area which will be taken by the hotbox when it is installed (See figure 7). Note that the centre of the appliance inlet ‘T’ connector is 25mm above the fireplace floor. The inlet ‘T’ connector should be fitted to the supply pipe at this stage. 8.
  • Page 17 INSTALLER GUIDE There may however, be certain exceptional circumstances where fitting the restrictor causes the fire to fail the spillage test. In such cases the restrictor will have to be removed. After removal conduct the spillage check again. The restrictor is packed loose with the appliance and is fixed with two screws (See figure 13).

  • Page 18: Hotbox Installation

    INSTALLER GUIDE Figure 15. Fitting the foam seal Figure 16. Fitting the rear ceramic support. 10. Fit the two surround securing brackets to the convection box side flanges with the screws supplied. Note the different orientation of the brackets at left and right sides (See figure 17) RIGHT LEFT...

  • Page 19: Method 2 - Cable Retention And Floor Fixing

    INSTALLER GUIDE 4. Remove the hotbox. Drill four holes in the fireplace front surround at the marked positions using a no.12 masonry drill. 5. Insert a fibre plug into each hole. 6. Place the hotbox back in position in the fireplace.
  • Page 20 INSTALLER GUIDE through the back of the hotbox. If a concealed connection is being used, insert the hotbox into the fireplace feeding the supply pipe through the pierced hole in the rear grommet. 5. The hotbox has two holes at each side of the spillage plate.

  • Page 21: Sealing Floor Front - All Installations

    INSTALLER GUIDE 13. If the hotbox is not correctly aligned, release the tension on the Side entry Rear entry cables by slackening the screws and turning the hexagonal adjusters fully anticlockwise. The hotbox should then automatically realign itself. Pull each cable taut again and push the cable retainers back against the back panel / side panel.

  • Page 22: Burner & Supply Pipe Installation

    INSTALLER GUIDE 10. BURNER & SUPPLY PIPE INSTALLATION 10.1 Burner and supply pipe installation. 1. Fit the burner unit to the hotbox with two screws previously removed. 2. Connect the supply line to the appliance. 3. Turn on the gas supply and pressure check the installation pipework for gas soundness.

  • Page 23: Ceramic Walls Installation

    INSTALLER GUIDE and set at maximum output. 2. After checking, turn off the appliance. Remove the pressure gauge and replace the test point sealing screw. 3. Light the appliance. Turn to the maximum output position and test around the sealing screw for gas soundness with a suitable leak detection fluid.

  • Page 24: Fitting The Fascia

    INSTALLER GUIDE 12. FITTING THE FASCIA There is a self adhesive control position label and control slider assembly supplied with this fire. These should be fitted to the fascia as shown in the fascia fitting guide. The fitting guide for the fascia is supplied with the fascia and the fascia should be fitted in accordance with it.
  • Page 25 INSTALLER GUIDE When operating the fire for the first time, some vapours may be given off which could set off smoke alarms in the vicinity. These vapours are quite normal with new appliances. They are totally harmless and will disappear after a few hours use. 1.
  • Page 26 INSTALLER GUIDE remove the restrictor, reseal the appliance and retest. If smoke is still not drawn into the appliance disconnect the appliance and seek expert advice. 5. If the above test is satisfactory open all internal connecting doors, hatches, etc. in the room.

  • Page 27: Final Review

    INSTALLER GUIDE 15. FINAL REVIEW 1. If a gap is visible between the inner sides of the fascia and the ceramic side walls, gently slide the walls forward. 2. Visually inspect the appliance. Clean off any marks incurred during installation. 3.

  • Page 28: Servicing & Parts Replacement

    INSTALLER GUIDE 16. SERVICING & PARTS REPLACEMENT Always turn off the gas supply and allow the appliance to cool completely before commencing any servicing (The appliance inlet ‘T’ connector incorporates an isolating valve). It is recommended that, at least once a year, the appliance is disconnected and the fireplace opening checked and cleared of any debris.

  • Page 29: Checking The Aeration Setting Of The Burner

    INSTALLER GUIDE 16.1 Checking the aeration setting of the burner. 1. The aeration shutter is factory set and will require It is important to ensure that the aeration adjustment. setting is correct (See figure 32). 2. To adjust the aeration setting, loosen the two aeration shutter screws, slide the aeration shutter to the position shown in figure 32 and tighten the fixing screws.

  • Page 30: To Remove The Fascia

    INSTALLER GUIDE 16.4 To remove the fascia. 1. Remove the bottom front cover. 2. Detach the control-linking bar from the control pivot bracket by removing the knurled screw, which joins the control linking bar to the control pivot unit (See figure 36). 3.

  • Page 31: To Remove The Burner Unit

    INSTALLER GUIDE 16.7 To remove the burner unit. 1. Remove the fascia (See section 16.4). 2. Remove the ceramic fuel effect 3. Support the inlet ‘T’ connector to avoid straining the pipework and disconnect the appliance from the inlet ‘T’ connector. 4.

  • Page 32: To Remove The Thermocouple Interrupter Block

    INSTALLER GUIDE 16.9 To remove the thermocouple interrupter block. (See figure 35). 1. Remove the burner unit (See section 16.7). 2. Detach the thermocouple from the interrupter block by unscrewing the thermocouple nut. 3. Detach the two microswitch leads from the interrupter block. 4.

  • Page 33: To Remove The Gas Flow Rate Controller

    INSTALLER GUIDE controller. Lift the tap (complete with elbow) clear. 7. Loosen the hexagonal locknut securing the elbow to the tap. Remove the elbow by rotating it. 8. If fitting a new tap, remove the hexagonal nut at the mounting bracket end of the old tap and fit to the replacement tap.

  • Page 34: To Replace The Burner

    INSTALLER GUIDE 8. Detach the control pivot bracket. 9. Remove the hexagonal nut securing the controller to the front mounting bracket and remove the flow rate controller. 10. Refit in the reverse order. 16.13 To replace the burner. (See figure 45). 1.

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