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Baxi 741FS, Installer'S Manual

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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
combustible cladding
removal and that this area is
increased by at least 2mm
all round.

5.1.3

 Soundness for appliance attachment

Two primary methods of retaining the appliance are provided: -
1)

By fixing to the fireplace front surround.

2)

Using concealed tension cables fixed to the rear of the fireplace opening together

with secondary fixing to the fireplace floor.
The methods are detailed in section 9 of this manual. Before selecting the retention
method, consult with the customer. Method 2 is provided for instances where drilling
holes in the front surface of the fireplace surround is unacceptable to the customer or
otherwise impractical. 

N.B. It is unwise to attempt to drill into marble without the

proper tools and equipment

.

If method 1 is chosen, make sure that the front surround area is sound enough to take
the fibre plugs and woodscrews. If necessary, make sound with a suitable cement.
If method 2 is chosen, make sure that the areas at the back and towards the centre of the
fireplace floor are sound enough to take the eyebolts and screws. If these areas have
deteriorated due to prolonged use, they should be made sound with a suitable cement.

5.1.4

Installations using a metal flue box

The whole of the top surface of the metal flue box must be covered with a 100mm layer
of mineral wool or equivalent insulation (See figure 2).

5.2 Fireplace flue pull.

Close all doors and windows in the room in which the appliance is to be installed. After
confirming with a match that smoke is drawn into the flue, light a 13 gram smoke pellet
and check that there is a definite flow through the flue. Verify outside that the smoke
exits from one terminal only and that the termination is suitable. Observe, where
possible, upstairs rooms and loft spaces for signs of escaping smoke indicating a

Page 14

INSTALLER GUIDE

Figure 7. Fireplace area.

Summary of Contents for 741FS

Page 1: ... 231 INSTALLER Please leave this guide with the owner 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 Ba...

Page 2: ...urer is a member of the Society of British Gas Industries which works to ensure high standards of safety quality and performance Careful Installation The manufacturer is a CORGI registered company This gas fire must be installed by a competent CORGI Registered Installer in accordance with our Installer Guide and should not be fitted directly on to a carpet Baxi Fires Division Erdington Birmingham ...

Page 3: ...C FUEL EFFECT 24 14 FULL OPERATING CHECKS 24 15 FINAL REVIEW 27 16 SERVICING PARTS REPLACEMENT 28 16 1 Checking the aeration setting of the burner 29 16 2 To remove the ignition microswitch 29 16 3 To remove the gas shut off microswitch 29 16 4 To remove the fascia 30 16 5 To replace the control slide unit 30 16 6 To replace the control slide button 30 16 7 To remove the burner unit 31 16 8 To rem...

Page 4: ...bres RCF which are man made vitreous silicate fibres Excessive exposure to these materials may cause irritation to eyes skin and respiratory tract Consequently it is important to take care when handling these articles to ensure that the release of dust is kept to a minimum To ensure that the release of fibres from these RCF articles is kept to a minimum during installation and servicing we recomme...

Page 5: ...relevant codes of practice The relevant parts of the current editions of the following British Standards BS 715 BS 1251 BS 1289 Part 1 BS 1289 Part 2 BS EN 1806 BS 4543 Part 2 BS 5440 Part 1 BS 5440 Part 2 BS 5871 Part 2 BS 6461 Part 1 BS 6891 BS 8303 In England and Wales the current edition of the Building Regulations issued by the Department of the Environment and the Welsh Office Page 5 INSTALL...

Page 6: ...he fireback and sufficient material behind the fireback for a debris catchment space The required fireplace hearth debris catchment area and clearance dimensions are shown in figure 1 3 2 1 1 Hole in the wall installations It is recommended that a hearth should be installed as in figure 1 If a reduced depth hearth is fitted the fire must be installed so that the distance from the base of the firep...

Page 7: ...e cracking of the surround back or marble 3 3 Suitable flues and minimum flue sizes are as follows It should be noted that as with many appliances sharp bends or horizontal runs in metal flues at the top of the system can be a cause of problems in these types of installation 225mm x 225mm conventional brick flue 175mm diameter lined brick or stone flue 200mm diameter factory made insulated flue ma...

Page 8: ...r soundness and freedom from blockages 3 8 If the fireplace opening is an underfloor draught type it must be sealed to stop any draughts 3 9 Note that soft wall coverings e g embossed vinyl etc are easily affected by heat They may scorch or become discoloured when close to a heating appliance Please bear this in mind when installing 3 10 The front face of the fireplace should be reasonably flat ov...

Page 9: ...rformance of the appliance Note the spillage test requirements detailed further on in this manual If the fan is likely to affect the appliance the appliance must not be installed unless the fan is permanently disconnected 3 14 Normal adventitious ventilation is usually sufficient to satisfy the ventilation requirements of this appliance In GB reference should be made to BS 5871 Part 2 and in IE re...

Page 10: ... 170mm 3 19 The minimum allowable distance from the outside of the appliance fascia to a corner wall having combustible material or any other combustible surface which projects beyond the front of the appliance is shown in figure 5 A 10mm access clearance from a non combustible surface is necessary at the left side See figure 5 3 20 The appliance is fitted with an A S D Atmosphere sensing device I...

Page 11: ...ey Description Dimension mm A Appliance height mm 606 B Appliance width mm 518 C Appliance depth into room mm 85 D Minimum mandatory clearance to combustible surfaces projecting beyond the front of appliance mm 108 E Recommended clearance to non combustible surfaces for access purposes mm 108 See graph 1 ...

Page 12: ...dscrews 2 Fire retaining cables 2 Cable clamps 4 Eyebolts 1 Rubber grommet 1 PP3 Battery 1 Knurled shouldered screw For control linkage fixing 1 Smoke match tube 2 Fireback spacing brackets 1 Rear ceramic wall support bracket 1 Length of self adhesive foam seal 1 Self adhesive control position label 1 Literature pack 1 Slider control unit 2 Taptite or countersunk screws For Slider control unit 2 F...

Page 13: ...a shown in figure 7 must be kept clear of obstructions 5 1 2 Fireplace general condition The fireplace floor should be reasonably flat to ensure that the hotbox can be installed without it rocking and so that a good seal can be made at the bottom front of the box The front face of the fireplace should be reasonably flat over the area covered by the hotbox top and side flange seals to ensure good s...

Page 14: ... to drill into marble without the proper tools and equipment If method 1 is chosen make sure that the front surround area is sound enough to take the fibre plugs and woodscrews If necessary make sound with a suitable cement If method 2 is chosen make sure that the areas at the back and towards the centre of the fireplace floor are sound enough to take the eyebolts and screws If these areas have de...

Page 15: ...llowing checks Check condition of battery and that it is correctly fitted If the above is satisfactory check the ignition circuit and components see the servicing section in this manual 7 GAS SUPPLY CONNECTION A nut and olive are provided for an 8mm pipe inlet connection to the T connector at the bottom front of the appliance The T connector can be rotated to allow a connection from any direction ...

Page 16: ...tion only 4 Pierce the grommet to allow the pipe to pass through it The grommet should envelop the pipe If the hole is larger than the pipe seal it with tape Do not pierce the grommet unless the supply pipe is to pass through it 5 The appliance is supplied with two fireback spacers Do not fit the fireback spacers if the fire is to be installed into a precast or clay flue block system as in section...

Page 17: ...ere is a length of self adhesive foam seal supplied with the fire This will need to be fitted to the outer rear edges of the side and top flanges of the hotbox Be careful not to stretch the seal when measuring Remove the protective backing from the foam seal and fit this to the flanges See figure 15 Ensure that there is no gap between the foam seals where they meet at the top flange See figure 15 ...

Page 18: ...ws If necessary make sound with a suitable cement 2 Place the hotbox centrally in the fireplace in the position in which it is to be permanently installed 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 3 Mark the fireplace front surround through the four fixing holes in the side flanges of the hotbox...

Page 19: ...les in the rear wall of the fireplace for the eyebolt plugs The holes should be drilled within the range of positions shown in figure 19 using a no 12 masonry drill The holes should be equidistant each side of the centre line of the fireplace to ensure that the appliance finishes centrally in the opening when tension is applied to the cables 3 Insert a fibre plug into each hole Use the fibre plugs...

Page 20: ...loor through each of the two holes in the base of the hotbox using a no 12 masonry drill See figure 22 9 Insert a fibre plug into each hole Use the fibre plugs supplied with this appliance Never use plastic plugs instead of the fibre plugs supplied Fit a woodscrew in each plug and tighten Always screw the base into position before applying tension to the cables This will ensure a tight seal betwee...

Page 21: ... the cables into the gap between the inner and outer back panels so that they are available to allow easy removal and refitting of the appliance during subsequent service calls Do not cut off the free lengths of cable On precast flue installations feed the cables into the small holes at the base of the side panels See figure 23 9 3 Sealing floor front All installations Using the floor sealing tape...

Page 22: ...electronically generated sparks should light the pilot The pilot should then light the main burner at its low setting There may be a delay of up to four seconds between the pilot lighting and ignition of the gas at the main burner This is normal and is due to the time required to fill the main burner compartment with sufficient gas for ignition 3 When the burner is operating properly gradually tur...

Page 23: ...LLATION 1 Fit the ceramic rear wall inside the L bracket on the back face of the burner compartment Push the ceramic wall flat against the back face of the burner compartment See figure 27 2 Fit the ceramic side walls against the side faces of the burner compartment The bottom edges of the walls should rest in the ledges at the sides of the firebox Slide them in from the front and ensure that they...

Page 24: ...ust always be used 13 FITTING THE CERAMIC FUEL EFFECT The fitting guide for the ceramic fuel effect is supplied with the ceramic fuel effect It is important that the fitting guide for the ceramic fuel effect be placed inside or attached to this guide and handed to the customer following completion of the final review section 14 FULL OPERATING CHECKS 14 1 Check the control settings The control posi...

Page 25: ...er should be at its maximum setting at the high heat position shown in figure 30 You should feel a check to the button movement at this position 6 Slide the control button up past the high heat position to the off O position at the top of the slide slot Both pilot and main burner should go out While cooling the ceramic fuel effect may make some crackling noises This is quite normal 14 2 Check for ...

Page 26: ... spillage or poor ventilation Check that the system operates properly as follows 1 Light the appliance Set the slide control to the maximum burning position and leave for one minute 2 Set the control to the low burning position Isolate the gas supply at the inlet T connector The pilot and main burner will go out Note the time when the pilot goes out Listen for a snap sound at the gas tap Note the ...

Page 27: ...thorised spares Warn that ignoring this advice could cause incomplete clearance of the products of combustion with consequent health hazards 6 Advise the customer that the appliance will operate to its maximum potential if the flue is primed during the first 20 30 minutes of use To do this simply slide the control to its highest setting This will also burn off any carbon deposits that may have for...

Page 28: ...ecommend that the replaced items are not broken up but are sealed within a heavy duty polythene bag clearly labelled as RCF waste This is not classified as hazardous waste and may be disposed of at a tipping site licensed for the disposal of industrial waste Protective clothing is not required when handling these articles but we recommend you follow the normal hygiene rules of not smoking eating o...

Page 29: ... two screws 5 Replace in the reverse order Check that the microswitch operates correctly by fully closing it and observing that there are sparks at the pilot electrode 16 3 To remove the gas shut off microswitch See figures 33 34 35 The gas shut off microswitch is stamped V4NT9C2YCGPX or V4NT9C2YCAUX 1 Remove the fascia as in section 16 4 2 Detach the microswitch cover by removing one screw and pu...

Page 30: ...r Make sure that the fascia is properly located over the upper retaining brackets 16 5 To replace the control slide unit 1 Remove the fascia See section 16 4 2 Detach the slide unit by removing two screws securing the plastic slide mechanism to the rear of the fascia See figure 39 3 Replace in the reverse order 16 6 To replace the control slide button 1 Remove the fascia See section 16 4 2 Remove ...

Page 31: ...e the battery 4 Remove the spark lead 5 Unscrew the four support bracket screws See figure 41 The generator and its support bracket can now be moved forward Be careful not to apply tension to the microswitch leads 6 Remove the two fixing screws that attach the generator unit to the support bracket The igniter generator can now be removed See figure 41 7 Remove the two leads to the switch and remov...

Page 32: ...Detach the electrode lead from the underside of the electrode tab 6 Remove the two screws securing the pilot unit See figure 42 7 Refit in the reverse order Note 1 The pilot unit is an atmosphere sensing device It must be replaced as a whole assembly Its individual components are not separately replaceable 2 When the thermocouple is removed from the interrupter block the microswitch lead terminals...

Page 33: ...ch wires are properly secured to give a good electrical contact 16 12 To remove the gas flow rate controller See figure 44 1 Remove the burner unit See section 16 7 2 If lying the burner on its back ensure that the work surface is suitably protected This will avoid damage to the work surface 3 Detach the microswitch cover See section 16 2 paragraph 2 4 Detach the shut off tap as detailed in sectio...

Page 34: ...ove the burner See section 16 13 2 Remove the burner clamping screw See figure 46 3 Unscrew the injector from the burner 4 Refit in the reverse order 16 15 To remove the appliance from the fireplace 1 Remove the burner unit See section 16 7 2 If the fire retention is as method 1 See section 9 1 of installation instructions remove the screws If the fire retention is as method 2 See section 9 2 of i...

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