Baxi 939 Instruction Manual

5116231/06
© Baxi Heating U.K. Limited 2009.
Model 939
OPEN DECORATIVE GAS FIRE
(GC No. 32-032-54)
INSTALLER: Please leave this guide with the owner
INSTALLATION AND OWNER GUIDE
We trust that this guide gives
sufficient details to enable this
appliance to be installed and
maintained satisfactorily. However, if
further information is required, our
Technical Helpline will be pleased
to help.
Telephone [phone] (National
call rates apply in the United
Kingdom).
In the Republic of Ireland
Telephone [phone].

Baxi Heating U.K. Limited 2009.
All rights reserved. No part of this publication may be reproduced in any material form
(including photocopying), stored in any medium by electronic means (including in any
retrieval system or database) or transmitted, in any form or by any means, whether
electronic, mechanical, recording or otherwise, without the prior written permission of
the copyright owner.
Applications for the copyright owner's permission to reproduce any part of this
publication should be made, giving details of the proposed use, to the following
address: The Company Secretary, Baxi Heating UK Limited, The Wyvern Business
Park, Stanier Way, Derby, DE21 6BF.
Warning: Any person who does any unauthorised act in relation to a copyright work
may be liable to criminal prosecution and civil claims for damages.
Valor Fires, Erdington, Birmingham B24 9QP
www.firesandstoves.co.uk
Because our policy is one of constant development and improvement, details may vary slightly from
those given in this publication.
Page 2
© Baxi Heating U.K. Limited 2009.
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).

Safety First.
This fire is CE Approved and designed to meet the appropriate British Standards and
Safety Marks.
Quality and Excellence.
This fire has been manufactured to the highest standards of quality and excellence
and manufactured under a BS EN ISO 9001 quality system accepted by the British
Standards Institute.
The Highest Standards
The manufacturer is a member of SBGI and HHIC (Heating and Hot water Industry
Council) that work to ensure high standards of safety, quality and performance.
Careful Installation
This gas fires must be installed by a competent GAS SAFE REGISTER engineer
(GAS SAFE REGISTER or CORGI engineer outside of UK) in accordance with our
installer guide and should not be fitted directly on to a carpet or floor of combustible
material.
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© Baxi Heating U.K. Limited 2009.

Page 4
© Baxi Heating U.K. Limited 2009.
INSTALLER GUIDE
FOR OWNER GUIDE SEE PAGES 29 TO 43
INSTALLER GUIDE

CONTENTS
Section Heading Page
INSTALLER GUIDE 4 - 28
OWNER GUIDE 29 - 43
1. SAFETY AND UNPACKING 7
2. LIST OF ACCESSORIES 8
3. APPLIANCE DATA AND EFFICIENCY 9
3.1 General information. 9
3.2 Efficiency. 9
4. GENERAL INSTALLATION REQUIREMENTS 10
4.1 Regulations, Standards and Law. 10
4.2 Ventilation requirements. 12
4.3 The Atmosphere sensing device (ASD). 12
4.4 Fireguard requirements. 12
4.5 Room considerations. 12
4.6 Chimney preparation. 12
4.7 Fireplace preparation. 13
4.8 The hearth. 13
4.9 Fireplace clearances. 14
4.10 Installation options. 15
4.11 Propane appliances. 16
5. UNPACKING 18
6. INSTALLATION OF APPLIANCE 18
6.1 Fireplace size. 18
6.2 Fireplace flue pull. 18
6.3 Installation of the burner unit 19
7. BURNER AND SUPPLY PIPE INSTALLATION 21
7.1 Preliminary burner checks. 21
7.1.1 Lighting the fire 21
7.1.2 Operating the burner. 21
7.1.3 Checking the inlet pressure. 22
8. FITTING THE FIREFRONT 22
9. FITTING THE CERAMIC FUEL EFFECT 24
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© Baxi Heating U.K. Limited 2009.
INSTALLER GUIDE
Continued on next page

CONTENTS (Continued)
Section Heading Page
10. FULL OPERATING CHECKS 24
10.1 Spillage check. 24
10.2 Flame Supervision & Spillage Monitoring System. 25
10.3 Final Review. 25
11. SERVICING & PARTS REPLACEMENT 26
11.1 Checking the aeration setting of the burner. 26
11.2 To remove the complete burner unit. 26
11.3 To remove the pilot unit. 27
11.4 To remove the gas valve. 27
11.5 To remove the piezo generator. 28
11.6 To grease the control tap. 28
11.7 To replace the burner. 28
11.8 To remove the main burner injector. 28
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© Baxi Heating U.K. Limited 2009.
INSTALLER GUIDE

1. SAFETY AND UNPACKING
Installer
Before continuing any further with the installation of this appliance please read
the following guide to manual handling:
The lifting weight of this appliance (DGF burner) is 2 kg. One person should be
sufficient to lift the fire. If for any reason this weight is considered too heavy
then obtain assistance.
When lifting always keep your back straight. Bend your legs and not your back.
Avoid twisting at the waist. It is better to reposition your feet.
Avoid upper body/top heavy bending. Do not lean forward or sideways whilst
handling the fire.
Always grip with the palm of the hand. Do not use the tips of fingers for support.
Always keep the fire as close to the body as possible. This will minimise the
cantilever action.
Use gloves to provide additional grip.
Always use assistance if required.
This product uses fuel effect pieces containing Refractory Ceramic Fibres
(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 recommend that you use a HEPA filtered vacuum to remove any
dust and soot accumulated in and around the fire before and after working on
the fire. When replacing these articles we recommend that the replaced items
are not broken up, but are sealed within a heavy duty polythene bag, clearly
labelled as RCF waste. RCF waste is classed as a stable, non-reactive
hazardous waste and may be disposed at a landfill licensed to accept such
waste. Protective clothing is not required when handling these articles, but we
recommend you follow the normal hygiene rules of not smoking, eating or
drinking in the work area and always wash your hands before eating or
drinking.
This appliance does not contain any component manufactured from asbestos
or asbestos related products.
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© Baxi Heating U.K. Limited 2009.
INSTALLER GUIDE

2. LIST OF ACCESSORIES
Valor and B&Q models
Description Part Number
All Models
LPG Conversion kit 0595211
‘Quattro’ / ‘Anthem’, ‘Majestic’ and Models not supplied with a firefront
Replacement Chair brick 0552311
Replacement Chair brick Trims
 Flat Brass effect 0552321
 Flat Satin Chrome effect 0552331
 Flat Black 0552341
‘Azure’ Model
Replacement Chair brick 0552301
Wonderfire models
Wonderfire ‘Gasflame 3 Convector box’ and 16inch Wonderfire Models
Replacement Chair brick 0552311
Replacement Chair brick Trims
 Flat Brass effect 0552321
 Flat Satin Chrome effect 0552331
 Flat Black 0552341
Bauhaus Firefront (16 inch Fret)
 Pale Gold effect 5135659
 Chrome effect 5135660
 Black 9800123
 Black Nickel 5120251
Description Part Number
Blenheim Firefront (16 inch Fret)
 Pale Gold effect 5135657
 Chrome effect 5135658
 Black Cast Iron with Brass Finials 5135656
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© Baxi Heating U.K. Limited 2009.
INSTALLER GUIDE

3. APPLIANCE DATA AND EFFICIENCY
3.1 General information.
*When converted using kit 0595211
3.2 Efficiency.
There are no specific thermal efficiency requirements appropriate to this type of
appliance as they are intended for decorative purposes only. For the purposes of SAP
the efficiency is classed as 20% for use in the Space Heating Requirements
calculation, see Table 4a of SAP.
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© Baxi Heating U.K. Limited 2009.
Gas Natural (G20) Propane (G31) *
Inlet Pressure 20 mbar 37 mbar
Input - Max. (Gross) 6.85 kW (23,400 Btu/h) 6.7 kW (22,860 Btu/h)
Input - Min. (Gross) 2.3 kW (7,850 Btu/h) 4.0 kW (13,650 Btu/h)
Burner Test Pressure (Cold) 20.0 ± 1.0mbar
(8.0 ± 0.4in w.g.)
37.0 ± 1.0mbar
(14.85 ± 0.4in w.g.)
Gas Connection 8mm pipe 8mm pipe
Burner Injector Cat 82 - 074 Size 132
Pilot & Atmosphere Sensing
Device Copreci Ref. O.D.S
21500/166
Copreci Ref. O.D.S
21500/166 Fitted with RBM
180 -02 injector
Ignition Integral Piezo Spark Integral Piezo Spark
Aeration Factory set Non-adjustable
INSTALLER GUIDE

4. GENERAL INSTALLATION REQUIREMENTS
4.1 Regulations, Standards and Law.
The installation must be in accordance with these instructions.
For the user’s protection, in the United Kingdom it is the law that all gas appliances
are installed by competent persons in accordance with the current edition of the Gas
Safety (Installation and Use) Regulations. Failure to install the appliance correctly
could lead to prosecution. GAS SAFE REGISTER and CORGI require their members
to work to recognised standards. In the United Kingdom the installation must also be
in accordance with:
All the relevant parts of local regulations.
All relevant codes of practice.
The relevant parts of the current editions of the following British Standards:-
BS 1251 - Fireplace components
BS 5440 Part 1 - Installation of flues.
BS 5440 Part 2 - Installation and maintenance of flues and ventilation for gas
appliances of rated input not exceeding 70 kW net (1st, 2nd
and 3rd family gases).
BS 5871 Part 2 - Installation - Inset LFE gas fires
BS 6461 Part 1 - Masonry chimney & flues - Installation
BS 6891 - Gas pipework installation
In England and Wales, the current edition of the Building Regulations issued by the
Department of the Environment and the Welsh Office.
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 editions of:-
IS 813 “Domestic Gas Installations”
ICP3
IS327
All relevant national and local rules in force.
Where no specific instructions are given, reference should be made to the relevant
British Standard Code of Practice.
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© Baxi Heating U.K. Limited 2009.
INSTALLER GUIDE

Page 11
© Baxi Heating U.K. Limited 2009.
Figure 1. Hearth and fireplace opening
Figure 2. Hearth and fireplace opening for installations using the
SPANISH BASKET CASTING ONLY (See section 4.8)
INSTALLER GUIDE

4.2 Ventilation requirements.
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 reference should be made to the current edition of IS 813 “Domestic Gas
Installations” which makes clear the conditions that must be met to demonstrate that
sufficient ventilation is available.
4.3 The Atmosphere sensing device (ASD).
The appliance is fitted with an A.S.D (Atmosphere sensing device). If the appliance
closes down after a period of operation for no apparent reason, the consumer should
be informed to stop using the appliance until the installation and appliance have been
thoroughly checked. The A.S.D will shut the appliance down if an unacceptable
amount of harmful products of combustion accumulate. Under no circumstances
should the A.S.D be altered or bypassed in any way. Only a genuine manufacturers
replacement part should be fitted. The individual A.S.D components are not
replaceable.
4.4 Fireguard requirements.
A fireguard complying with BS 8423 should be fitted for the protection of young
children, the elderly, or the infirm.
4.5 Room considerations.
4.5.1 This appliance must not be installed in any room that contains a bath or shower
or where steam is regularly present.
4.5.2 An extractor fan may only be used in the same room as this appliance, or in
any area from which ventilation for the appliance is taken, if it does not affect the safe
performance 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.
4.5.3 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.
4.6 Chimney preparation.
4.6.1 If the appliance is intended to be installed to a chimney that was previously
used for solid fuel, the flue must be swept clean prior to installation.
All flues should be inspected for soundness and freedom from blockages.
4.6.2 Any chimney damper or restrictor should be removed. If removal is not
possible, they must be secured in the open position.
4.6.3 The flue must not be used for any other appliance or application.
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© Baxi Heating U.K. Limited 2009.
INSTALLER GUIDE

4.7 Fireplace preparation.
4.7.1 If the fireplace opening is an
underfloor draught type, it must be
sealed to stop any draughts.
4.7.2 The surface of the hearth must be
sufficiently flat to enable the bottom of
the front surround and the bottom front
cover to be aligned horizontally. Any
excessive unevenness (uneven tiles,
Cotswold stone, etc.) should be rectified.
4.7.3 If the appliance is to be fitted
against a wall with combustible cladding,
the cladding must be removed from the
area shown in figure 3.
4.7.4 If the fireplace opening is greater
than the acceptable dimensions given in this guide, do not use the back of a fire
surround or marble to reduce the opening. This may cause cracking of the surround
back or marble.
4.7.5 The appliance must not stand on combustible materials or carpets.
4.8 The hearth.
The appliance must be mounted behind a non-combustible hearth unless the
conditions of section 4.10.1 are met (N.B. conglomerate marble hearths are
considered as non-combustible). The appliance can be fitted to a minimum class “O”
100°C surround. The hearth material 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 (See figure 1 or 2).
Page 13
© Baxi Heating U.K. Limited 2009.
Figure 3. Removal of combustible cladding
INSTALLER GUIDE

4.9 Fireplace clearances.
4.9.1 Combustible side projections up to 75mm forward of the fixing plane of the fire
are to be a minimum of 125mm from the fireplace opening (See figure 4).
4.9.2 Combustible side projections greater than 75mm forward of the fixing plane of
the fire are to be a minimum of 178mm from the fireplace opening (See figure 4).
4.9.3 Non-combustible side projections to be 75mm from the fireplace opening (See
figure 4).
4.9.4 The minimum height from the base of the fireplace opening to the underside of
any shelf made from wood or other combustible materials is as follows: -
For a shelf up to 150mm deep
Minimum height = 860mm.
For a shelf deeper than 150mm
860mm + 12.5mm for every 25mm depth over 150mm
(See figure 5).
Page 14
© Baxi Heating U.K. Limited 2009.
Firefront Dimension 'X' (mm) Dimension 'Y' (mm)
Azure 400 65
Quattro / Anthem 390 65
Majestic 400 50
Portland 390 60
Figure 4. Appliance dimensions (Firefront may differ from that shown)
INSTALLER GUIDE
See figure 5

4.10 Installation options.
In the United Kingdom, as supplied the appliance can be installed in the following
situations: -
4.10.1. 'Hole-in-the-wall' Installations
For installation without the Spanish basket casting.
 It is recommended that a hearth should be installed as in figure 1.
For installation with the Spanish basket casting.
 It is recommended that a hearth should be installed as in figure 2.
For installation with and without the Spanish basket casting.
 If a hearth is not fitted or if a reduced depth hearth is fitted, the fire must be
installed so that the distance from the base of the fireplace opening in the wall to the
finished floor level is at least 75mm. Where there is no floor covering or carpet and
the floor is of a type that is likely to be covered in such a way in the future then the
distance from the base of the fireplace opening in the wall to the finished floor level
should be increased to at least 150mm.
 If the lower part of the fascia (the firefront) is free standing, the recommended
reduced hearth depth is 100mm. This is necessary to support the firefront.
 To protect from the risk of burns and ignition of clothing a tactile separator shall be
used. The hearth detailed in section 4.8 meets the requirements for a tactile
separator. If this is not used then a 680mm long fender, kerb, horizontal bar, or other
barrier, being fixed not less than 50mm above floor level and positioned 300mm in
front of the fixing plane of the fire will meet the requirement.
The tactile separator can also take the form of a canopy, being fixed not more than
1000mm above floor level and positioned 300mm in front of and 150mm beyond the
Page 15
© Baxi Heating U.K. Limited 2009.
Figure 5. Combustible shelf clearances
INSTALLER GUIDE

edge of any naked flame or incandescent part of the fire bed.
For installations without the Spanish basket casting.
 To a fireplace complete with surround and hearth as shown in figure 1 and
complying with BS1251.
For installations with the Spanish basket casting.
 To a fireplace complete with surround and hearth as shown in figure 2 and
complying with BS1251.
For fireplace openings having dimensions different to those shown in figure 2 refer to
figure 6 and BS 5871-Part 3 for flue sizes.
Into a fireplace that has a fireback of nominal size 400mm and conforming to
BS1251.
Into a Replacement Chair Brick as below: -
 Quattro, Anthem, Majestic and models not supplied with a firefront
Into a Replacement Chairbrick. Part number 0552311.
 Azure model
Into a B&Q Replacement Chairbrick. Part number 0552301.
Suitable flues and minimum flue sizes are as follows: -
225mm x 225mm conventional brick flue.
175mm diameter lined brick or stone flue.
200mm diameter factory made insulated flue manufactured to BS4543.
175mm diameter flue pipe. See BS6461 Part 1 for suitable materials.
The minimum effective height of the flue must be 3m.
The flue must not be used for any other appliance or application.
4.11 Propane appliances.
Propane gas appliances must not be installed in a room that is built entirely below
ground level (See BS 5871 Part 3).
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© Baxi Heating U.K. Limited 2009.
INSTALLER GUIDE

Page 17
© Baxi Heating U.K. Limited 2009.
Figure 6. Flue sizing table.
INSTALLER GUIDE

5. UNPACKING
Contents:
1 Burner assembly.
1 Nut & olive for 8mm inlet pipe.
4 Screws.
4 Plastic screw plugs.
1 Fuel bed matrix support plate.
2 Self tapping screws.
1 Inlet ‘T’ connector / elbow.
1 Ceramic fuel effect pack.
1 Burner tray trim (Not fitted to Anthem or Quattro models).
For models supplied with a firefront
1 Firefront and ash pan cover (Where applicable).
Carefully remove the contents. Take special care in handling the ceramic fuel effect
pieces. Check that all the listed parts are present and in good condition.
6. INSTALLATION OF APPLIANCE
INSTALLATION
6.1 Fireplace size.
The fireplace must comply with the requirements described in section 4.
6.2 Fireplace flue pull.
Visually inspect the flue for any obstruction, and that a smooth transition from the
fireplace opening into the flue is available. 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 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.
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© Baxi Heating U.K. Limited 2009.
INSTALLER GUIDE

6.3 Installation of the burner unit
6.3.1 Prior to installation of the burner the
rear ceramic support bracket must be fitted
(See figure 7). Secure with two self-tapping
screws but do not over-tighten as these will
have to be removed again when installing
the burner.
6.3.2 Burner Tray trim.
 The trim is not to be fitted to
Anthem or Quattro models.
 The fire is supplied with a
burner tray trim. Fit the trim as in
figure 8.
6.3.3 Burner Positioning.
 The two tags at the side of the burner can be
folded against the side of the burner tray. This may be
required for installations where the width of the
fireplace opening is restricted or when fitting into a
‘Spanish Basket’ casting (See figure 9).
Page 19
© Baxi Heating U.K. Limited 2009.
Figure 9. Burner tags
Figure 8. Burner tray trim
Figure 7. Fitting the rear support plate
INSTALLER GUIDE

For installations without the 'Spanish Basket' casting.
 Place the burner unit centrally within
the fireplace opening. Position the burner
to the rear of the opening, this may be
moved forward providing the front of the
burner tray trim does not protrude beyond
the front plane of the fireplace opening by
more than 33mm (See figure 10).
For installations with the 'Spanish
Basket' casting.
 Place the casting centrally within the
fireplace opening. Position the casting to
the rear of the opening.
 Place the burner unit inside the casting.
 It is important that the burner tray trim
touches the inner front face of the casting.
This will give the customer greater access
to the control knob.
 The casting and burner may be
moved forward providing the front of
the burner tray trim does not
protrude beyond the front plane of
the fireplace opening by more than
33mm (See figure 10).
6.3.4 Locating the burner.
 Mark onto the floor, the position
of the two fixing holes in the front
fixing bracket (See figure 11).
 Without disturbing the burner,
remove the two screws at the rear of
the burner tray (See figure 12).
These secure the rear ceramic support
bracket to the burner tray.
 Hold the ceramic support bracket in
place. Lift and remove the burner.
 The base of the rear ceramic support
bracket has two holes. Mark their positions
onto the floor.
 Drill all four marked hole positions with
a 6mm masonry drill bit.
 Insert a wooden plug into each hole.
 Unscrew the fixing bracket from the
Page 20
© Baxi Heating U.K. Limited 2009.
Figure 12. Screw removal
Figure 11. Locating the burner
Figure 10. Burner positioning
INSTALLER GUIDE