Wonderfire airflame excel mk.3 ac 18xl Instructions for use

5129826/03
AIRFLAME
© Baxi Heating U.K. Limited 2008.
MODEL PRODUCT CODE
AF 16 NV 9500298 (coal)
0505411 (log)
AC 16 NV
9500296 (coal)
0505511 (log)
0503611 (pebble)
AF 18 XL 9500360 (coal)
AC 18 XL 9500361 (coal)
MODEL PRODUCT CODE
AF 16 NV RC 0505601 (coal)
0505611 (log)
AC 16 NV RC 0505701 (coal)
0505711 (log)
AF 18 XL RC 0505301 (coal)
AC 18 XL RC 0505901 (coal)
MODEL PRODUCT CODE
AC 16 NV TC 05036T1 (coal)
0505811 (log)
MODEL PRODUCT CODE
AF 16 NV 5” Leg 9505298 (coal)
We trust that this guide gives
sufficient details to enable this
appliance to be installed, operated
and maintained satisfactorily.
However, if further information is
required, our
Wonderfire Technical Helpline will
be pleased to help.
Telephone [phone]. (National
call rates apply in the United
Kingdom).
In the Republic of Ireland
Telephone [phone].
INSTALLER: Please leave this guide with the owner
INSTALLER AND OWNER GUIDE

© Baxi Heating U.K. Limited 2008.
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.
Wonderfire, Wood Lane, Erdington, Birmingham B24 9QP
www.wonderfire.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 2008.
THIS APPLIANCE IS FOR USE WITH NATURAL GAS (G20).
WHEN CONVERTED USING CONVERSION KITS AS SHOWN IN SECTION 2 OF
THE INSTALLER GUIDE THE SPECIFIED APPLIANCES ARE FOR USE WITH
PROPANE GAS (G31).
THIS APPLIANCE IS SUITABLE ONLY FOR INSTALLATION IN THE UNITED
KINGDOM (GB) AND THE REPUBLIC OF IRELAND (IE).
INSTALLER GUIDE

Safety First.
Wonderfire fires are CE Approved and designed to meet the appropriate British
Standards.
The Highest Standards
Wonderfire is a member of SBGI and HHIC (Heating and Hot water Industry Council)
which works to ensure high standards of safety, quality and performance.
Careful Installation
Wonderfire is a CORGI registered company. All our gas fires must be
installed by a competent CORGI Registered Installer in accordance
with our Installer Guide.
Page 3
© Baxi Heating U.K. Limited 2008.
INSTALLER GUIDE

Page 4
© Baxi Heating U.K. Limited 2008.
INSTALLER GUIDE
FOR OWNER GUIDE SEE PAGES 38 TO 55
INSTALLER GUIDE

CONTENTS
Section Page
INSTALLER GUIDE 4 - 37
OWNER GUIDE 38 - 55
1. SAFETY 6
2. LPG CONVERSION 6
3. APPLIANCE DATA 7
4. GENERAL INSTALLATION REQUIREMENTS 9
5. UNPACKING THE APPLIANCE 15
6. INSTALLATION OF STANDARD AND LARGE CONVECTION BOXES. 16
7. BURNER AND SUPPLY PIPE INSTALLATION 23
8. FITTING THE CERAMIC FUEL EFFECT 24
9. FULL OPERATIONAL CHECKS 24
9.1 General information. 24
9.2 Checking the operation of the MANUAL CONTROL burner. 24
9.3 Checking the operation of the REMOTE CONTROL (RC)burner. 25
9.4 Adjusting the remote control handset / receiver code. 27
9.5 Checking the operation of the TOP CONTROL (TC) burner. 27
9.6 Inlet pressure check. 29
9.7. Aeration setting for fires fitted with aeration control. 30
10. SPILLAGE AND FLAME SUPERVISION CHECKS 30
11. DECORATIVE FIREFRONTS 33
12. FINAL REVIEW 34
13. SERVICING & PARTS REPLACEMENT 35
13.1 Annual maintenance. 35
13.2 To remove the injector. 36
13.3 To remove the thermocouple & pilot unit. 36
13.4 To remove the gas valve unit. 36
13.5 To remove the convection box from the fireplace
(For models fitted into a convection box). 37
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© Baxi Heating U.K. Limited 2008.
INSTALLER GUIDE

1. SAFETY
Installer: Before continuing any further with the installation of this appliance please
read the following guide to manual handling.
The approximate lifting weight of this appliance is as below:
Model Heat Engine (kg) Convection box (kg)
AF 16 NV 1.8 Not supplied
AC 16 NV 1.8 9.45
AF 18 XL 2.0 Not supplied
AC 18 XL 2.0 18.7
AF 16 NV RC 3.4 Not supplied
AC 16 NV RC 3.4 9.45
AF 18 XL RC 2.0 Not supplied
AC 18 XL RC 2.0 18.7
AF 16 NV 5” Leg 2.0 Not supplied
AC 16 NV TC 3.0 11.33
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.
2. LPG CONVERSION
The following conversion kits are available to convert from natural gas (G20) to
propane gas (G31).
* Important: The AC16NV Model supplied / fitted with a ceramic PEBBLE fuel
effect shall not be converted to LPG.
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© Baxi Heating U.K. Limited 2008.
INSTALLER GUIDE
MODEL CONVERSION KIT PART NUMBER
AF16NVP / AC16NVP* / AC16NVPTC 9500365
AF16NVP RC / AC16NVP RC 9500376
AF18XLP / AC18XLP 9500362
AF18XLP RC / AC18XLP RC 9500377

3. APPLIANCE DATA
The efficiency of this appliance has been measured as specified in BS 7977 - 1 and
the result is as below:
Model Efficiency %(Gross) Model Efficiency %(Gross)
AC 16 NV RC 53 AC 16 NV 53
AC 18 XL RC 55 AC 18 XL 55
AC 16 NV TC 53
AF models are not included above as they have a default value included in the SAP
calculation.
The gross calorific value of the fuel has been used for this efficiency calculation. The
test data from which it has been calculated has been certified by Advantica
Certification services (0087). The efficiency value may be used in the UK
Government's Standard Assessment Procedure (SAP) for energy rating of dwellings.
The conversion of net efficiency to gross was achieved by multiplying the net
efficiency by the following conversion factor from Table E3 of SAP 2005, rounding
down to the nearest whole number.
This product uses fuel effect pieces and burner (AC models also include a
burner compartment rear wall) 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 2008.
INSTALLER GUIDE
Gas Conversion factor from net to gross efficiency
Natural Gas 0.901
LPG 0.921

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© Baxi Heating U.K. Limited 2008.
INSTALLER GUIDE
MODEL
GROSS HEAT
INPUT (kW) INLET PRESSURE
(TO BE TAKEN ON MAX. SETTING
WITH THE FIRE COLD).
INJECTOR
SIZE
MIN.MAX.
AF16NV (Coal or Log)
AC16NV (Coal or Log)
AC16NV TC (Coal or Log)
AF16NV 5” LEG (Coal)
4.8 6.95 20.0mbar ± 1.0mbar
(8.0 ± 0.4in w.g.) 82 - 442
AF16NV RC (Coal or Log)
AC16NV RC (Coal or Log) 3.2 6.95 20.0mbar ± 1.0mbar (8.0 ± 0.4in w.g.) 82 - 442
AC16NV (Pebble) 4.8 6.3 20.0mbar ± 1.0mbar
(8.0 ± 0.4in w.g.) 82 - 069
AF16NVP AC16NVP 5.8 6.2 37.0 ± 1.0 mbar
(14.85 ± 0.4in w.g.) 92 - 200
AF16NVP RC
AC16NVP RC 4.3 6.2 37.0 ± 1.0 mbar (14.85 ± 0.4in w.g.) 92 - 200
AF18XL AC18XL 5.8 10.5 20.0mbar ± 1.0mbar
(8.0 ± 0.4in w.g.) 82 - 722
AF18XL RC AC18XL RC 5.8 10.5 20.0mbar ± 1.0mbar
(8.0 ± 0.4in w.g.) 82 - 722
AF18XLP AC18XLP 7.6 9.0 37.0 ± 1.0 mbar
(14.85 ± 0.4in w.g.) 92 - 260
AF18XLP RC AC18XLP RC 7.6 9.0 37.0 ± 1.0 mbar
(14.85 ± 0.4in w.g.) 92 - 260

4. GENERAL INSTALLATION REQUIREMENTS
4.1 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. CORGI requires its 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 EN 1856 Part 1
BS 5440 Part 1
BS 5440 Part 2
BS 5871 Part 2
BS 5871 Part 3
BS 6461 Part 1
BS 6891 (Masonry chimney & flues - Installation)
BS 8303
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
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© Baxi Heating U.K. Limited 2008.
MODEL
BURNER TRAY DIMENSIONS
WIDTH DEPTH
HEIGHT
(INCLUDING
FUEL
EFFECT)
AF16NV AC16NV
AF16NV RC AC16NV RC AF16NV TC 380mm (15”)
at front tapering
to 280mm (11”) at
the rear
225mm
(9”) 305mm (12”)
AF16NVP AC16NVP
AF16NVP RC AC16NVP RC
AF16NV 5” LEG As Above As
Above
345mm
(13½”)
AF18XL AC18XL
AF18XL RC AC18XL RC 430mm (17”) at
the front tapering
to 300mm (11¾”)
at the rear
225mm
(9”) 305mm (12”)
AF18XLP AC18XLP
AF18XLP RC AC18XLP RC
INSTALLER GUIDE

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 also conform with 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.
4.2 Improper installation of this gas fire could be hazardous to health. This gas fire is
to be used only in a properly flued, incombustible, masonry fireplace with the chimney
or flue free from obstruction.
4.3 As supplied the appliance can be installed in the following situations: -
To a fireplace complete with a hearth complying with BS1251. The required hearth
and clearance dimensions are shown in figure 1. (Remove any existing heating
appliance - when using a convection box it may be necessary to remove the firebrick
back). When installing using a convection box see section 6.
Suitable flues and minimum flue sizes are as follows: -
a) 225mm x 225mm conventional brick flue.
b) 175mm diameter lined brick or stone flue.
c) 200mm diameter factory made insulated flue manufactured to BS EN 1856 Part 1
d) 175mm diameter flue pipe. See BS6461 Part 1 for suitable materials.
Additional flue information for NV models fitted to convection boxes.
In addition to the flues specified in section 4.3 NV MODELS can be used on the
following flue:
A correctly installed metal flue with a minimum diameter of 125mm (5”) is acceptable
for NV models only, providing both inner and outer convection box restrictor plates
are removed (See section 6.6 - point 3).
Larger fireplace openings may require a correspondingly larger chimney diameter, a
faulty flue or chimney may result in products of combustion spilling into the room with
consequent possible damage to furniture and decor. Conduct a smoke test before
proceeding with installation. Refer to the section 6.4.5 “Fireplace flue pull”.
The minimum effective height of the flue must be 3m.
The flue must not be used for any other appliance or application.
Any chimney damper or restrictor should be removed. If removal is not possible, they
must be secured in the open position.
If the appliance is intended to be installed to a chimney that was previously used for
Page 10
© Baxi Heating U.K. Limited 2008.
INSTALLER GUIDE

solid fuel, the flue must be swept clean prior to installation.
All flues should be inspected for soundness and freedom from blockages.
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© Baxi Heating U.K. Limited 2008.
INSTALLER GUIDE
Figure 1. Hearth sizes.

4.3.1. ‘Hole-in-the-wall’ / elevated installations -
It is recommended that a hearth should be installed as in section 4.5.
For models fitted with the Essence fascia - The fascia has been specifically
designed for ‘hole in the wall’ installations. It is recommended that a hearth should
be installed as in figure 1. If a hearth is not 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 115mm (This will give a distance under the fascia of 56mm to the
finished floor level). 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 then the distance from the base of
the fireplace opening in the wall to the finished floor level should be increased to at
least 190mm.
For models NOT fitted with 5” legs (excluding the Essence model) - 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 115mm
minimum. 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 floor level should be increased to at least
190mm.
It is recommended that the reduced hearth has a depth from the fixing plane of
the fire of 100mm minimum. This is necessary to support the lower front casting /
firefront.
For models fitted with 5” legs - 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 75mm minimum. 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 floor level
should be increased to at least 150mm.
It is recommended that the reduced hearth has a depth from the fixing plane of
the fire of 100mm minimum. This is necessary to support the lower front casting /
firefront.
All models
To protect from the risk of burns and ignition of clothing a tactile separator shall
be used. The hearth detailed in section 4.5 meets the requirements for a tactile
separator.
For 16” fires - If this is not used then a 700mm 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.
For 18” fires - If this is not used then a 760mm 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.
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© Baxi Heating U.K. Limited 2008.
INSTALLER GUIDE

4.4 If the fireplace opening is an underfloor draught type, it must be sealed to stop
any draughts.
4.5 The appliance must be mounted behind a non-combustible hearth unless the
conditions of section 4.3.1 are met (N.B. conglomerate marble hearths are considered
as non-combustible). The appliance can be fitted to a minimum class “O” – 150°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). On none elevated installations 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. Any excessive unevenness (uneven tiles,
Cotswold stone, etc.) should be rectified. The base of the fireplace opening must be
level with the top surface of the hearth. There should be no gaps between the hearth
and the fireplace opening.
4.6 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 = 818mm.
•For a shelf deeper than 150mm
818mm + 12.5mm for every 25mm depth over 150mm
(See Graph 1).
4.7 If the fireplace opening is greater than the opening in the intended surround
back, 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.
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© Baxi Heating U.K. Limited 2008.
INSTALLER GUIDE
Graph 1. Combustible shelf clearances

4.8 The appliance must not stand on combustible materials or carpets.
4.9 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.
4.10 Ventilation.
IE only: This appliance must be installed in accordance with 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.
GB only: See the table below for purpose made ventilation requirements. In GB
reference should be made to BS 5871 Part 2.
* When converted to propane using the kits from section 2 of this guide.
**AF16NV / AF16NVP - see below.
GB only: Normal adventitious ventilation is usually sufficient to satisfy the ventilation
requirements of this appliance, however on larger fireplace openings with a height
greater than 24” and a width greater than 18” we do recommend that a purpose made
ventilation grille with a minimum opening size of 100cm² is fitted. In all cases a
clearance of products (spillage test) must be carried out.
IE only: This appliance must be installed in accordance with 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. In all cases a clearance of
products (spillage test) must be carried out.
4.11 This appliance must not be installed in any room that contains a bath or shower
or where steam is regularly present.
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© Baxi Heating U.K. Limited 2008.
INSTALLER GUIDE
MODEL HEAT INPUT
( kw GROSS)
PURPOSE MADE
VENTILATION SIZE (cm²)
AF16NV / AF16NV RC /
AF16NV 5” LEG 6.95 (Coal or Log) NONE**
AC16NV / AC16NV RC
AC16NV TC
6.95 (Coal or Log) /
6.3 (Pebble on
AC16NV only)
NONE**
AF18XL / AF18XL RC 10.5 100
AC18XL / AC18XL RC 10.5 15.75
AF16NVP* / AF16NVP RC* 6.2 NONE**
AC16NVP* / AC16NVP RC* 6.2 NONE**
AF18XLP* / AF18XLP RC* 10.5 100
AC18XLP* / AC18XLP RC* 9.0 11.25

4.12 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.
4.13 A fireguard complying with BS 8423 should be fitted for the protection of young
children, the elderly, the infirm or pet animals.
4.14 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
manufacturer’s replacement part should be fitted. The individual A.S.D components
are not replaceable.
4.15 Propane gas appliances must not be installed in a room that is built entirely
below ground level (See BS 5871 Part 3).
Important: The AC16NV Model supplied / fitted with a ceramic PEBBLE fuel
effect shall not be converted to LPG.
5. UNPACKING THE APPLIANCE
Carefully remove the contents. Check that all the listed parts are present and in good
condition.
Contents:
1 Burner assembly.
1 Ceramic fuel effect.
1 Guarantee card.
1 Smoke match tube.
AF MODELS ONLY
1 Loose parts pack (1 x fixing screw and fibre wall plug).
AC MODELS ONLY
1 Loose parts pack (2 tension wires, 2 cable retainer assemblies and foam seal).
1 Convection box.
REMOTE CONTROL (RC) MODELS ONLY
1 Remote control handset.
1 PP3 battery.
4 AA batteries.
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© Baxi Heating U.K. Limited 2008.
INSTALLER GUIDE
(TC) MODELS ONLY
4 AA batteries.
1 Convection box.

6. INSTALLATION OF STANDARD AND
LARGE CONVECTION BOXES.
6.1 General information.
The Standard Wonderfire Convection box is designed to fit into fireplace openings
between 16" and 18" and constructed in accordance with the requirements of
BS1251. Any chairbrick / fireback will require removal.
The large Wonderfire Convection box is designed to fit into fireplace openings
between 19" and 22" and constructed in accordance with the requirements of
BS1251. Any chairbrick / fireback will require removal.
There are three grommets supplied with the convection box. The large grommet is to
be fitted to the rear hole in the convection box. The two smaller grommets are to be
fitted into the holes in the sides of the convection box. The grommets must be fitted
before continuing with the installation. On (TC) models the grommet on the right hand
side will have to be cut to accommodate the wiring harness.
The installation of any fire other than the listed Wonderfire products will invalidate the
approval status and guarantee.
This fireplace insert / Convection box is unsuitable for use with solid fuel.
Note: This appliance is fitted with a restrictor plate. If, after conducting a spillage test
(See section 10.1) smoke is not positively drawn into the chimney, this plate must be
removed and the spillage test repeated. Also, see section 6.2 below.
If there is a possibility of birds nesting in the area an approved cowl suitable for solid
fuel should be fitted.
6.2 Additional flue information for NV models fitted to convection boxes.
In addition to the flues specified in section 4.3 NV MODELS can be used on the
following flue:
A correctly installed metal flue with a minimum diameter of 125mm (5”) is acceptable
for NV models only, providing both inner and outer convection box restrictor plates
are removed (See section 6.6 - point 3).
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INSTALLER GUIDE

6.3 Convection box sizes.
The convection box sizes are shown in figure 2.
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© Baxi Heating U.K. Limited 2008.
KEY STANDARD LARGE
A 530mm 590mm
B 605mm 605mm
C 410mm 470mm
D 545mm 545mm
E 405mm 475mm
F 350mm 415mm
G 255mm 225mm
H 550mm 550mm
J 395mm 395mm
K 295mm 295mm
L 10mm 10mm
L (TC) models 35mm N/A
Figure 2. Convection box dimensions (The convection box may differ in design
from that shown)
INSTALLER GUIDE

6.4 Fireplace requirements.
6.4.1 Fireplace opening and hearth dimensions.
The fireplace opening should be as shown in figure 3.
6.4.2 Fireplace size.
The fireplace must comply with the requirements described in section 4.3. This will
probably entail removing the fireback and infill material behind the fireback. The area
shown in figure 4 must be kept clear of obstructions.
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INSTALLER GUIDE
16 inch convector
box Minimum opening
sizes
W= 415mm
(16½ inch)
H= 560mm
(22¼ inch)
D= 305mm
(12 inch)
16 inch convector
box with (TC)
W= 415mm
(16½ inch)
H= 560mm
(22¼ inch)
D= 280mm
(11 inch)
16 inch convector
box & (TC)
Maximum
opening sizes
W= 495mm
(19½ inch)
H= 585mm
(23 inch) D= NONE
18 inch convector
box
Minimum opening
sizes
W= 480mm
(19 inch)
H= 560mm
(22¼ inch)
D= 305mm
(12 inch)
18 inch convector
box
Maximum
opening sizes
W= 560mm
(22 inch)
H= 585mm
(23 inch) D= NONE
Figure 3. Hearth and fireplace openings

6.4.3 Fireplace general condition.
The fireplace floor
should be reasonably
flat to ensure that the
convection box 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
convection box top and
side flange seals to
ensure good sealing.
These faces should be
made 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 convection box fascia. The cladding must also not touch the
fascia. 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.
6.4.4 Soundness for appliance attachment.
The appliance must be secured in place using concealed tension cables fixed to the
rear of the fireplace opening (See section 6.7). Make sure that the relevant areas at
the fireplace back are sound enough to take the eyebolts. If these areas have
deteriorated due to prolonged use they should be made sound with suitable cement.
6.4.5 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 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 2008.
Figure 4. Fireplace debris catchment area.
INSTALLER GUIDE

6.5 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 includes a valve for isolating the
gas supply and a pressure test point.
The supply pipe must be rigid material. Flexible pipe must not be used.
This appliance is designed for a concealed supply pipe connection routed through the
opening at the back or sides of the convection box. Before the appliance is fitted into
the fireplace it will be necessary to extend the supply line so that it will project through
the grommet in the back / sides of the convection box and run to the 'T' connector at
the front. The pipe run from the supply line up to the rear / side opening in the
convection box must be kept away from the area which will be taken by the
convection box when it is installed (See figure 4).
The inlet 'T' connector should be fitted to the supply pipe at this stage. The access
opening at the rear of the convection box is sized to accept the "T" connector.
6.6 Preparing for installation.
1. Detach the burner from the convection box by removing one nut. Lift the burner
unit clear.
2. Pierce the appropriate grommet at the back / side of the convection box to allow
the supply 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 grommets unless the supply pipe is
to pass through them.
3. Only for installations having a metal flue
of 125mm (See section 6.2)
Detach the outer restrictor plate by removing
four screws (See figure 5).
Detach the inner restrictor plate by removing
one screw (See figure 5).
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© Baxi Heating U.K. Limited 2008.
INSTALLER GUIDE
Figure 5. Restrictor plates