Baxi Duo-tec Combi 24 HE A, Duo-tec Combi 28 HE A, Duo-tec Combi 33 HE A, Duo-tec Combi 40 HE A User's Operating Instructions & Important Warranty Information
© Baxi Heating UK Ltd 2008
Duo-tec Combi HE A Range
Gas Fired Wall Mounted Condensing
Combination Boiler
Please keep these instructions in a safe place.
If you move house, please hand them over to the next occupier.
Baxi Duo-tec Combi 28HE achieved the top score
of 34 boilers tested in a recent Which? report.
User’s Operating Instructions &
Important Warranty Information
2
© Baxi Heating UK Ltd 2008
© Baxi Heating UK Ltd 2008 All rights reserved. No part of this publication may
be reproduced or transmitted in any form or by any means, or stored in any
retrieval system of any nature (including in any database), in each case whether
electronic, mechanical, recording or otherwise, without the prior written
permission of the copyright owner, except for permitted fair dealing under
Copyrights, Designs and Patents Act 1988.
Applications for the copyright owner’s permission to reproduce or make other
use of any part of this publication should be made, giving details of the proposed
use, to the following address:
The Company Secretary, Baxi Heating UK Ltd, The Wyvern Business Park,
Stanier Way, Derby, DE21 6BF.
Full acknowledgement of author and source must be given.
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.
1.0 Quick Reference Guide 3
2.0 Troubleshooting 4
3.0 Repressurising System 6
4.0 Clearances 7
5.0 Care of the Boiler 8
6.0 Legislation 9
7.0 Notes 10
8.0 Emergency 11
9.0 Warranty & Service 12
Section Page
Contents
Boiler Controls - see opposite page
for Operating Quick Reference Guide
Natural Gas
Baxi Duo-tec Combi 24 HE A
G.C.No47 075 35
Baxi Duo-tec Combi 28 HE A
G.C.No47 075 36
Baxi Duo-tec Combi 33 HE A
G.C.No47 075 37
Baxi Duo-tec Combi 40 HE A
G.C.No47 075 38
Baxi Heating UK Ltd is a
BS-EN ISO 9001 Accredited Company
The code of practice for the installation,
commissioning & servicing of central
heating systems.
“Baxi” supports
This product has an energy rating (A) on a scale of A to G.
For more information see www.boilers.org.uk. This is a certification mark.
1.0 Quick Reference Guide
3
© Baxi Heating UK Ltd 2008
bar
0
1
2
3
4
bar
0
1
2
3
4
ON/OFF/Reset
Selector Switch
Display Central Heating
Temperature Control
Domestic Hot Water
Temperature Control
System Pressure Gauge
OFF Position
The boiler will not operate.
Central Heating Temperature Control
Turn the knob clockwise to increase or anticlockwise to decrease the temperature.
Range 25 - 80° C.
Domestic Hot Water Temperature Control
Turn the knob clockwise to increase or anticlockwise to decrease the temperature.
Central Heating Indicator - The indicator will illuminate when the boiler is in the central
heating mode.
Domestic Hot Water Indicator - The indicator will illuminate when hot water is being
supplied to a tap or shower.
Burner On Indicator - The indicator will illuminate when the burner has fired and is heating
your central heating or domestic hot water.
Boiler Output Temperature - In either the central heating or domestic hot water position
the display will illuminate showing the current boiler temperature in degrees centigrade.
Central Heating System Pressure - The normal operating water pressure is between 1 and
2.0 bar. If the pressure exceeds 3 bar the safety pressure valve will operate and a fault is
indicated. Contact your Installer.
Central Heating & Hot Water
Both Heating & Hot Water will operate.
Reset
Hold for approx 5 seconds and release.
Display
Position of
Optional Timer
2.0 Troubleshooting
4
© Baxi Heating UK Ltd 2008
START
Make sure the gas supply is
turned ON and check if other
gas appliances are operating
(e.g. fire, cooker).
If no gas, consult your
supplier.
Is the ON/OFF/Reset
Select Switch in the
( ) position ?
Is the ( ) or ( ) light on
and the ( ) on ?
Check electricity to the
boiler is switched on.
Is the display lit ?
Display
Central Heating
Indicator
Domestic Hot
Water Indicator
Burner On
Indicator
Boiler operating satisfactorily.
bar
0
1
2
3
4
Is the Central Heating System
Pressure between 1 and 2.5
bar ?
If the reading falls below 1 bar
repressurise the system as
described in section 3.1.
Does the display show an error
code e.g. E133, E110 ?
Boiler not working
NO
NO
YES YES
YES
NO
Turn the ON/OFF/Reset
Selector Switch to Reset.
Error Code E119 showing low
pressure.
NO
YES
YES
NO
If boiler does not
Reset
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