Baxi Megatlo Installation guide

© Baxi Heating UK Ltd 2007
Baxi System HE Range
Gas Fired Wall Mounted Condensing Boiler
User’s Operating Instructions &
Important Warranty Information
Please keep these instructions in a safe place.
If you move house, please hand them over to the next occupier.

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2© Baxi Heating UK Ltd 2007
Natural Gas
Baxi Megaflo System 15 HE
G.C.No41 075 52
Baxi Megaflo System 18 HE
G.C.No41 075 53
Baxi Megaflo System 24 HE
G.C.No41 075 47
Baxi Megaflo System 28 HE
G.C.No41 075 48
Baxi Megaflo System 32 HE
G.C.No41 075 54
© Baxi Heating UK Ltd 2007 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, Pentagon House,
Sir Frank Whittle Road, Derby, DE21 4XA.
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.
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
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
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.
Boiler Controls - see opposite page
for Operating Quick Reference Guide

1.0 Quick Reference Guide
3
© Baxi Heating UK Ltd 2007
bar
0
1
2
3
4
bar
0
1
2
3
4
ON/OFF/Reset
Selector Switch
Display Central Heating
Temperature Control
Calibration 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.
Central Heating & Hot Water Indicator - The indicator will illuminate when the boiler is in
the central heating/hot water mode.
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
Calibration Control
This control is for use only by the installer or service engineer.

2.0 Troubleshooting
4© Baxi Heating UK Ltd 2007
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 ( ) light on and the
( ) on ?
Check electricity to the
boiler is switched on.
Is the display lit ?
Display
Central Heating
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

2.0 Troubleshooting
5
© Baxi Heating UK Ltd 2007
Is the Timer ON and calling for
heat ?
Ensure timer is set for Central
Heating ON (see any
instructions supplied with
timer).
Is the Room Thermostat (if
fitted) set high enough ?
15
10
5
20
25
15
10
5
20
25
Turn Room Thermostat to
maximum setting (typical
example shown).
If you don’t know what you need to do to
get the boiler to light, or need help with
the system and controls, contact your
installer as soon as possible.
YES
NO
CONTACT YOUR
INSTALLER OR
SERVICE ENGINEER.
YES
12
1
2
3
4
5
6
7
8
9
10
11
CH ON CH OFF
Typical
examples of
external timer
NO

3.0 Repressurising System
6© Baxi Heating UK Ltd 2007
3.1 Central Heating System Pressure
1. The normal operating water pressure is between 1
and 2.5 bar (Fig. 1). If the pressure exceeds 3 bar the
safety pressure valve will operate and a fault is indicated.
Contact your installer.
2. It may be necessary to repressurise the system
occasionally (Fig. 2). A filling device (the filling loop) will
be fitted on the system.
3. If you are unsure of its position, or cannot identify it,
consult the installer who fitted the boiler.
4. The filling loop consists of two taps and a separate
metal braided hose with connection fittings.
5. Only when repressurising should the hose be
connected between the two taps. Ensure that the nuts
on the pipe ends are tightened onto the taps.
6. Fully open one of the taps first, and then while
watching the pressure gauge, carefully open the second
tap.
7. When the needle on the gauge is indicating 1 or more
turn both taps off.
8. Disconnect the metal braided hose from the taps (a
small amount of water may be present) and remove it.
Keep the hose in a safe place for future use.
bar
0
1
2
3
4
bar
0
1
2
3
4
Fig. 1
Fig. 2
Normal Pressure
Requires
Repressurising
bar
0
1
2
3
4
Fault
Fig. 3

4.0 Clearances
7
© Baxi Heating UK Ltd 2007
Fig. 4
Fig. 5
200mm Min
780mm
450mm
200mm Min
(300mm Min if
using 80/125mm
flueing system)
5mm Min
5mm Min
450mm Min
For Servicing
Purposes
In Operation
5mm Min 4.1 For your Safety
1. This appliance must have been installed in accordance
with the manufacturer’s instructions and the regulations
in force.
2. Any modification that may interfere with the normal
operation of the appliance without express written
permission from the manufacturer or his agent could
invalidate the appliance warranty. In GB this could also
infringe the Gas Safety (Installation and Use) Regulations.
3. Your boiler must not be operated without the casing
correctly fitted.
4. Do not interfere with any sealed components on this
boiler.
5. Take note of any warning labels on your boiler.
6. Your boiler should have the following minimum
clearances for Safety and Maintenance
(Figs. 4 & 5):-
Top - 200mm
Bottom - 200mm
Left side - 5mm
Right Side - 5mm
Front - 5mm (In Operation)
- 450mm (For Servicing)
7. If your boiler is installed in a compartment, do not use
it for storage purposes. Do not obstruct any purpose
provided ventilation openings.
8. Flammable materials must not be stored in close
proximity to your boiler.
9. Avoid skin contact when your boiler is in operation, as
some surfaces may get hot e.g. pipework.
10. Ensure that the flue terminal, outside the house,
does not become damaged or obstructed, particularly
by foliage.
11. It is important that the condensate drain system is
not blocked, modified or damaged in any way as this
would affect the operation of your boiler. Your installer
should have insulated any exposed pipework.
GB - Heating Industry definition meaning England, Scotland,
Wales, Northern Ireland, Isle of Man and the Channel Isles

5.0 Care of the Boiler
8© Baxi Heating UK Ltd 2007
5.1 Cleaning the Outer case
The painted panels should be wiped with a damp cloth and
then dried completely. DO NOT USE ABRASIVE
CLEANING AGENTS.
5.2 Protection & Precaution
1. The boiler incorporates an integral frost protection feature
that will operate when the selector switch is in ( )
position. If the boiler temperature falls below 5° C, then the
boiler will operate until the water temperature has been
raised.
2. If a system frost thermostat has been fitted (your installer
will be able to advise you), then to operate correctly and
protect your system, the gas and electricity must be left on and
the appliance set in the central heating mode.
3. The boiler incorporates an integral pump protection feature
which continually monitors the time since the pump last
operated. To prevent seizure, the pump will operate for
approximately 1 minute if it has not run in the last 24 hours.
5.3 Fault Indication
1. If a fault occurs on the boiler an error code may be shown
on the facia display.
2. The codes are either two or three digit, preceded by the
letter 'E'. For example, code E133 will be displayed by 'E1'
alternating with '33'. E50 is shown as 'E' then '50'.
3. E20, E28, E50, E125 & E160 indicate faulty components.
You should make a note of the displayed error code and
contact your installer or service engineer.
4. If E110 or E130 is displayed overheat of the primary water
or flue system has occurred. Turn the selector switch to the
reset position and hold for at least 5 seconds. If the boiler
does not relight, or the code is displayed regularly contact your
installer or service engineer.
5. E119 is displayed when the primary water pressure is less
than 0.5 bar. After repressurising the system the boiler should
operate. Your installer will be able to advise you about the
method of repressurising. See page 6 for further details.
6. E133 indicates that the gas supply has been interrupted,
ignition has failed or the flame has not been detected. Ensure
that the gas supply has not been turned off, and turn the
selector switch to the reset position and hold for at least 5
seconds. If the boiler does not relight, or the code is displayed
regularly contact your installer or service engineer.
Central Heating NTC Fault
Flue NTC Fault
Hot Water NTC Fault
Safety Thermostat Operated
Water Pressure Switch Not Operated
Circulation Fault (Primary Circuit)
Flue NTC Operated
Interruption Of Gas Supply or Flame Failure
Fan or Fan Wiring Fault
E20
E28
E50
E110
E119
E125
E130
E133
E160
Table of Error Codes
bar
0
1
2
3
4
Display
Then
Fig. 6

6.0 Legislation
9
© Baxi Heating UK Ltd 2007
6.1 Installation, Commissioning, Service & Repair
1. This appliance must be install in accordance with the
manufacturer’s instructions and the regulations in force.
Read the instructions fully before installing or using the
appliance.
2. In GB, this must be carried out by a competent person
as stated in the Gas Safety (Installation & Use)
Regulations.
3. Definition of competence: A person who works for a
CORGI registered company and holding current
certificates in the relevant ACS modules, is deemed
competent.
4. IN IE (Eire), this must be carried out by a competent
person as stated in I.S. 813 “Domestic Gas Installations”.
All CORGI registered installers carry a CORGI
identification card (see Fig. 7) and have a registration
number. You can check your installer is registered by
telephoning 0870 4012300 or writing to:-
1 Elmwood,
Chineham Business Park,
Crockford Lane,
Basingstoke. RG24 8WG.
or check online at www.corgi-gas-safety.com
The boiler meets the requirements of Statutory
Instrument “The Boiler (Efficiency) Regulations 1993 No
3083” and is deemed to meet the requirements of
Directive 92/42/EEC on the energy efficiency
requirements for new hot water boilers fired with liquid
or gaseous fuels:-
Type test for purpose of Regulation 5 certified by:
Notified Body 0085.
Product/Production certified by:
Notified Bodies 0085 & 0086.
For GB/IE only.
6.2 Benchmark Commissioning Checklist
1. Please ensure that your installer hands you the boiler
Installation & Service Instructions with the “Benchmark
Commissioning Checklist sections completed. The
details in the Checklist will be required in the event of
any warranty work. Keep the instructions in a safe place
and ensure that the Service Interval Record at the back
is completed at each service visit.
Registered
Gas Installer
CARD SERIAL NO. 999999999
NAME:
A.N.Installer
COMPANY:
Newtown Heating
EXPIRES: 31 DECEMBER 2010
PHOTOGRAPH
To confirm validity of this card please contact
CORGI on 0870 401 2300
www.corgi-group.com
CORGI
00000
Fig. 7 CORGI Registration Card