User’s Operating Instructions &
Important Warranty Information
Megaflo 2 System Compact GA
Range
Gas Fired Wall Mounted Condensing
System Boiler
Please keep these instructions in a safe place.
If you move house, please hand them over to the next occupier.
© Baxi Heating UK Ltd 2013
Contents
Section
Model Range
Baxi Megaflo 2 System 12 Compact GA
G.C.No 41-075-70
Baxi Megaflo 2 System 15 Compact GA
G.C.No 41-075-71
Baxi Megaflo 2 System 18 Compact GA
G.C.No 41-075-72
Baxi Megaflo 2 System 24 Compact GA
G.C.No 41-075-73
Baxi Megaflo 2 System 28 Compact GA
G.C.No 41-075-74
Baxi Megaflo 2 System 32 Compact GA
G.C.No 41-075-75
Page
1.0
Quick Reference Guide
3
2.0
Troubleshooting
4
3.0
Temperature Adjustment &
Care of the Boiler
6
4.0
Repressurising System & ‘Service Due’ 7
5.0
Clearances
8
6.0
Error Codes
9
7.0
Legislation
10
8.0
Emergency
11
9.0
Warranty & Service
Back page
The Benchmark Scheme
Baxi Heating UK Ltd is a licensed member of the Benchmark Scheme which aims
to improve the standards of installation and commissioning of domestic heating
and hot water systems in the UK and to encourage regular servicing to optimise
safety, efficiency and performance.
Benchmark is managed and promoted by the Heating and Hotwater Industry
Council. For more information visit www.centralheating.co.uk
© Baxi Heating UK Ltd 2013 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 Limited,
Brooks House, Coventry Road, Warwick. CV34 4LL
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.
Boiler Controls - see opposite page for
Operating Quick Reference Guide
(Fascia Cover removed for clarity)
0086
ISO 9001
FM 00866
2
© Baxi Heating UK Ltd 2013
1.0 Quick Reference Guide
Key to Controls
Boiler Information View
Standby - Reset - Esc
Standby - Reset - Esc
R
Boiler Information View
Increase Boiler Temperature Button
Decrease Boiler Temperature Button
Inactive Button
Inactive Button
On/Off Selector Button
THESE BUTTONS INACTIVE
Central Heating (CH)
Temperature Adjustment
When
is displayed (Boiler On) the boiler will respond to
timed Heating or Hot Water demand.
N.B. If only
is displayed the boiler will not operate !
On/Off Selector Button
NOTE: When altering any settings it is necessary that
the buttons are FIRMLY pressed for several seconds.
Display Description
Boiler in Standby (frost protection still enabled)
R
Indicate errors that prevent burner from starting
Error - Not resettable by user
Water pressure too low
R
Indicates a resettable error
Indicates navigation in programming mode (parameter)
Indicates navigation in programming mode
Generic error
Burner lit
Boiler on
Display showing all available segments
Units for temperature
Units for pressure
R
Service due
© Baxi Heating UK Ltd 2013
3
Boiler not working
2.0 Troubleshooting
START
YES
Make sure the gas
supply is turned ON
and check if other
gas appliances are
operating (e.g. fire,
cooker).
Is there electricity to the
boiler ? Is the display lit ?
Is the Burner Flame
symbol showing ?
YES
R
R
NO
NO
Burner Flame
(Indicates burner
is on)
If no gas, consult
your supplier.
Boiler
Temperature
YES
NO
Central Heating
Boiler operating
satisfactorily.
Check electrical supply to
boiler is switched on.
OR
Is the E and R symbol
illuminated or flashing ?
Error Code
R
YES
Reset
Symbol
Flame
Failure
Is the Spanner symbol
illuminated or flashing ?
R
Spanner
Symbol
Error
Symbol
YES
YES
Press the Reset Button
If it does
not reset
Reset Button
4
© Baxi Heating UK Ltd 2013
CONTACT YOUR
INSTALLER OR
SERVICE
ENGINEER.
2.0 Troubleshooting
YES
Is the Timer ON and
calling for heat ?
12
NO
1
Is the Central Heating
System Pressure between 1
and 2.5 bar ?
YES
3
9
YES
NO
2
10
11
Is the Room Thermostat (if
fitted) set high enough ?
15
20
4
8
10
5
25
5
7
6
CH ON
Typical
examples of
external timer
2
1
3
4
0
bar
CH OFF
Turn Room Thermostat
to maximum setting
(typical example shown)
If the reading falls below 1 bar
repressurise the system as
described in section 4.1.
R
NO
5
10
15
20
25
Ensure timer is set for Central
Heating ON (see any
instructions supplied with timer)
Error Code 118 showing low
pressure.
*To display the water pressure
press
6 times. ‘05’ will
alternate with the system pressure.
(NOTE: When the pump is running
the gauge under the boiler may
show a slightly differnt reading to
the display)
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
© Baxi Heating UK Ltd 2013
5
3.0
3.1
Display Screen
THESE BUTTONS
INACTIVE
Temperature Adjustement &
Care of the Boiler
To increase or decrease the boiler temperature
1. Press the (
) to increase the boiler temperature.
2. Press the (
) to decrease the boiler temperature.
Central Heating
Temperature Adjustment
On/Off Selector Button
R
NOTE: An overheat thermostat (NTC) is positioned in the
heat exchanger which shuts down the appliance if the
boiler temperature exceeds 100°C. Press
button
to re-establish normal operating conditions.
R
3.2
Boiler On Selector
1. Press the
appears:-
3.3
button until the Boiler On mode
Cleaning the Outercase
The painted panels should be wiped with a damp cloth and
then dried completely. DO NOT USE ABRASIVE CLEANING
AGENTS.
3.4
Boiler Frost Protection
1. The boiler incorporates an integral frost protection feature
that will operate when the boiler is on, and also when in
standby ( displayed).
2. If the boiler temperature falls below 5° C, then the boiler
will operate until the water temperature has been raised.
3. Further protection may be required for the system. Consult
your installer for details.
The
button can be pressed so that the display shows the following
information:1 press - ‘00’ alternates with Sub-Code (only when fault on boiler) or ‘000’
2 presses - ‘01’ alternates with CH Flow Temperature
3 presses - ‘02’ alternates with Outside Temperature (where Sensor fitted)
4 presses - ‘03’ alternates with DHW Temperature
5 presses - ‘04’ alternates with DHW Temperature
6 presses - ‘05’ alternates with System Water Pressure
7 presses - ‘06’ alternates with CH Return Temperature
8 presses - ‘07’ alternates with Flue Temperature
9 presses - ‘08’ alternates with Heat Exchanger Temperature
6
© Baxi Heating UK Ltd 2013
3.5
Information Display
1. The table opposite shows information that can be displayed
by pressing the
button.
2. Press
R to return to the normal display.
4.0 Repressuring System & ‘Service Due’
4.1
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 (E117
displayed). Contact your installer.
Front and Side Panel
removed for clarity
2. It may be necessary to repressurise the system
occasionally (as Fig. 2 or E118 displayed). A filling device
(the filling loop) will be fitted on the system. This will be
on the boiler itself, or on pipework near to the boiler.
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
copper pipe or braided hose with connection fittings.
View Under
Appliance
Pressure Gauge
5. Only when repressurising should the pipe or hose be
connected between the two taps. Ensure that the nuts
on the pipe or hose are tightened onto the taps.
2
1
3
7. The system pressure is shown at all times on the gauge
under the boiler and can be viewed on the display when
there is power to the boiler.
4
0
bar
8. To display the water pressure press
6 times. ‘05’
will alternate with the system pressure. (NOTE: When
the pump is running the gauge under the boiler may
show a slightly different reading to the display).
Fig. 1
Normal Pressure
2
9. When the needle on the gauge or figures on the
display indicate 1 or more turn both taps off.
1
3
4
0
Fig. 2
6. Fully open one of the taps first, and then while
watching the pressure gauge, carefully open the second
tap.
bar
10. Disconnect the pipe or hose from the taps (a small
amount of water may be present) and remove it. Keep it
in a safe place for future use.
4.2
Requires
Repressurising
‘Service Due’ Message
1. After 11 months operation the ‘Service Due’ message will
be shown on the boiler display.
R
‘Service Due’
Message
2. Please contact your Installer, Annual Service Provider or
‘heateam’ - The Service Division of Baxi to arrange your
Annual Service. You can contact ‘heateam’ on telephone
number 0844 8711 545 or visit www.heateam.co.uk
‘Sd’ will show for
three seconds,
alternating with the
boiler temperature.
© Baxi Heating UK Ltd 2013
7
5mm Min
390mm (32 kW models - 450mm)
5mm Min
5.0 Clearances
175mm Min
(300mm Min if using
80/125 flue system)
5.1
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.
700mm (32 kW
models - 763mm
GB - Heating Industry definition meaning England, Scotland,
Wales, Northern Ireland, Isle of Man and the Channel Isles.
3. Your boiler must not be operated without the casing
correctly fitted.
4. Do not interfere with any sealed components on this
boiler.
Fig. 3
5. Take note of any warning labels on your boiler.
6. Your boiler should have the following minimum
clearances for Safety and Maintenance
(Figs. 3 & 4):150mm* Min
Top
Bottom
Left side
Right Side
Front
At least
1.5°
- 175mm
- 150mm*
- 5mm
- 5mm
- 5mm (In Operation)
- 450mm (For Servicing)
*This is MINIMUM recommended dimension. Greater
clearance will aid installation and maintenance.
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.
450mm
For Servicing
Purposes
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.
5mm
In Operation
32 kW models - 355mm,
Fig. 4
8
300mm
(290mm with flap removed)
(345mm with flap removed)
© Baxi Heating UK Ltd 2013
6.0 Error Codes
6.1
List of Error Codes
1. The display shows two types of signals:
and R .
In both cases the display shows
symbol and the numeric
value of the error (see the “error table” below).
2.
The spanner cannot be reset by the user. Please
contact your Installer, Annual Service Provider or ‘heateam’ The Service Division of Baxi to arrange your Annual Service.
You can contact ‘heateam’ on telephone number 08448 711
545 or visit www.heateam.co.uk
3. R Fault errors can be resetting by pressing the
button.
Table Of Error Codes
09
Gas Valve Connection Cable
15
Gas Valve Fault
20
Central Heating NTC Fault
28
Flue NTC Fault
40
Central Heating Return NTC Fault
55
Calibration Required
109
Pre-circulation Fault
110
Safety Thermostat Operated
117
Primary System Water Pressure Too High
118
Primary System Water Pressure Too Low
125
Circulation Fault (Primary)
128
Flame Failure
130
Flue NTC Operated
133
Interruption Of Gas Supply or Flame Failure
134
Elapsed Time - Gas Valve Open Without Gas
135
Interruption Of Gas Supply (Internal Error)
154
Flow/Return Sensor Temperature Test
160
Fan or Fan Wiring Fault
270
Circulation Fault (Dry Fire)
321
Hot Water NTC Fault
384
False Flame
© Baxi Heating UK Ltd 2013
R
WARNING: If an error code (is different from the ones
described below) appears on the display or a certain fault
appears frequently, contact ‘heateam’.
9
7.0 Legislation
7.1
Installation, Commissioning, Service & Repair
1. This appliance must be installed 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 Gas
Safe 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”.
Lifting - This product should be lifted and handled by two
people. Stooping should be avoided and protective equipment
worn where necessary. Carrying & lifting equipment should be
used as required, e.g. when installing in a loft space.
All Gas Safe registered engineers carry an ID card with their
licence number and a photograph. You can check your
engineer is registered by telephoning 0800 408 5500 or online
at www.gassaferegister.co.uk
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 Body 0086.
Ref: 86-BL-647
For GB/IE only.
7.2
Benchmark Commissioning Checklist
1. Please ensure that the installer has fully completed the
Benchmark Checklist on the inside back pages of the
installation instructions supplied with the product and that you
have signed it to say that you have received a full and clear
explanation of its operation. The installer is legally required to
complete a commissioning checklist as a means of complying
with the appropriate Building Regulations (England and
Wales).
2. All installations must be notified to Local Area Building
Control either directly or through a Competent Persons
Scheme. A Building Regulations Compliance Certificate will
then be issued to the customer who should, on receipt, write
the Notification Number on the Benchmark Checklist.
3. This product should be serviced regularly to optimise its
safety, efficiency and performance. The service engineer should
complete the relevant Service Record on the Benchmark
Checklist after each service.
4. The completed Benchmark Checklist may be required in the
event of any warranty work.
10
© Baxi Heating UK Ltd 2013
8.0 Emergency
Warning !
If you smell gas
Do not operate light switches
Do not operate any electrical equipment
Do not use a telephone in the hazardous area
Extinguish any naked flame and do not smoke
Open windows and doors in the hazardous area
Turn off the gas supply at the meter
Warn any other occupants and vacate the premises
Telephone the National Gas Emergency Service on:0800 111 999
Faulty boiler
If it is known or suspected that there is a fault on the
boiler that cannot be manually reset, it must not be
used until the fault has been corrected by a competent
person.
In an Emergency
Yellow Tap - Gas
1. If a water or gas leak occurs or is suspected, the boiler
can be isolated at the inlet valves by turning their taps
through 90° (1/4 turn) downwards
2. Please contact your Installer, Annual Service Provider or
‘heateam’ - The Service Division of Baxi. You can contact
‘heateam’ on telephone number 0844 871 1525 or visit
www.heateam.co.uk as soon as possible.
Black Taps - Water
© Baxi Heating UK Ltd 2013
11
Please complete the boxes below
9.0 Warranty & Service
Serial Number
Standard Warranty Terms & Conditions
To activate your second year free warranty you must register your boiler with
heateam the service division of Baxi Heating UK Ltd either by completing and
returning the registration card or calling our telephone registration line on
0800 013 7989.
Date of Installation
D D M M Y Y
Installer Details (name, address and contact number(s))
It is also a requirement of the warranty that the boiler has an annual service
(every 12 months) in accordance with the installation and servicing
instructions, performed by a Gas Safe registered engineer.
If you would like heateam to carry this out please call on 0844 871 1525.
Our promise to you
If you experience a fault with your new boiler, we aim to provide a safe and
high quality repair service supported by our dedicated national network of
highly skilled engineers. If your installer can’t resolve the problem for you, we
will do everything we can to get an engineer out to you as quickly as possible.
Nothing in this warranty will affect your statutory consumer rights.
What you need to do if you experience a problem with your heating system
or the operation of the boiler
You should always contact your installer first, because the cause of the fault
may not be related to the boiler. If your installer confirms that the fault is with
the boiler and he/she can’t repair it, our friendly customer service team is on
hand to help. Simply call our service division heateam on 0844 871 1525 to
book an engineer visit or for any general advice that you may need. Our
contact centre is open Monday to Friday 8am - 6pm, weekends and Bank
Holidays 8.30am - 2pm, excluding Christmas Day and New Years Day.
When calling heateam it would be helpful if you could have the following
information to hand:1
2
3
4
Boiler serial number (see opposite).
Boiler make and model number.
Your installer name and address details.
Proof of purchase (if you do not have the boiler serial number).
What this warranty covers
Free of charge repair or replacement of components found to be of faulty
manufacture.
Free of charge replacement of the complete unit provided always that the
failure is related to a manufacturing fault that cannot be repaired or is
uneconomic to repair.
Lift Flap for access to
Information Label
What this warranty does not cover
Repairs to boilers which haven’t been installed and commissioned properly,
and as set out in the installation instructions (this includes the need to flush the
system effectively and add a suitable corrosion inhibitor).
Any damage caused by hard water scale deposits and/or aggressive water
resulting from corrosion.
Any other defects or failures, either in the connected heating system or
outside of the boiler itself.
Faults caused by inadequate supply of electricity, gas or water to the property.
All descriptions and illustrations provided in this leaflet have been carefully
prepared but we reserve the right to make changes and improvements in
our products which may affect the accuracy of the information contained in
this leaflet. All goods are sold subject to our standard Conditions of Sale
which are available on request.
BAXI
A Tr a d in g D i v i s i on o f B ax i H eat i ng U K Lt d ( 3879156)
Brooks House, Coventry Road, Warwick. CV34 4LL
After Sales Service 0844 871 1525 Technical Enquiries 0844 871 1555
Website www.baxi.co.uk
e&oe
© Baxi Heating UK Ltd 2013
Installations within commercial settings for which this boiler was not designed.
Reimbursement of any third party repair or replacement costs that we haven’t
been told about or agreed with you in advance.
Compensation for consequential losses (e.g. loss of earnings, business losses,
stress and inconvenience) arising from a production breakdown, including
repair delays caused by factors outside our reasonable control.
After Sales Service 0844 871 1525
Comp No 7206339 - 07 (6/13)