Baxi ECOGEN 24/1.0 Operation instructions

© Baxi Heating UK Ltd 2010
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.
Ecogen 24/1.0
Gas Fired Wall Mounted Condensing Boiler
and Power Generator

2© Baxi Heating UK Ltd 2010
Natural Gas
Baxi Ecogen 24
G.C.No41 075 60
© Baxi Heating UK Ltd 2010 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 Introduction 4
3.0 The Programmers 5
4.0 Setting the Time 6
5.0 Setting the Central Heating Times 7
6.0 Setting the DHW Times 9
7.0 Mode Selection/Temp Adjustment 11
8.0 Contents of Other Functions 14
9.0 Resetting the Boiler 16
10.0 Clearance 17
11.0 Error Codes 18
12.0 Care of the boiler 20
13.0 Legislation 21
14.0 Notes 22
Section Page
Contents
Boiler Controls - see opposite page
for Operating Quick Reference Guide
This appliance contains a pressure vessel filled with Helium to 23 bar.
Do not strike, drop, drill or puncture the vessel.
Do not unbolt any of the covers or flanges.
The vessel contains no user serviceable parts.
Dispose of safely.
0086
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
Legionella
If the DHW cylinder has been fitted with a control sensor instead of a thermostat
for increased efficiency, the control will recognise this and automatically initiate an
anti-legionella function. In this case the user should be aware that once a week the
DHW set point is overridden and the cylinder is heated to 65° C for 10 minutes.
The default time for this action is monday 8am every week.
If the set point has been reduced to say 40° C for safety reasons, the users must
bear in mind that the temperature around this time may be much hotter than usual.
The time of the function may be altered or the action disabled.
This appliance contains a small scale embedded generator (SSEG).
Both the District Network Operator and the Electricity Provider
must be informed, this is a legal requirement - see section 12.3.

1.0 Quick Reference Guide
3
© Baxi Heating UK Ltd 2010
Burner in Operation 1 - Engine 2 - Supplementary
Heating to the Room temperature Set Point
Heating to the Reduced Set Point
Central Heating Times Active
DHW Time Active
Combustion Check Function Active
Holiday Function Active
Manual Overide
Time Switch Function Active
Communication between POU & PCB Control Established
POU Programmed as Room Unit
Error Message
Standby - Appliance ON/OFF
Outdoor Sensor Connected
System / Appliance Attention Required
Maintenance / Special Mode
Change Battery (only if radio control fitted)
Text 3
Text 1
Text 2
Display showing all available segments
Display Descriptions
Programmable Operator Unit (POU)
04. November 2008 08:50
Tuesday
Menu Button
Easy Menu
Button Dial Knob (Turn /Push Select)
The Easy menu button
Commonly required functions are available more quickly via the
easy menu button. To access, press the easy menu button and
scroll through confirm your selection by pressing the dial
button.
Commonly required functions are shown in order below: -
1. Standby/operation - the on/off switch - in the off mode frost
protection for the appliance is active: displays when in
standby.
2. Hot water boost - The domestic hot water is heated to the
required temperature once.
3. Central heating mode CH1 - easy access to change the
operating mode see Section 7.1
4. Room temperature CH1 - The central heating setpoint
temperature can be altered permanently.
5. Hot water mode - easy access to change the operating
mode see Section 7.4
6. Hot water temp setpoint - The hot water setpoint
temperature can be altered permanently as long as a tank
sensor is fitted. If no sensor is fitted --- appears.
24 hour time bar for central heating and domestic
hot water - shows active programme times
- Default 6am - 9am, 11am - 12pm & 15pm - 22pm
Standby

2.0 Introduction
4© Baxi Heating UK Ltd 2010
2.1 Description
1. The appliance incorporates a Stirling engine which is capable of
generating between 0.4 – 1.0 kW of electrical power depending on
the running conditions of the heating system. High return
temperatures especially above 65°C will reduce the power generation.
It is therefore in the interests of the householder to ensure that the
central heating system is maintained and working as efficiently as
possible. Balance the radiators in the central heating system so that
there is suitable drop in temperature across each radiator. 20°C is
optimum for new systems but some older radiators originally installed
with non condensing appliances may only manage 11°C.
2. The use of a programmable room unit incorporating a room
sensors (as apposed to a room thermostat) will also improve the
power generation.
3. If the return temperature to the appliance gets too hot the engine
burner will switch off to protect the engine – in this case the
supplementary burner will light on its own until the return
temperature has cooled sufficiently and the engine burner will be
enabled again.
4. The electricity generated in this manner if not consumed directly by
the user is fed back into the grid. Arrangements can be made with the
electricity provider to compensate the householder by way of a feed-
in tariff. See section 13.3.
5. It is your responsibility to contact your electricity supplier and
inform them that you have installed a Baxi Ecogen which will generate
electricity. This is a legal requirement.
6. Operation and control is similar to a domestic boiler and is fully
automatic.
7. All interactions with the appliance are either through the removable
Programmable Operator Unit (POU) on the front of the appliance or
on a remote wall cradle.
2.2 Important Notes
1. Read and follow these instructions thoroughly before switching on
and operating this appliance. These instructions must be followed and
warning labels must be adhered to.
2. As with any domestic boiler, flammable materials MUST NOT be
placed near this appliance and materials emitting flammable vapours
must not be stored in the same room.
Do not position a kettle or toaster directly below the appliance.
3. The appliance MUST NOT be tampered with, abused or any sealed
components adjusted as this may result in a hazardous situation.
4. Please note that because of the high efficiency of the appliance,
condensate (water) is produced from the flue gases. A condensate
‘plume’ (water vapour) may also be seen coming out of the flue.
Gas Connection
5. Your Baxi Ecogen appliance has been installed by a Gas Safe
registered installer– this is both good safe working practice and
complies with the current gas safety regulations.
Electrical Connection
6. Your Baxi Ecogen appliance has been installed in accordance with
the Installation Instructions, this means that:
The appliance has been earthed.
The electricity supply to the appliance is 230V ~ 50Hz.
7. Connection to the electricity supply has been made in a way that
allows complete isolation of the electricity supply from the appliance.
The isolation switch is located in an accessible position within your
installation.
8. It is a legal requirement that both the District Network Operator
(DNO) and the electricity provider are informed of the installation of
this appliance - see section 13.3.
NOTE: In the event of a power failure the appliance will turn off
automatically and will not restart for at least 3 minutes after the
power supply has been restored.
POU
Wall Cradle (Accessory)
POU

3.0 The Programmers
5
© Baxi Heating UK Ltd 2010
3.1 Getting Started
1. Ensure that both gas and electricity are turned on to the
appliance.
2. The Gas Safe registered installer will have set-up the appliance to
a programme of your choice and it should be providing heat and
hot water in line with your requirements. These can be altered via
the wall-mounted room unit or the programmer on the product
fascia, both of which are shown in this section. Section 4.0 and 5.0
detail how the timings and settings for your heating and hot water
can be changed.
3.2 Programmable Operator Unit (POU)
1. This is located at the base of the appliance on the front cover. It
displays important information about how the appliance is working
and allows you to alter settings to configure the operation to your
requirements.
2. It can be removed from the appliance to act as a programmable
room unit (PRU) when mounted in a wall cradle accessory. This
then becomes a temperature sensor and programmer.
3. If your Ecogen appliance has been installed using the existing
room temperature and time controls the installer should have
made sure that the appliance programs for the central heating and
domestic hot water are set to 24hr operation – see sections 7.1
and 7.3 - choose ‘On’ in both cases.
4. Refer to the instructions for the existing programmers for setting
the timed periods and the room temperatures. The programmable
operating unit will display the boiler flow temperature and any
errors see section 9 onwards.
3.3 POU as a Programmable Room Unit (PRU)
1. The Room Unit Wall Cradle accessory is available in two
formats.
a) Hard Wired i.e fixed to a wall, the screen illuminates upon
operation.
b) Radio Frequency, cradle mounted and portable, with no
permanent screen illumination.
2. The Radio Frequency unit is powered by three AA batteries
located in the rear of the unit behind a slide down panel. If battery
power is depleted a warning symbols appears on the display
screen, replace the batteries.
3. The operation of both Radio Frequency and hard wired units is
identical.
3.4 5 LED Unit
1. The 5 LED Unit is fitted when the POU is removed and gives
basic information about the state of the appliance:-
1st Green - Mains On
2nd Green - Communication Status
1st Yellow - Engine Burner On
2nd Yellow - Supplementary Burner On
Red - Fault Present
2. The Reset Button may be used to reset User Errors - see
Section 11.0.
5 LED Unit
Wall Cradle (Accessory)
POU
Reset Button

4.0 Setting the Time
6© Baxi Heating UK Ltd 2010
4.1 Time Setting
The time, day, date and year can be adjusted using the
POU/PRU as shown below.
04. November 2008 08:50
Tuesday
Menu Button
Display Screen
Set time and date
---------------------------------------------------
Information
Operator section
Information
Set time and date
Hours / minutes 09:07
Set time and date
04. November 2008 08:50
Tuesday
The basic display is shown.
If the basic display is not
showing, press the MENU
button. until the
basic display is shown
Press the MENU button.
Turn the Dial Knob clockwise
to highlight ‘Set Time and
Date’. Press the Dial Knob to
select .
Press the Dial Knob and the
hour number flashes. Turn
Dial to the required hour.
Hours / minutes 11:07
Set time and date
Press the Dial Knob and the
minute number flashes. Turn
Dial to the required minute.
Press the Dial Knob.
Hours / minutes 11:30
Set time and date
Day / month 05:06
Set time and date
Turn the Dial Knob clockwise
until Day / month is shown.
Press the Dial Knob and the
month number flashes. Turn
Dial to the required month.
Day / month 03:06
Set time and date
Press the Dial Knob and the
day number flashes. Turn Dial
to the required day. Press the
Dial Knob.
Year 2008
Set time and date
Turn the Dial Knob clockwise
until Year is shown. Press the
Dial Knob and the year
number flashes. Turn Dial to
the required year.
Year 2009
Set time and date
Press the Dial Knob. Time
setting is now complete.
03. June 2009 11:30
Wednesday
Press the MENU button
twice to return to normal
display screen.
Dial Knob
STEP 1
STEP 3
STEP 2
STEP 3 STEP 4
STEP 5 STEP 6
STEP 7 STEP 8
STEP 9 STEP 10
STEP 11

5.0 Setting the Central Heating Times
7
© Baxi Heating UK Ltd 2010
Menu Button
Display Screen
04. November 2008 08:50
Tuesday
Dial Knob
5.1 Programming the Central Heating Times
The programmar enables control of up to three periods a day,
seven days a week.
There are 3 time programs preinstalled to aid reprogramming:-
Time program 1 is the default with 3 time periods - Mon-Sun,
6-9, 11-12 and 15-22.
Time program 2 has two time switch periods - Mon-Sun, 6-9
and 15-22.
Time program 3 has one time switch period 6-22.
‘Preselection’ regimes are: Mon-Sun (Default) Mon-Fri and Sat-Sun
or each day individually.
If there are two heating circuits with two PRU’s each room/floor
must be programmed using the respective PRU. Choose the
relevant heating circuit at STEP 3.
When programming individual days, the opportunity to copy one
day to another is offered (screen 529). Lastly screen 536 enables a
reset to the default values as given above.
04. November 2008 08:50
Tuesday Set time and date
---------------------------------------------------
Information
The basic display is shown.
If the basic display is not
showing, press the MENU
button. until the
basic display is shown
Press the MENU button.
Time hot water
Operator section
Time central heating CH1
Mon - Sun
Select days
Time central heating CH1
Turn the Dial Knob clockwise to
highlight ‘Time central heating
CH1’. Press the Dial Knob to
select .
Press the Dial Knob and the
day / days regime flashes.
Turn Dial to the required day
or days Mon-Sun, Mon-Fri,
Sat-Sun
Mon, Tue, Wed,
Thu, Fri, Sat, Sun
Press Dial to
select.
Mon - Sun
Select days
Time cental heating CH1
Turn the Dial Knob one click
clockwise.
Select default timings?
Mon - Sun
Time central heating CH1
Set to Time setting 1
Mon - Sun
Time central heating CH1
Press the Dial Knob and the
time program regime flashes.
Turn Dial to the ‘Time setting
1’. Press Dial to select and the
screen goes back to STEP 6.
06:00
Mon - Sun: 1st Time ON
Time central heating CH1
Turn the Dial Knob one click
clockwise.
STEP 1 STEP 2
STEP 3 STEP 4
STEP 5 STEP 6
STEP 7 STEP 8

5.0 Setting the Central Heating Times
8© Baxi Heating UK Ltd 2010
5.1 Programming the Central Heating Times (cont)
11:00
Mon - Sun: 2nd Time ON
Time central heating CH1
Press the Dial Knob and the
‘2nd Time ON’ time will flash.
Turn the Dial Knob to the
required time. Press Dial to
select.
11:50
Mon - Sun: 2nd Time ON
Time central heating CH1
Turn the Dial Knob one click
clockwise.
13:00
Mon - Sun: 2nd Time OFF
Time central heating CH1
15:00
Mon - Sun: 3rd Time ON
Time central heating CH1
Turn the Dial Knob one click
clockwise.
Turn the Dial Knob one click
clockwise and then press the
Dial Knob. The ‘2nd Time OFF’
time will flash. Turn the Dial to
the required time. Press the
Dial to select.
17:00
Mon - Sun: 3rd Time ON
Time central heating CH1
23:00
Mon - Sun: 3rd Time OFF
Time central heating CH1
Turn the Dial Knob one click
clockwise and then press the
Dial Knob. The ‘3rd Time OFF’
time will flash. Turn the Dial to
the required time. Press the
Dial to select.
Press the Dial Knob and the
‘3rd Time ON’ time will flash.
Turn the Dial Knob to the
required time. Press Dial to
select.
STEP 11 STEP 12
STEP 13 STEP 14
STEP 15 STEP 16
Menu Button
Dial Knob
04. November 2008 08:50
Tuesday
Easy Menu
Button Display Screen
08:00
Mon - Sun: 1st Time ON
Time central heating CH1
Press the Dial Knob and the
‘1st Time ON’ time will flash.
Turn the Dial Knob to the
required time. Press Dial to
select.
10:00
Mon - Sun: 1st Time OFF
Time central heating CH1
Turn the Dial Knob one click
clockwise and then press the
Dial Knob. The ‘1st Time OFF’
time will flash. Turn the Dial to
the required time. Press the
Dial to select.
STEP 9 STEP 10
If --:-- appears when adjusting the ON/OFF Time it is
because the ON is the same as OFF. If this is selected the
Time period will disappear. A new Time period can be
introduced by starting from 24.00 and winding backwards.

6.0 Setting the DHW Times
9
© Baxi Heating UK Ltd 2010
Menu Button
Display Screen
04. November 2008 08:50
Tuesday
Dial Knob
6.1 Programming the Domestic Hot Water Times
The programmar enables control of up to three periods a day,
seven days a week.
There are 3 time programs preinstalled to aid reprogramming:-
Time program 1 is the default with 3 time periods - Mon-Sun,
6-9, 11-12 and 15-22.
Time program 2 has two time switch periods - Mon-Sun, 6-9
and 15-22.
Time program 3 has one time switch period 6-22.
‘Preselection’ regimes are: Mon-Sun (Default) Mon-Fri and
Sat-Sun or each day individually.
If there are two heating circuits with two PRU’s each room/floor
must be programmed using the respective PRU. Choose the
relevant heating circuit at STEP 3.
When programming individual days, the opportunity to copy one
day to another is offered (screen 529). Lastly screen 536 enables
a reset to the default values as given above.
04. November 2008 08:50
Tuesday Set time and date
---------------------------------------------------
Information
1. The basic display is shown.
If the basic display is not
showing, press the MENU
button.
Press the MENU button.
Holidays heating CH1
Time central heating CH1
Time hot water
Mon - Sun
Select days
Time hot water
Turn the Dial Knob clockwise
to highlight ‘Time hot water’. Press the Dial Knob to
select .
Press the Dial Knob and the
day / days regime flashes.
Turn Dial to the required day
or days Mon-Sun, Mon-Fri,
Sat-Sun,
Mon, Tue, Wed,
Thu, Fri, Sat, Sun
Press Dial to
select.
Mon - Sun
Select days
Time hot water
Turn the Dial Knob one click
clockwise.
Select default timings?
Mon - Sun
Time hot water
Set to Time setting 1
Mon - Sun
Time hot water
Press the Dial Knob and the
time program regime flashes.
Turn Dial to the ‘Time setting
1’. Press Dial to select and the
screen goes back to STEP 6.
06:00
Mon - Sun: 1st Time ON
Time hot water
Turn the Dial Knob one click
clockwise.
STEP 1 STEP 2
STEP 3 STEP 4
STEP 5 STEP 6
STEP 7 STEP 8

6.0 Setting the DHW Times
10 © Baxi Heating UK Ltd 2010
6.1 Programming the Domestic Hot Water Times (cont)
11:00
Mon - Sun: 2nd Time ON
Time hot water
Press the Dial Knob and the
‘2nd Time ON’ time will flash.
Turn the Dial Knob to the
required time. Press Dial to
select.
11:30
Mon - Sun: 2nd Time ON
Time hot water
Turn the Dial Knob one click
clockwise.
13:30
Mon - Sun: 2nd Time OFF
Time hot water
15:00
Mon - Sun: 3rd Time ON
Time hot water
Turn the Dial Knob one click
clockwise.
Turn the Dial Knob one click
clockwise and then press the
Dial Knob. The ‘2nd Time OFF’
time will flash. Turn the Dial to
the required time. Press the
Dial to select.
17:00
Mon - Sun: 3rd Time ON
Time hot water
19:30
Mon - Sun: 3rd Time OFF
Time hot water
Turn the Dial Knob one click
clockwise and then press the
Dial Knob. The ‘3rd Time OFF’
time will flash. Turn the Dial to
the required time. Press the
Dial to select.
Press the Dial Knob and the
‘3rd Time ON’ time will flash.
Turn the Dial Knob to the
required time. Press Dial to
select.
STEP 11 STEP 12
STEP 13 STEP 14
STEP 15 STEP 16
Menu Button
Dial Knob
04. November 2008 08:50
Tuesday
Easy Menu
Button Display Screen
06:30
Mon - Sun: 1st Time ON
Time hot water
Press the Dial Knob and the
‘1st Time ON’ time will flash.
Turn the Dial Knob to the
required time. Press Dial to
select.
08:30
Mon - Sun: 1st Time OFF
Time hot water
Turn the Dial Knob one click
clockwise and then press the
Dial Knob. The ‘1st Time OFF’
time will flash. Turn the Dial
to the required time. Press the
Dial to select.
STEP 9 STEP 10
If --:-- appears when adjusting the ON/OFF Time it is
because the ON is the same as OFF. If this is selected the
Time period will disappear. A new Time period can be
introduced by starting from 24.00 and winding backwards.