Baxi Platinum 2 Combi 28 GA Instruction Manual

© Baxi Heating UK Ltd 2011
Please keep these instructions in a safe place.
If you move house, please hand them over to the next occupier.
Platinum2CombiGARange
Gas Fired Wall Mounted Condensing
Combination Boiler
i-THINK Set Up Guide,
User’s Operating Instructions &
Important Warranty Information

2© Baxi Heating UK Ltd 2011
© Baxi Heating UK Ltd 2011 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,
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.
1.0 Quick Reference Guide 3
2.0 Troubleshooting 4
3.0 Setting the Time 6
4.0 Setting the Central Heating Times 7
5.0 Mode Selection/Temp Adjustment 9
6.0 Resetting the Boiler 13
7.0 Repressurising System 14
8.0 Clearances 15
9.0 Legislation 16
10.0 Care of the Boiler 17
11.0 Fault Finding 18
12.0 Notes 19
13.0 Warranty & Service 20
Section Page
Contents
Boiler i-THINK Controller - see opposite
page for Operating Quick Reference
Guide
0085
ISO 9001
FM 00866
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
Natural Gas
Baxi Platinum 2 Combi 28 GA
G.C.No 47-075-61
Baxi Platinum 2 Combi 33 GA
G.C.No 47-075-62
Baxi Platinum 2 Combi 40 GA
G.C.No 47-075-63

1.0 Quick Reference Guide
3
© Baxi Heating UK Ltd 2011
Burner in Operation
Heating to the Comfort Setpoint
Heating to the Reduced Setpoint
Central Heating Times Active
DHW Time Active
Combustion Check Function Active
Holiday Function Active
Manual Override
Time Switch Function Active
i-THINK Controller & Main PCB Established
i-THINK Controller Programmed as Room Sensor
Error Message
Standby - Appliance ON/OFF (OFF = Frost Protection)
Outdoor Sensor Connected
System / Appliance Attention Required
Maintenance / Special Mode
Water Pressure too low
Change Battery (only if radio control fitted)
Text 3
Text 1
Text 2
Display showing all available segments
Display Descriptions
i-THINK Controller
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Menu Button
Easy Menu
Button Selector Button (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 Selector
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 - Not applicable
3. Central heating mode CH1 - Easy access to change the
operating mode see Section 5.1
4. Room temperature CH1 - The central heating temperature
can be altered permanently.
5. Hot water mode - Easy access to change the operating
mode On or Off (Eco function - not applicable)
6. Hot water temp setpoint - The hot water temperature can
be altered permanently.
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 Troubleshooting
4© Baxi Heating UK Ltd 2011
Boiler not working
START
Make sure the gas
supply is turned ON
and check if other
gas appliances are
operating (e.g. fire,
cooker).
NO
If no gas, consult
your supplier.
Is there electricity to the
boiler ? Is the display lit ?
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Check electrical supply to
boiler is switched on.
NO
YES Is the Burner Flame
showing.
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Burner Flame
(Indicates burner
is on)
Boiler operating
satisfactorily.
NO
YES
YES
YES Is the E symbol illuminated ?
Yes
157: Boiler flow thermostat
Reset ?
Error
YES
Press the Selector Button to Reset
Error
Symbol
If it does
not reset
CONTACT YOUR
INSTALLER OR
SERVICE
ENGINEER.
266:Fan Fault
Error
Is the Crossed out Flame and
Spanner symbol illuminated or
flashing ?
YES
Spanner
Symbol
Boiler
Temperature
Central Heating
Error Code
Flame
Failure
OR
Selector Button
To reset - Press the Selector
Button and the Yes / No mode
will appear. While flashing turn
the Selector Button to toggle
between Yes and No. Select
Yes and press the Selector
Button to select.

2.0 Troubleshooting
5
© Baxi Heating UK Ltd 2011
Is the Timer ON and
calling for heat ?
Is the Room Thermostat (if
fitted) set high enough ?
12
1
2
3
4
5
6
7
8
9
10
11
Typical
examples of
external timer
Ensure timer is set for Central
Heating ON (see any
instructions supplied with timer)
NO
YES YES
NO
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
CH ON CH OFF
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 4.1.
NO
0.5
118:Water pressure too low
Error
Error Code 118 showing low
pressure.
YES

3.0 Setting the Time
6© Baxi Heating UK Ltd 2011
3.1 Time Setting
The time, day, date and year can be adjusted using the i-THINK
Controller as shown below.
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i-THINK Controller
Menu Button
Display Screen
Set time and date
---------------------------------------------------
Information
Operator section
Information
Set time and date
Hours / minutes 09:07
Set time and date
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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 Selector Button
clockwise to highlight Set time
and date Press the Selector Button to
select .
Press the Selector Button and
the hour number flashes. Turn
Selector Button to the required
hour.
Hours / minutes 11:07
Set time and date
Press the Selector Button and
the minute number flashes.
Turn the Button to the required
minute. Press the Selector
Button.
Hours / minutes 11:30
Set time and date
Day / month 05:06
Set time and date
Turn the Selector Button
clockwise until Day / month is
shown. Press the Selector Button
and the month number flashes.
Turn Button to the required
month.
Day / month 03:06
Set time and date
Press the Selector Button and
the day number flashes. Turn
Button to the required day.
Press the Selector Button.
Year 2008
Set time and date
Turn the Selector Button
clockwise until Year is shown.
Press the Selector Button and
the year number flashes. Turn
Button to the required year.
Year 2009
Set time and date
Press the Selector Button.
Time setting is now complete.
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1.6 bar
Press the MENU button
twice to return to normal
display screen.
Selector Button
STEP 1 STEP 2
STEP 3 STEP 4
STEP 5 STEP 6
STEP 7 STEP 8
STEP 9 STEP 10
STEP 11
Easy Menu
Button

4.0 Setting the Central Heating Times
7
© Baxi Heating UK Ltd 2011
i-THINK Controller
Menu Button
Display Screen
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Selector Button
4.1 Programming the Central Heating Times
The i-THINK Controller 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 has 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 Programmer and Room
Sensors, each room/floor must be programmed using the
respective Programmer and Room Sensor. 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.
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---------------------------------------------------
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 central heating CH3
Operator section
Time central heating CH1
Mon - Sun
Select days
Time central heating CH1
Turn the Selector Button
clockwise to highlight ‘Time
central heating CH1’. Press the Selector Button to
select .
Press the Selector Button and
the day / days regime flashes.
Turn Button to the required
day or days Mon-Sun, Mon-
Fri, Sat-Sun
Mon, Tue, Wed,
Thu, Fri, Sat, Sun
Press Selector
Button to select.
Mon - Sun
Select days
Time cental heating CH1
Turn the Selector Button 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 Selector Button and
the time program regime flashes.
Turn Button to the ‘Time setting
1’. Press Selector Button to
select and the screen goes back
to STEP 6.
06:00
Mon - Sun: 1st Time ON
Time central heating CH1
Turn the Selector Button one
click clockwise.
STEP 1 STEP 2
STEP 3 STEP 4
STEP 5 STEP 6
STEP 7 STEP 8
Easy Menu
Button
NOTE:When fitting the boiler to an existing
installation it may be desired to retain the external
control system already in place. In such circumstances
the i-THINK Controller should be set to ‘On’ heating
operation with no timed periods - see Section 5.1
Selecting the Central Heating Mode (as the external
control system will control the timed periods).

4.0 Setting the Central Heating Times
8© Baxi Heating UK Ltd 2011
4.1 Programming the Central Heating Times (cont)
11:00
Mon - Sun: 2nd Time ON
Time central heating CH1
Press the Selector Button and
the ‘2nd Time ON’ time will
flash. Turn the Button to the
required time. Press Selector
Button to select.
11:50
Mon - Sun: 2nd Time ON
Time central heating CH1
Turn the Selector Button 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 Selector Button one
click clockwise.
Turn the Selector Button one
click clockwise and then press
the Button. The ‘2nd Time OFF’
time will flash. Turn the Button
to the required time. Press the
Selector Button 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 Selector Button one
click clockwise and then press
the Button. The ‘3rd Time
OFF’ time will flash. Turn the
Button to the required time.
Press the Selector Button to
select.
Press the Selector Button and
the ‘3rd Time ON’ time will
flash. Turn the Button to the
required time. Press Selector
Button to select.
STEP 11 STEP 12
STEP 13 STEP 14
STEP 15 STEP 16
Menu Button
Selector Button
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Easy Menu
Button Display Screen
08:00
Mon - Sun: 1st Time ON
Time central heating CH1
Press the Selector Button and
the ‘1st Time ON’ time will
flash. Turn the Button to the
required time. Press Selector
Button to select.
10:00
Mon - Sun: 1st Time OFF
Time central heating CH1
Turn the Selector Button one
click clockwise and then press
the Button. The ‘1st Time
OFF’ time will flash. Turn the
Button to the required time.
Press the Selector Button 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.
i-THINK Controller
Press the MENU button
twice to return to normal
display screen.
NOTE:The heating times will not become
active until the i-Think controller is set to
the relevant cental heating mode ie. Reduced
or Timed - see Section 5.1 Selecting the
Central Heating Mode.
If no 3rd Time Period is needed, keep the ON and OFF
period as --:-- and press the Selector Button to set.

5.0 Mode Selection/Temp Adjustment
9
© Baxi Heating UK Ltd 2011
5.1 Selecting the Cental Heating Mode
1. There are 4 central heating modes: -
On - heating operates to keep the dwelling at
the comfort set point chosen by the
householder continuously ie. 24hr/day,
initially set at 20°C.
Reduced - heating operates to keep the dwelling at
the reduced setpoint chosen by the
householder continuously, initially set at
5°C (min 5°C - max 20°C).
Timed - heating operates to keep the dwelling at
the comfort setpoint chosen by the
householder according to the programme
times, initially set at 20°C (min 10°C - max
35°C).
Off - frost protection - boiler operates to
keep the flow temperature above 5°C
continuously.
2. The central heating mode can be set using either the i-THINK
Controller on the appliance or as a room unit (Programmer and
Room Sensor).
3. To select the mode required: - from the main screen press
the Menu Button.
4. Turn Selector Button to ‘Temps / mode CH1’.
Press Selector Button twice to select and turn the Button either
anticlockwise or clockwise to the required heating mode: On –
Reduced – Timed – Off, press Selector Button to select.
5.2 Further Information
1. The user must be aware that in the Timed mode the i-THINK
Controller is not inactive in between the programmed times, the
frost protection/reduced temperature period is constantly in the
background and will cause the appliance to come on if the room
temperature falls below the reduced temperature setpoint (5°
default) or 5°C during frost protection.
NOTE: Adjustment of the room temperature during these
periods will result in a temporary change to the reduced
temperature setting until the next On period is activated.
2. The central heating may be switched on at any time by
increasing the room temperature setpoint to a greater value
than the indicated room temperature whether in or out of a
programmed period. This setpoint change will remain active until
the next programmed On period when the setpoint will revert
to the permanent comfort setpoint.
Temps / mode hot water
Temps / mode CH1
Holidays heating CH1
Turn the Selector Button
clockwise to highlight ‘Temps /
mode CH1’.
Menu Button
Selector Button
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Easy Menu
Button
On
Operating mode
Temps / mode CH1
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1.6 bar
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.
Press the Selector Button twice
and then turn the Button either
anticlockwise or clockwise to the
required heating mode i.e. On
or Reduced or Timed or Off.
Press the Selector Button to
select.
STEP 4
STEP 3
STEP 2
STEP 1
i-THINK Controller

5.0 Mode Selection/Temp Adjustment
10 © Baxi Heating UK Ltd 2011
5.3 Adjusting the Domestic Hot Water Temperature
Menu Button
Selector Button
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1.6 bar
Easy Menu
Button Display Screen
04. November 2008 08:50
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1.6 bar Set time and date
---------------------------------------------------
Information
Instantaneous HW heater
Temps / mode CH1
Temps / mode hot water
On
Operating mode
Temps / mode hot water
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 Selector Button
clockwise to highlight Temps /
mode hot water.
Press the Selector Button to
select .
50 °C
Hot water temp setpoint
Temps / mode hot water
Turn Selector Button to the
required temperature. Press
the Selector Button to select.
Temperature setting is now
complete.
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1.6 bar
Press the MENU button
twice to return to normal
display screen.
STEP 1 STEP 2
STEP 3 STEP 4
STEP 5 STEP 6
STEP 7 STEP 8
55°C
Hot water temp setpoint
Temps / mode hot water
55 °C
Hot water temp setpoint
Temps / mode hot water
Turn the Selector Button
clockwise to highlight Hot water
temp setpoint.
Press the Selector Button and
the temperature degree
number will flash.
i-THINK Controller