Worcester GREENSTAR CDi CLASSIC REGULAR User manual

UK/IE
USER INSTRUCTIONS
WALL HUNG RSF GAS FIRED CONDENSING REGULAR BOILER
GREENSTAR CDi CLASSIC REGULAR
6 720 812 179-00.1O
FOR OPEN VENTED AND SEALED CENTRAL HEATING SYSTEMS
AND INDIRECTLY FED DOMESTIC HOT WATER
6 720 812 177 (2014/07)
The appliance is for use with:
Natural Gas or L.P.G. (CAT II 2H3P type C13 & C33)
Natural Gas:
30CDi Regular GC number 41-406-33
40CDi Regular GC number 41-406-35
L.P.G:
30CDi Regular GC number 41-406-34
40CDi Regular GC number 41-406-36

2
Preface
GREENSTAR CDi CLASSIC REGULAR – 6 720 812 177 (2014/07)
PREFACE
PLEASE READ THESE INSTRUCTIONS CAREFULLY
These instructions are applicable to the Worcester, Bosch
Group boiler model stated on the front cover only.
These instructions apply in the UK/IE only and must be followed
except for any statutory obligation.
After installation please leave this User instruction Manual,
Installation, Commissioning and Servicing Instructions and
completed Benchmark Checklist with the user.
DEDICATED TO HEATING COMFORT
Thank you for purchasing a Greenstar gas-fired condensing
regular boiler manufactured by Worcester, Bosch Group. The
company prides itself on manufacturing boilers to the strictest
quality control standards throughout every stage of
production.
Worcester, Bosch group has led the field in innovative boiler
design and performance for over 50 years. This heritage means
all our products are of exceptional quality and proven
reliability.
The Greenstar range in particular is extremely energy efficient,
offering you economical running costs and value for money. It
sits in SEDBUK Band A, and is therefore amongst the top
energy rated boilers available.
There is also the reassurance of our no-nonsense 2 years parts
and labour guarantee - backed up by Worcester Total Cover, an
optional complete maintenance scheme to keep your boiler
operating at peak condition and efficiency.
TABLE OF CONTENTS
1 Key to symbols and safety instructions . . . . . . . . . . . 3
1.1 Key to symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 General safety instructions . . . . . . . . . . . . . . . . . . 3
2 General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Operating the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1 Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.2 Switching the boiler on/off . . . . . . . . . . . . . . . . . . 6
3.3 Setting the central heating temperature . . . . . . . 7
3.3.1Controlling the central heating . . . . . . . . . . . . . . . 7
3.4 Frost protection (for the boiler) . . . . . . . . . . . . . . 8
3.4.1Frost protection (for the heating system) . . . . . . 8
3.5 Fault condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.1 Fault finding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.2 Error codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.3 Extreme cold weather . . . . . . . . . . . . . . . . . . . . . 12
5 General notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6 Fault or Breakdown . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
7 Tips on energy saving . . . . . . . . . . . . . . . . . . . . . . . . . 13
8 Your guarantee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
9 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3
Key to symbols and safety instructions
GREENSTAR CDi CLASSIC REGULAR – 6 720 812 177 (2014/07)
1 KEY TO SYMBOLS AND SAFETY
INSTRUCTIONS
1.1 KEY TO SYMBOLS
WARNINGS
The following keywords are defined and can be used in this
document:
•NOTE indicates a situation that could result in damage to
property or equipment.
•CAUTION indicates a situation that could result in minor to
medium injury.
•WARNING indicates a situation that could result in severe
injury or death.
•DANGER indicates a situation that will result in severe
injury or death.
IMPORTANT INFORMATION
ADDITIONAL SYMBOLS
1.2 GENERAL SAFETY INSTRUCTIONS
These installation instructions are intended for gas fitters,
plumbers, heating engineers and electricians.
▶ Read any installation instructions (boiler, heating controls,
etc.) carefully before starting the installation.
▶ Observe the safety instructions and warnings.
▶ Observe national and regional regulations, technical rules
and guidelines.
▶ Record all work carried out.
IF YOU SMELL GAS
A gas leak could potentially cause an explosion. If you smell gas,
observe the following rules.
▶ Prevent flames or sparks:
– Do not smoke, use a lighter or strike matches.
– Do not operate any electrical switches or unplug any
equipment.
– Do not use the telephone or ring doorbells.
▶ Turn off the gas at the meter.
▶ Open windows and doors.
▶ Warn your neighbours and leave the building.
▶ Prevent anyone from entering the building.
▶ Well away from the building: call the National Gas
Emergency Service on 0800 111 999.
INTENDED USE
This boiler must only be used as a heat appliance in a sealed hot
water heating system for domestic purposes.
Any other use is considered inappropriate. Any damage that
results from such use is excluded from liability.
INSTALLATION, COMMISSIONING AND SERVICING
Installation, commissioning and servicing must only be carried
out by a competent, Gas Safe registered engineer.
▶ Carry out a gas tightness test after completing work on gas-
carrying components.
▶ Only use original spares.
ELECTRICAL WORK
Electrical work must only be carried out by a qualified
electrician.
▶ Before starting electrical work:
– Isolate the mains electrical supply and secure against
unintentional reconnection.
– Check for zero potential.
▶ Also observe connection diagrams of other system
components.
Warnings in this document are identified by a
warning triangle printed against a grey
background.
Keywords at the start of a warning indicate the
type and seriousness of the ensuing risk if
measures to prevent the risk are not taken.
This symbol indicates important information
where there is no risk to people or property.
Symbol Explanation
▶ Step in an action sequence
Cross-reference to another part of the document
• List entry
– List entry (second level)
Table 1

4
General Information
GREENSTAR CDi CLASSIC REGULAR – 6 720 812 177 (2014/07)
HANDOVER TO THE USER
When handing over, instruct the user how to operate the
heating system and inform him about its operating conditions.
▶ Explain how to operate the heating system and draw the
user's attention to any safety-relevant action.
▶ Explain that modifications and repairs must only be carried
out by an authorised contractor.
▶ Advise the user to have the system serviced annually by a
competent, Gas Safe registered engineer.
▶ Leave the installation instructions with the completed
Benchmark Checklist (or a certificate confirming
compliance with IS 813, Eire only) and the operating
instructions with the user or at the gas meter.
2 GENERAL INFORMATION
SERVICING
• The boiler must be serviced regularly by a competent,
qualified person, such as a Worcester service engineer or
other Gas Safe registered engineer.
• Always use original spares, to help maintain the efficiency,
safety and reliability of the boiler and have the Service
Record completed in the Benchmark Checklist.
The completed Benchmark Checklist will be required in the
event of any guarantee work and may be required by the local
Building Control Inspector.
BENCHMARK STANDARD
The Benchmark initiative is a
code of practice to encourage the
correct installation,
commissioning and servicing of
domestic central heating boilers
and system equipment.
A “checklist” is dispatched with every boiler. This is a vital
document that needs to be completed by the installer at the
time of installation. It confirms that the boiler has been
installed and commissioned according to the manufacturer's
instructions.
The log book provides space for the recording of regular
servicing of the boiler/heating system and this can become a
valuable document when, for example, you wish to sell the
property. The log book will show a potential purchaser that the
heating system has received regular professional maintenance
and servicing during its lifetime.
The Benchmark initiative aims to:
• Raise standards among professional installers
• Build and maintain high safety standards in the industry
• Improve customer satisfaction levels
• Make a contribution to the nation's commitment to climate
change
Ensure that the service engineer completes the
Service Record in the Benchmark Checklist
after each service. The Benchmark Checklist
and service interval record can be found at the
rear of the Installation, Commissioning and
Servicing Instructions.

5
Operating the boiler
GREENSTAR CDi CLASSIC REGULAR – 6 720 812 177 (2014/07)
3 OPERATING THE BOILER
3.1 CONTROLS
Fig. 1 Control panel
[1] Display
[2] Reset button
[3] Not used
[4] Not used
[5] ON/OFF and fault indicator (blue)
[6] Central heating temperature control
[7] Performance test button
[8] Service button
[9] Burner indicator (green)
[10] ON/OFF button
1
2
34
5
6
max
reset
eco
6720806548-14.1Wo
10
2
3
4
9
7
8
1
5
6

6
Operating the boiler
GREENSTAR CDi CLASSIC REGULAR – 6 720 812 177 (2014/07)
3.2 SWITCHING THE BOILER ON/OFF
Switching on
▶ Switch on the boiler by pressing the ON/OFF button [10].
The ON/OFF indicator [5] shows blue.
Fig. 2
Switching off
▶ Switch off the boiler by pressing the ON/OFF button.
The ON/OFF indicator light goes out.
1
2
34
5
6
max
reset
eco
6720806549-01.1Wo
5
10
The boiler runs for 15 minutes at minimum heating output to fill the condensate trap. The display alternates
between and the central heating flow temperature.
This occurs every time the mains supply has been interrupted.

7
Operating the boiler
GREENSTAR CDi CLASSIC REGULAR – 6 720 812 177 (2014/07)
3.3 SETTING THE CENTRAL HEATING TEMPERATURE
▶ Turn the central heating temperature control [6] to the
desired level, between approximately 35°C and 90°C.
▶ When the burner is lit, the burner indicator [9] underneath
the ON/OFF button shows green.
Fig. 3
3.3.1 CONTROLLING THE CENTRAL HEATING
Central heating systems must be controlled effectively using a
programmer or timer and a room thermostat.
▶ For further information on how to control your central
heating systemplease refer to the individual user guides for
the programmer or timer installed in your home.
1
2
34
5
6
max
reset
eco
6720806549-02.1Wo
9
6
Position Central heating temperature
1approx. 35°C
2approx. 43°C
3approx. 50°C
4approx. 60°C
5approx. 67°C
6approx. 75°C
max approx. 90°C
Table 2 Settings for the central heating temperature

8
Operating the boiler
GREENSTAR CDi CLASSIC REGULAR – 6 720 812 177 (2014/07)
3.4 FROST PROTECTION (FOR THE BOILER)
Activating frost protection will turn off the boiler and prevent
heating of the central heating.
If the temperature within the boiler drops to 5°C the boiler will
fire to avoid the possibility of freezing.
Fig. 4
To activate frost protection:
▶ Leave power [10] switch on.
▶ Turn the central heating temperature control [6] to .
3.4.1 FROST PROTECTION (FOR THE HEATING SYSTEM)
If remote pipework is likely to be subject to freezing conditions:
▶ Ensure the installer has fitted a frost thermostat in the area
to protect the pipework from freezing.
▶ Ensure the installer has added a suitable anti-freeze fluid to
the water in the central heating system.
1
2
34
5
6
max
reset
eco
6720806549-03.1Wo
10
6

9
Operating the boiler
GREENSTAR CDi CLASSIC REGULAR – 6 720 812 177 (2014/07)
3.5 FAULT CONDITION
In the event of a fault occurring while the boiler is in operation
the reset button and the main fault indicator [5] will flash.
The display [1] will show an error code (for error codes see
table 4 on page 11)
.
Fig. 5
To reset the boiler:
▶ Press the reset button [2] for three seconds.
The reset button [2] and the ON/OFF indicator [5] will stop
flashing.
The boiler will function normally, dependent on
programmer and room thermostat settings.
1
2
34
5
6
max
reset
eco
6720806549-04.1Wo
2
5
1
If the fault cannot be cleared by pressing the
reset button:
▶ Refer to the fault finding section on page
10 of these user instructions.
▶ Call Worcester, Bosch Group, giving a
description of the fault and, if possible,
the fault code from the seven segment
display. Alternatively contact other Gas
Safe registered personnel for
assistance.

10
Maintenance
GREENSTAR CDi CLASSIC REGULAR – 6 720 812 177 (2014/07)
4MAINTENANCE
Your new Greenstar CDi Classic Regular gasfired appliance
represents a long term investment in a reliable, high quality
product.
In order to realise its maximum working life, and to ensure it
continues to operate at peak efficiency and performance, it is
essential that your boiler receives regular servicing and
maintenance checks from a competent person beyond the
initial 2 year guarantee period.
If you would like to know more about a Worcester Bosch service
contract, please tick the appropriate box on your warranty
registration card.
If your Greenstar CDi Classic Regular should fail to operate
correctly or requires servicing please contact the Worcester
Bosch Service Department (see back page cover for details).
Details of the boiler including the Gas Council number can be
found under the controls cover flap on the boiler.
4.1 FAULT FINDING
This table gives information on basic operating system
problems.
Problem Cause Remedy
EA fault code flashing on
display
No gas supply/low gas supply pressure ▶ Contact your gas supplier.
Condensate outlet blocked ▶ If it is safe to do so, check your condensate pipe
outlet for blockages, such as ice or foreign
objects.
Flue blocked ▶ If it is safe to do so, check your flue outlet for
damage or blockages.
Desired room temperature
is not reached
Thermostatic radiator valve(s) set too low ▶ Increase thermostatic radiator valve setting(s)
Temperature control for central heating flow
on boiler set too low
▶ Increase central heating flow temperature control
setting
Air trapped in heating system ▶ Bleed radiators and recharge heating system
Low temperature setting on the boiler
controls
▶ Increase settings on boiler controls
Desired room temperature
too high
Radiators are too hot ▶ Turn down thermostatic radiator valves/room
thermostat
▶Reducecentralheatingtemperature by turning
down the Central Heating control on boiler
Heating stays on too long Clock is incorrectly set ▶ Check setting and adjust
ON/OFF Indicator is not
illuminated
Momentary power failure ▶ Disconnect boiler supply, wait a few seconds then
reconnect.
Table 3 Fault finding