USER INSTRUCTIONS
6720648665-00.1Wo
FLOOR STANDING RSF GAS FIRED CONDENSING COMBINATION BOILER
Greenstar Highflow 440CDi
ErP
& 550CDi
FOR SEALED CENTRAL HEATING SYSTEMS AND MAINS FED DOMESTIC HOT WATER
The appliances are for use with:
Natural Gas or L.P.G. (Cat. II 2H3P type C13, C33 & C53)
Natural Gas:
Highflow 440CDi
Highflow 550CDi
L.P.G.:
Highflow 440CDi
Highflow 550CDi
ErP
, GC number 47-406-89
ErP
, GC number 47-406-91
ErP
, GC number 47-406-90
ErP
, GC number 47-406-92
ErP
6 720 818 076 (2015/12)
UK/IE
Preface
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 and
the Installation, Commissioning and Servicing Instructions
including the completed Benchmark Checklist with the user.
Dedicated to heating comfort
Thank you for purchasing a Greenstar gas-fired condensing
combination 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 more than 50 years. This heritage
means all our products are of exceptional quality and proven
reliability.
The Greenstar range in particular is extremely energy e fficient,
offering you economical running costs and value for money.
It sits in SEDBUK 2005 Band A, scoring highly in SEDBUK
2009, and is therefore among 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.
3 Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1 Switching the boiler ON/OFF . . . . . . . 6
3.1.1 Switching ON . . . . . . . . . . . . . . . . . . . 6
3.2 Setting the central heating
temperature . . . . . . . . . . . . . . . . . . . . 6
3.2.1 Controlling the central heating . . . . . 6
3.3 Frost protection (for the boiler) . . . . 7
3.3.1 Frost protection (for the heating
system) . . . . . . . . . . . . . . . . . . . . . . . 7
3.4 Setting the domestic hot water
temperature . . . . . . . . . . . . . . . . . . . . 7
3.5 ECO indicator . . . . . . . . . . . . . . . . . . . 8
3.6 Fault condition . . . . . . . . . . . . . . . . . . 9
4 System pressure . . . . . . . . . . . . . . . . . . . . . . 10
4.1 Sealed heating systems . . . . . . . . . . 10
4.2 Locating the integral filling link . . . . 10
5 Boiler/compartment clearances . . . . . . . . 11
5.1 Boiler clearances . . . . . . . . . . . . . . . 11
5.2 Airing cupboard clearances . . . . . . . 12
5.3 Vented compartments . . . . . . . . . . . 12
6 Maintaining your Boiler . . . . . . . . . . . . . . . . 13
Contents
1 Symbols and safety precautions . . . . . . . . . 3
1.1 Explanation of symbols . . . . . . . . . . . 3
1.2 Safety precautions . . . . . . . . . . . . . . . 3
2 Product details . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 General information . . . . . . . . . . . . . . 4
2.2 Product data on energy consumption 4
2
7 Fault Finding . . . . . . . . . . . . . . . . . . . . . . . . . 13
7.1 Error codes . . . . . . . . . . . . . . . . . . . . 14
7.2 Extreme cold weather . . . . . . . . . . . 14
8 Fault or breakdown . . . . . . . . . . . . . . . . . . . 15
9 Environment / disposal . . . . . . . . . . . . . . . . 15
10 Tips on energy saving . . . . . . . . . . . . . . . . . 16
11 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
12 Guarantee . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Greenstar Highflow CDi
ErP
– 6 720 818 076 (2015/12)
1 Symbols and safety precautions
1.1 Explanation of symbols
Warning symbols
Safety instructions in this document are
framed and identified by a
warning triangle which is printed on a grey
background.
Signal words indicate the seriousness of the hazard in terms of
the consequences of not following the safety instructions.
• NOTICE indicates possible damage to property or
equipment, but where there is no risk of personal injury.
• CAUTION indicates possible personal injury.
• WARNING indicates possible severe personal injury.
Important information
Notes contain important information in cases
where there is no risk of personal injury or
material losses and are identified by the symbol
shown on the left.
Additional symbols
Symbol Meaning
1. a numbered step in an action sequence
▶ a step in an action sequence
•a list entry
– a list entry (second level)
1.2 Safety precautions
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 or regulator
▶ Open windows and doors
▶ Warn your neighbours and leave the building
▶ Prevent anyone from entering the building.
▶ Move well away from the building: call Emergency Services
▶ LPG boilers: Call the supplier’s number on the side of the
gas tank
Symbols and safety precautions
Boiler Operation
This appliance can be used by children aged
from 8 years and above and persons with
reduced physical, sensory or mental capabilities
or lack of experience and knowledge, if they
have been given supervision or instruction
concerning use of the appliance in a safe way
and understand the hazards involved. Children
shall not play with the appliance. Cleaning and
user maintenance shall not be made by children
without supervision.
Combustible and Corrosive Materials
Chemically aggressive substances can corrode the boiler and
invalidate any guarantee.
• Do not store or use any combustible materials (paper,
thinners, paints, propellants, cleaning agents etc.) inside
the cupboard containing the boiler or within the vicinity of
the appliance.
Fittings and Modifications
Only a competent registered gas engineer, such as a Gas Safe
registered engineer or British gas engineer can remove the
boiler’s inner combustion chamber cover and carry out any
work, in accordance with the Gas Safety (Installation and Use)
Regulations.
• Do not remove the inner combustion chamber cover.
Any misuse or unauthorised modifications to the boiler, flue or
associated accessories and heating system will invalidate the
guarantee.
• Do not modify the boiler or flue system in any way.
Worcester, Bosch Group accepts no liability arising from any
such actions. This does not affect your statutory rights.
Cleaning the boiler case
Use a damp, soft cloth to clean the outer painted metal case of
the boiler, do not use chemicals or abrasive materials.
Greenstar Highflow CDi
ErP
– 6 720 818 076 (2015/12)
3
Product details
2 Product details
2.1 General information
Servicing
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 th e
back of the Installation, Commissioning and
Servicing Instructions.
• The boiler must be serviced annually by a competent,
registered gas engineer, 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/logbook is supplied with every boiler and can be
found at the back of the Installation, Commissioning and
Servicing Instructions. 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 t o climate
change
2.2 Product data on energy consumption
The product data on energy consumption can be found in the
Installation, Servicing and Maintenance manual instructions for
contractors.
4
Greenstar Highflow CDi
ErP
– 6 720 818 076 (2015/12)
3 Controls
▶ To gain access to the controls, pull the flap towards you and swing down.
Controls
1
13
12
11
10
Fig. 1 Basic boiler controls
1
Master switch for ON/OFF 8 Not used
2
Boiler
Controls
Position for optional programmer 9 Hot water temperature control
3
Power ON and fault indicator (blue) 10 Central heating temperature control
4
Boiler display 11 Service Engineer button only
5
System pressure gauge 12 Service Engineer button only
6
Reset button 13 Burner ON indicator light (green)
7
ECO button (Domestic Hot Water pre-heat control)
2
3
4
2
1
3
bar
04
reset
eco
5
6
7
4
3
2
1
5
6
max
4
3
2
1
e
6
maxmin
8
9
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Greenstar Highflow CDi
ErP
– 6 720 818 076 (2015/12)
5
Controls
6720806267-02.1Wo
1
2
3
4
5
6
max
2
3
1
04
bar
reset
eco
1
2
3
4
e
6
maxmin
3
1
1.
1
2
3
4
5
6
max
2
3
1
04
bar
reset
eco
1
2
3
4
e
6
maxmin
13
Min
1
2
3
4
5
6
Max
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40 °C
47 °C
53 °C
61 °C
68 °C
74 °C
80 °C
82 °C
6720806267-03.1Wo
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3.1 Switching the boiler ON/OFF
3.1.1 Switching ON
1. Switch on the boiler by pressing the main power button [1].
The power indicator light shows blue[3].
Fig. 2 Power button
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.
Switching off
▶ Switch off the boiler by pressing the main power button.
The blue power button light goes out.
3.2 Setting the central heating temperature
1. Turn the central heating temperature control [10] to the desired level, between approximately 40 and 82 °C.
When the burner is lit, the green indicator light [13] underneath the on/off switch is illuminated.
Fig. 3 Settings for the central heating temperature (with approximate temperatures)
3.2.1 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 system please refer to the individual user guides for the
programmer or timer installed in your home.
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Greenstar Highflow CDi
ErP
– 6 720 818 076 (2015/12)
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