worcester Greenstar ErP Compact CDI 28, Greenstar ErP Compact CDI 28 LPG, Greenstar ErP Compact CDI 32, Greenstar ErP Compact CDI 32 LPG, Greenstar ErP Compact CDI 36 User guide
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User instructions
6720643358-00.1Wo
Wall hung RSF gas fired condensing combination boiler
Greenstar CDi Compact
ErP
For sealed central heating systems and mains fed domestic hot water
These appliances are for use with:
Natural Gas or L.P.G.
(Cat. II 2H 3P type C13, C33 & C53)
Natural Gas 28CDi Compact
32CDi Compact
36CDi Compact
L.P.G. 28CDi Compact
32CDi Compact
36CDi Compact
If you smell gas:
▶ Well away from the building: call the National Gas
Emergency Service on 0800 111 999.
▶ L.P.G. boilers: Call the supplier’s number on the
side of the gas tank.
Model GC Number
ErP
ErP
ErP
ErP
ErP
ErP
47-406-77
47-406-79
47-406-81
47-406-78
47-406-80
47-406-82
6 720 813 277 (2014/09)
UK/IE
Preface
Preface
Please read these instructions carefully
These instructions are applicable to the Worcester, Bosch
Group appliance 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
combination appliance manufactured by Worcester, Bosch
Group. The company prides itself on manufacturing appliances
to the strictest quality control standards throughout every
stage of production.
Worcester, Bosch group has led the field in innovative
appliance 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 e fficient,
offering you economical running costs and value for money. It is
amongst the top energy rated appliances available.
There is also the reassurance of our parts and labour guarantee
- backed up by Worcester Total Cover, an optional complete
maintenance scheme to keep your appliance operating at peak
condition and efficiency.
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Greenstar CDi Compact
ErP
- 6 720 813 277 (2014/09)
Contents
Contents
1 Key to symbols and safety instructions . . . . . . . . . . . . 4
1.1 Key to symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Safety precautions . . . . . . . . . . . . . . . . . . . . . . . . 4
2 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3 Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.1 Operating the boiler . . . . . . . . . . . . . . . . . . . . . . 8
3.1.1 Boiler display . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1.2 Setting the boiler flow temperature for
the central heating system . . . . . . . . . . . . . . 8
3.1.3 Boiler frost protection . . . . . . . . . . . . . . . . . . . . . 9
3.1.4 Turning the central heating off during
the summer . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.1.5 Setting the flow temperature for
domestic hot water system . . . . . . . . . . . . . . 9
3.1.6 Domestic hot water eco and preheat modes . . . 9
3.1.7 Domestic hot water preheat mode
manual activation (Eco mode off) . . . . . . . . 10
3.1.8 Domestic hot water preheat mode timed
activation, with facia timer or exte rnal timer
connected (eco mode off) . . . . . . . . . . . . . .10
3.1.9 Turn off the Operation/fault diagnostic light
(blue) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4 System Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.1 Sealed heating systems . . . . . . . . . . . . . . . . . . 11
4.2 Using the Worcester integral keyed
filling link . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
9 Tips on energy saving . . . . . . . . . . . . . . . . . . . . . . . . 19
10 Environment / disposal . . . . . . . . . . . . . . . . . . . . . . . 20
11 Your guarantee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
12 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5 Service clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6 Maintaining your appliance . . . . . . . . . . . . . . . . . . . . 14
7 Fault finding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7.1 Boiler alert state . . . . . . . . . . . . . . . . . . . . . . . 16
7.2 Boiler reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
7.3 Extreme cold weather . . . . . . . . . . . . . . . . . . . 17
8 Fault or breakdown . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Greenstar CDi Compact
ErP
- 6 720 813 277 (2014/09)
3
Key to symbols and safety instructions
1
1 Key to symbols and safety instructions
1.1 Key to symbols
Warnings
Safety instructions in this document are
framed and identified by a
warning triangle which is printed on a grey
background.
The following keywords are defined and can be used in this
document:
• NOTICE 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
This symbol indicates important information
where there is no risk to people or property.
Additional symbols
Symbol Meaning
1. a numbered step in an action sequence
▶ a step in an action sequence
a reference to a related part in the document or to
other related documents
a reference number to identify or refer to a part or
item
•a list entry
– a list entry (second level)
Table 1
Examples of additional symbols used
A numbered step in an action sequence
A sequence of numbered steps or actions carried out in a
specific order to complete a task.
1. First action
2. Second action
3. Third action
etc.
A step in an action sequence
A sequence of defined actions or steps carried out in order to
complete a task.
▶Action
▶Next action
▶etc
A reference to a related part in the document or to other
related documents.
To refer the reader to a specific figure/table/section within the
manual.
e.g. figure 1.
A reference number to identify or refer to a part or item.
In a related figure, items or parts identified by a sequential
number.
List entries, first and second levels
• A single component/item
• A component/list, made up of multiple parts/items.
– Sub component or sublist of main component/list.
–etc.
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.
▶ Well away from the building: call the National Gas
Emergency Service on 0800 111 999.
▶ L.P.G. boilers: Call the supplier’s number on the side of the
gas tank.
Appliance 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 the 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.
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Greenstar CDi Compact
ErP
- 6 720 813 277 (2014/09)
General information
Combustible and corrosive materials:
Chemically aggressive substances can corrode the appliance
and invalidate any guarantee.
• Do not store or use any combustible materials (paper,
thinners, paints, propellants, cleaning agents etc.) inside
the cupboard containing the appliance or within the vicinity
of the appliance.
Fittings and modifications:
Only a competent engineer can remove the appliance case an d
carry out any work, in accordance with the Gas Safety
(Installation and Use) Regulations.
• Do not remove the appliance case.
Any misuse or unauthorised modifications to the appliance,
flue or associated accessories and heating system will
invalidate the guarantee.
• Do not modify the appliance 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 appliance case:
Use a damp, soft cloth to clean the outer painted metal case of
the appliance, do not use chemicals or abrasive materials.
2 General information
2.1 Energy efficiency
Energy efficiency information is given in the Installation,
Commissioning and Servicing Instructions supplied with the
appliance.
2.2 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 the rear of the Installation,
Commissioning and Servicing Instructions.
2.3 Benchmark standard
The Benchmark initiative is a
code of practice to encourage
the correct installation,
commissioning and servicing of
domestic central heating
appliances and system
equipment.
A “checklist” is dispatched with every appliance and can be
found towards the back of th e 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 appliance has been installed and commissioned
according to the manufacturer's instructions.
The service record provides space for the recor ding of regular
servicing of the appliance/heating system and this can become
a valuable document when, for example, you wish to sell the
property. The service record 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
2.4 User caution
• It is forbidden for any interference with the appliance other
than those actions allowed in this document.
CAUTION: Incorrect use
▶ Any incorrect use can result in danger to
the householder.
• The appliance 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 appliance 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.
Greenstar CDi Compact
ErP
- 6 720 813 277 (2014/09)
5
Controls
6720643358-02.1Wo
1 3 65 7 8 9 10 11 12 13 1442
3Controls
▶ To gain access to the boiler controls pull the flap down using the curved flap handle.
Fig. 1 Basic boiler controls
Boiler
Controls
1
Service menu/back button 9 Scroll down button
2
Service engineer symbol = boiler is set to maximum
or minimum output for service
3
Eco button
4
Reset button 11 Position for optional programmer
5
Boiler display 12 Hot water temperature control
6
Central heating temperature control 13 Diagnostic port*
7
Scroll up button
8
OK - Select/confirmation button 14 Central heating system pressure gauge
* for Worcester service engineer use only
6
10 The blue light is ON when the boiler is in an
operational mode.
It will also flash to indicate a fault.
Greenstar CDi Compact
ErP
- 6 720 813 277 (2014/09)
Display symbols
°C
°C
°C
°F
H 13
SCREEN DISPLAY
Controls
BRIEF DESCRIPTION EXPLANATION
All possible screen symbols This screen is displayed briefly during boiler start up
and shows all the symbols that could be displayed on
the screen.
°
Numerical display Displays a temperature setting or boiler status code.
Text display Display PreHeat or Eco, or the Alert code
Hot water Displays this symbol during a DHW demand.
Central Heating Displays this symbol during central heating demand.
Service engineer mode Displays during service when the boiler is set to
Alert Displays along with the boiler status code and
Service mode Displays when a qualified service engineer is in the
Burner on The boiler is in operation and the flame is alight.
Centigrade indication Displays next to the temperature reading.
Confirmation This symbol confirms a setting change.
Maintenance codes A code displayed with an H and a number relates to a
maximum or minimum output.
diagnostic code during a fault condition.
service menus.
maintenance issue. This is not a boiler fault but an
indication that something will need attention
concerning the boiler.
The example shown is H13 Service interval reached,
the boiler requires servicing.
Call your installer or Worcester Bosch Group to
organise a service visit.
Greenstar CDi Compact
ErP
- 6 720 813 277 (2014/09)
7
Controls
max
min
2
3
1
04
bar
ok
eco
reset
e
max
min
°C
°F
Eco
1.
6720643358-03.1Wo
°C
°F
Eco
2.
3.
3.1 Operating the boiler
3.1.1 Boiler display
This is typical of the display when the boiler is not supplying a central heating or hot water demand.
The display will not be backlit and the internal temperature of the boiler is displayed.
When heat is demanded and the boiler fires up, the flame symbol will be displayed.
eco
reset
°C
°F
°C
ok
°F
Eco
e
min
max
min
2
1
3
bar
04
max
Eco
6720813275-01.1Wo
3.1.2 Setting the boiler flow temperature for the central heating system
1. Turn the central heating temperature control knob to the desired flow temperatur e between 30 and 82°C, this will be indicated
on the digital display. This is not the room temperature but the flow temperature through the radiators.
The “e” point provides guidance for the maximum temperature setting for optimum energy efficiency.
2. The radiator symbol will be displayed to confirm that the a central heating setting is being changed.
3. The value is displayed during this process, press to exit or after five seconds of inactivity the boiler display will return to
the default screen.
ok
▶ Comfort levels within rooms should be controlled by your thermostatic radiator valves and/or room thermostat.
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Greenstar CDi Compact
ErP
- 6 720 813 277 (2014/09)
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