Bosch Appliances GREENSTAR CDI C13 User Manual

GREENSTAR CDi  
WALL HUNG RSF GAS-FIRED CONDENSING  
COMBINATION BOILER  
FOR SEALED CENTRAL HEATING SYSTEMS AND MAINS FED  
DOMESTIC HOT WATER  
THE APPLIANCE IS FOR USE  
WITH NATURAL GAS OR L.P.G.  
(Cat II 2H3P TYPE C13 & C33)  
25CDi GC-Number 47-311-92  
30CDi GC-Number 47-311-93  
35CDi GC-Number 47-311-94  
40CDi GC-Number 47-311-95  
USER INSTRUCTIONS &  
CUSTOMER CARE GUIDE  
CONTENTS  
INTRODUCTION  
EXCELLENCE COMES AS STANDARD  
SAFETY PRECAUTIONS  
GENERAL NOTES  
4
5-7  
8-11  
USING YOUR APPLIANCE  
CONTROLS  
12  
13-15  
13  
13  
13  
OPERATING THE APPLIANCE  
Switching the appliance on/off  
Setting the central heating temperature  
Controlling central heating  
Frost protection  
14  
Controlling domestic hot water  
Fault condition  
14-15  
15  
ENERGY SAVING  
TIPS ON ENERGY SAVING  
16-17  
MAINTENANCE  
MAINTAINING YOUR APPLIANCE  
FAULT FINDING  
18  
19  
FAULT OR BREAKDOWN  
20-21  
GUARANTEE  
YOUR GUARANTEE  
GUARANTEE REGISTRATION  
22  
23  
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WORCESTER BOSCH GREENSTAR 25CDi/30CDi/35CDi/40CDi  
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CONTENTS  
EXCELLENCE COMES AS  
STANDARD  
Thank you for purchasing a Greenstar  
25CDi/30CDi/35CDi/40CDi gas-fired  
condensing combination boiler manu-  
factured by Worcester Bosch. The com-  
pany prides itself on manufacturing boi-  
lers to the strictest quality control stan-  
dards throughout every stage of produc-  
tion. Worcester Bosch has led the field  
in innovative appliance design and per-  
formance for more than 40 years. This  
heritage means all products are of  
exceptional quality and proven reliability.  
The Greenstar range in particular is  
extremely energy efficient, converting up  
to 97% of gas consumed into heat, offe-  
ring you economical running costs and  
value for money. It sits in SEDBUK  
Band A, and is therefore amongst the  
top energy rated appliances available.  
There is also the reassurance of our no-  
nonsense 2 years parts and labour gua-  
rantee - backed up by Worcester Total  
Cover, an optional complete maintenan-  
ce scheme to keep your boiler operating  
at peak condition and efficiency.  
To find out more about Worcester  
bosch.co.uk.  
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WORCESTER BOSCH GREENSTAR 25CDi/30CDi/35CDi/40CDi  
EXCELLENCE COMES  
AS STANDARD  
6 720 611 928a (02/05)  
SAFETY PRECAUTIONS  
IF YOU SMELL GAS:  
BENCHMARK STANDARD  
DON’T SMOKE OR STRIKE  
MATCHES  
‘Benchmark’ is a code of practice for  
correctly installing, commissioning and  
servicing of domestic water heating  
appliances.  
DON’T TURN ELECTRICAL  
SWITCHES ON OR OFF  
A Benchmark Checklist is provided by  
the manufacturer for the installer to  
complete ALL details together with their  
CORGI registration number and sign to  
confirm that the boiler has been instal-  
led and commissioned according to the  
manufacturer’s instructions.  
DO PUT OUT NAKED FLAMES  
DO OPEN DOORS AND  
WINDOWS  
DO KEEP PEOPLE AWAY FROM  
THE AREA AFFECTED  
DO TURN OFF THE CONTROL  
VALVE AT THE METER  
IMPORTANT: The completed  
Benchmark Checklist will be required in  
the event of any warranty work and may  
be required by the local Building  
Control Inspector.  
TELEPHONE YOUR GAS  
COMPANY  
HEALTH & SAFETY  
The appliance contains no asbestos and  
no substances used in the construction  
process that contravene the COSHH  
Regulations (Control of Substances  
Hazardous to Health Regulations 1988).  
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WORCESTER BOSCH GREENSTAR 25CDi/30CDi/35CDi/40CDi  
SAFETY  
6 720 611 928a (02/05)  
PRECAUTIONS  
SAFETY PRECAUTIONS  
COMBUSTIBLE AND CORROSIVE  
MATERIALS  
Do not store or use any combustible  
materials (paper, thinners, paints etc.)  
inside or within the vicinity of the appli-  
ance.  
Chemically aggressive substances, such  
as halogenated hydrocarbons containing  
chlorine or fluorine compounds can cor-  
rode the appliance and invalidate any  
warranty.  
FITTING & MODIFICATIONS  
Fitting the appliance, any controls to the  
appliance and removal of the outer  
casing may only be carried out by a  
competent engineer in accordance with  
the Gas Safety (Installation and Use)  
Regulations.  
Flue systems must not be modified in  
any way other than as described in the  
Installation Instructions and any misuse  
or unauthorised modifications to the  
appliance, flue or associated compo-  
nents and systems could invalidate the  
warranty. The manufacturer accepts no  
liability arising from any such actions.  
This does not affect your statutory rights.  
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WORCESTER BOSCH GREENSTAR 25CDi/30CDi/35CDi/40CDi  
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SAFETY  
PRECAUTIONS  
SAFETY PRECAUTIONS  
SERVICING  
The user is recommended to have the  
system regularly serviced by a compe-  
tent, qualified engineer (such as British  
Gas or CORGI registered personnel)  
using original spares, to help maintain  
the economy, safety and reliability of the  
appliance and to have the Service  
Record completed in the Benchmark  
Checklist.  
The appliance should be serviced annu-  
ally after installation unless the particular  
installation conditions and usage  
demand more frequent services.  
IMPORTANT - ensure that the service  
engineer completes the Service Record  
in the Benchmark Checklist after each  
service.  
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WORCESTER BOSCH GREENSTAR 25CDi/30CDi/35CDi/40CDi  
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SAFETY  
PRECAUTIONS  
GENERAL NOTES  
To get the best from your appliance plea-  
se read these instructions carefully.  
SEALED HEATING SYSTEMS  
This appliance is fitted to a sealed hea-  
ting system which is pre-pressurised.  
Your installer will advise you of the mini-  
mum and maximum pressure which  
should be indicated on the pressure  
gauge.  
Check regularly that the pressure is  
maintained and contact your installer or  
maintenance engineer if a permanent  
significant drop in pressure is indicated  
on the pressure gauge. If the system  
loses pressure it should be re-pressuri-  
sed and the cause of the fall investiga-  
ted.  
CENTRAL HEATING SYSTEMS  
During the first few hours of operation of  
the central heating system, check that all  
radiators are being heated at an even  
rate. If the top of a radiator is at a lower  
temperature than the bottom then it  
should be vented by releasing air  
through the venting screw at the top of  
the radiator. Ask your installer to show  
you how this is done.  
This boiler is fitted to a sealed system;  
repeated venting will reduce the quantity  
of water in the system and this must be  
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WORCESTER BOSCH GREENSTAR 25CDi/30CDi/35CDi/40CDi  
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GENERAL NOTES  
GENERAL NOTES  
replenished for safe and satisfactory  
operation of the appliance.  
Should water leaks be found in the  
system or if excessive venting is requi-  
red, then a service engineer must be  
contacted to inspect the installation and  
rectify any fault.  
Only additives that are compatible with  
aluminium may be used in the system.  
Any incompatible additive used will inva-  
lidate the guarantee.  
CONDENSATE DRAIN  
This is a condensing appliance and the  
terminal will, at times give out a plume of  
water vapour. This is quite normal.  
The appliance also produces quantities  
of condensate which is discharged regu-  
larly by a siphon within the boiler via a  
pipe to drain. This pipe must not be  
blocked or altered in any way.  
+ 30mm  
above elbow  
CLEARANCES - VENTILATED  
COMPARTMENT  
5mm  
Your installer will have provided adequa-  
te space around the appliance for safety  
and servicing access. Do not restrict this  
space with the addition of cupboards,  
shelves etc. next to the appliance.  
5mm  
*600mm  
(**20mm)  
*600 mm service clearance required to a  
fixed surface  
200mm  
(**20 mm from removable door or panel)  
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WORCESTER BOSCH GREENSTAR 25CDi/30CDi/35CDi/40CDi  
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GENERAL NOTES  
GENERAL NOTES  
A
+ 30mm  
above elbow  
BOILER CLEARANCES -  
UNVENTILATED COMPARTMENT  
The diagrams (A and B) opposite show  
two options for the minimum space  
required to install and service the boiler  
inside an unventilated compartment.  
200mm*  
200mm*  
* This space can be reduced to 50 mm  
for one side only as long as both the  
side clearances add up to the total of  
both the side measurements shown or  
more.  
100mm**  
600mm***  
** Space required for unventilated areas  
with a removable door or panel.  
200mm  
*** 600 mm clearance required to a fixed  
surface for servicing.  
ROOM THERMOSTAT  
B
A room temperature controller and pro-  
grammer should be fitted to control the  
central heating. Refer to the instructions  
supplied with the thermostat for informa-  
tion on siting and setting.  
+ 250mm  
above elbow  
100mm*  
THERMOSTATIC RADIATOR VALVES  
It is recommended that this type of valve  
is fitted to all but one of the radiators (or  
at least those in the sleeping accommo-  
dation). The remaining radiator, which  
must be where the room thermostat is  
located, should be uncontrolled and  
must be left open. The thermostatic  
radiator valves should conform to the  
requirements of BS2767:10.  
100mm*  
100mm**  
to removable door  
600mm***  
front clearance  
for service  
300mm  
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WORCESTER BOSCH GREENSTAR 25CDi/30CDi/35CDi/40CDi  
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GENERAL NOTES  
GENERAL NOTES  
VENTILATION  
This is a room sealed appliance and  
does not require any air for combustion  
from inside the property. If the appliance  
is fitted into a cupboard or a compart-  
ment is built around the appliance after  
installation, then the compartment must  
be separated from the boiler space by a  
perforated non-combustible partition as  
described in BS 6798.  
Notwithstanding the requirements of BS  
6798 and BS 5440 there is no need for  
ventilation openings to be provided in  
the compartment because of the low  
heat loss from the appliance casing, if  
the clearances shown are maintained.  
Do not operate the appliance if the flue  
terminal fitted on the outside wall or roof  
is obstructed or damaged.  
PUMP ANTI-SEIZURE  
If there has been no heating demand for  
24 hours the boiler will run the system  
pump for a few seconds to reduce the  
possibility of pump seizure during long  
periods of inactivity, which is usually  
more frequent during the summer  
months.  
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WORCESTER BOSCH GREENSTAR 25CDi/30CDi/35CDi/40CDi  
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GENERAL NOTES  
CONTROLS  
I
J
A
K
E
D
F
H
M
L
5
G
C
min  
6 720 611 928-01.1O  
B
A - MASTER SWITCH FOR ON/OFF  
H - ECO BUTTON (DOMESTIC HOT  
WATER PRE-HEAT ON/OFF)  
B - MAINS ON/OFF INDICATOR +  
FAULT DIAGNOSTIC LIGHT  
I - SYSTEM PRESSURE GAUGE  
C - CENTRAL HEATING TEMPERA-  
TURE CONTROL  
J - POSITION FOR OPTIONAL  
PROGRAMMER  
D - BURNER ON INDICATOR LIGHT  
(GREEN)  
K - DISPLAY  
L - CENTRAL HEATING BOOST  
BUTTON  
E - FAULT RESET BUTTON  
F - SERVICE BUTTON  
M - HOLIDAY BUTTON  
G - DOMESTIC HOT WATER TEMPE-  
RATURE CONTROL  
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WORCESTER BOSCH GREENSTAR 25CDi/30CDi/35CDi/40CDi  
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CONTROLS  
OPERATING THE APPLIANCE  
SWITCHING THE APPLIANCE ON/OFF  
Switching on  
B Switch on the appliance by pressing  
the master switch.  
The indicator light shows blue  
• The boiler runs for 15 minutes at mini-  
mum heating output to fill the conden-  
sate trap, the display (K) alternates bet-  
ween “-II-” and the central heating flow  
temperature. This occurs every time the  
mains supply has been interrupted.  
Switching off  
B Switch off the appliance by pressing  
the master switch.  
The blue indicator light goes out.  
SETTING THE CENTRAL HEATING  
TEMPERATURE  
B Turn the central heating temperature  
control to the desired level, between  
40 °C and 90 °C.  
B When the burner is lit, the green indi-  
cator light underneath the on/off switch  
is illuminated.  
CONTROLLING CENTRAL HEATING  
B Set the timer to the correct time.  
B Set room thermostat to the desired  
room temperature.  
B Set the thermostatic radiator valves to  
the desired settings.  
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OPERATING THE  
APPLIANCE  
OPERATING THE APPLIANCE  
FROST PROTECTION  
B Leave master switch on.  
B Turn the central heating temperature  
control to  
.
If the temperature falls to 5 °C within the  
boiler it will fire to avoid the possibility of  
freezing.  
B Add a suitable anti-freeze fluid to the  
water in the central heating system.  
B If remote pipework is likely to be sub-  
jected to freezing conditions, ensure the  
installer has fitted a frost thermostat in  
the area to protect the pipework.  
CONTROLLING THE HOT WATER  
TEMPERATURE  
B The hot water temperature can be set  
to between approx. 40 °C and 60 °C  
using the temperature control  
.
DOMESTIC HOT WATER PRE-HEAT  
Pre-heat reduces the time taken to pro-  
duce hot water at the tap and is control-  
led by the ECO button.  
B Press the ECO button to select either:  
When the ECO button is not illumina-  
ted the boiler will be in pre-heat mode  
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OPERATING THE  
APPLIANCE  
OPERATING THE APPLIANCE  
(which will reduce the time taken to pro-  
duce hot water at the tap).  
OR  
When the ECO button is illuminated  
the boiler will be in ECO mode with no  
pre-heat available.  
FAULT CONDITION  
In the unlikely event of a fault occurring  
while the appliance is in operation:  
The reset button will flash once per  
second and the mains indicator (blue  
light) will flash also. The display shows a  
fault code.  
B To reset boiler press the reset button.  
The reset button will no longer be illumi-  
nated and the mains indicator will stop  
flashing.  
The boiler will function normally, depen-  
dent on programmer and room thermo-  
stat settings.  
If the fault remains and cannot be clea-  
red by pressing the reset button, or if  
fault persists contact Worcester Bosch  
for assistance, giving a description of the  
fault and, if possible, the fault code from  
the display.  
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WORCESTER BOSCH GREENSTAR 25CDi/30CDi/35CDi/40CDi  
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OPERATING THE  
APPLIANCE  
TIPS ON ENERGY SAVING  
Central heating systems with room  
thermostats/thermostatic radiator  
valves  
Heating economically  
The boiler is designed to provide a high  
level of comfort while keeping gas con-  
sumption and the resulting environmen-  
tal effect as low as possible. The gas  
supply to the burner is controlled accor-  
ding to the level of demand for heat.  
The boiler continues to operate with a  
low flame if the demand for heat redu-  
ces. The technical term for this process  
is modulating control. Modulating con-  
trol reduces temperature fluctuations  
and provides even distribution of heat  
throughout the home. This means that  
the boiler may stay on for relatively long  
periods but will use less gas than an  
appliance that continually switches on  
and off.  
The central heating control on the boiler  
should be set to the maximum rated tem-  
perature of the central heating system.  
The temperature of each room can be  
set individually (except primary room with  
the room thermostat) using the thermo-  
static radiator valves.  
Roof insulation  
Around 30% of the heat loss from a pro-  
perty is through the roof. Replace any  
old insulation with new insulation, prefe-  
rably of around 200 mm thickness or  
more.  
Window frames  
Single glazed windows, particularly  
those with steel frames, can lose a great  
deal of heat. Consideration should be  
given to replacement with PVCu or woo-  
den framed double glazed units.  
Curtains  
Lined curtains, or heavier full length cur-  
tains can provide excellent insulation.  
However, always ensure that the curtains  
do not drape over radiators.  
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WORCESTER BOSCH GREENSTAR 25CDi/30CDi/35CDi/40CDi  
TIPS ON ENERGY  
SAVING  
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TIPS ON ENERGY SAVING  
Draughts  
Radiators  
Try to ensure that draughts around  
doors, windows, letterboxes and keyho-  
les etc. are reduced by using a suitable  
draught excluder. Warning - Do not block  
or seal any air vents that are installed to  
ensure the central heating boiler opera-  
tes safely.  
More often than not radiators will be  
sited underneath a window, so the warm  
air from the radiator heats the colder  
incoming air from the window. The per-  
formance of the radiator will be affected  
if the curtains are allowed to drape over  
the radiator or shelves are fitted above it.  
The positioning of furniture and tables in  
front of the radiator should also be avoi-  
ded.  
Room thermostats  
Reducing the setting of the room ther-  
mostat by 1 °C can reduce fuel con-  
sumption by up to 10%.  
It is advisable to manually adjust all  
radiator thermostatic valves every 2-3  
months to prevent them sticking. It is  
also important that the plastic tops of all  
valves are always in position and not  
cracked or damaged to prevent acci-  
dents. Care should be taken when vacu-  
um cleaning carpets to avoid damage to  
valves and pipework.  
New control systems  
Upgrade your heating control system if  
necessary with the latest equipment  
available. The minimum level of control is  
a programmer, interlocking room thermo-  
stat and thermostatic radiator valves.  
The heating system and the outputs of  
the radiators have been carefully selec-  
ted by your installer. The temperature  
obtainable in any given room is depen-  
dent on all radiators being operated at  
the same time. If you decide to turn off  
radiators in unused rooms, spare  
bedrooms etc., you may experience  
slightly lower room temperatures in  
rooms adjacent to unheated rooms.  
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WORCESTER BOSCH GREENSTAR 25CDi/30CDi/35CDi/40CDi  
TIPS ON ENERGY  
SAVING  
6 720 611 928a (02/05)  
MAINTAINING YOUR  
APPLIANCE  
Your new Greenstar 25CDi/30CDi/  
35CDi/40CDi gas-fired appliance repre-  
sents a long term investment in a reliab-  
le, high quality product.  
In order to realise its maximum working  
life, and to ensure it continues to opera-  
te 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, plea-  
se tick the appropriate box on your war-  
ranty registration card.  
If your Greenstar 25CDi/30CDi/  
35CDi/40CDi should fail to operate cor-  
rectly or requires servicing please con-  
tact the Worcester Bosch Service  
Department (see inside front cover for  
details).  
Details of the boiler including the Gas  
Council number can be found under the  
controls cover flap on the boiler.  
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MAINTAINING  
YOUR APPLIANCE  
FAULT FINDING  
This table gives information on basic  
operating system problems.  
In the unlikely event of a boiler fault  
please read the following page tho-  
roughly before contacting Worcester  
Bosch.  
Problem  
Desired room temperature Thermostatic radiator  
is not reached valve(s) set too low  
Cause  
Remedy  
Increase thermostatic  
radiator valve setting(s)  
Temperature control for CH Increase CH flow tempera-  
flow on boiler set too low ture control setting  
Air trapped in heating  
system  
Bleed radiators and rechar-  
ge heating system  
Desired room temperature Radiators are too hot  
exceeded by large amount  
Turn down thermostatic  
radiator valves / room ther-  
mostat  
Reduce central heating  
temperature on boiler  
Heating stays on for too  
long  
Clock is incorrectly set  
Momentary power failure  
Check setting  
No on/off indicator  
Switch off appliance at  
master switch, wait a few  
seconds then switch on  
again  
Hot water temperature too Temperature set too low  
Check setting  
Check setting  
low  
Programmer setting  
Water flow at tap too high Reduce flow rate at tap  
Hot water temperature too Temperature set too high Check setting  
high  
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WORCESTER BOSCH GREENSTAR 25CDi/30CDi/35CDi/40CDi  
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FAULT FINDING  
FAULT OR BREAKDOWN  
This appliance is supported in the UK  
by Worcester, Bosch Group.  
Specialist factory trained Service  
Engineers are available to attend a  
breakdown occurring on this appliance.  
No charge will be made for parts  
and/or labour providing:  
B An appliance fault is found and the  
appliance has been installed within the  
past 24 months. Reasonable evidence  
of this must be supplied on request. i.e.  
the Benchmark Checklist.  
A call-out charge will be made where:  
B The appliance has been installed for  
over 24 months.  
OR  
B Evidence cannot be provided that the  
first year service inspection has been  
carried out (ie. an entry in the  
Benchmark Checklist).  
OR  
B Our Field Service Engineer finds no  
fault with the appliance (see Note).  
OR  
B The cause of breakdown is misuse or  
with other parts of your plumbing/hea-  
ting system, or with equipment not sup-  
plied by Worcester Bosch.  
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WORCESTER BOSCH GREENSTAR 25CDi/30CDi/35CDi/40CDi  
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FAULT OR  
BREAKDOWN  
FAULT OR BREAKDOWN  
Note:  
NO APPLIANCE FAULT IS FOUND ON  
OVER 30% OF ALL SERVICE CALL  
OUTS.  
Please read this guide carefully to gain a  
good understanding of the operation of  
your appliance. In the case of a suspec-  
ted fault, refer to the fault finding section  
of this guide.  
If in doubt contact our Technical  
Helpline  
In the event of an appliance fault or  
breakdown please contact our Service  
Department. Your service administrator  
will arrange for an engineer to call with  
the minimum of delay; under normal cir-  
cumstances this will be from 1 - 3 wor-  
king days (excluding weekends) for prio-  
rity breakdown situations (no hot water  
and/or heating).  
Invoices for attendance and repair work  
carried out on this appliance by any third  
party will not be accepted.  
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FAULT OR  
BREAKDOWN  
YOUR GUARANTEE  
B The householder may be asked to  
prove the date of installation, that the  
appliance was correctly commissioned  
and, where appropriate, the first year’s  
service has been carried out to the satis-  
faction of BBT Thermotechnology UK  
Ltd. when requested. These should be  
part of the Benchmark Checklist.  
This appliance is guaranteed against  
faulty material or workmanship for a  
period of 2 years from the date of instal-  
lation subject to the following terms and  
conditions.  
B Your Guarantee Registration Card  
must be returned within 30 days for the  
second year of your guarantee to beco-  
me valid.  
B Any product or part returned for servi-  
cing under the guarantee must be  
accompanied by a claim stating the  
model, serial number & date of installa-  
tion.  
B During the period of this guarantee  
any components of the unit which are  
proven to be faulty or defective in manu-  
facture will be exchanged or repaired  
free of charge by BBT  
B BBT Thermotechnology UK Ltd. will  
not accept responsibility for damage  
caused by faulty installation, neglect,  
misuse or accidental damage or the non-  
observance of the instructions contained  
in the Installation and Servicing Manual  
and User Instructions.  
Thermotechnology UK Ltd.  
B The appliance has been used only for  
the normal domestic purposes for which  
it was designed.  
B This guarantee applies only to equip-  
ment purchased and used in the United  
Kingdom.  
This guarantee does not affect your sta-  
tutory rights.  
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WORCESTER BOSCH GREENSTAR 25CDi/30CDi/35CDi/40CDi  
YOUR  
6 720 611 928a (02/05)  
GUARANTEE  
GUARANTEE REGISTRATION  
You should complete and return the  
postpaid Guarantee Registration Card  
within 14 days of purchase.  
Returning the card will register you as  
the owner of your new Greenstar  
25CDi/30CDi/35CDi/40CDi appliance  
and will assist us in maintaining an  
effective and efficient customer service  
by establishing a reference and perma-  
nent record for your boiler.  
This does not affect your statutory  
rights.  
For your own record:  
Model  
Serial No.  
(See guarantee card)  
Type / size  
Date of installation  
Check that the Benchmark Checklist  
has been completed by your installer or  
service engineer.  
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WORCESTER BOSCH GREENSTAR 25CDi/30CDi/35CDi/40CDi  
6 720 611 928a (02/05)  
GUARANTEE  
REGISTRATION  
USER INSTRUCTIONS &  
CUSTOMER CARE GUIDE  
Worcester, Bosch Group  
Cotswold Way, Warndon, Worcester WR4 9SW.  
Tel. 01905 754624 Fax. 01905 754619  
Worcester Bosch Group is a trading name of  
BBT Thermotechnology UK Ltd.  
6 720 611 928a (02/05) OSW  

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