Bosch 25Si User Manual
Greenstar 25Si/30Si
WALL HUNG GAS-FIRED CONDENSING COMBINATION BOILER
FOR SEALED CENTRAL HEATING SYSTEMS & DOMESTIC HOT WATER
USER INSTRUCTIONS &
CUSTOMER CARE GUIDE
THIS BOILER IS USED WITH
NATURAL GAS OR LPG (Cat II 2H3P TYPE C13, C33 & C53)
NATURAL GAS 25 Si GC NUMBER: 47 311 84
30 Si GC NUMBER: 47 311 85
LIQUID PETROLEUM GAS 25 Si GC NUMBER: 47 311 88
30 Si GC NUMBER: 47 311 89
USER INSTRUCTIONS &
CUSTOMER CARE GUIDE
WORCESTER B OSCH GREENSTAR 25Si/30Si
8 716 115 169b (09/2008)
USER INSTRUCTIONS & CUSTOMER
CARE GUIDE
PLEASE READ THESE INSTRUCTIONS
CAREFULLY BEFORE OPERATING
YOUR B O ILER
THESE INSTRUCTIONS ARE
APPLICABLE TO THE WORCESTER,
BOSCH GROUP BOILER MODEL(S)
STATED ON THE FRONT COVER OF THIS
MANUAL ONLY AND MUST NOT BE
USED WITH ANY OTHER MAKE OR
MODEL OF BOILER.
THE INSTRUCTIONS APPLY IN THE UK
ONLY AND SHOULD BE FOLLOWED
EXCEPT FOR ANY STATUTORY
OBLIGATION.
IF YOU ARE IN ANY DOUBT CONTACT
THE WORCESTER, BOSCH GROUP
TECHNICAL SUPPORT.
DISTANCE LEARNING AND TRAINING
COURSES ARE AVAILABLE FROM
WORCESTER, BOSCH GROUP.
THIS BOILER MUST BE INSTALLED BY A
CORGI REGISTERED, COMPETENT
PERSON. FAILURE TO INSTALL
CORRECTLY COULD LEAD TO
PROSECUTION.
PLEASE LEAVE THIS GUIDE, THE
INSTALLATION INSTRUCTIONS AND
THE COMPLETED BENCHMARK
CHECKLIST WITH THE USER.
NOTE: THE BENCHMARK CHECKLIST
AND SERVICE INTERVAL RECORD CAN
BE FOUND AT THE REAR OF THE
INSTALLATION, COMMISSIONING AND
SERVICE INSTRUCTIONS.
ABBREVIATIONS USED IN THIS BOOK:
NG - Natural Gas
LPG - Liquid Petroleum Gas
CH - Central Heating
SEDBUK - Seasonal Efficiency of Domestic
Boilers in the United Kingdom
CONTACT INFORMATION
WORCESTER BOSCH:
TECHNICAL: 08705 266241
SERVICE: 08457 256206
LITERATURE: 01905 752556
SALES: 01905 752640
WEBSITE: www.worcester-bosch.co.uk
CONTENTS
INTRODUCTION
DEDICATED TO HEATING COMFORT 1
SAFETY PRECAUTIONS 2
GENERAL NOTES 3
USING YOUR BOILER
CONTROLS 6
OPERATING THE BOILER 7
Switching the boiler on/off 7
Setting the temperature 7
Controlling central heating 7
Frost protection 7
Controlling the hot water temperature 8
Domestic hot water pre-heat 8
Fault condition 9
MAINTENANCE
MAINTAINING YOUR BOILER 10
FAULT FINDING 11
FAULT OR BREAKDOWN 12
ENERGY SAVING
TIPS ON ENERGY SAVING 13
GUARANTEE
YOUR GUARANTEE 15
GUARANTEE REGISTRATION 16
CONTENTS
WORCESTER BOSCH GREENSTAR 25Si/30Si
8 716 115 169b (09/2008)
1
INTRODUCTION
USING YOUR
BOILER
ENERGY
SAVING
GUARANTEE
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 40 years. This heritage means all 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.
To find out more about Worcester, Bosch Group log onto www.worcester-bosch.co.uk .
MAINTENANCE
EXCELLENCE COMES AS STANDARD
WORCESTER B OSCH GREENSTAR 25Si/30Si
8 716 115 169b (09/2008)
2
INTRODUCTION
IF YOU SMELL GAS!
DO NOT SMOKE OR STRIKE MATCHES
DO NOT TURN ELECTRICAL SWITCHES ON OR OFF
PUT OUT NAKED FLAMES
OPEN DOORS AND WINDOWS
KEEP PEOPLE AWAY FROM THE AREA AFFECTED
TURN OFF THE CONTROL VALVE AT THE METER
CALL YOUR GAS COMPANY
COMBUSTIBLE AND CORROSIVE MATERIALS
Do not store or use any combustible materials (paper, thinners, paints etc.) inside or
within the vicinity of the boiler.
Chemically aggressive substances can corrode the boiler and invalidate any warranty.
FITTING & MODIFICATIONS
Fitting the boiler, any controls to the boiler 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 boiler,
flue or associated components and systems could invalidate the warranty. The
manufacturer accepts no liability arising from any such actions. This does not affect
your statutory rights.
SAFETY PRECAUTIONS
SAFETY PRECAUTIONS
WORCESTER BOSCH GREENSTAR 25Si/30Si
8 716 115 169b (09/2008)
3
INTRODUCTION
SERVICING
The boiler must be serviced regularly by a competent, qualified person, such as a
Worcester service engineer or alternatively a British Gas or other CORGI registered
person.
Always use original spares, to help maintain the economy, safety and reliability of the
boiler and to have the Service Record completed in the Benchmark checklist.
IMPORTANT:- Ensure that the service engineer completes the Service Record in
the Benchmark checklist after each service.
The completed Benchmark checklist will be required in the event of
any warranty work and may be required by the local Building Control
Inspector.
NOTE: The Benchmark checklist and service interval record can be found at
the rear of the Installation, Commissioning and Servicing
Instructions.
BENCHMARK STANDARD
‘Benchmark’ is a code of practice for correctly installing, commissioning and servicing
of domestic water heating boilers.
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 installed and commissioned according to the manufacturer’s
instructions.
HEALTH & SAFETY
The boiler contains no asbestos and no substances used in the construction process
that contravene the COSHH Regulations (Control of Substances Hazardous to Health
Regulations 1988).
GENERAL NOTES
GENERAL NOTES
4
To get the best from your boiler please
read these instructions carefully.
SEALED HEATING SYSTEMS
This boiler is fitted to a sealed heating
system which is pre-pressurised. Your
installer will advise you of the minimum
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-pressurised
and the cause of the fall investigated.
CENTRAL HEATING SYSTEMS
During the first few hours of operation of
the central heating system, check that all
radiators are being heated evenly. 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
replenished for safe and satisfactory
operation of the boiler.
Should water leaks be found in the
system or if excessive venting is required,
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 invalidate
the guarantee.
CONDENSATE DRAIN
This is a condensing boiler and the
terminal will, at times give out a plume of
water vapour. This is quite normal.
The boiler also produces quantities of
condensate which is discharged regularly
by a syphon within the boiler via a pipe to
drain. This pipe must not be blocked or
altered in any way.
CLEARANCES - VENTILATED
COMPARTMENT
Your installer will have provided adequate
space around the boiler for safety and
servicing access. Do not restrict this
space with the addition of cupboards,
shelves etc. next to the boiler.
GENERAL NOTES
ROOM THERMOSTAT
A room temperature controller and
programmer should be fitted to control the
central heating. Refer to the instructions
supplied with the thermostat for
information on siting and setting.
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
accommodation). The remaining radiator,
which must be where the room thermostat
is located, should be un-controlled and
must be left open. The thermostatic
radiator valves should conform to the
requirements of BS2767:10.
INTRODUCTION
*600mm service clearance required to a fixed surface
(**25mm from removable door or panel)
WORCESTER B OSCH GREENSTAR 25Si/30Si
8 716 115 169b (09/2008)
+ 30mm
above elbow
5mm
25mm*
600mm**
5mm
200mm
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