GREENSTAR HEATSLAVE EXTERNAL
12/18, 18/25, 25/32
EXTERNAL OIL FIRED CONDENSING COMBINATION BOILER
BALANCED FLUE
FOR OPEN VENT AND SEALED CENTRAL HEATING SYSTEMS WITH
DOMESTIC MAINS FED HOT WATER
THE BOILER IS FOR USE WITH
KEROSENE (28 SECOND OIL) ONLY
UK
USER INSTRUCTIONS & CUSTOMER CARE GUIDE
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CONTACT INFORMATION
WORCESTER, BOSCH:
TECHNICAL: 0844 892 3366
SERVICE: 0844 892 3000
SERVICE (EIRE) 01494 0099
LITERATURE: 0844 892 9800
SALES: 01905 752640
WEBSITE: worcester-bosch.co.uk
USER INSTRUCTIONS &
CUSTOMER CARE GUIDE
PLEASE READ THESE
INSTRUCTIONS CAREFULLY BEFORE
OPERATING YOUR BOILER
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
MAINLAND UK ONLY AND SHOULD BE
FOLLOWED EXCEPT FOR ANY
STATUTORY OBLIGATION.
IF YOU ARE IN ANY DOUBT CONTACT
THE WORCESTER, BOSCH GROUP
TECHNICAL SUPPORT.
THIS BOILER MUST BE INSTALLED BY
A OFTEC REGISTERED, COMPETENT
PERSON. FAILURE TO INSTALL
CORRECTLY COULD LEAD TO
PROSECUTION.
PLEASE LEAVE THIS GUIDE, THE
INSTALLATION INSTRUCTIONS AND
THE COMPLETED CHECKLIST WITH
THE USER.
NOTE: A CHECKLIST AND SERVICE
INTERVAL RECORD CAN BE FOUND
AT THE REAR OF THE INSTALLATION,
COMMISSIONING AND SERVICE
INSTRUCTIONS.
ABBREVIATIONS:
SEDBUK Seasonal Efficiency for Domestic
Boilers in the United Kingdom.
OFTEC Oil Firing Technical Association for the
Petroleum Industry.
USER INSTRUCTIONS &
CUSTOMER CARE GUIDE
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CONTENTS
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CONTENTS
INTRODUCTION
DEDICATED TO HEATING COMFORT 1
SAFETY PRECAUTIONS 2
USING YOUR BOILER
CONTROLS 3
OPERATING THE BOILER
Switching the boiler on/off 4
Central heating temperature control 4
Controlling central heating 4
Setting the hot water temperature 5
Frost protection 5
Pressure gauge 6
Filling loop 7
Fault conditions 8
Fault finding 10
MAINTENANCE
LOCATION & CLEARANCES 11
MAINTAINING YOUR BOILER 12
SERVICING 13
GENERAL INFORMATION
GENERAL NOTES 14
ENERGY SAVING
TIPS ON ENERGY SAVING 15
GUARANTEE
FAULT OR BREAKDOWN 16
YOUR GUARANTEE AND REGISTRATION 17
INTRODUCTION
USING YOUR
BOILER
GENERAL
INFOR MATION
ENERGY
SAVING
Dedicated to heating comfort
Thank you for purchasing a Greenstar oil fired condensing boiler from 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 condensing range in particular, is extremely energy efficient, converting more
of the fuel consumed into heat offering you economical running costs and value
for money. It sits in SEBUK band A, at the top of the energy rated boilers
available.
There is also the assurance of our no-nonsense parts and labour guarantee backed up by an optional servicing and maintenance contract to keep your boiler
operating at peak condition and efficiency.
To find out more about Worcester, Bosch Group, log onto
worcester-bosch.co.uk.
MAINTENANCE
GUARANTEE
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SAFETY PRECAUTIONS
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2
INTRODUCTION
SAFETY PRECAUTIONS
OIL FUMES OR LEAKS FROM THE BOILER:
Extinguish any naked flames.
Switch off the boiler electricity supply.
Isolate the fuel supply to the boiler.
Contact installer/service engineer.
IMPORTANT:
This boiler must only be operated by a responsible adult who has been instructed in,
understands and is aware of the boiler’s operating conditions and effects.
HEALTH & SAFETY:
The appliance contains no asbestos and no substances have been used in the construction
process that contravene the COSHH Regulations (Control of Substances Hazardous to Health
Regulations 1988). Where applicable, the CE mark indicates compliance with relative
EU Directives.
COMBUSTIBLE AND CORROSIVE MATERIALS:
Do not store or use any combustible materials (paper, thinners, paints etc.) inside or within the
vicinity of the boiler.
The combustion air must be kept clear of chemically aggressive substances which can corrode
the boiler and invalidate any warranty.
FITTING & MODIFICATIONS:
Fitting the boiler and any controls to the boiler may only be carried out by a competent
engineer in accordance with the relevant Installation Regulations.
Flue systems must not be modified in any way other than as described in the fitting instructions.
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, excluding statutory rights.
This boiler is suitable for use with kerosene only, no other fuel may be used.
DO NOT OPERATE THE APPLIANCE WHEN:
The appliance, flue or system is incorrectly fitted, faulty or damaged.
The flue terminal outlet is obstructed or damaged.
There are fumes, fuel leaks or fuel smells from the fuel supply, appliance or internal flue system.
The system is empty, frozen or unpressurised (sealed systems).
The condensate pipe is blocked or restricted.
The appliance clearances are inadequate.
The air supply is restricted or vents damaged.
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To remove the front panel, undo the screws on each side of the base of the front panel using the tool
provided (see diagram below). The panel can then be removed by pulling out at the base and then sliding
down to disengage from the lid.
A Reset button - lock out*. *The alternative reset is accessed by reaching under the fascia and pressing
the reset button on the control box of the burner (see diagram below).
B Reset button - boiler.
C Reset button - flue thermostat.
D Hot water temperature control.
E Central heating temperature control.
F Lock-out indicator.
G Boiler mode indicator.
H Mode switch, Boiler ON or Service.
I Pressure gauge.
Lockout reset button locations
All Models
Remove front panel to access
Burner Reset Button (A)
Thermostat Reset Buttons
(B and C) are common to all
models.
*Alternative reset location
If the reset button under the control
panel does not reset the burner,
press the alternative Burner Reset
Button (A).
CONTROLS
CONTROLS
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3
USING YOUR
BOILER
NOTE: Only attempt two burner
resets, then call your
service engineer for advice
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D
E
max
max
flue
reset
boiler
reset
GF
lockout
GREENSTAR HEATSLAVE EXTE RNAL
H
on
service
I
C
B
A
OPERATING THE BOILER
SWITCHING THE BOILER ON/OFF:
To switch on the boiler; turn on the water, oil and electricity supply to the boiler.
Check the mode switch is in boiler ON position with the indicator illuminated.
Check the programmer/timer is correct and it is set to ON.
Set the room thermostat to the desired setting.
Open and set thermostatic radiator valves as required.
Turn the boiler water temperature control to the required setting.
To switch off the boiler; turn the programmer/timer to OFF for heating and hot water.
If the boiler is left unused and exposed to freezing conditions; shut off all the mains supplies,
isolate the boiler and drain the system and boiler.
CENTRAL HEATING TEMPERATURE CONTROL
Turn the control clockwise to increase the water temperature to the radiators.
Turn the control anti-clockwise to reduce the water temperature to the radiators.
The minimum and maximum ranges of the heating control positions are approximately 55°C to 80°C.
CONTROLLING CENTRAL HEATING:
Set the programmer/timer to the correct time with the required ON/OFF periods.
Turn the room thermostat to the temperature required.
Set thermostatic radiator valves to the required temperature for each room.
OPERATING THE BOILER
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USING YOUR
BOILER
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max
max
flue
boiler
reset
reset
lockout
GREENSTAR HEATSLAVE EXTERNAL
on
service
max
max
flue
reset
on
service
boiler
reset
lockout
GREENSTAR HEATSLAVE EXTERNAL
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