Bosch GREENSTAR HEATSLAVE II EXTERNAL 12/18 User manual

UK
User Instructions and Customer Care Guide
Floor standing oil fired condensing boiler conventional flue and room sealed flue
Greenstar Danesmoor External Regular and
External System 12/18, 18/25, & 25/32
6720809792-00.1Wo
For fully pumped open vent and sealed central heating systems and domestic hot water cylinders
6720809792 (2013/10)

2
Contents
Danesmoor External & External System – 6 720 809 792 (2013/10)
Contents
1 Key to symbols and safety instructions . . . . . . . . . . . 3
1.1 Key to symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 General safety instructions . . . . . . . . . . . . . . . . . . 3
2 Using your boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.2 Operating the boiler . . . . . . . . . . . . . . . . . . . . . . . 5
2.2.1 Switching the boiler on/off . . . . . . . . . . . . . . . . 5
2.2.2 Setting the heating temperature . . . . . . . . . . . . 5
2.2.3 Controlling the central heating . . . . . . . . . . . . . 5
2.2.4 Frost protection . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2.5 Fault conditions . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2.6 Fault finding . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1 Maintaining your boiler . . . . . . . . . . . . . . . . . . . . . 8
3.2 Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4 External filling loop (Sealed system only) . . . . . . . . . 9
5 General information . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.1 Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.2 Boiler installation . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.3 General notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6 Energy saving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6.1 Tips on energy saving . . . . . . . . . . . . . . . . . . . . . 12
7 Guarantee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
7.1 Fault or breakdown . . . . . . . . . . . . . . . . . . . . . . . 13
7.2 Guarantee registration . . . . . . . . . . . . . . . . . . . . 14

3
Key to symbols and safety instructions
Danesmoor External & External System– 6 720 809 792 (2013/10)
1 Key to symbols and safety instructions
1.1 Key to symbols
Warnings
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
Additional symbols
1.2 General safety instructions
These operating instructions are intended for the user of the
heating system.
▶ Read any operating instructions (boiler, heating controls,
etc.) carefully before operation and keep them.
▶ Observe the safety instructions and warnings.
Oil fumes or leaks from the appliance
If you smell oil fumes, observe the following rules.
▶Extinguishanynakedflames
▶ Isolate the electrical supply
▶ Isolate the fuel supply to the boiler
▶ Open windows and doors
▶ Rectify the fault
Health and 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.
Combustion air/room air
The air in the installation room must be free of combustible or
chemically aggressive substances.
▶ Do not use or store combustible or explosive materials
(paper, propellants, thinners, paints, etc.) within the
vicinity of the appliance.
▶ Do not use or store corrosive substances (solvents,
adhesives, chlorinated cleaning agents, etc.) within the
vicinity of the appliance.
Intended use
This boiler must only be used as a heat appliance in a sealed hot
water heating system for domestic purposes.
Any other use is considered inappropriate. Any damage that
results from such use is excluded from liability.
Boiler operation
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.
Servicing
The Service Checklist can be found at the rear of the boiler’s
installation instructions. It will be required in the event of any
guarantee work and may be required by the local Building
Control Inspector.
▶ Have the boiler serviced regularly by a competent, OFTEC
registered engineer.
▶ Ensure that the service engineer completes the Service
Record, at the rear of the Installation, Commissioning and
Servicing Instruction manual, after each service.
Modifications and repairs
Unprofessional modifications to the boiler or other parts of the
heating system can result in injury and/or damage to property
or equipment.
▶ Have any work carried out only by a competent, OFTEC
registered engineer.
▶ Do not remove the boiler case.
▶ Do not modify the boiler or other parts of the heating
system in any way.
Warnings in this document are identified by a
warning triangle printed against a grey
background.
Keywords at the start of a warning indicate the
type and seriousness of the ensuing risk if
measures to prevent the risk are not taken.
This symbol indicates important information
where there is no risk to people or property.
Symbol Explanation
▶ Step in an action sequence
Cross-reference to another part of the document
• List entry
– List entry (second level)

4
Using your boiler
Danesmoor External & External System – 6 720 809 792 (2013/10)
2Usingyourboiler
2.1 Controls
1. Temperature control
2. Pressure gauge (System boiler only)
3. Boiler mode indicator
4. Mode switch
5. Reset button - Heating (behind the front panel)
6. Reset button - Flue thermostat (behind the front panel)
7. Lockout indicator / reset button (located behind the front panel on the burner control box see ‘reset button locations’ below).
flue
reset
boiler
reset
on
service
3
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65
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Using your boiler
Danesmoor External & External System– 6 720 809 792 (2013/10)
2.2 Operating the boiler
2.2.1 Switching the boiler on/off
▶ To switch on the boiler; turn on the water, oil and electricity supply to the boiler.
▶ Check the programmer/timer is correct and 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.
2.2.2 Setting the heating temperature
▶ Turn the control clockwise to increase the water temperature. The demand light will illuminate until the water reaches the set
temperature. Once the set temperature is reached the demand light extinguishes
▶ Turn the control anti-clockwise to reduce the water temperature.
The minimum and maximum ranges of the temperature control positions are approximately 55°C to 81°C.
2.2.3 Controlling the 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.
2.2.4 Frost protection
▶ The appliance has a built-in frost thermostat to protect the internal components.
▶ Frost thermostats can be wired into the boiler.
▶ Frost protection should be fitted to the system where the system is most exposed and at risk of freezing.
flue
reset
boiler
reset
on
service
flue
reset
boiler
reset
on
service
6720809792-03.1Wo
If there is no hot water or heating, check
page 6 and 7 for fault condition guidance.

6
Using your boiler
Danesmoor External & External System – 6 720 809 792 (2013/10)
2.2.5 Fault conditions
The ‘Boiler mode’ and ‘Lockout’ lights can indicate some basic
fault conditions:
1. Accessing controls:
▶ Undo the screws on the bottom of the front panel using the
tool provided. The panel can be removed by pulling out at
the base and then sliding down to disengage from the lid.
2. Normal operation:
Boiler mode light ON
The appliance is in boiler mode, with a demand for heat from
the controls.
3. Both lights ON:
Boiler not firing
▶ Check the level in the oil tank.
▶ Press the Reset button (A). The boiler should fire.
▶ If there is no response, wait 2 minutes and press the Reset
Button (A) again.
▶ If Lockout light stays on, do not attempt further resets.
Contact your Service Engineer for advice.
4. Boiler mode light ON, lockout light OFF:
Boiler not on - No heating/hot water
▶ Press Reset Button (B), press Reset Button (C) both are
below the fascia.
▶ If the boiler remains off, contact your Service Engineer for
advice.
▶ If this fault re-occurs contact your Installer or Service
Engineer.
5. Both lights OFF:
Boiler not on - No heating / hot water
▶ Ensure there is power supply to the boiler.
▶ Check the programmer is set to ON and thermostat is
calling for heat.
▶ Ensure that the Service switch is in Boiler mode.
▶ If there is power supply to the boiler contact your service
engineer for advice.
flue
reset
boiler
reset
on
service
flue
reset
boiler
reset
on
service
flue
reset
boiler
reset
on
service
1. Accessing controls
2. Normal operation
3. Both lights ON
4. Boiler mode light ON, Lockout light OFF
flue
reset
boiler
reset
on
service
5. Both lights OFF
6720809792-04.1Wo

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Using your boiler
Danesmoor External & External System– 6 720 809 792 (2013/10)
2.2.6 Fault finding
Problem Cause Remedy
Desired room temperature is
not reached
Thermostatic radiator valve(s) set too low
Room temperature set too low
Temperature control on the boiler set too low
Air is trapped in the heating system
Increase thermostatic radiator valve setting(s)
Increase room temperature setting
Increase temperature control setting
Bleed radiators and recharge heating system
Desired room temperature
exceeded by large amount
Radiators are too hot Turn down thermostatic radiator valves/room
thermostat/boiler temperature control setting
Temperature rises instead of
falling
Clock/programmer is incorrectly set Check the setting
No Programmer display or
Programmer does not
respond
Momentary power failure Switch off the boiler at the master switch, wait a
few seconds and then switch the boiler on again
Hot water temperature too
low
Hot water temperature set too low
Cylinder is cold
Check the setting of the cylinder thermostat, then
the boiler temperature control setting
Check programmer timings

8
Maintenance
Danesmoor External & External System – 6 720 809 792 (2013/10)
3Maintenance
3.1 Maintaining your boiler
Your new boiler represents a long term investment in a reliable,
high quality product.
In order to realise its maximum working life and to ensure it
continues to operate at peak efficiency and performance, it is
essential thatservicing and maintenance checksare performed
at least once a year by an OFTEC engineer or other suitably
qualified person.
If you would like to know more about servicing options from
Worcester, Bosch Group, please visit worcester-bosch.co.uk.
Please tick the appropriate box on your warranty registration
card for further details of the Worcester, Bosch Group Service
Contract.
When your boiler requires servicing please contact a
Worcester, Bosch Group contact centre (see the back cover for
details).
In addition to the service contract we are pleased to offer a one
-off annual service or breakdown call out for your boiler.
Maintenance tips:
• Regularly check the oil level in the tank
• Do not obstruct the flue outlet or the air inlet
• Regularly check the system pressure gauge, see chapter 4
Use in hard water areas
In exceptionally hard water areas a device to prevent scale
formation may be fitted. Installation of a scale inhibitor
assembly should be in accordance with the requirements of the
local water company.
An isolating valve should be fitted to allow for servicing.
3.2 Servicing
You must have the boiler regularly serviced by a competent,
qualified OFTEC registered engineer using approved spares, to
help maintain the economy, safety and reliability of the boiler.
The boiler should be serviced once each year after installation
unless the installation conditions and usage demand more
frequent services.
Ensure that the service engineer completes
the Service Record in the checklist after each
service.
The completed checklist will be required in the
event of any warranty work and may be
required by the local Building Control
Inspector.
The checklist and service interval record can
be found at the rear of the Installation,
Commissioning and Servicing Instructions.

9
External filling loop (Sealed system only)
Danesmoor External & External System– 6 720 809 792 (2013/10)
4 External filling loop (Sealed system only)
Once the external filling loop has been located, follow the instructions for re-pressurising the system.
1. Ensure that the valve is turned off and unscrew the blanking cap.
2. Attach the hose to the valves, screw on hand-tight.
3. Turn the handle/screwdriver slot through 90° to open the valve.
4. The handle/screwdriver slot will be in-line with the valves.
5. When the pressure reaches between the 1 and 1.5 bar marks (zone A), turn the handle/screwdriver slot back, through 90°, to
close the valve.
6. The handle/screwdriver slot will be at 90° to the valves
7. Remove the hose and replace the blanking caps (a small amount of water will be present in the pipe).
NOTICE: External filling loop
▶ If the filling loop does not look like the one shown in the figure below or you cannot find your filling loop, contact
your installer.
6720643356-12.2Wo
1. 2.
7.
3. 3.
4.4.
5. 5.
6.6.
2
3
1
04
bar
1
A
Min
1 bar
1.5 bar
Max
If the pressure gauge reads more than 1.5 bar as a result of over filling, bleed one radiator until the pressure gauge
returns to between 1 and 1.5 bar.

10
General information
Danesmoor External & External System – 6 720 809 792 (2013/10)
5 General information
5.1 Fuel
This appliance is designed to use 28 second kerosene, no other
fuel must be used.
5.2 Boiler installation
Boiler location
To prevent “wetting” it is recommended that the flue terminal
faces away from walls.
This boiler is only suitable for installing externally at a suitable
location onto a fixed, permanent, rigid surface capable of
supporting the boiler weight. Wood and tarmac hardstandings
are not recommended.
The boiler must be installed on a flat level surface to ensure that
condensate does not enter the primary heat exchanger.
The cabinet is not load bearing, and only provides weather
protection for the boiler inside.
There must be sufficient hard standing and access around the
boiler for servicing.
WARNING:
▶ Externalequipment operatingat230 Volts
must not be serviced or repaired during
adverse weather conditions.
▶ Do not use pressure washers or steam
cleaners on this appliance or cabinet.
WARNING: Boiler installation:
▶ This boiler must not be installed where
here is a potential for excessive ground
water coverage.
▶ Never allow the flue terminal or air inlet to
become obstructed by plants or any other
objects.
600mm
FRONT
2500mm
2500mm
600mm
600mm
50mm
2500mm
600mm
10mm
65mm 45mm
BASE
6720809792-05.1Wo
FRONT
FRONT
PLAN
VIEW
PLAN
VIEW

11
General information
Danesmoor External & External System– 6 720 809 792 (2013/10)
5.3 General notes
To get the best from your boiler, read these instructions
carefully.
Central heating system
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. Repeated venting will reduce the
quantity of water in the system and this must be replenished for
safe and satisfactory operation of the boiler.
When excessive venting or water leaks are found in the system
you must contact a service engineer to inspect the installation
and rectify any fault.
Only use additives compatible with the boiler and system. Use
of incompatible additives can cause damage and will invalidate
the boiler 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 via a pipe to drain.
This pipe must not be blocked or altered in any way.
Clearances, see section 5.2
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.
Room thermostat
A room temperature controller must be fitted to control the
central heating. Refer to 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.

12
Energy saving
Danesmoor External & External System – 6 720 809 792 (2013/10)
6 Energy saving
6.1 Tips on energy saving
Room thermostats
Reducing the setting of the room thermostat by 1°C can reduce
fuel consumption by up to 10%.
New control systems
Upgrade your heating control system with the latest equipment
available. The minimum level of control for a heating system is
a programmer, interlocking room thermostat and thermostatic
radiator valves.
Radiators
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 performance 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 avoided.
It is advisable to manually adjust all radiator valves every 2-3
months to prevent them from sticking. It is also important that
the plastic tops of all valves are always in position and not
cracked or damaged to help prevent accidents. Care should be
taken when vacuum cleaning carpets to avoid damage to valves
and pipework.
The heating system and the outputs of the radiators have been
carefully selected by your installer. The temperature
obtainable in any given room is dependent 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.
Heating economically
The boiler is designed to provide a high level of comfort while
keeping oil consumption and the resulting environmental effect
as low as possible.
The central heating control on the boiler should be set as low as
possible while still maintaining a comfortable room
temperature.
The temperature of each room can be set individually using the
thermostatic radiator valves (except the primary room with the
room thermostat).
Roof insulation
Around 30% of the heat loss from a property is through the
roof. Replace any old insulation with new insulation, preferably
to a minimum thickness of 200mm.
Window frames
Single glazed windows, particularly those with steel frames,
can lose a great deal of heat.
Consideration should be given to replacement with uPVC or
wooden framed double glazed units.
Curtains
Lined curtains, or heavier full length curtains can provide
excellent insulation. However, always ensure that the curtains
do not drape over radiators.
Draughts
Try to ensure that draughts around doors, windows,
letterboxes and keyholes etc., are reduced by using a suitable
draught excluder.

13
Guarantee
Danesmoor External & External System– 6 720 809 792 (2013/10)
7Guarantee
7.1 Fault or breakdown
This boiler is supported in mainland UK by Worcester, Bosch
Group, part of Bosch Thermotechnology Ltd.
Specialist trained, Worcester, Bosch Group Service Engineers
are available to attend in the unlikely event that a breakdown
occurs on this boiler.
No charge will be made for parts and/or labour providing:
▶ A boiler fault is found and the boiler has been installed
within the guarantee period.
Reasonable evidence of this must be supplied on request
If the boiler fails to give complete satisfaction, please
check the following points before calling for a service
engineer:
1. Oil level in the tank
2. Power to the boiler
3. All control settings
A call-out charge will be made where:
▶ The boiler has been installed for longer than the guarantee
period. OR
▶ Our Field Service Engineer finds no fault with the boiler
(see Note). OR
▶ Evidence cannot be provided that the first year service
inspection has been carried out.
(i.e. an entry in the service interval record found at the rear
of the boiler installation and servicing manual). OR
▶ The cause of breakdown is misuse or with other parts of
your plumbing/heating system, or with equipment not
supplied by Bosch Thermotechnology Ltd.
Please read this guide carefully to gain a good understanding of
the operation of your boiler. In the case of a suspected fault,
refer to the fault finding section of this guide.
If in doubt contact our Technical Support
In the event of an boiler 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
circumstances this will be from 1 to 3 working days (excluding
weekends) for priority breakdown situations (no hot water
and/or heating).
Invoices for attendance and repair work carried out on this
boiler by any third party will not be accepted.
Boiler data label
The data label [1] can be found on the inside of the right hand
side panel.
To access first remove the front panel:
▶ Unscrew the two screws on the bottom of the front panel
using the tool provided. The panel will drop down and can
be carefully removed.
To replace front panel:
▶ Push the front panel up behind the top panel, push in and
secure in place with the screws.
(You can record this information on the inside back cover of
this manual.)
NO BOILER FAULT IS FOUND ON
OVER 30% OF ALL SERVICE CALL OUTS.
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14
Guarantee
Danesmoor External & External System – 6 720 809 792 (2013/10)
7.2 Guarantee registration
You should register the boiler within 30 days of installation.
Registering will acknowledge you as the owner of your new
boiler and will assist us in maintaining an effective and efficient
customer service by establishing a reference and permanent
record for your boiler.
This does not affect your statutory rights.
Your guarantee
This boiler is guaranteed against faulty materials or
workmanship for a period of 24 calendar months (60 months
for the primary heat exchanger) from the date of installation
subject to the following conditions:
▶ That during the period of this guarantee any components of
the unit which are proved to be faulty or defective in
manufacture will be exchanged or repaired free of material
charges and free of labour charges if repaired directly by
Bosch Thermotechnology Ltd.
Please be aware that invoices for attendance and repair of
this boiler by third parties will not be accepted forpayment
by Bosch Thermotechnology Ltd.
▶ That the householder may be asked to prove, when
requested, the date of installation, that the boiler was
correctly commissioned and, where appropriate, that the
12 month service inspection has been carried out to the
satisfaction of Bosch Thermotechnology Ltd, when
requested. The boiler must be registered within 30 days of
installation.
▶ That any product or part thereof returned for servicing
under the guarantee must be accompanied by a claim
stating the Model, Serial Number and Date of Installation.
▶ That Bosch Thermotechnology Ltd will not accept
responsibility for damage caused by faulty installation,
neglect, misuse or accidental damage and non-observance
of the instructions contained in the Installation and Users
Instructions leaflets.
▶ That the boiler has been used only for normal domestic
purposes, for which it was designed.
▶ This guarantee applies only to equipment purchased and
installed in mainland UK.
This guarantee is given in addition to all your normal statutory
rights.
Worcester, Bosch Group is a brand name of Bosch
Thermotechnology Ltd.
For you records:
[*] Refer to the boiler data label inside the casing
Model
Serial number*
Type/size
Date of
installation
Installer details

15Danesmoor External & External System– 6 720 809 792 (2013/10)
Notes

WORCESTER, BOSCH GROUP:
TECHNICAL SUPPORT: 0330 123 3366
APPOINTMENTS: 0330 123 9339
SPARES: 0330 123 9779
LITERATURE: 0330 123 9119
TRAINING: 0330 123 0166
SALES: 0330 123 9669
Worcester, Bosch Group
Cotswold Way, Warndon, Worcester WR4 9SW.
Tel. [phone]
Worcester, Bosch Group is a brand name of
Bosch Thermotechnology Ltd.
worcester-bosch.co.uk
6 720 809 792 (2013/10)
If in the unlikely event the boiler does not give complete
satisfaction, before calling for a service engineer, the
installer should check the following:
General checks:
1. Oil level in the tank
2. Power to the boiler
3. All control settings
Please read the fault section of the manual before contacting
our service team.
NOTICE: NO BOILER FAULT IS FOUND ON
OVER 30% OF ALL SERVICE CALL OUTS.