Worcester 12/18 User manual

INSTRUCTION MANUAL
INSTALLATION COMMISSIONING
& SERVICING
GB
GREENSTAR DANESMOOR WALL MOUNTED
12/18 & 18/25
WALL MOUNTED OIL FIRED CONDENSING BOILER
CONVENTIONAL FLUE & ROOM SEALED FLUE
FOR FULLY PUMPED OPEN VENT OR SEALED CENTRAL HEATING SYSTEMS AND DOMESTIC
HOT WATER CYLINDERS
THE APPLIANCE IS FOR USE WITH KEROSENE (28 SECOND
OIL) ONLY
INSTRUCTION MANUAL
GB
THE APPLIANCE IS FOR USE WITH KEROSENE (28 SECOND
OIL) ONLY

INSTALLATION &
SERVICING INSTRUCTIONS
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR DANESMOOR WALL MOUNTED OIL 12/18-18/25
8 718 681 134a (08.08)
1
SYMBOLS USED IN THIS MANUAL:
Domestic hot water
Central heating
Room thermostat
Frost thermostat
Wait time period
Programmer/timer OFF
INSTALLATION & SERVICING INSTRUCTIONS
IMPORTANT HANDLING INSTRUCTIONS:
It is advised that more than one person is
involved in the transfer of the packaged
appliance from the van to the point of installation.
It is advised that no attempt should be made to
move the packaged appliance without the use of
a suitable truck.
At all times the correct method for handling
heavy objects should be strictly observed.
GENERAL HANDLING GUIDELINES:
• Lift only a manageable weight, or ask for
help.
• When lifting, bend the knees, and keep the
back straight and feet apart.
• Do not lift and twist at the same time.
• Lift and carry items close to the body.
• Wear protective clothing and gloves to
protect from any sharp edges.
Cold water main supply
Electricity supply
Check List
Item Qty
Appliance....................................................................................................................................................................1
Accessories Box (below appliance) Contents:
Flue Adaptor Kit...................................................................................................................................................................1
Accessories Tray (top of appliance) Contents:
Base Panel............................................................................................................................................................................1
Condensate Pipe...............................................................................................................................................................1
Fixings Pack:
Wall bolts.........................................................................................................................................................................6
Burner Service Hook..................................................................................................................................................1
Cable Ties.......................................................................................................................................................................2
Oil Valve Fittings Pack................................................................................................................................................1
Fibre Washer Pack......................................................................................................................................................1
Casing Bolts..................................................................................................................................................................6
Literature Pack:
Greenstar Danesmoor Wall Mounted Installation/Servicing Instructions................................................1
Users Instructions...............................................................................................................................................................1
Warranty Return Envelope..............................................................................................................................................1
Guarantee Registration Card........................................................................................................................................1
PLEASE READ THESE INSTRUCTIONS CAREFULLY BEFORE STARTING INSTALLATION.
THESE INSTRUCTIONS ARE APPLICABLE TO THE WORCESTER APPLIANCE MODEL(S)
STATED ON THE FRONT COVER OF THIS MANUAL ONLY AND MUST NOT BE USED WITH
ANY OTHER MAKE OR MODEL OF APPLIANCE.
THE INSTRUCTIONS APPLY IN THE UK ONLY AND MUST BE FOLLOWED EXCEPT FOR ANY
STATUTORY OBLIGATION.
THIS APPLIANCE MUST BE INSTALLED BY A COMPETENT PERSON. FAILURE TO INSTALL
CORRECTLY COULD LEAD TO PROSECUTION.
COMPLYING WITH THE BUILDING REGULATIONS:
This heating appliance forms part of the controlled services for the building. It is law that all controlled
services for buildings must comply with building regulations. You must be able to satisfy your Local
Authority Building Control Body (LABC) that the work carried out concerning the installation and
commissioning of this heating appliance has been carried out to a satisfactory standard.
OFTEC operate a competent persons scheme and registered installers are able to certify that their
work complies with building regulations. Under the scheme;
OFTEC must be informed about every installation.
OFTEC will issue a building regulations compliance certificate to the householder and will
notify the LABC.
OFTEC provide controlled document forms CD10 and CD11 for use during installation and
commissioning respectively.
Other organisations operate self-certification schemes e.g. NAPIT and BESCA Ltd. and it may be
possible for installers who are members of these organisations to self certify their work.
Alternatively you must submit a building control notice to the LABC before installing any boiler. The
LABC will then arrange regular inspection visits during the work to ensure that the installation
complies with the regulations.
IF YOU ARE IN ANY DOUBT CONTACT THE WORCESTER TECHNICAL HELPLINE.
DISTANCE LEARNING AND TRAINING COURSES ARE AVAILABLE FROM WORCESTER.
PLEASE LEAVE THESE INSTRUCTIONS, THE COMPLETED COMMISSIONING FORM AND
THE USER MANUAL WITH THE OWNER OR WITH THE APPLIANCE AFTER INSTALLATION
OR SERVICING. THE SERVICE INTERVAL RECORD CAN BE FOUND ON THE BACK PAGE
OF THIS MANUAL.
ABBREVIATIONS USED IN THIS MANUAL:
Ø Diameter
CH Central Heating
DHW Domestic Hot Water
TRV Thermostatic Radiator Valve
IP Ingress Protection
CF Conventional flue
BF Balanced flue
STORE THE APPLIANCE IN A DRY AREA PRIOR TO INSTALLATION.
N/A Not allowed
SEDBUK Seasonal Efficiency of Domestic Boilers
in the United Kingdom
OFTEC Oil Firing Technical Association for the
Petroleum Industry
IEE Institute of Electrical Engineers
LABC Local Authority Building Control Body

SAFETY & REGULATIONS
IMPORTANT INFORMATION AND SYMBOLS 1
SAFETY PRECAUTIONS AND INSTALLATION REGULATIONS 3
APPLIANCE INFORMATION
GENERAL INFORMATION 4
TECHNICAL DATA 5
LAYOUT & COMPONENTS 6
CLEANING PRIMARY SYSTEMS 7
MAINS SUPPLY 8
OIL SUPPLY 9
WATER SYSTEMS & PIPEWORK 10-11
CONDENSATE PIPEWORK 12
PRESSURE RELIEF PIPEWORK 13
BOILER LOCATION & CLEARANCES 14-15
FLUE TERMINAL POSITIONS 16
CONVENTIONAL FLUE 17
ROOM SEALED FLUE OPTIONS 18
INSTALLATION
UNPACKING THE BOILER 19-22
PIPEWORK POSITIONS & FLUE OPENING 23
BOILER INSTALLATION 24
COMBUSTION CHAMBER 25
CONDENSATE TRAP 26
OIL BURNER & PUMP 27
REFITTING COMPONENTS 28-29
ELECTRICS 30-35
COMMISSIONING
PRE-COMMISSIONING CHECKS - APPLIANCE 36
FILLING THE SYSTEM 37
STARTING THE APPLIANCE 38-40
WATER TREATMENT 41
FINISHING COMMISSIONING - APPLIANCE 42
SERVICING & SPARES
INSPECTION AND SERVICE 43-45
BAFFLE ARRANGEMENT 12/18 46
BAFFLE ARRANGEMENT 18/25 47
INSPECTION AND SERVICE - CONCLUDED 48
SHORT PARTS LIST 12/18 49
SHORT PARTS LIST 18/25 50
FAULT FINDING & DIAGNOSIS
FAULT FINDING - BURNER FUNCTION 51
FAULT FINDING - HEATING & HOT WATER 52
FAULT FINDING - BOILER FUNCTION 53
DIAGNOSTICS FOR MO535 RDB CONTROL BOX 54
MO535 RDB CONTROL BOX OPERATION 55
COMBUSTION RECORD 56
SERVICE INTERVAL RECORD 57
CONTENTS
CONTENTS
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR DANESMOOR WALL MOUNTED OIL 12/18-18/25
8 718 681 134a (08.08)
2
SAFETY &
REGULATIONS
APPLIANCE
INFORMATION
PRE -
INSTALLATION
INSTALLATIONCOMMISSIONING
SERVICING
& SPARES
FAULT FINDING
& DIAGRAMS
NOTES

SAFETY PRECAUTIONS
& INSTALLATION REGULATIONS
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR DANESMOOR WALL MOUNTED OIL 12/18-18/25
8 718 681 134a (08.08)
3
SAFETY &
REGULATIONS
SAFETY PRECAUTIONS INSTALLATION REGULATIONS
OIL SMELLS, LEAKS OR FUMES FROM THE APPLIANCE:
 Extinguish any naked flames.
 Open windows and doors.
 Isolate the electrical supply.
 Isolate the fuel supply to the boiler.
 Rectify fault.
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 appliance.
The combustion air must be kept clear of chemically aggressive substances which can corrode
the appliance and invalidate any warranty.
FITTING & MODIFICATIONS:
Fitting the appliance and any controls to the appliance may only be carried out by a competent
engineer in accordance with these instructions and 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 appliance, flue or associated components and
systems could invalidate the warranty. The manufacturer accepts no liability arising from any
such actions, excluding statutory rights.
SERVICING:
Advise the user to have the system regularly serviced by a competent, qualified engineer (such
as OFTEC registered personnel) using approved spares, to help maintain the economy, safety
and reliability of the appliance.
Failure to install appliances correctly could lead to
prosecution.
The appliance should be installed by a competent
person. The person installing the appliance should
be aware of the Health and Safety at Work Act and
take appropriate action to ensure that the
regulations are adhered to. In order to give
optimum efficiency and trouble free operation the
appliance must be commissioned by a qualified
OFTEC engineer.
The compliance with a British Standard does not,
in itself, confer immunity from legal obligations. In
particular the installation of this appliance must be
in accordance with the relevant requirements of the
following British Standards and regulations in
respect of the safe installation of equipment:
BS 5410: part 1: Code of practice for Oil Fired
Boilers.
BS 799: part 5: Specification for Oil Storage
Tanks.
BS 7593: Code of Practice for treatment of water
in domestic hot water central heating systems.
BS 5449: part 1: Specification for forced
circulation hot water central heating for domestic
premises.
BS 5955: part 8: Specification for the installation
of thermoplastic pipes and associated fittings for
use in domestic hot and cold water services and
heating systems.
BS 7291: Thermoplastic pipes and associated
fittings for hot and cold water for domestic
purposes and heating installations in buildings.
BS 7074: part 1: Application, selection and
installation of expansion vessels and ancillary
equipment for sealed water systems.
BS 7671: IEE Wiring Regulations, current edition.
BS 1362: Specification for general purpose fuse
links for domestic and similar purposes.
The Building Regulations Part J and L1 England
and Wales; Part F and Part J Section III Scotland;
Part L and Part F Northern Ireland.
Local water company bye-laws.
The Control of Pollution (Oil) Regulations.
OFTEC Standards.
Where no specific instruction is given, reference
should be made to the relevant codes of practice.

GENERAL INFORMATION
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR DANESMOOR WALL MOUNTED OIL 12/18-18/25
8 718 681 134a (08.08)
4
APPLIANCE
INFORMATION
GENERAL INFORMATION
STANDARD PACKAGE:
A - Wall mounted oil fired condensing boiler.
B - Accessories tray.
C - Flue adaptor
880mm
380mm
A
600mm
410mm
Check List
Item Qty
Appliance....................................................................................................................................................................1
Accessories Box (below appliance) Contents:
Flue Adaptor Kit...................................................................................................................................................................1
Accessories Tray (top of appliance) Contents:
Base Panel............................................................................................................................................................................1
Condensate Pipe...............................................................................................................................................................1
Fixings Pack:
Wall bolts.........................................................................................................................................................................6
Burner Service Hook..................................................................................................................................................1
Cable Ties.......................................................................................................................................................................2
Oil Valve Fittings Pack.............................................................................................................................................. 1
Fibre Washer Pack......................................................................................................................................................1
Casing Bolts..................................................................................................................................................................6
Literature Pack:
Greenstar Danesmoor Wall Mounted Installation/Servicing Instructions................................................1
Users Instructions...............................................................................................................................................................1
Warranty Return Envelope..............................................................................................................................................1
Guarantee Registration Card........................................................................................................................................1
30mm
B
C

TECHNICAL DATA INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR DANESMOOR WALL MOUNTED OIL 12/18-18/25
8 718 681 134a (08.08)
5
TECHNICAL DATA
Central Heating
Primary water capacity (total) litres
Maximum static head metres
Minimum static head metres
Water side resistance (20°C difference) mbar
Max. permissible sealed system operating pressure bar
in accordance with WRAS guidelines
Flue
Exit flue gas mass flow kg/hr
Pipework connections
Fuel line (compression) mm
Flow mm
Return mm
Primary drain
Condensate (polypropylene) mm
Electrical
Electrical power supply voltage AC...V
Frequency Hz
Max. power consumption W
Thermostats
Boiler flow temperature range (cut in/cut out) °C
Control thermostat differential °C
Boiler high limit thermostat set point °C
Boiler manual reset overheat thermostat set point °C
Flue manual reset overheat thermostat set point °C
General Data
SEDBUK (Band A) %
Appliance protection rating (with fascia programmer) IP
Appliance protection rating (with programmer blanking plate) IP
Appliance weight (dry) kg
Lift weight kg
Emissions class for NOx and CO class
Typical NOx emission figures mg/kWhr
DESCRIPTION UNITS 12/18 18/25
APPLIANCE
INFORMATION
23
30
1
30
2.5
29
10
22
22
21.5
230
50
150
55/81
5
95
105
110
92.6
20
20
108.5
72
1
160
23
30
1
69
2.5
40
10
22
22
21.5
230
50
160
55/81
5
95
105
110
92.8
20
20
108.5
72
1
160
12mm hose connection

LAYOUT &
COMPONENTS
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR DANESMOOR WALL MOUNTED OIL 12/18-18/25
8 718 681 134a (08.08)
6
APPLIANCE
INFORMATION
123
4
5
6
8
9
10
11
12
13
14
16
18
15
19
20
21
17
24
25
27
28
29
30
31
26
32
33
34
37
36
38
39
22
4.1
4.2
35
7
23
LAYOUT & COMPONENTS
The diagram opposite excludes the front
casing panel, bottom panel and air hose.
1. BAFFLE RETAINER ACCESS DOOR
2. SECONDARY HEAT EXCHANGER
BLEED POINTS
3. SECONDARY HEAT EXCHANGER
4. FLUE ADAPTOR
4.1 FLUE GAS SAMPLING POINT
4. 2 COMBUSTION AIR SAMPLE POINT
5. AIR INLET CASING (FLEXIBLE AIR
DUCT CONNECTING TO AIR INTAKE
ON BURNER (18)
6. FLUE OVERHEAT THERMOSTAT
PHIAL
7. WALL MOUNTING FRAME
8. FLUE MANIFOLD ACCESS COVER
9. CONTROL AND MANUAL RESET
OVERHEAT THERMOSTAT PHIAL
10. AUTO-RESET HIGH LIMIT
11. HEAT EXCHANGER PIPE
12. CONDENSATE OUTLET
13. SECONDARY HEAT EXCHANGER
DRAIN POINT
14. RETURN PIPE
15. FLOW PIPE
16. CONDENSATE TRAP
17. DRIP TRAY
18. BURNER AIR INTAKE (CONNECTED
BY FLEXIBLE DUCT TO AIR INLET
CASING (6)
19. RIELLO RDB BURNER
20. LOCKOUT RESET BUTTON/INDICATOR
(ON FRONT OF BURNER CONTROL
BOX)
21. BURNER AIR SETTING ADJUSTER
22. BURNER CONTROL BOX
23. BURNER MOTOR
24. BURNER OIL PUMP
25. OIL SUPPLY ISOLATING VALVE
(UNDER HEAT EXCHANGER)
26. CONTROL BOX ASSEMBLY
27. BOILER OVERHEAT RESET BUTTON
28. FLUE OVERHEAT RESET BUTTON
29. OPTIONAL FASCIA MOUNTED
PROGRAMMER POSITION
30. POWER INDICATOR
31. TEMPERATURE CONTROL KNOB
32. LOCKOUT RESET BUTTON
33. LOCKOUT INDICATOR
34. POWER SWITCH
35. PRIMARY HEAT EXCHANGER DRAIN
(LOCATED UNDER HEAT EXCHANGER)
35. PRIMARY HEAT EXCHANGER
37. BURNER SERVICE SUPPORT
38. PRIMARY HEAT EXCHANGER BLEED
POINT
39. BOILER LIFTING HANDLE

CLEANING PRIMARY SYSTEMS
BEFORE CLEANING THE SYSTEM:
ENSURE THE SYSTEM AND PIPEWORK IS
IN GOOD WORKING ORDER.
FLUSH THE EXISTING SYSTEM WITH A
POWER FLUSHING MACHINE OR WITH A
CHEMICAL CLEANER BEFORE
INSTALLING NEW COMPONENTS.
CLEANING THE PRIMARY SYSTEM:
Cleanse the system in accordance with
BS 7593.
Fill the system with cold mains water to the
recommended pressure and check for leaks.
Open all drain cocks and drain the system.
Close drain cocks and add a suitable flushing
agent at the correct strength for the system
condition in accordance with the manufacturer's
instructions.
Circulate the flushing agent before the boiler
is fired up.
Run the boiler and system at normal operating
temperature in accordance with the
manufacturer's instructions.
Drain and thoroughly flush the system to
remove the flushing agent and any debris.
IMPORTANT: All the following Pre-Installation sections must be read and
requirements met before starting boiler or flue installation.
CAUTION: ISOLATE THE MAINS SUPPLIES BEFORE STARTING ANY WORK AND
OBSERVE ALL RELEVANT SAFETY PRECAUTIONS.
IMPORTANT: Debris from the system can
damage the boiler and reduce efficiency.
Failure to comply with the guidelines for
the use of water treatment with the
appliance will invalidate the appliance
warranty.
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR DANESMOOR WALL MOUNTED OIL 12/18-18/25
8 718 681 134a (08.08)
7
PRE -
INSTALLATION
CLEANING
PRIMARY SYSTEMS

MAINS SUPPLY
ELECTRIC SUPPLY:
• Supply: 230V - 50Hz.
• Cable: PVC insulated 0.75mm2(24 x
0.2mm) temperature rated to 90°C.
• Protection IP20.
• External 5A fuse to BS1362.
• The appliance must be earthed.
• Please refer to IEE regulations for cross
bonding requirements.
• It must be possible to isolate the appliance
from the electric supply with at least a 3mm
contact separation in both poles supplying
the appliance.
• Wiring between the appliance and the
electrical supply must comply with IEE wiring
regulations and any local regulations which
may apply for fixed wiring to a stationary
appliance.
• Any system connected to the boiler must not
have a separate electrical supply.
MAINS SUPPLY
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR DANESMOOR WALL MOUNTED OIL 12/18-18/25
8 718 681 134a (08.08)
8
PRE -
INSTALLATION

OIL SUPPLY
OIL SUPPLY :
•This appliance is suitable for kerosene (28
second oil) only, no other fuel must be used.
• Plastic or steel tanks should be installed to
BS 5410. A steel tank should conform to
BS 799: part 5 and have a slope of 1 in 24
away from the outlet valve with a sludge cock
at its lower end.
• Do not use galvanised steel tanks or
pipework for the oil supply system.
• Do not use soldered joints on the oil
supply pipework.
a) Single pipe gravity feed system:
The oil storage tank (A) must be positioned so
that the oil level does not exceed 4 metres above
the level of the burner oil pump (J) and in addi-
tion the oil level must be at least 300mm above
the oil pump (J). Where the maximum oil level in
the oil storage tank exceeds 4 metres, a head
breaking device must be installed between the
tank (A) and the burner oil pump (J).
b) Double pipe sub-gravity feed system:
Maximum suction height 3.5 metres. Non-return
valves must be fitted to the inlet and return oil line
between the oil pump (J) and oil storage tank (A).
c) Single pipe suction lift with de-aerator
Maximum suction height 3.5 metres. The oil
tank (A) must be positioned below the oil pump
(J). Create an inlet and return loop between the
de-aerator (M) and oil pump (J).
A non-return valve must be incorporated within
the de-aerator or fitted to the oil line between
the oil storage tank (A) and the de-aerator (M).
A top feed oil tank fitted with a de-aerator
using an internal non-return valve should have
any non-return valves fitted in the base of the
tank to the suction line removed to assist
purging air from the oil line.
Pipework
Use copper pipe of the correct diameter
according to the information shown opposite.
Use flexible hoses to connect to the oil pump (J).
Lay the oil supply pipe (H) as straight and
level as possible to avoid air pockets and
unnecessary friction losses. Route away
from the boiler access door or other hot
surfaces.
Install a manual isolating valve (B) to the oil
supply pipe (H), as close to the oil storage
tank (A) as possible.
Fit an oil strainer and water seperator (C) to
the oil supply pipe, near the oil storage tank.
Fit an additional oil filter (N, 16µmmax
filtration size) close to the boiler, but not
inside the boiler casing.
Fit a fire valve in accordance with BS 5410.
The fire valve (D) should be fitted externally
to the building with the fire valve sensor (F)
located within the appliance case.
A fire valve with a shut off temperature of
85°C or higher is recommended to avoid
the possibility of nuisance shut offs.
A capillary type valve provides a neat and
simple installation. Alternatively, a fusible
link or electrical system may be used.
Under no circumstances should a
combination isolating/fire valve be used
as the sole fire protection device.
AF
BN GJ
4m max.
K
a)
H
300mm min.
B DB C
MAXIMUM PIPE RUN FOR SINGLE PIPE GRAVITY FEED SYSTEM
B
A
DB
C
E
K
3.5m max.
L
L
b)
H
FG
B
150mm
MAXIMUM PIPE RUN FOR DOUBLE PIPE SUB-GRAVITY FEED SYSTEM
NJ
B
A
M
B
F
C
G
J
3.5m max.
E
D
c)
MAXIMUM PIPE RUN FOR SINGLE PIPE SUCTION LIFT WITH DE-AERATOR
H
FUEL FLOW RATE FUEL FLOW RATE
K
E
A - Oil storage tank.
B - Isolating valve.
C - Oil strainer & water seperator.
D - Fire valve to BS 5410.
E - External wall.
F - Fire valve sensor.
G - Oil burner.
H - Oil supply pipe.
J - Oil pump.
K - Full base (plastic tanks).
L - Non-return valve.
M - De-aerator.
N - Oil filter (16µmmax filtration size)
NOTE: All dimensions are in metres unless stated otherwise.
The maximum pipe run figures are based on using copper pipe with an inside diameter of
2mm less than the Ø.
HEAD 10mmØ 12mmØ
0.5 12 30
1.0 25 69
1.5 37 91
2.0 49 100
HEAD 10mmØ 12mmØ
2.5 62 100
3.0 74 100
3.5 87 100
4.0 99 100
HEAD 10mmØ 12mmØ
050 100
0.5 44 100
1.0 38 95
1.5 32 80
HEAD 10mmØ 12mmØ
2.0 26 66
2.5 20 50
3.0 14 37
3.5 8 22
HEAD 2.5kg/h 5kg/h 10kg/h 10kg/h
8mmØ 8mmØ 8mmØ 10mmØ
0 100 55 26 100
0.5 95 4523100
1.0 80 40 20 90
1.5 70 35 17 75
HEAD 2.5kg/h 5kg/h 10kg/h 10kg/h
8mmØ 8mmØ 8mmØ 10mmØ
2.0 60 30 14 65
2.5 45 25 11 50
3.0 35 15 8 35
3.5 25 10 5 20
The table and illustration above is a guide only and does not in any way override the de-
aerator manufacturers instructions.
OIL SUPPLY INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR DANESMOOR WALL MOUNTED OIL 12/18-18/25
8 718 681 134a (08.08)
9
PRE -
INSTALLATION

R
TYPICAL OPEN VENT SYSTEM:
A - Appliance.
B - Expansion vessel.
C - Automatic bypass valve.
D - Drain cock.
E - Feed and expansion cistern.
F - Feed and expansion
15mmØ min.
G - Pressure gauge.
H - Open vent 22mmØ min.
J - Circulating pump.
K - Zone valve.
L - Lockshield valve.
M - Hot water cylinder.
N - Automatic air vent.
P - Pressure relief
discharge.
R - Radiators.
S - Static head.
T - Thermostatic radiator
valve (TRV).
U - To filling system.
E
1000mm min.
FH
A
R R
R R
D
C
TLTL
TL LL
JK
M
150mm max.
K
TYPICAL SEALED SYSTEM:
A
D
R R
R
B
P
D
C
TLTL
TL LL
G
JK
M
N
D
U
S
WATER SYSTEMS & PIPEWORK
PRIMARY SYSTEM PLASTIC PIPEWORK:
• Any plastic pipework used must have a
polymeric barrier, comply with BS 7921and
be installed to BS 5955 with 1000mm
(minimum) length of copper or steel pipe
connected to the boiler.
• Plastic pipework used for underfloor heating
must be correctly controlled with a
thermostatic blending valve limiting the
temperature of the circuits to approx. 50°C
with 1000mm (minimum) length of copper or
steel pipe connected to the boiler.
PRIMARY SYSTEM/CONNECTIONS/VALVES:
•Do not use galvanised pipes or radiators.
• All system connections, taps and mixing
valves must be capable of sustaining a
pressure of 3 bar.
• Radiator valves should conform to
BS 2767:10.
• All other valves should conform to BS 1010.
• On new installations TRVs must be used on
all radiators except the radiator where the
room thermostat is sited, this must be fitted
with lockshield valves and left open. All
installations should have TRVs fitted to
radiators within the sleeping accommodation.
• An automatic bypass valve must be connected
between the heating flow and return where
TRVs are used on all radiators, fitted to give
at least a 3 metre circuit when activated.
• Drain cocks are required at all the lowest
points on the system.
• Air vents are required at all high points on the
system.
OPEN VENT PRIMARY SYSTEM:
• The open vent pipe (H) and feed and
expansion pipe (F) must rise continuously
from the appliance.
• The feed and expansion cistern (E) must be
positioned to provide a static head (S) of at
least 1 metre above the highest point in the
heating system to the water level in the feed
and expansion cistern (E). If the appliance is
the highest point of the system 1 metre should
be above the highest point of the appliance.
• Ensure adequate space is left in the expansion
cistern for expansion of the system water.
• No valve shall be fitted in the open vent pipe
(H) or the feed and expansion pipe (F).
• The open vent pipe (H) must be at least
22mmØ.
FULLY PUMPED SEALED PRIMARY SYSTEM:
• A pressure relief valve (P), spring loaded
safety valve set to operate at 3bar, must be
fitted to the heating flow pipe as close as
possible to the boiler.
• An expansion vessel (B) must be fitted to the
heating return pipe as close as possible to
the boiler and pressurised for the system
volume according to the instructions supplied
with the vessel.
• A pressure gauge (G), 3 bar minimum, must
be fitted to the heating flow pipe.
• An automatic air vent (N) must be fitted.
IMPORTANT: The boiler should not be
allowed to operate with a return
temperature of less than 40°C when the
system is up to operating temperature.
WATER SYSTEMS &
PIPEWORK
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR DANESMOOR WALL MOUNTED OIL 12/18-18/25
8 718 681 134a (08.08)
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PRE -
INSTALLATION

WATER SYSTEMS & PIPEWORK
FILLING PRIMARY SEALED SYSTEMS:
• Filling the system must comply with one of
the methods shown opposite.
• The filling point must be at low level and must
never be a permanent direct fixing to the
mains water supply.
• Filling loops must be WRAS approved.
Heating return
Hose
return
Non return
valve Non return valve
Test cock
Stop
cock
Water main
supply
Stop
cock
Temporary hose
Heating return Auto air
vent Non return
valve
Stop
cock
Make up
vessel
1000mm above
the highest point
of the system
Fill Point
INSTALLATION
COMMISSIONING
WATER SYSTEMS &
PIPEWORK
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR DANESMOOR WALL MOUNTED OIL 12/18-18/25
8 718 681 134a (08.08)
11
PRE -
INSTALLATION

CONDENSATE PIPEWORK
CONDENSATE PIPEWORK:
• All national and, where appropriate, local
regulations for the discharge and neutralisation
of condensate should be followed.
• The condensate pipe must be a minimum of
21.5mmØ polypropylene pipe.
Routing the pipework:
Wherever possible, the condensate
pipework should be routed internally to
prevent freezing.
• The condensate pipework must fall at least
50mm per metre towards the outlet.
• Take the shortest practicable route.
• Support the pipe at least every 0.5m for near
horizontal sections and 1m for vertical sections.
When a boiler is to be installed in an unheated
location, such as a garage, all condensate
drainage pipes should be considered as external.
External pipework:
• The pipework length should be kept to a
minimum and the route as vertical as possible.
• Do not exceed 3 metres outside the dwelling.
• Terminate as close to the ground or drain as
possible(below the grating and above the
water level) while still allowing for safe
dispersal of the condesate. This helps to
reduce wind blowing up the pipe and freezing.
Connection of a condensate drainage pipe to a
drain may be subject to local building controls.
• Pipework subject to extreme cold or wind chill
conditions should be 32mm Ø pipe.
• Protect ALL external pipework with weather
resistant insulation and box-in, if necessary,
to reduce the risk of freezing.
Making it safe:
• Condensate pipework must not leak, freeze or
block up.
• Condensate traps must be filled before firing
up the boiler to prevent the possibility of
potetially harmful flue products evacuating via
the condensate route.
• Do not dispose of condensate into a water
recovery system where it is retained for reuse.
Condensate can be discharged into a rainwater
hopper which is part of a sewer system carrying
both rainwater and foul water.
• The pipework must follow one of the options
shown opposite:
A - Condensate from the boiler condensate
trap (supplied) which has a 75mm
minimum water seal.
B - Sink.
C - 21.5mm Ø polypropylene condensate pipe.
D - Gully.
E - Internal soil and vent stack.
F - 300mm x 100mm Ø sealed plastic tube.
G - Ground level.
H - Drainage holes 50mm from base of tube
(12mm Ø at 25mm centres) facing away
from building.
I - Limestone chippings.
E
C
Invert
450 min.
A
D
A
C
75mm
min.
a - Internal waste drainage system
A
BC
D
400mm
min.
500mm min.
F
I
H
G
A
C
25mm
min.
200mm min.
Unsuitable for clay soil types
b - Soil/vent stack
d - External condensate absorption point
c - External drainage system
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR DANESMOOR WALL MOUNTED OIL 12/18-18/25
8 718 681 134a (08.08)
12
PRE -
INSTALLATION
CONDENSATE PIPEWORK

PRESSURE RELIEF PIPEWORK
IMPORTANT: The pressure relief valve is a
safety device for the boiler and if activated may
discharge boiling water or steam through the
relief valve drain pipe.
Care should be taken when siting the outlet
pipe so that it does not cause an obstruction or
discharge above a window, entrance or other
public access where it could cause a hazard.
• The pressure relief drain pipe (A) should be
at least 15mm diameter copper pipe and run
downwards away from the boiler and discharge
away from any electrics or other hazard,
preferably to an external drain or soakaway.
• Pipe (A) should be finished with a partial
bend, near the outlet to face the external wall
(as shown) to help prevent freezing.
A - Drain pipe.
B - Outside wall.
PRESSURE RELIEF PIPEWORK INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR DANESMOOR WALL MOUNTED OIL 12/18-18/25
8 718 681 134a (08.08)
13
PRE -
INSTALLATION
A
B
A

• This boiler is only suitable for installing
internally within a property at a suitable
location onto a fixed rigid vertical non
combustable surface of the same size as the
boiler and capable of supporting the boiler
weight.
• The boiler is not suitable for external
installation unless a suitable enclosure is
provided.
• Roof space installations must fully conform to
BS 5410 part 1 section 4.6.9.
Open flue model (CF):
• In order to ensure clean and efficient
combustion an adequate supply of air must
be delivered to the combustion chamber.
• To provide sufficient air a suitable inlet must
be provided into the room or space in which
the boiler is situated.
An air brick or other form of continuous air
supply may have to be built into the installation
in order to ensure an adequate supply of air.
• If the appliance is to be installed in a confined
space or compartment two air vents will be
required, one at high level and one at low
level.
• The minimum area of each vent is given in the
chart opposite and the size depends on
whether the air is taken from another room or
outside the building.
• Where air is taken from another room that
room must contain an air inlet as described
above.
Room sealed balanced flue option (RS):
• This option does not require a seperate vent
for combustion air.
• Installations in cupboards or compartments
require permanent vents for cooling purposes,
one at high level and one at low level, either
to outside air or to a room. Both vents must
pass to the same room or be on the same
wall to the outside air.
• The minimum air vent free area is given in the
chart opposite and the size depends on
whether the air is taken from another room or
outside the building.
Clearances:
• The diagram shows the minimum clearances
required around the boiler for servicing.
• At least 1300mm will be required in front of
the wall to install the boiler.
* Due to changes in BS 5410 and modern
building design, these figures no longer
incorporate the adventitious ventilation
allowance.
MINIMUM AIR VENT AREA (cm2) FOR APPLIANCES
INSTALLED IN A COMPARTMENT:
1Internal air to and from a space/room inside the building.
2External air to and from directly outside the building.
External 2ventilation
High Low
Level Level
99 198
138 275
Conventional flue:*
Internal1ventilation
High Low
Model Level Level
12/18 198 297
18/25 275 413
Room Sealed flue:*
Internal1ventilation
High Low
Model Level Level
12/18 198 198
18/25 275 275
External 2ventilation
High Low
Level Level
99 99
138 138
BOILER LOCATION &
CLEARANCES
12/18
CF minimum air inlet sizes*
99 138
18/25
Output
Size cm2
300mm
10mm
10mm
200mm
1010mm
620mm
430mm
1380mm
20mm
to removable door
600mm
front clearance
for service
PRE -
INSTALLATION
BOILER LOCATION &
CLEARANCES
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR DANESMOOR WALL MOUNTED OIL 12/18-18/25
8 718 681 134a (08.08)
14

600mm
2250mm
600mm
750mm
1 1 23
2
3
A
0
600mm
2250mm
600mm radius
750mm
A
A - Bath or shower cubicle (zone 0)
1 1 22 3
0
3
BOILER LOCATION &
CLEARANCES
COMPARTMENTS:
Follow the requirements of BS 5410 and note:
• Minimum clearances must be maintained.
• An access door is required to install, service
and maintain the boiler and any ancillary
equipment.
• If fitting the boiler into an airing cupboard
use a non-combustible material (if perforated,
maximum hole sizes of 13mm) to separate
the boiler from the airing space.
Venting compartments:
There must be sufficient clearance around the
appliance to allow proper circulation of
ventilation air. The clearances required for
installation and servicing will normally be
adequate for ventilation.
• Ventilation must be provided for boilers
fitted into compartments as described in
BS 5410.
• Combustion air must not be taken from a
room or internal space containing a bath or
shower and must not communicate with a
protected area such as a hall, stairway,
landing, corridor, lobby, shaft etc.
• Air vents must allow access for clean free
air and must be sited to comply with the flue
terminal position requirements.
• Air ducting runs must not exceed 3m.
• Low level air vents must be less than
450mm from the floor.
• A warning label must be added to the vents
with a statement to the effect: ''Do not block
this vent. Do not use for storage.”
SHOWER / BATHROOMS:
The boiler must not be installed in zones 0, 1
or 2 (the shaded areas shown on the diagrams oppo-
site).
IMPORTANT: conventional flued boilers must
not be fitted in a bathroom.
IMPORTANT: any appliance control using
mains electricity must not be able to be
touched by a person using the bath or shower.
Electrical switches, fused spur and socket
outlets must not be fitted in the bathroom.
In all cases the IEE wiring regulations must be
consulted.
Please refer to IEE regulations for cross bonding
requirements.
FBOILER LOCATION &
CLEARANCES
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR DANESMOOR WALL MOUNTED OIL 12/18-18/25
8 718 681 134a (08.08)
15
PRE -
INSTALLATION

Minimum dimensions of flue terminal positions for oil fired appliances:
TERMINAL POSITION CF RS(H) RS(V)
A1 2 Directly below an opening, air brick, opening window, etc N/A 600mm N/A
B1 2 Horizontally to an opening, air brick, opening window, etc N/A 600mm N/A
C Below a plastic/painted gutter, drainage pipe or eaves if N/A 75mm N/A
combustible material protected
D3Below a plastic/painted gutter, drainage pipe or eaves without N/A 600mm N/A
protection to combustible material
E From vertical sanitary pipework N/A 300mm N/A
F From an external or internal corner or from a surface or boundry N/A 300mm N/A
alongside the terminal
G Above ground or balcony level N/A 300mm* N/A
H From a surface or boundary facing the terminal N/A 600mm** N/A
J From a terminal facing the terminal — 1200**mm —
K Vertically from a terminal on the same wall N/A 1500mm N/A
L Horizontally from a terminal on the same wall — 750mm —
M Above the point of highest intersection with the roof 600mm — 600mm
N From a vertical structure on the side of the terminal 750mm — 750mm
O Above a vertical structure less than 750mm from the side of the terminal 600mm — 600mm
P From a ridge terminal to a vertical structure on the roof 1500mm — N/A
Q Above or to the side of any opening on a flat or sloping roof 300mm — 300mm
R Below any opening on a sloping roof 1000mm — 1000mm
Key: — Not applicable, N/A Not allowed, CF Conventional flue, RS(H) Room Sealed Horizontal flue, RS(V) Room Sealed Vertical
flue.
Notes:
1. Terminals should be positioned so as to avoid products of combustion accumulating in stagnant pockets around the building or
entering into buildings.
2. Vertical structure in N, O and P includes tank or lift rooms, parapets, dormers etc.
3. Terminating positions should be at least 1.8m from an oil storage tank unless a wall with at least 30 min fire resistance and
extending 300mm higher and wider than the tank is provided between the tank and the terminating position.
4. Where a flue is terminated less than 600mm away from a projection above it and the projection consists of plastics or has a
combustible or painted surface, then a heat shield of at least 750mm wide should be fitted.
5. If the lowest part of the terminal is less than 2m above the ground, balcony, flat roof or other place to which any person has
access, the terminal should be protected by a guard.
6. Notwithstanding the dimensions given above, a terminal should not be sited closer than 300mm to combustible material. In the
case of a thatched roof, double this separation distance should be provided. It is also advisable to treat the thatch with a fire
retardant material and close wire in the vicinity of the flue.
7. It is essential that a flue or chimney does not pass through the roof within the shaded area delineated by dimensions Q and R.
8. Where protection is provided for plastic components, such as guttering, it is essential that this is to the standard specified by the
manufacturer of the plastic components.
FLUE TERMINAL POSITIONS
• The flue must be fitted and terminated in
accordance with the recommendations of
BS5410.
• Flue terminals must be positioned to avoid
combustion products entering into buildings.
• The flue must not cause an obstruction.
• Discharge from the flue outlet must not be a
nuisance.
• Flue gases have a tendency to plume and in
certain weather conditions a white plume of
condensation will be discharged from the flue
outlet which could be regarded as a
nuisance, for example, near security lighting.
• There should be no restriction preventing the
clearance of combustion products from the
terminal.
• The air inlet/outlet duct and the terminal of
the boiler must not be closer than 25mm to
any combustible material. Detailed
recommendations on protection of
combustible materials are given in BS 5410:1
• A protective stainless steel terminal guard,
Part No: 7 716 190 050, must be fitted if
the terminal is 2m or less above a surface
where people have access.
• The following additional guidelines (from part
L Exceptions Guidance Document) are
recommended when determining the flue
outlet position:
• Avoid discharging flue gases into car ports
or narrow passageways.
• *Minimum distance of the flue terminal from
above ground is 2100mm where directed to a
public footpath, private access route or a
frequently used area and 2500mm from a
car parking area.
• **Minimum distance of the flue terminal to a
facing wall, fence, building or property
boundary is 2500mm.
O
P
boundary
F
J
H
B
A
G
E
M
C, D
N
F
F
K
L
boundary
Q
Q
Q
R
Q
Q
Q
Q
Pitched roof
Flat roof
PRE -
INSTALLATION
FLUE TERMINAL
POSITIONS
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR DANESMOOR WALL MOUNTED OIL 12/18-18/25
8 718 681 134a (08.08)
16

CONVENTIONAL FLUE
C
B
A
D
E
A - Boiler
B - Flue
C - Max. 2 bends at 135°
D - Anti down-draught terminal
E - Chimney
• Open (conventional) flued appliances must
not be installed in a bedroom, bathroom or
bedsitting room.
• The flue system must be in accordance with
BS 5410 : Part 1 and the current Building
Regulations.
• The flue must be constructed of materials
suitable for use with condensing combustion
products.
• External flue systems must be of the insulated
type.
• Brick and masonry chimneys must be lined
with a suitable non-combustible material and
properly jointed to withstand the effects of
the working temperature (minimum rating of
material 120°C) of the appliance and any
condensate which may form.
• All flue joints must be sealed to prevent the
leakage of condensate and combustion
products.
• Ensure that joints are made so that the
condensate runs away and is not collected
within the joint.
NOTE: The flue can be increased in size from
the boiler take off point providing the joint is
correctly sealed. Never reduce the flue diameter
from the boiler take off point.
CF Sizing:
• 12/18 and 18/25 = 100/103mmØ
• Because the flue operates at a lower
temperature on a condensing boiler
compaired to that of a conventional
appliance, the flue draught will be lower.
Typically the draught will be between
0.5mmwg and 4.4mmwg, measured with the
flue warm but the burner not firing. The actual
figure will vary depending on weather
conditions, flue height and position.
• The flue should be vertical and contain as few
bends as possible, a maximum of two 135°
bends should be used.
• The flue outlet must be extended beyond the
eaves of the building and where possible,
above the apex.
• Fit a suitable anti down-draught terminal
where down draughts are experienced.
• This appliance is suitable for the Worcester
‘Oilfit’ conventional flexible flue liner.
CONVENTIONAL FLUE INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR DANESMOOR WALL MOUNTED OIL 12/18-18/25
8 718 681 134a (08.08)
17
PRE -
INSTALLATION

ROOM SEALED FLUE OPTIONS
The diagrams (opposite) show the components
used and the maximum flue length (L) for
each flue configuration.
In all cases L is measured from the outside of
the boiler casing.
• To achieve the maximum flue length (L), a flue
section will have to be reduced in length.
• Only the flue terminal or straight flue
extensions can be reduced in length by
cutting.
• The horizontal flue terminal end can be fitted
from the inside or outside of the building.
IMPORTANT:
All horizontal sections must rise away from
the boiler by 52mm per metre (3°) to allow
the condensate to drain back to the boiler.
A - Horizontal terminal
B - Straight flue extension
C - Flue bend 90°
D - Flue bend 45° X 2
E - Vertical terminal
Calculating the flue length:
Measure the total flue length required, noting
that the maximum straight flue length including
the terminal is:
Horizontal 80/125mm Ø: 4000mm (excluding
120mm of terminal extending outside the building)
Vertical 80/125mm Ø: 6000mm.
Then reduce the total straight flue length for
each extra flue bend (excluding the vertical flue
kit 90° elbow) by:
1000mm for 90°
500mm for 45°
Flue Extension lengths:
Horizontal & Vertical 80/125mm Ø: 1000mm
overall length.
Effective length when engaged into sockets
within the flue run is 950mm.
Flue Terminal lengths:
Horizontal 80/125mm Ø: 720mm
Vertical 80/125mm Ø: 1080mm + cage
* to outside wall.
AC
B
D
E
A
B
C
X 4
A
B
C
X 4
A
B
C
X 4
X 2
E
BX6
E
BX4
E
BX3
X 2
L
L
L
L
L
L
PRE -
INSTALLATION
ROOM SEALED FLUE
OPTIONS
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR DANESMOOR WALL MOUNTED OIL 12/18-18/25
8 718 681 134a (08.08)
18
L = 4000mm
L = 4000mm
L = 3000mm
L = 5000mm
L = 6000mm
L = 4000mm

Unpacking:
It is advised that two or more persons are involved
in the transfer of the packaged boiler from the van
to the point of delivery.
1 Once the packaged boiler has been
delivered, the outer carton is opened first.
Care should be taken when releasing the
straps. If a sharp implement is used make
sure the outer carton is not pierced and that
the implement is used in such a way so that it
may not cause personal injury. All sharp
objects must be covered or the blade
retracted after use and put away in a safe
place.
Lift the accessories tray out of the top of the
boiler carton and place in a safe place away
from the installation area. Installation and
user instructions are in this tray.
2Lift carton up and away from the boiler.
Remove protective packaging from the front
of the boiler.
Remove protective bag from the appliance.
The flue adaptor is packaged at the base of
the boiler.
All packaging must be moved away from the
installation area to avoid a potential tripping
or slipping hazard.
At all times the correct method for handling
heavy objects should be strictly observed.
The unpacking of the appliance requires the
removal of the board support at the base of
the boiler. Instructions for this are on the
following pages.
UNPACKING THE BOILER
LIFTING AND CARRYING PRECAUTIONS:
• Lift only a manageable weight, or ask for
help.
• When lifting or putting things down, bend
the knees, and keep the back straight
and feet apart.
• Do not lift and twist at the same time.
• Lift and carry objects close to the body.
• Wear protective clothing and gloves to
protect from any sharp edges.
IIMPORTANT: All the previous Pre-Installation sections must be read
and requirements met before starting boiler or flue installation.
1
2
INSTALLATION
UNPACKING THE BOILER INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR DANESMOOR WALL MOUNTED OIL 12/18-18/25
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