Worcester Bosch Danesmoor Utility 12/14, Danesmoor Utility 15/19, Danesmoor Utility 20/25, Danesmoor Utility 26/32 Installation And Servicing Instructions

DANESMOOR UTILITY

12/14, 15/19, 20/25, 26/32

WORCESTER BOSCH

50/70, 70/90, 90/110

FLOOR STANDING OIL-FIRED

PRESSURE-JET BOILERS WHEN FITTED INSIDE

OUTDOOR PACK

INSTALLATION AND

SERVICING INSTRUCTIONS

IMPORTANT: Please discard all previous Installation and Servicing instructions.

Retain ONL

THESE INSTRUCTIONS ARE TO BE LEFT WITH THE APPLIANCE

This appliance must be installed and serviced by a competent person

Y the Worcester Outdoor Pack Installation and Servicing

Instructions.

Contents

1. Installation Regulations ...........................................Page 2

2. General Information .................................................Page 2

3. Technical Data...........................................................Page 3

4. Siting the Appliance.................................................Page 7

5. Removal of the Cabinet............................................Page 7

6. Air Supply..................................................................Page 7

7. Flue System...............................................................Page 7

1. Installation Regulations

1.1 General installation information and advice may be obtained
from the Oil Firing Technical Association for the Petroleum
Industry (OFTEC). Training courses are also offered by OFTEC,
leading to inclusion on their list of registered engineers.

1.2 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
should be commissioned by a qualified engineer.

1.3 The manufacturers notes must not be taken, in any way, as
overriding statutory obligations.

1.4 The compliance with a British Standard does not, of 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.
The Building Regulations Part J and L1 England and Wales; Part F

Section III and Part J Scotland; Part L and Part F Northern Ireland.
Local water company bye-laws.
The Control of Pollution (Oil) Regulations.

1.5 To ensure that the installation will perform to the highest
standards, the system and components should conform to those
mentioned in the instructions.

2. General Information

The Benchmark initiative is the new code of practice to

encourage the correct installation, commissioning and servicing
of domestic central heating boilers and system equipment.

The 'Log-book' is a vital document that must be completed
by the installer at the time of installation. It confirms that the
boiler has been installed and commissioned according to the
manufacturers instructions.

Without the completion of the Log-book, manufacturers may refuse
to respond to a call-out from a householder, who will be advised
that he or she must call back the installer, who has not fulfilled his
obligations to record the information required by the initiative.

It is important that:

The services and the system are properly flushed as specified.
The User is clearly instructed on the correct operation of the appliance.

8. Oil Supply ..................................................................Page 9

9. Heating and Hot Water System...............................Page 11

10. Electrical ....................................................................Page 13

11. Installation ................................................................Page 15

12. Commissioning the Appliance ................................Page 22

13. Instructions to the User ...........................................Page 26

14. Routine Cleaning and Inspection............................Page 26

15. Short Parts List..........................................................Page 28

16. Fault Finding .............................................................Page 29

The benefits of regular servicing are explained - to maintain the
efficiency and extend the life of the appliance.

NOTE: When installing the Danesmoor Utility or Worcester Bosch
boiler inside the Outdoor Pack only use the Outdoor Pack
installation and service instructions, Part Number 8 716 104 781.
Discard the Danesmoor Utility (Part No 8 716 104 437), Worcester
Bosch (Part No 8 716 8 716 104 438), and the RS short silencer
(Part No 8 716 104 861) installation and servicing instructions.

2.1 These instructions cover the Danesmoor Utility or Worcester
Bosch appliances when fitted inside the Outdoor Pack (Part Number
7 716 192 273), the RS short silencer (Part Number 7 716 190 002)
and flue terminal guard (Part Number 7 716 190 009).

2.2 The Worcester Danesmoor Utility appliances covered in these
instructions are conventional flued low level discharge appliances, which
have been designed to serve domestic central heating and hot water
requirements ranging from 12 kW to 32 kW. The boiler is factory set to
the mid-range output and can be altered, if necessary, by adjusting the
burner as specified in Tables 2 to 5. The 12/14, 15/19, 20/25 and 26/32
models are only suitable for use with 28 second Kerosene heating oil.

2.3 The Worcester Bosch appliances covered in these instructions are
conventional flued low level discharge appliances, which have been
designed to serve domestic central heating and hot water requirements
ranging from 51,000 Btu/h to 109,000 Btu/h. The boiler is factory set to
the mid-range output and can be altered, if necessary, by adjusting the
burner as specified in Tables 3 to 5. The 50/70, 70/90 and 90/110
models are only suitable for use with 28 second Kerosene heating oil.

2.4 The appliance is suitable for connection to fully pumped
conventional indirect hot water systems utilising an indirect double
feed cylinder. This appliance is not suitable for use on gravity systems.

2.5 The service engineer should always have access to the inside of
the property when servicing the appliance, to check for system faults
and reset/replace electrical safety devices. A service switch is provided
to allow the service engineer to isolate the boiler. See Section 10.

2.6 The electrical supply to the appliance should be fed via a
separate circuit breaker including earth leakage protection.

WARNING: This appliance is serviced and repaired externally.
External equipment operated at 230volts should not be
serviced or repaired under adverse weather conditions.

WARNING: This appliance should not be installed where there
is potential for excessive ground water coverage.

NOTE: It is a mandatory requirement of the building regulations
that only 28 second kerosene is used on low level discharge flues.

In the event of a lockout condition, the householder resets the

2.7

burner by completely isolating the appliance inside the property,
removing the Outdoor Pack front cover, the boiler front cover, and
pressing the lockout reset button on the burner.

2.8 An electrical service lead is fitted to the underside of the
external control box enabling the service engineer to use a light or
vacuum cleaner.

NOTE: Any electrical equipment used with this lead should be
protected by separate RCD safety unit.

NOTE: When installing the Danesmoor Utility or Worcester
Bosch in conjunction with the Outdoor Pack and RS Short
Silencer only use the Outdoor Pack installation and servicing
instructions. The instructions received with the boiler and the
RS short silencer should be discarded.

2

3. Technical Data

Table 1

SPECIFICATIONS

Danesmoor Utility MODEL

Wor cester Bosch MODEL

PO

WER SUPPLY

IP RATING IP 45 IP 45 IP 45 IP 45

HEATING FLOW

HEATING RETURN

HEIGHT (BOILER)
WIDTH (BOILER)
DEPTH (BOILER)

HEIGHT (OUTDOOR PACK)

(OUTDOOR PACK)

WIDTH

(OUTDOOR PACK)

DEPTH
FUEL LINE
FLUE REQUIREMENT

HEARTH TEMPERATURE

MAXIMUM STATIC HEAD

BOILER WEIGHT

OUTDOOR WEIGHT

PRIMARY WATER CAPACITY

PACK

BURNER

WATER SIDE RESISTANCE
10°C Difference

WATER SIDE RESISTANCE
20°C Difference

12/14 15/19 20/25 26/32

/ 50/70 70/90 90/110

230V 50 Hz 230V 50 Hz 230V 50 Hz 230V 50 Hz

1 in. BSP 1 in. BSP 1 in. BSP 11/4 in. BSP

1 in. BSP 1 in. BSP 1 in. BSP 11/4 in. BSP

855 855 855 855
370 370 370 520

600 600 600 600

975

670

1

/4 in. BSP

1

/4 in. BSP

760

1

/4 in. BSP

1

/4 in. BSP

RS Short Silencer 7 716 190 002

Below 100°C

30m (98 ft. )

94 Kg (207 lbs) 97 Kg (214 lbs) 107 Kg (236 lbs) 138 Kg (304 lbs)

36Kg (79lbs)

20 litres (4.4 gal.) 20 litres (4.4 gal.) 23.5 litres (5.2 gal.) 29.1 litres (6.4 gal.)

Electro Oil Electro Oil Electro Oil Electro Oil

Inter B9 A Inter B9 B Inter B11C Sterling 40

7 mbar 8 mbar 18 mbar 35 mbar

3 mbar 6 mbar 12 mbar 19 mbar

EXIT FLUE GAS
MASS FLOW

24 kg/hr 35 kg/hr 43 kg/hr 57 kg/hr

SEDBUK RATING* 85.3% 85.5% 85.3% 85.3%
( SEDBUK BAND C )

CONTROL THERMOSTAT
RANGE

CONTROL THERMOSTAT
DIFFERENTIAL

HIGH LIMIT THERMOSTAT

55°C minimum cut in to 82°C maximum cut out

5°C

100 + 0/ – 6°C

BREAK POINT

MANUAL RESET THERMOSTAT
BREAK POINT

FROST THERMOSTAT RANGE

110 + 0/ – 6°C

5°C cut in to 10°C cut out

* The value is used in the UK Government Standard Assesment Procedure (SAP) for energy ratings for dwellings.

Fig. 1. Principal Dimensions Of Boiler Fitted Within Outdoor Pack (All Dimensions are in millimetres)

A

Front View

CD

Flue centre

Side View

F

G

Model AB C D E F G

12/14 370 600 855 780 110 92 56

15/19 (50/70) 370 600 855 780 110 92 56

20/25 (70/90) 370 600 855 780 110 92 56

26/32 (90/110) 520 600 855 775 110 92 56

E

B

3

3

Fig. 2. Outdoor Pack Principal Dimensions. (All Dimensions are in millimetres)

670 760

975

740

Flue terminal

Flue terminal

guard

212

267

X

X= 806 (26/32 and 90/110) X= 811 (on all other models)

68

148

238

142

Danesmoor Utility 12/14 Table 2. Electro Oil Inter B9A Burner (See Fig. 29)

NOMINAL BOILER RATING AT NORMAL OPERATING TEMPERATURE

Fuel Nozzle

Pump

Pressure

(p.s.i.)

Fuel Flow

Rate

Kg/h l/h

Flue Gas

Temp.
(°C)**

%CO

2

Approx.

Air

Setting

kW Btu/hr kW Btu/hr

Input

Appliance

Output

28 Sec. Kerosene 0.40 60°ES 130 1.11 1.41 180 10 6.0 13.5 46,000 12 41,000

28 Sec. Kerosene 0.50 60°ES 100 1.30 1.64 195 11.5 7.0 15.5 53,000 14 48,000

Danesmoor Utility 15/19 and Worcester Bosch 50/70 Table 3. Electro Oil Inter B9B Burner (See Fig. 30)

NOMINAL BOILER RATING AT NORMAL OPERATING TEMPERATURE

Fuel Nozzle

Pump

Pressure

(p.s.i.)

Fuel Flow

Rate

Kg/h l/h

Flue Gas

Temp.
(°C)**

%CO

2

Approx.

Air

Setting

kW Btu/hr kW Btu/hr

Input

Appliance

Output

28 Sec. Kerosene 0.50 60°ES 110 1.40 1.77 215 10.5 8.5 17 58,000 15 51,000

28 Sec. Kerosene 0.55 80°EH 115 1.59 2.01 225 10.5 8.75 19 65,000 17 58,000

28 Sec. Kerosene 0.60 60°ES 105 1.78 2.25 235 11.5 9.0 21.5 73,000 19 65,000

798

Danesmoor Utility 20/25 and Worcester Bosch 70/90 Table 4. Electro Oil Inter B11C Burner (See Fig. 31)

NOMINAL BOILER RATING AT NORMAL OPERATING TEMPERATURE

Fuel Nozzle

Pump

Pressure

(p.s.i.)

Fuel Flow

Rate

Kg/h l/h

Flue Gas

Temp.
(°C)**

%CO

2

Approx.

Air

Setting

kW Btu/hr kW Btu/hr

Input

Appliance

Output

28 Sec. Kerosene 0.60 80°EH 130 1.87 2.37 190 11.0-11.5 5.5 22.5 77,000 20 68,000

28 Sec. Kerosene 0.75 80°EH 105 2.10 2.66 205 11.5-12.0 6.0 25 86,000 22.5 77,000

28 Sec. Kerosene 0.75 80°EH 130 2.34 2.96 220 12.0-12.5 6.5 28 96,000 25 85,000

Danesmoor Utility 26/32 and Worcester Bosch 90/110 Table 5. Electro Oil Sterling 40 Burner (See Fig. 32)

NOMINAL BOILER RATING AT NORMAL OPERATING TEMPERATURE

Fuel Nozzle

Pump

Pressure

(p.s.i.)

Fuel Flow

Rate

Kg/h l/h

Flue Gas

Temp.
(°C)**

%CO

2

Approx.

Air

Setting

kW Btu/hr kW Btu/hr

Input

Appliance

Output

28 Sec. Kerosene 0.85 80°EH 110 2.36 2.99 225 11.0-11.5 11 28.5 97,000 26 89,000

28 Sec. Kerosene 0.85 80°EH 130 2.66 3.37 240 11.0-11.5 12 32 109,000 29 99,000

28 Sec. Kerosene 1.00 80°EH 130 2.95 3.74 245 11.5-12.0 16 35.5 121,000 32 109,000

** NOTE: The flue gas temperature is measured in the gas sampling hole on the flue outlet plate. The probe should be inserted to a depth of 50mm and angled towards the flue outlet. The temperature measured is not an
absolute flue gas temperature and is for general guidance purposes only!

NOTE: The pump pressure given is for general guidance only as variations in nozzle output can be up to ± 15%. It is, therefore, essential that the air is adjusted to give the correct CO

NOTE: The nozzle type used on 28 Sec. Kerosene outputs are nozzles calibrated specifically for use with 28 Sec. Kerosene which gives less variation in nozzle output than the standard 35 Sec. Gas Oil nozzles. However, if a 28

Sec. Kerosene nozzle is not available at servicing or commissioning it is appropriate to install a 35 Sec. Gas Oil nozzle providing the output, spray angle and pattern of the nozzle is the same as the 28 Sec. Kerosene nozzle (e.g.

0.75 80°EH may be replaced with a 0.75 80°H).

2

value.

4

Fig.3. Conventional Flue Appliance (CF/LLD). Fitted within Outdoor Conversion Kit.

Control Box Assembly

Manual reset over­heat thermostat

Split pin

Top panel

Fire valve clip

phial

Automatic reset high
limit thermostat phial

High limit thermostat

Control thermostat
phial

Manual reset
overheat
thermostat

Burner locking
screw

Burner seal
gasket

Burner plug-in
connector

Strain relief
bush

Burner

Thermostat
knob

Side panel

Side panel
locking screw (A)

Front panel

5

Fig.4. Outdoor Pack.

Top panel bracket

Open side panel

Top panel

Rear panel

Rear panel

bracket

Silencer blanking plate

Clamping collar

Handlewheel

Front panel

Rail

M8 nut

Brace

Water plate
(A)

Closed side panel

Fire valve plate

Oil plate

Gasket

Clamp

Outdoor

control box

Frost

thermostat

phial

Water plate

(B)

Silencer bracket

Rear panel

locating tabs

Template

Front panel locating tabs

For fixing the base to the
hard standing use the 4
holes provided in the base.

Base

6

4. Siting The Appliance

7. Flue System

4.1 The appliance is only suitable for external installation.
WARNING: This appliance should not be installed where
there is potential for excessive ground water.

4.2 The appliance should be positioned and fastened on a non-

combustible solid base and care should be taken to ensure that
the appliance is level.

4.3 When siting the appliance the flue terminal must be
positioned such that the flue terminal can safely discharge the
flue gases as described in Section 7.

4.4 The following clearances must be left to allow access for
installation and servicing:

(a) Above - 600mm
(b) Rear (from flue terminal) see section 7 and figure 5
(c) In front - 600mm
(d) Right or left hand side against wall – 10mm
(e) Right or left hand side not against the wall of the

property – 600mm

5. Removal Of The Cabinet

See Figs. 3 and 4.

Outdoor Pack Removal

For servicing of the appliance the cabinet should be removed as
follows:

5.1 Remove the Outdoor Pack front cover by undoing the two
handwheels on the door and padlock if fitted. Pull forward at the
top of the panel and lift the front cover to release from the
locating tabs on the base

5.2 Remove the Outdoor Pack top cover by removing the two
fixings and push back to release from the locating strip at the
back of rear panel.

Boiler Cabinet Removal

For installation and servicing of the boiler the cabinet should be
removed as follows:

5.3 Remove the cabinet top panel by lifting squarely upwards to
release the four ball stud connections.

5.4 Remove the front panel by pulling the bottom of the panel
forwards to release the lower ball studs and then repeat the
procedure at the top end to release the upper ones. Take care
not to pull the bottom end too far forwards as this may cause
damage to the spring clips.

5.5 The side panels are removed by firstly following procedures

5.3 to 5.4 as described above, then remove screw (A) from the
side panel base and the three screws located in the upper flange
of each side panel. Ease the panel clear of the electrical control
box and slide forwards to release from the locating lugs on the
base plate.

5.6 To remove the outdoor control box, which is positioned
below the control, box remove the four fixings and pull down.

5.7 The control box can be removed by undoing the four screws
in the front facia cover and then removing the wing nut on the
underside of the control box. The thermostat phials should be
carefully removed from the phial pockets and the control box
placed in a safe place taking care not to kink the thermostat
capillary tubes.

7.1 The appliance must be installed in conjunction with the RS
Short Silencer kit, this is available from Worcester Heat Systems,
Part Number 7 716 190 002. For details on the installation pro­cedure refer to Section 11.4 and 11.5 of these installation and
servicing instructions.

7.2 Siting of the flue outlet terminal

1. The flue outlet terminal must be located in a suitable position,

as shown in Fig.5, such that the products of combustion can be
freely dispersed without the possibility of gases entering the
dwelling or that of a neighbouring dwelling.

2. Discharge of flue gases into car ports or narrow passage ways
is not recommended.

3. The terminal must not cause an obstruction or the discharge
cause a nuisance as a result of either flue gases or terminal
noise.

4. If the terminal is fitted within 600mm of a plastic/painted gut­ter or painted eaves an aluminium or stainless steel shield at
least 750mm long should be fitted to protect the surface.

5. A flue terminal guard should be fitted. A flue terminal is avail­able from Worcester Heat Systems, Part Number 7 716 190 007.
For details on the installation procedure refer to Section 11.6.

6. Air Supply

The appliance is for external installation only and does not
require a separate vent for combustion air.

.

7

L

F

F

K

G

A

E

B

C.D.

J

H

F

Boundry

Boundry

Fig.5. Flue outlet terminating positions for oil-fired appliances

NOTE: The dimensions given are for general guidance only. Other surrounding buildings or objects may affect the clearance of

combustion products. An alternative flue terminal position should be sought when there is any possibility of a nuisance being
caused by inadequate dispersal of flue products.
Terminals should be positioned so as to avoid products of combustion entering into buildings.

Window

Flue outlet
Terminal

Flue outlet Terminal Position Minimum Distance (mm)

A Directly below an opening, air brick, window, etc...................................... 600

B Horizontally to an opening, air brick, window, etc..................................... 600

C Below a gutter, sanitary pipe or eaves if combustible material protected 75

D Below a gutter, sanitary pipe, eaves or balcony without protection....... 600

E From vertical sanitary pipework.................................................................... 300

F From an internal or external corner or boundry along side terminal...... 300

G Above ground or balcony level...................................................................... 300

H From a surface or boundry facing the terminal.......................................... 600

J From a terminal facing the terminal............................................................. 1200

K Vertically from a terminal on the same wall............................................... 1500

L Horizontally from a terminal on the same wall.......................................... 750

NOTE: Flue outlet is shown in Fig. 2.

8

8. Oil Supply

3. An oil filter should be fitted close to the oil storage tank. If
there is doubt about the internal oil line condition, a further filter
should be fitted near the boiler.

(See Figs. 6, 7 and 11).

8.1 Plastic or steel tanks should be installed to BS5410.
A steel tank should also conform to BS799: part 5 and be arranged
with a slope of 1 in 24 away from the outlet valve with a sludge cock
at its lower end.

8.2 Do not use galvanised steel tanks or pipework for the oil supply
system.

8.3 Do not use soldered joints on the oil supply pipework as this
could cause a hazard in the case of a fire.

8.4 The burners on all appliances are supplied so as to be
connected to a single pipe gravity feed system. Details of how to
convert the burners to a double-pipe sub-gravity feed system are
shown in Fig. 6.

8.5 Oil Supply System
(a) Single Pipe System

If a single pipe system is employed then the tank must be positioned
such that the oil level does not exceed 4 metres above the level of
the burner oil pump and in addition the oil level must be at least 0.3
metres above the level of the oil pump. Should it prove impossible to
site the tank below the 4 metres maximum oil level a head breaking
device must be installed between the tank and the burner.

(b) Double Pipe System
If a double pipe system is used then the maximum suction
height allowable is 3.5 metres.

(c) Single Pipe Suction Lift with De-aerator
If a single pipe suction lift with a de-aerator is used, the oil tank
must be positioned below the burner. An inlet and return loop
should be created between the de-aerator and oil pump. The oil
pump should be connected as for a double pipe system. Details of
how to convert to a double pipe system are shown in Fig. 6.

Oil inlet and return flexible hoses should be connected to the oil
pump inlet and return ports.

Table 8 is a general guide to determine the maximum allowable
pipe run when using a de-aerator.

Table 8 does not override the de-aerators manufacturers instruc­tions and should only be used in conjunction with the manufac­turers instructions.

If a non-return valve is not incorporated within the de-aerator
unit, a non-return valve should be fitted in the oil line between
the oil tank and the de-aerator.

NOTE: If a de-aerator is used it should be fitted externally to the building.

8.6 Oil Supply Pipework

The oil supply pipe diameter can be determined using Tables 6, 7

a)

and 8 depending on whether a single or double pipe system or sin­gle pipe system with de-aerator is being installed. Selection of the
correct pipe diameter will depend on the position of the oil storage
tank relative to the burner and the length of the pipe run.

b) The oil supply pipe should be laid as level as possible to avoid
air pockets and unnecessary friction losses.

c) Oil supply pipework should be made in rigid pipework firmly
attached to the wall or other secure structural element.

d) The following components should be fitted in the fuel line
between the storage tank and burner:

1. A manual isolating valve installed as close to the tank as possible.

2. A fire valve in accordance with BS5410 as shown in Fig. 6. The fire

valve should be fitted externally with a fire detection element located
within the boiler case. Use of a capillary type valve will allow a neat
and simple installation. A suitable valve is the KBB C90 manufactured
by Teddington Controls Limited. A spring clip has been provided
behind the electrical panel, shown in Fig. 3, to allow a fire valve ele­ment to be mounted. 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.

NOTE: The fire valve should be positioned at least 1 metre away
from the Outdoor Pack.

Fig. 6. Oil Pump.

A. Danfoss BFP 41.

Cartridge filter

5

3

6

4a

12

4

B. Danfoss BFP 11 Oil Pump.

3

5

2

6

4

1

C. Suntec AS47C Oil Pump.

4

5

3

2

3

B

1

A

TABLE 6 Single Pipe Gravity Feed System

MAXIMUM ALLOWABLE PIPE RUN

HEAD (metres)

8 mm inside dia. pipe 10 mm inside dia. pipe
(10 mm O.D. copper) (12 mm O.D. copper)

0.5 12 30

1.0 25 69

1.5 37 91

2.0 49 100

2.5 62 100

3.0 74 100

3.4 87 100

4.0 99 100

TABLE 7 Double Pipe Sub-Gravity Feed System

MAXIMUM ALLOWABLE PIPE RUN

HEAD (metres)

8 mm inside dia. pipe 10 mm inside dia. pipe

(10 mm O.D. copper) (12 mm O.D. copper)

050 100

0.5 44 100

1.0 38 95

1.5 32 80

2.0 26 66

2.5 20 51

3.0 14 37

3.5 8 22

9

1 INLET
2 RETURN
3 BLEED AND PRESSURE

GAUGE PORT
4 VACUUM GAUGE PORT
5PRESSURE ADJUSTMENT
6NOZZLE OUTLET

To convert to a double pipe sys­tem, remove plug 4a and insert
the grub screw provided into the
threaded hole. Connect flow and
return pipes to (1) and (2).

To convert to a double pipe sys­tem: Remove the pump front
cover, remove the changeover
screw (A) nearest to ports 1 and
2, and the horseshoe washer
underneath. Replace the
changeover screw back into the

A

threaded hole. Connect the flow
and return pipes to 1 and 2.
Note: When removing the pump
front cover ensure that a suitable
receptacle is placed below the
pump to catch the oil residue.

To convert to a double pipe sys­tem, remove the return port plug
(2) and insert the grub screw (A)
provided into the threaded hole
(B). Connect flow and return pipes
to (1) and (2).

(metres)

(metres)

TABLE 8 Single Pipe Suction Lift with De-aerator

Fuel

MAXIMUM ALLOWABLE PIPE RUN FROM TANK TO DE-AERATOR (metres)

Flowrate 2.5 (kg/h) 5.0 (kg/h) 10.0 (kg/h) 10.0 (kg/h)

HEAD

(metres)

6 mm inside dia. pipe 8 mm inside dia. pipe

(8 mm O.D. copper) (10 mm O.D. copper)

0 100 55 26 100

0.5 95 45 23 100

1.0 80 40 20 90

1.5 70 35 17 75

2.0 60 30 14 65

2.5 45 25 11 50

3.0 35 15 8 35

3.5 25 10 5 20

Fig. 6. Oil Supply.

(a) Single pipe system

Oil tank

Filter

Maximum oil level

Fire valve to

BS 5410

Isolating

valve

Paper element

oil filter

Full base

(for plastic tanks)

Isolating

valve

(b) Double pipe system.

Oil tank

150mm

Full base

(for plastic tanks)

Isolating

valve

(c) Single pipe lift system with de-aerator.

Filter

Non return

valve

Burner

Isolating

valve

Fire detection element

1m (3ft) minimum from Fire Valve to Outdoor Pack

Non return

valve

Burner

Isolating

valve

Fire valve to

BS 5410

1m (3ft) minimum from Fire Valve to Outdoor Pack

De-aerator

Isolating

valve

Fire detection

element

H = 4 m (13 ft) maximum

H = 0.3 m (1 ft) minimum

H = 3.5 m (11.5 ft) maximum

Oil tank

Full base

(for plastic tanks)

Filter

Isolating

valve

Fire valve to

BS 5410

Isolating

valve

10

Burner

H = 3.5 m (11.5 ft) maximum

Fire detection

element

1m (3ft) minimum from Fire Valve to Outdoor Pack

9. Heating And Hot Water System

The heating and hot water system must be provided in accor­dance with the current Building Regulations.

9.1 The appliance is suitable for connection to fully pumped
conventional indirect hot water systems utilising an indirect
double feed cylinder. This appliance is not suitable for use on
gravity systems.

9.2 The flow and return sockets are located at the rear of the
appliance, two at high level (flow) and two at low level (return).
Connection of the flow and return sockets must be made on the
same side of the boiler depending on the position of the boiler
within the Outdoor Pack.

9.3 On new installations it is recommended a room thermostat
or programmable room thermostat is used in the main zone and
thermostatic radiator valves are used in further heating zones.

On existing systems where a room thermostat is already fitted it
is recommended to fit thermostatic radiator valves at least in the
sleeping zones.

A automatic system bypass should be fitted on heating systems
when all of the radiators are fitted with thermostatic radiator valves.

9.4 The pressure jet burner fitted to the appliance has full
automatic control and hence there is no requirement for heat
leak radiators.

9.5 The appliance is suitable for connection to open vent or
sealed primary systems.

9.6 Any unused boiler tappings should be plugged prior to
filling. It should be noted that the flow tapping on the front of the
boiler requires plugging.

9.7 Drain cocks should be fitted on the lowest points on the
system to allow draining of the appliance and system.

9.8 The primary system should be flushed and treated in
accordance with the recommendations of BS 7593: before
the system is handed over to the user.

9.9 The pump should be set in accordance with the heating
load requirements to give a flow and return differential
temperature of 11°C under full load conditions.
NOTE: Exposed pipework should be properly insulated to
protect against frost damage.

Open Vent Primary System (See Fig. 8).
The following points are for guidance only. The system installation

should be carried out in accordance with BS 5449: Part 1.

1. System Pipework
The first metre of pipework from all appliance connections must be

in copper; afterwards copper or plastic pipe can be used. The
plastic pipe must be manufactued to BS 7291 and installed to BS
5955 part 8. It is recommended to protect the system components
the plastic pipe specified must be resistant to the ingress of oxygen.

2. Feed and Expansion System
The feed and expansion pipes must rise continuously from the
appliance and must be of the minimum diameter shown in Fig. 8.
The cistern must be arranged to provide a minimum static head of
1 metre above the top of the highest point in the heating circuit.

3. Filling and Venting
Air in the appliance is expelled through the vent pipe or
dissipated into the system. Manual air vents should be fitted at
any high points in the system.

Sealed Primary System (See Figs. 9 and 10).
The appliance is supplied with a manual reset high limit thermostat
and may therefore be fitted to a sealed heating system.

1. System Pipework
Copper pipework must be used when installing the appliance on

a sealed system.

2. General
The system should be installed in compliance with

therequirements of BS5449: Part 1. The boiler must be fitted
with a spring loaded safety valve set to operate at 3 bar (45 psi)
and the pipe connections made throughout the system must be
capable of sustaining a pressure of up to 3 bar.
The following is a list of major items, which must be fitted to a
sealed system:

1. Safety valve - 3 bar

2. Pressure gauge - 0 to 4 bar.

3. Expansion vessel

4. Automatic air vent.

Fig. 8. Typical fully pumped open vent system (Honeywell ‘Y’ plan).

Feed and
Vent Cistern

Primary

cold feed

(15mm min.)

Heating vent
(22mm min.)

Boiler

150mm max

S.H.

Domestic hot
water cylinder

Diverting

valve

Pump

S.H. – Minimum static head 1m (3ft)
measured from the highest point in the
heating system (top surface of the appliance

S.H.

or highest point in the heating system) to the
water level in the feed and expansion tank

N.B. A drain cock should be
installed at the lowest point of
the heating circuit

Radiator

Automatic bypass valve to be fitted
where thermostatic radiator valves
are fitted on all radiators

11

Fig. 9. Typical fully pumped sealed system (Honeywell ‘Y’ plan).

Automatic

air vent

Domestic hot
water
cylinder

Safety valve

Boiler
Boiler

Expansion
Vessel

To system filling device (see Fig.10)

Fig. 10. System filling and make-up

Pressure
gauge

Pump

Diverting

valve

Radiator

Automatic bypass valve to be fitted
where thermostatic radiator valves
are fitted on all radiators

Auto air

Heating

return

vent

Non return

valve

Stop
cock

N.B. A drain cock should be
installed at the lowest point of
the heating circuit

Make up

vessel

30mm (12in) min.
above highest
point of the system

METHOD 1

Fill point.

Heating return

METHOD 2

12

10. Electrical

(See Figs. 11 to 13).

10.1 The wiring between the appliance and the electrical supply
shall comply with current IEE Wiring Regulations (and any local
regulations which apply) for fixed wiring to a stationary appliance.

The method of connection must allow complete isolation of the
appliance and the supply to the boiler must be the only electrical
supply to the system. This ensures the safety of a single fused
supply.

NOTE: The appliance provides a permanent external electrical
supply for servicing and should therefore be fed via a circuit
breaker including earth leakage protection.

10.2 To gain access to the electrical terminal strip.

1. Isolate the mains electrical supply from within the
property

2. Remove the Outdoor Pack front cover by undoing the two
handwheels on the door and padlock if fitted. Pull forwards
at the top of the panel and lift the front cover to release
from the locating tabs on the base.

3. Remove the boiler front panel by pulling forwards to
release the ball studs.

4. Pull the thermostat control knob forwards to remove
from its spindle.

5. Undo the facia retaining screws and remove the plate.

10.3 Mains Wiring

Mains supply - 230 V AC ~ 50 Hz 5A External Fuse to BS1362.
SWITCHED LIVE - Black, NEUTRAL - Blue, EARTH - Green/Yellow,

PERMANENT LIVE-Brown
Mains Cable: 0.75mm2 (24 x 0.20mm) to BS 6500 Table 16.

The supply to the boiler must be the only electrical supply to the
system. This ensures the safety of a single fused supply.

The mains supply four core cable should be connected into the
terminals marked Perm L (Permanent Live), Switch L (Switched
Live), N (Neutral) and E (Earth) on the outdoor control box
terminal strip and securely held in the cable clamp located in the
left-hand side of the outdoor control box.

To secure the cable, remove the clamp retaining screws and lift its
top section up to allow the cable to be fed through. With the cable
in position refit the two screws and fully tighten to grip the cable.
Feed the cable between the side panel and the boiler insulation
jacket to the back of the boiler. Avoid any hot surface and route
through the open/close bush provided on the open side panel of
the Outdoor Pack. Once the cable is outside the Outdoor Pack it
should be protected by conduit until inside the property.

The mains supply three core cable from the Outdoor Pack
control box should be connected into the terminals marked L
(Live), N (Neutral) and E (Earth) on the boiler terminal strip and
securely held in the cable clamp located in the right-hand side of
the electrical tray base. To secure the cable, remove the clamp
retaining screw and pull its inner body out to allow the cable to
be fed through. With the cable in position refit the screw and
fully tighten to grip the cable. The cable clamp on the
Danesmoor Utility (12/14, 15/19 and 20/25) and the Worcester
Bosch (50/70 and 70/90) should be moved to the alternative
position on the right hand side of the boiler electrical control box

The appliance must be earthed.

10.5 Safety Check

In the event of an electrical fault after the installation of the
appliance, the electrical system shall be checked for short
circuits, fuse failure or incorrect polarity of connections.

10.6 Pre-wired Remote Y Plan or S Plan System

(See Fig.13).
If the system is fully pre-wired at a junction box remotely from
the boiler it can be connected to the boiler. The diagram shows­connection details of two popular proprietary systems
(Honeywell and Invensys), for these and other systems from
other manufacturers always use the boiler instructions in con­junction with the system instructions..

10.7 Frost Protection

The appliance is supplied with a frost thermostat with the phial
positioned within the boiler casing, this protects the boiler only.

For full frost protection of the property and/or system a frost
thermostat should be fitted so that both the boiler and the
circulating pump circuits are energised under frost

conditions.
Outdoor Pack control box (See Fig. 3)
A service switch has been provided to allow the service engineer

to service the appliance from outside the property (See Fig.11) .

The engineer should have access to the property to set the
heating system controls to give a central heating demand so
that heat generated during the burner testing can be dissipated.

The switch settings are:

'Run' Mode -The boiler is controlled by the programmer. There
is power to the 3-pin trailing socket allowing the use of a light in
low light conditions.

'Service' Mode- There is no power to the boiler but there is
power to the 3-pin trailing socket allowing the use of a light or
vacuum cleaner for servicing purposes.

NOTE: To isolate mains supply to the appliance (including the
Outdoor Pack control box) switch off the supply inside the
property

After serving the appliance the Service engineer must leave the

appliance in the 'run' mode.

Fig. 11. Service Switch Positions

Service Switch

in

'Run'

Mode

Service Switch

in

'Service'

Mode

10.4 Programmer

A time clock or programmer may be added to the control
system. A two channel programmer will allow independent
control of the central heating and hot water.

NOTE: Under no circumstances should the timer be connected to
a separate electrical supply. Safety is assured from a single fused
supply to the boiler.

NOTE: ALWAYS SET THE SWITCH TO 'RUN' AFTER SERVICING

13

Fig. 12. Wiring Diagram (Standard).

Trailing

socket

N

L

Blue

Green/Yellow

Brown

L

N

L

Perm

Switch

Mains supply

230V/ 50Hz

5A external fuse

Outdoor Pack control box

Frost thermostat

Blue

Black

Service

switch

High limit

thermostat

Blue

Brown

Green/Yellow

Brown

Brown

Green/Yellow

Boiler Control Box

Control

thermostat

( 1 )

( C )

Plug in connector

1

2

N

L

3

Manual reset

thermostat

Brown

Brown

Green/Yellow

Blue

Brown

Green/Yellow

12 34 5 67 8E9

Fig. 13. Pre-wired Remote ‘Y’ Plan or ‘S’ Plan.

Tank Stat

Room Stat

Remote Pre-wired
Junction Box

Mains Wiring

230V 50Hz (5 amp fuse)

10 WAY JUNCTION BOX

System Water Valves

Pump

External Timer

Satronic burner control box

NOTE: If a frost thermostat is required it
can be wired to the remote junction box.

NOTE: The 10 way junction box must be
a terminal block type and current rated
to at least 5 amps.

Outdoor Pack
Connector Block

Switched

Live

Permanent

Live

Neutral

14

OUTSIDE OUTDOOR PACK

INSIDE OUTDOOR PACK

Earth

11. Installation

The outdoor appliance is installed and serviced externally to the
property, but the engineer must have access to inside of the
property when servicing the appliance.

WARNING: This appliance is serviced and repaired externally.
External equipment operated at 230volts should not be
serviced or repaired under adverse weather conditions.

WARNING: This appliance should not be installed where
there is potential for excessive ground water coverage.

NOTE:

When installing the Danesmoor Utility or Worcester
Bosch boilers inside the Outdoor Pack only use the Outdoor Pack
instructions, Part Number 8 716 104 871. Discard the
Danesmoor Utility instructions (8 716 104 437) or Worcester
Bosch instructions (8 716 104 438) and the RS short silencer kit
installation instructions, (8 716 104 861).

11.1 After unpacking the boiler it is recommended that all cabinet
panels are removed, as described in Section 5, and stored in a safe
place to avoid damage during installation and allow easy inspection
for any leaks after the system has been filled.

11.2 Remove the burner as described below and store in a safe
place until the appliance is ready for commissioning.

1. Remove the burner plug-in connector by removing the
electrical facia and pulling the three-pin connector free. Slide the
locating bush from the electrical box.

2. Remove the burner from the boiler by slackening the two M6
retaining screws located in the burner housing ring and pulling
the burner clear. This will require the use of a 5mm allen key.

11.3 Outdoor Pack installation.

Before the appliance is fitted to the heating system

flush the system and mains water supply.

1. Carefully place the base in the required position on a flat level

hard standing ensuring the correct orientation. A template is
fastened to the base this indicates the front of the Pack.
NOTE: Carefully place the base in position do not scrape across
the hardstanding.
NOTE: Ensure there is a minimum distance of 30mm from the edge
of the base to the wall of the property to allow assembly of the pack.

2. Fasten the base to the hard standing using four holes provided.
Care should be taken to ensure that the base is level (see Fig.4).

3. Slide the boiler onto the baseplate from the side being careful
not to damage the template or front and rear panel locating tabs.

4. There are two possible positions for each size of boiler. The holes
on the baseplate of the boiler should be lined up with the holes on
the rail of the Outdoor Pack base (see table 9 and Fig.4, 14 and 15).

5. To aid positioning of the boiler insert the M8 bolt provided into the
boiler baseplate and rail of the Outdoor Pack base. Adjust the boiler
to the correct position so the two holes on the boiler baseplate line
up with the two holes on the Outdoor Pack base.

Table 9

open side panel.

7. For ease of installation fix the relevant fittings to the boiler
and plug any unused sockets.

8. Hold the open side panel (with the pipework exit holes) on the
side, which the pipework will be protruding from the boiler.

9. Using the self tapping screws provided screw the pipework
water plates into there required position depending on the
pipework configuration required (see Fig. 16). These plates must
be fitted on the inside of the panel.

Fig. 14. Boiler Position for Pipework Exiting

on the Right Hand Side.

Outdoor
Casing

Front of

Boiler

Closed Side
Panel

Template
Position
A or C

(see table 9)

Boiler positioned on the left hand side to allow the
pipework to exit on the right hand side.

Open

Side

Panel

Fig. 15. Boiler Position for Pipework Exiting

on the Left Hand Side.

Outdoor

Casing

Front of

Boiler

Open
Side
Panel

Boiler positioned on the right hand side to allow the
pipework to exit on the left hand side.

Closed Side

Panel

Template

Position

B or D

(see table 9)

Boiler Marking on Boiler Position Connection of Pipework See

Template inside the Outdoor Pack and Open side panel position Figure

12 to 25 A Left hand side Right hand side 14

(50 to 90)

12 to 25 B Right hand side Left hand side 15

(50 to 90)

26 to 32 C Left hand side Right hand side 14

(90 to 110)

26 to 32 D Right hand side Left hand side 15

(90 to110)

6. The Outdoor Pack can accommodate various pipework
options which include:
(a) 22mm or 28mm pipework.
(b) Flow pipe exiting from the top and the return pipe from

the bottom of the open side panel

(c) Flow and return side panel exiting from the top of the

12. Position and fasten the closed side panel to the brace using two
of the screws provided (see Fig.17).

13. Fasten the side panels to the base using the self tapping
screws provided. Only fasten the side panel to the side using one
fixing at the rear and one at the front (see Fig.17).

15

10. Using the water plates provided

blank off the remaining pipework
options using two of the screws
provided.

11. Fasten the brace to the open side
panel using two of the screws provided
(see Fig.17).

Fig.16. Water Plate Positions. (Panel viewed from inside)

Top of Open Side Panel

N.B. The plates
should be
fastened on the
inside of the open
side panel.

For 26/32 (90/110)
models use the top
holes to fasten

For 12-25 (50-90)

models use the bottom

holes to fasten

Electrical cable entry

N.B. Ensure the

open/close bush is in

position.

Water plate (A)

Water plate (B)

N.B. In this installation the water plates are positioned using the 22mm option with
the pipes exiting in line with the boiler sockets and the pipe work is shown exiting
from the left hand side.

For all models use the

top holes to fasten

16

Fig.17. Assembly of the Base/Side/Rear Panels.

Rear panel

Brace

Open side panel

Closed side panel

Template

Base

17

14. Check the boiler sockets line up with the water plate holes in

the open side panel and make any adjustments required.

15. If positioning the Outdoor Pack next to the wall of the
property proceed as follows; if positioning away from the property
go to 21.

16. Mark the hole centres on the wall of the property for the
flow and return pipes and electrical power supply.

17. Remove the boiler and side panels attached to the brace
from the base taking care not to damage the panels.

18. Drill the required holes through the wall of the property for
the flow and return and the electrical power supply.

19. Reassemble the boiler and side panels/brace and fasten to
the base plate using the self tapping screws provided.

20. Check the boiler sockets line up with the hole positions in
the open side panels and with the wall of the property.

21. Plumb the boiler into the heating system.

22. Fasten the oil pipe plates to the rear panel. The options are

single pipe 10mm and 12mm, two pipe 10mm and 12mm and
fully blanked off. Choose the option required and screw the
remaining oil pipe plate to the rear panel in the blanked off
option (see Fig. 4, 18 and 19).

23. Insert the fire valve phial through the rear panel and clip the
phial to the fire valve clip on the boiler electrical control box.
Fasten the fire valve blanking plate to the rear panel making
sure the capillary is not damaged (see Fig. 4,18 and 20).

24. Fasten the remaining blanking plates to the rear panel in the
closed position to prevent water ingress.

25. Locate the rear panel in position ensuring the rear slots are
located with the tabs on the base and fasten to the side panels
using to the two self tapping screws provided (see Fig.17).

26. Fasten the rear panel bracket strip to the rear panel and fully
tighten (see Fig.18)

27. Fasten the top panel bracket to the top panel and fully
tighten with two of the screws provided (See Fig.21)

11.4 Flue Terminal Installation

Install the appliance flue system as described in Section 7.

NOTE: Only use the RS short silencer, Part Number 7 716 190 002

1. Undo the three screws holding the flue spigot and gasket.

2. Undo the three nuts holding the rear flue blanking plate in position.

3. Remove the blanking plate and gasket.

4. Press out and discard the central portion of the gasket.

5. Position the following components onto the boiler flue outlet plate

in the following order: gasket, silencer bracket, gasket and clamping
collar and secure with the three nuts/washers as shown in Fig.22.

6. Fit the locking band by sliding over the clamping collar
ensuring that the screw head is pointing upwards to allow easy
access when tightening. Tighten the locking band screw
sufficiently to prevent it slipping out of position. Do not
overtighten at this stage as this will make it difficult to insert the
flue terminal.

7. Fasten the rear silencer outlet plate to the inside of the rear
panel using the four screws provided to the desired position
checking that the clamping collar is central to the exit of the
silencer outlet plate, do not tighten as shown in Fig.18.

11.5 Mount the terminal

1. Place a fillet of fire cement or silicone sealant around the

inside of the clamping collar (see Fig.23).

2. Push the terminal through the hole in the rear panel. Ensure
the terminal is the correct way up such that the louvers are
pointing downwards and the drain holes are on the underside.

3. Insert the terminal spigot into the clamping collar.

4. Fasten the flue terminal to the silencer bracket using the four

No.6 self tapping screws provided within the RS short silencer kit.

5. Fully tighten the clamping collar.

6. Smooth the fire cement/silicone sealant around the inside of

the clamping collar to form a good seal and remove any surplus.

7. Check the insulation jacket on the rear of the boiler does not
block the air inlet channels below the flue terminal. There should
be at least 10mm clearance between the bottom of the terminal
and the insulation jacket. If there is not sufficient clearance cut
around the insulation jacket ensuring 10mm clearance.

8. Blank the top flue hole using the blanking disc as shown in Fig.24.

9. Fully tighten the flue silencer outlet plate to the rear panel.

10. Place a fillet of silicone sealant around the flue terminal to

prevent water entering the rear panel (see Fig.26).

11.6 Flue Terminal Guard Installation

Attach the Outdoor Pack top panel to the Outdoor Pack

1.

ensuring the rear panel bracket locks the the rear of the top
panel in position as shown in Fig.25.

2. Position the flue guard (Part No 7 716 190 009) with the locating
eyes to the side of the flue terminal and positioned centrally to the
flue terminal.

3. Position the flue guard so there is a 1mm gap between the
edge of the flue guard and the underneath of the top panel to
allow easy removal.

4. Mark centrally in the four locating eyes (A) and using a 6mm
drill bit; drill through the rear panel.

5. Remove the top panel and fasten the flue guard to the rear
panel using the M5, bolts and washers provided.

6. Check the top panel can be fitted and make any necessary adjustments.

11.7 Mounting of the Outdoor Pack Electrical Control Box

1. Replace the electrical control panel to the boiler as described

in Section 5.

2. Pull the thermostat knob forwards to remove from its spindle.

3. Undo the facia retaining screw and remove the plate.

4. Undo the wing nut on the underside of the boiler control box.

5. Fasten the Outdoor Pack control box top to the underside of

the support bracket using the wing nut as shown in Fig.27.

6. Using the clamp and the two screws provided fasten the outdoor
control box top to the support bracket as shown in Fig.27.

7. Feed the four core cable through the hole half way down the
open side panel; route between the boiler white casing and the
insulation jacket avoiding contact with hot surfaces.
NOTE: Make sure the plastic open/close bush is fixed in place to
the open side panel as this will protect the cable from the edge
of the open side panel.

8. Connect the mains supply four core cable to the outdoor
electrical control box as described in Section 10.3.

9. Push the Outdoor Pack control box into the control box top
ensuring the switch is facing the front of the appliance and
fasten using four screws provided.

10. Using the three core cable supplied connect to the boiler on
the terminal strip as described in Section 10.3.

11. Gently clip the frost thermostat phial into the tool clip
provided being careful not to kink or damage the capillary.

11.8 Heating system installation.
Before the appliance is fitted to the heating system

flush the system and mains water supply.

1. If not done previously plumb the boiler into the central

heating system.

Note: Drain cocks should be fitted on the lowest point on the
system to allow draining of the appliance and system.

2. Check that all unused sockets have been plugged.

3. Fill the system and vent all radiators and high points to

remove air from the system.

4. Check the boiler and all pipework connections for leaks.

5. The primary system should be flushed and treated in

accordance with the recommendations of BS 7593.

Note: Place a fillet of sealant around all pipework and the 4
core cable entering the Outdoor Pack to prevent water ingress.

11.9 Oil supply installation (see Figs. 6 to 7).

Note: Never route the oil supply pipe/hose directly below the
combustion chamber base.

1.

Fit the oil supply pipe as described in Section 8. Route the
pipework though the Outdoor Pack rear panel and down either side
of the boiler in the gap between the base tray and the boiler shell.

Note: Never use soldered joints on oil supply pipes as this
could cause a hazard in the case of a fire.

2. Fit an isolating valve at the end of the oil line close to the

burner and ensure that the valve is closed.

18

3. Open the main oil supply valve at the tank and check for any leaks.

4. Place a suitable container below the bulkhead fitting and

open the valve.

5. Draw off at least 2.5 litres of oil until a steady flow of clear
uncontaminated oil can be seen and turn off the isolating valve.

Note: This method may not be possible on some installations
where a sub-gravity system is used. Where this problem arises
bleed the system using the oil pump as described in Section 12

Fig.18. Rear Panel Assembly.

N.B. The silencer outlet
plate can be fitted in two
positions, depending on
the boiler position within
the Outdoor Pack.

Choose the option
which lines the silencer
outlet plate hole
centrally with the
clamping collar on the
back of the boiler.

and remove and clean the oil pump filter to remove any debris
collected as a result of installation.

11.6 Replace the electrical control panel and boiler side panels
in reverse order to the removal procedure of Section 5 and
connect the electrical supply as described in Section 10.

Silencer outlet plate

Rear panel bracket

Rear panel

Fig.19. Oil Plate Fixing Hole Positions.

10mm two pipe option

12mm
two pipe
option

Blanked off

option

Fire valve entry

Oil pipe entry

N.B. To prevent water ingress
blank off options not required.

Fig.20. Fire Valve Plate.

12mm

single pipe

option

10mm single pipe option

19

Fig.21. Fastening the Top panel Bracket to the Top Panel

Top panel bracket

(under side)

Fig.22. Flue Terminal Assembly.

Top Panel

locking band

Flue terminal

Fig. 23. Rear Flue Outlet Seal.

Clamping collar

Nut

Silencer bracket

Gasket

Gasket

No.6 screws supplied with

RS Short Silencer Kit

Fig. 24. Flue Blanking Arrangement.

Fixing screws

Flue outlet plate

Top flue blanking plate

Form a bead of fire
cement or silicone sealant
around the collar before
inserting the flue terminal.

Gasket

20

Fig.25. Assembling Top panel to the Outdoor Pack.

Top panel

Brace

(a) Fitting of the top panel

Fig.26. Flue Guard Position.

N.B. Ensure that there
is a 1mm gap between
the top of the flue guard
and top panel.

Locating eyes

A

Seal around the top

and sides of the flue

terminal to prevent

water ingress.

Rear panel bracket

Fasten the top panel to the brace using two of
the screws provided.

(b) Top panel in position

A

A

Rear panel

A

Locating eyes

A: Fixing points for flue terminal guard.

Fig.27. Outdoor Pack Control Box Assembly .

Outdoor control box
top

Flue terminal position

Clamp

Support bracket

Wing nut

Outdoor control box

21

12. Commissioning The Appliance

WARNING: This appliance is serviced and repaired externally.
External equipment operated at 230volts should not be
serviced or repaired under adverse weather conditions.

NOTE: The Outdoor Pack is not load bearing, it only provides
weather proofing for the boiler inside.

Ensure that no foreign matter is left in the system as this could
cause damage to the appliance.

12.1 Check that the electrical supply to the appliance is
switched off.

12.2 When commissioning the appliance after initial installation
follow the procedure from 12.3, otherwise remove the burner
first as described in section 14.3.

Benchmark Water Treatment: For optimum performance after
installation, this boiler and its associated central heating
system should be flushed in accordance with the guidelines
given in BS7593:1992 - Treatment of water in domestic hot
water systems. Full instructions are supplied with proprietary
cleansers sold for this purpose. If an inhibitor is to be used
after flushing, it should be used in accordance with the
inhibitor manufacturers instructions.
Suitable flushing agents and inhibitors are available from Betz
Dearborn Tel: [phone] and Fernox Tel: [phone].
Instructions for use are supplied with these products.

IMPORTANT: Any system cleanser must be flushed from the system
before an inhibitor is added.

12.3 Prepare the heating system

1. After initial installation and checking for leaks, as previously

described, drain down the system sufficiently to add a flushing
agent. After flushing drain the system before filling.

2. Refill the system.

12.4 Check the Burner

1.

Check that the nozzle and electrode settings are correct for

the relevant burner. (See Figs. 28, 29, 30 and 31).

2. Check that the nozzle lies central with the combustion head hole.

3. Check for any visible defects.

12.5 Replace the burner

1.

Connect the flexible oil supply hose to the isolating valve and
tighten sufficiently to form a good seal. Where a double pipe
system or a single pipe system with de-aerator is being used fit
the bypass plug, as described in Fig.6, and connect the oil return
flexible hose to the return pipe fitting.

2. With the sponge O-ring gasket around the burner blast tube
insert the burner into the housing tube. Push the burner firmly
forward to compress the gasket and tighten the two locking
screws using a 5mm Allen key.

Note: It is important that a good seal is made between the
burner and the boiler to prevent re-circulation of the flue gases
from the combustion chamber to the burner inlet.

3. Re-connect the electrical lead plug into the control box .

12.6 Check the installation

1. Check that the appliance is correctly wired as described in

Section 10.

2. Check the combustion chamber base insulation board is
positioned correctly in the bottom of the heatexchanger

3. Check that all baffles are correctly located and the heat shield is
correctly mounted (Danesmoor utility 20/25, 26/32, Worcester
Bosch 70/90 and 90/110 models only) as shown in Fig.32.

4. Check that the baffle retainer is correctly mounted
(Danesmoor utility 20/25, 26/32, Worcester Bosch 70/90 and
90/110 models only) as shown in Fig.32.

5. Check that the control thermostat and auto reset high limit

thermostat phials are correctly located in the boiler thermostat
pocket positioned in the top front of the boiler as shown in Fig.3.

6. Check that the manual reset limit thermostat is located in the
steel pocket above the electrical box mounting bracket on the
front face of the boiler as shown in Fig.3.

7. Check the frost thermostat phial is positioned within the
boiler cabinet underneath the outdoor electrical control box.
Locate the phial of the frost thermostat in the clip underneath
the outdoor electrical control box

8. Check that all of the air-ways to the burner are clear of any obstruction.
Note: Check the insulation jacket on the rear of the boiler

does not block the air inlet channels below the flue terminal.
There should be at least 10mm clearance between the
bottom of the terminal and the insulation jacket. If there is
not sufficient clearance cut around the insulation jacket
ensuring 10mm clearance.

Fit a pressure gauge and manifold to the burner pump at the

12.7

point indicated in Fig.8 or the pressure gauge port shown in Fig.
31 on the Danesmoor Utility 20/25 and Worcester Bosch 70/90.

12.8 Turn on the electricity to the appliance from within the
property and set the switch to the ‘Run’ mode on the Outdoor
Pack electrical control box (see Fig.11).

12.9 Bleed the burner.
Single Pipe System

Release the fuel bleed port on the manifold and place a suitable
receptacle beneath. Turn on the boiler thermostat and allow the
burner to run through to lockout. Wait two minutes and reset
the burner control box. Repeat the procedure at least three
times or until a steady stream of oil, without air, is exhausted
from the bleed port. Re-lock the bleed port.

Double Pipe System

A double pipe system will automatically vent the air back to the
oil tank. Turn on the boiler thermostat and allow the burner to
run through to lockout. Wait two minutes and reset the burner
control box. Repeat the procedure until the burner fires and runs
in a steady state. This may take several attempts depending on
the oil pipe length and height.

Single pipe suction lift system with de-aerator

A single pipe suction lift system with de-aerator will automatical­ly vent air through the de-aerator by turning on the boiler ther­mostat and allowing the boiler run to lockout. Wait two minutes
and reset the burner control box. Repeat the procedure until the
burner fires and runs in a steady state.
On long oil pipe runs from the oil tank to the boiler it is recom­mended that the de-aerator be primed to prevent damage to the
oil pump.
To prime the the de-aerator follow the following procedure:

12.10 Adjust the air shutter and pump pressure to the settings
recommended in Tables 2 to 5. After a pre-ignition period of
approximately 15 seconds the burner should ignite. Flame sensing
is carried out by means of a photocell mounted in the burner body.
Should the boiler fail to establish a normal firing pattern (or should
flame failure occur during running), the absence of a flame is
sensed and the control box is monitored to a safe lockout condition
and the boiler is shut down. The lockout indicator light/reset
button in the burner control box will illuminate indicating that the
burner has gone to lockout. In this instance wait two minutes and
press the lockout reset button to initiate another start sequence.
Repeat the procedure until a flame is established.

Note: Persistent lockout when running indicates a fault and a
Service Engineer should be consulted.

12.11 Run the boiler for approximately 3 minutes and switch off
checking that there is no after-spurting from the nozzle. This can
be detected by oil saturation on the blast tube. If after-spurting
occurs remove the burner from the boiler, unscrew the nozzle, and

a) Disconnect the flexible oil inlet hose end nearest the

de-aerator and place in a container of oil.

b) Place an empty container to collect oil from the oil

inlet pipe connection of the de-aerator.

c) Prime the de-aerator and reconnect the de-aerator

to the flexible oil inlet hose.

while holding the burner in a vertical position, fill the nozzle holder
with oil and refit the nozzle. Replace the burner and continue to
run the boiler for three minute periods until after-spurting stops.

Note: In order that after-spurting is reduced to a minimum
during the commissioning period it is recommended that a
pressure gauge only is fitted on the external pressure gauge port
on the Electro Oil B11 (See Fig.30). Use of a “T” piece pressure
gauge manifold will increase the oil line volume and hence
increase the degree of after-spurting.

12.12 Run the boiler for a further 15 minute period and then
finally fine tune the air shutter setting to give the CO2 level
specified in Tables 2 to 5 less 0.5%CO . During this period some
smoke will be emitted due to the burning of the organic binder in
the base insulation board. Smoke readings will therefore be
inaccurate at this point.

Note: A flue gas sampling point is located on the boiler top plate.

12.13 Check that the smoke reading is in the range 0-1. If this

cannot be achieved then check that the burner head is set
correctly and the nozzle is in good condition.

12.14 Check that the flue temperature does not exceed the
value specified in Tables 2 to 5. If this is the case then check that
the baffles are correctly located. If the baffles are correctly
located then reduce the pump pressure since nozzle variations
of up to + or – 15% may occur.

12.15 Remove the oil pressure gauge and manifold and check
all oil system joints for any signs of leakage.

12.16 Allow the burner to run for a further five minutes and
then recheck the CO2 level and adjust the air setting if required.
Check that the smoke number is in the range 0-1. Repeat the fine
tuning procedure if found necessary.

12.17 Refit the boiler cabinet top and front panels in the reverse
order to that described in Section 5.

12.18 When the heating circuit has reached full operating
temperature check the whole system for any leaks.

12.19 Locate and fully tighten the top panel to the brace with
the two screws provided ensuring it sits on the side panels..

12.20 Locate the front panel and tighten to the Outdoor Pack
using the two handwheels provided.

12.21 Locking the Outdoor Pack

Provision has been made to lock the outdoor front panel using a
padlock underneath the front of the top panel. A suitable
padlock is the P73 manufactured by Yale Security Products, or
the use of a Padlock which has 20 to 22 mm between the two
centres on the shackle and 15mm to 20mm between the inside
of the body and the shackle and a shackle diameter of 5mm.

For the Security of the Outdoor Pack ensure the top panel is
siting on the side panels and fully tightened to the brace with the
two screws provided.

Fig. 28. Electro Oil Inter B9A Burner.

(12/14 model)

Combustion Head

2mm

A

10mm

Draught tube

Output Dimension

kW Head Type A

12

PL 6/7/21.5/10-E 3 mm

14 PL 6/7/21.5/10-E 5 mm

To adjust the nozzle position, undo the
locking screw located at the rear of the
nozzle line and rotate the adjusting
disc one turn anti-clockwise to move
forward by 1 mm.

Spark gap
2 -2.5 mm

Nozzle block

Nozzle

Photocell

Adjusting
disc

Pressure Adjustment
Screw

Oil pump

Air control indicator

Air adjustment screw

(4mm hexagonal head)

Combustion head

Transformer

Control box

Lockout reset button

23

Fig. 29. Electro Oil Inter B9B Burner.

Danesmoor Utility (15/19 Model)
Worcester Bosch (50/70 Model)

Combustion Head

All Dimensions are in mm

2mm

A

10mm

Spark gap
2-2.5mm

Photocell

Adjusting
disc

Locking screw

Combustion head

Transformer

Draught tube

Nozzle Nozzle block

To adjust the nozzle position,
undo the locking screw located
at the rear of the nozzle line and

Pressure adjuster

Pressure adjuster
screw

screw

rotate the adjusting disc one
turn anti-clockwise to move
forward by 1mm.

Output Combustion Dimension

kW Btu/hr Head A

15 51,000 PL 6/7/21.5/10 3mm
17 58,000 PL 6/7/21.5/10 5mm
19 65,000 PL 6/7/21.5/10 5mm

Oil pump

Fig. 30. Electro Oil Inter B11 Burner.

Danesmoor Utility (20/25 Model)
Worcester Bosch (70/90 Model)

Combustion Head ­PL 10/4/24/10 x 78mm

All Dimensions are in mm

5mm

1mm

Spark gap
3-3.5mm

Pressure adjuster

Pressure gauge
screw

point

Air control indicator

Air adjustment screw

(4mm hexagonal head)

Photocell

Air adjustment screw

(4mm hexagonal head)

Air control indicator

Pressure
gauge port

Control box

Lockout reset button

Lockout
reset button

8mm

Draught tube

Nozzle Nozzle block

24

Pressure

adjustment

screw

Transformer

Control box

Oil pump

Fig. 31. Electro Oil Sterling Burner.

Danesmoor Utility (26/32 model)
Worcester Bosch (90/110 Model)

Combustion Head - PL 6/7/21.5/10 x 78mm

All Dimensions are in mm

3.5mm

7.5mm

Draught tube

Nozzle Nozzle block

0mm

Spark gap

2.5 – 3.0

Lockout
reset button

Motor

Control

box

Photocell

Transformer

Air adjustment

Air adjustment screw

(4mm hexagonal head)

screw

Combustion head

Air control

indicator

Connecting
pipe

Solenoid

valve

Pressure

Gauge

Port

Pump

Pressure

Adjustment

Screw

Fig. 32. Location of Boiler Flueway Baffles.

(a) Danesmoor Utility 12/14

Baffle

(b) Danesmoor Utility 15/19

Worcester Bosch 50/70

(c) Danesmoor Utility 20/25 and 26/32

Worcester Bosch 70/90 and 90/110

Baffle
retainer

Baffle

Heat
shield

25

13. Instructions To The User

13.1 Hand the Outdoor Pack users instructions (Part
Number: 8 716 102 841) and Benchmark booklet to the user or
purchaser for retention and instruct them in the efficient and safe
operation of the appliance and the heating/hot water system.

13.2 Discard the Danesmoor Utility user instructions (Part
Number: 8 716 145 137) and Worcester Bosch user instructions
(Part Number: 8 716 145 077).

13.2 Advise the user or purchaser of the precautions necessary
to prevent damage to the heating/hot water system and to the
building in the event of the heating system remaining inopera­tive during frost conditions.

13.3 Finally advise the user or purchaser that for continued effi­cient and safe operation of the appliance it is important that ade­quate servicing is carried out by a qualified engineer at least
once per year.
Worcester Heat Systems Limited will be pleased to discuss and
offer a comprehensive maintenance contract.

13.4 Set the system controls to the users requirements.

14. Routine Cleaning And Inspection

WARNING: The appliance is serviced and repaired externally.
External equipment operated at 230volts should not be
serviced or repaired under adverse weather conditions.

14.1

The following should be carried out at least once per year
for 28 second Kerosene to ensure efficient, trouble free
operation.
Note: The service engineer should have access to the property to
check for system faults and reset/replace electrical safety devices.
Note: The service engineer should take any necessary
precautions to protect him/herself and any third party against
hot surfaces on the appliance.
Note: The Outdoor Pack is not load bearing it only provides
weather proofing for the boiler inside.

1. Carry out a pre-service check noting any operational faults.

2. Check and clean the burner.

3. Check and clean the intake grille at the end of the terminal

and remove any debris from around the appliance.

4. Check and clean the baffle retainer (Danesmoor utility 20/25,
26/32, Worcester Bosch 70/90 and 90/110 models only) as
shown in Fig. 32.

5. Check and clean the baffles.

6. Check and clean the heat exchanger surface.

7. Check the heat shield (Danesmoor utility 20/25 and 26/32

and Worcester Bosch 70/90 and 90/110 models only) as shown
in Fig. 32.

8. Check the combustion chamber base insulation board.

9. Check that the flue system is unobstructed and clean as

necessary.

10. Clean all oil filters.
Some of the servicing points are covered more fully in the
following instructions:-

14.2 Pre-Service Check

1.

Remove the Outdoor Pack front and top panels as described

in section 5.

2. Remove the boiler front and top panels as described in section
5 .

3. Operate the appliance and system, noting any faults which
may need to be corrected during the service.

14.3 Cleaning the Burner
IMPORTANT: Disconnect the electrical supply at the mains

before commencing any servicing. Turn off the oil at the service
cock.

1. Remove the burner.
(a) Isolate the oil supply at both the oil tank and the isolating

valve located close to the burner.
(b) Slacken the two M6 burner locking screws, using a 5mm

Allen key, and remove the burner.

2. Clean the fan impeller using the following procedure:

Electro-oil Inter B9 Burner
(a) Remove the two screws holding the combustion head in

position and withdraw the combustion head and air guide collar
(where fitted).
(b) Remove the three remaining screws holding the front cover plate
in position and withdraw the cover to expose the fan impeller.
(c) Clean both sides of the fan impeller and remove any debris
from the burner housing.

(d) Check that the impeller rotates freely.
(e) Clean the air inlet passage and check that the adjustment

mechanism operates freely.

(f) Re-assemble the components.

Electro Oil Inter B11
(a) Remove the acoustic fan inlet cover.
(b) Remove the three screws holding the fan cowl in position and

remove the cowl noting how the fan control flap is positioned

(c)

Check that the air control flap pivots freely and ensure the air

path to the burner head is clear.
(d) Clean both sides of the fan impeller and remove any debris
from the burner housing.

(e) Check that the impeller rotates freely.
(f) Re-assemble the components.

Electro Oil Sterling
(a)

Remove the air adjustment cover.

(b) Separate the main body of the burner from the burner front
by removing the M6 allen screw (located beneath the air
adjustment screw), using a 4mm allen key. Check the condition
of the Gasket between these two parts and replace if necessary.
(c) Note the position of the air damper adjustment and check the
air damper moves freely.

(d) Check the air path to the burner head is clear.
(e) Clean both sides of the fan impeller and remove any debris

from the burner housing.

(f) Check the impeller rotates freely.
(g) Re-assemble the components.

3. Remove the combustion head and thoroughly clean all

deposits.

4. Inspection of Mechanical Shut-off Valve.
a) Remove the nozzle.
b) Fasten an M5 screw, with a minimum length of 30mm, into

the threaded hole (A) and pull the screw to withdraw the check
valve.
c) Check that the nozzle holder is clear of any debris and clean if
necessary.
d) Check that the 3 holes in the check valve are clear of any
debris. Discard the check valve if the holes cannot be cleared or
if the unit is defective and replace with a new one.

e) Replace in the reverse order.

5. It is strongly recommended that the oil atomising nozzle is

replaced at each service. If this is not possible then remove and
clean the integral filter, but under no circumstances should the
nozzle be stripped into its component parts and never attempt
to clean the nozzle tip.

6. Check and reset the electrodes, where necessary, as shown in
Figs. 28, 29, 30 and 31.

7. Replace the combustion head and check that the nozzle lies
central to the combustion head and the head settings are as
shown in Figs. 28, 29, 30 and 31.

8. Withdraw the photocell from its housing and clean.

9. Remove and clean the oil pump internal filter using kerosene

or white spirit. The internal filter is accessed by removing the oil
pump cover on the Danfoss BFP 11 and Suntec AS47C and by
unscrewing and withdrawing the cartridge on the Danfoss BFP
41 as indicated in Fig. 6.

10. It is recommended that the standard flexible oil line is
replaced at each yearly service to prevent the possibility of a
leak due to ageing.

.

26

11. Re-assemble the burner components.

12. Check the sponge O-ring seal located around the combustion

head and replace if necessary. It is imperative that this seal is in
good condition since failure will cause the flue gases to be re­circulated into the burner inlet.

14.4 Remove the paper element from the external oil filter and
replace. If the filter contains a washable element then
thoroughly clean in Kerosene or white spirit and re-assemble
into the filter.

14.5 Clean the Boiler

1. Remove the boiler top access door by releasing the M10 nuts

and check the fibreglass rope seal. Replace the seal if necessary.

2. Remove and check the baffle retainer, where fitted
(Danesmoor utility 20/25, 26/32, Worcester Bosch 70/90 and
90/110 models only) as shown in Fig. 32.

3. Remove the baffles, clean and check their condition. Replace
any baffles considered to be badly corroded.

4. Thoroughly clean all of the heat exchanger surfaces using a
stiff wire brush and vacuum clean all loose debris from the
combustion chamber. Take care not to damage the base
insulation!

8. Remove and check the heat shield where fitted (Danesmoor
utility 20/25, 26/32, Worcester Bosch 70/90 and 90/110
models only) as shown in Fig. 32.

9. Check the combustion chamber base insulation and replace if
there is any sign of damage.

10. Check and clean the flue.

11. Replace the items in reverse order noting the baffle positions

shown in Fig. 32.

14.7 Fire Valve.

Check that a fire valve is fitted to the incoming oil line with the
body located outside the premises and Outdoor Pack and the
detection element located within the appliance case. A fire valve
clip is provided for this purpose as shown in Fig. 3. Test the
operation of the fire valve to ensure that the mechanism
operates and that the oil supply is completely isolated.

14.8 Recommission the Burner.

1.

Connect the flexible oil supply hose to the isolating valve and
tighten sufficiently to form a good seal. Where a double pipe
system is being used connect the oil return flexible hose to
return pipe fitting.

2. With the sponge O-ring gasket around the burner blast tube
insert the burner into the housing tube. Push the burner firmly
forward to compress the gasket and tighten the two locking
screws, using a 5mm Allen key.
Note: It is important that a good seal is made between the
burner and the boiler to prevent recirculation of the flue gases
from the combustion chamber to the burner inlet.

3. Reconnect the electrical lead plug into the control box.

4. Turn on the oil supply at the service cock.

5. Recommission the boiler as described in Section 12.

Fig. 33. Mechanical Shut-off Valve.

Nozzle Assembly

Check ValveCheck Valve

A

27

15. Short Parts List

Part Manufacturers Reference Qty WHS Part No.

Burner for 12/14 Bentone B9A 1 8 716 104 431 0
B9A Combustion Head PL 6/7/21.5/10 E x 78mm 1 8 716 157 041 0
Burner for 15/19 or WB 50/70 Bentone B9B 1 8 716 142 705 0
B9B Combustion Head PL 6/7/21.5/10 x 78mm 1 8 716 156 697 0
Burner for 20/25 or WB 70/90 Bentone B11C 1 8 716 104 432 0
B11C Combustion Head PL 10/4/24/10 x 78mm 1 8 716 142 784 0
Burner for 26/32 or WB 90/110 Bentone Sterling 40 1 8 716 142 700 0
Sterling 40 Combustion Head PL 6/7/21.5/10 x 78mm 1 8 716 156 697 0
Burner Control 1 Control Box Satronic TF 832:3 1 8 716156 648 0
B9 and B11 Photocell Satronic MZ770 1 8 716 142 735 0
Sterling 40 Photocell Satronic MZ770 1 8 716 156 692 0

Control Box Base Satronic S01 S701 1 8 716 142 782 0
Ignition Electrode 18 716 142 752 0
Motor (12/14, 15/19 or WB 50/70) AEG or Simel 70 W 1 8 716 156 597 0
Motor (20/25 or WB 70/90) AEG (FHP) 90 W 1 8 716 142 732 0
Motor (26/32 or WB 90/110) AEG (FHP) 90 W 1 8 716 156 645 0
Oil Pump (12/14, 15/19 or WB 50/70) Danfoss BFP41L3 1 8 716142 743 0
Oil Pump (20/25, 26/32 or WB 70/90, 90/110)
Transformer Danfoss EBI 052F0030 (excludes cable) 1 8 716 156 696 0
Mechanical Shut-off Valve 1 8 716 156 658 0
Flexible Oil Line WHS 1 8 716 156 663 0
Burner 'O' Shaped Gasket WHS 1 8 716 140 902 0
Control Thermostat Seibe K36-P2312 1 8 716 142 309 0
Automatic Reset High Limit Thermostat Seibe LO7-P1022 1 8 716 142 311 0
Manual Reset High Limit Thermostat Seibe LM7-P5075 1 8 716 142 310 0
Frost Thermostat Seibe K36-P1363 1 8 716 142 393 0
Handwheel 28 716 102 555 0
Outdoor Pack Front Panel WHS 1 8 716 102 517 0
Outdoor Pack Top Panel WHS 1 8 716 102 534 0
Outdoor Pack Rear Panel WHS 1 8 716 102 523 0
Outdoor Pack Open Side Panel WHS 1 8 716 102 532 0
Outdoor Pack Closed Side Panel WHS 1 8 716 102 529 0
Outdoor Pack Brace WHS 1 8 716 102 514 0
Outdoor Pack Base WHS 1 8 716 102 500 0

Danfoss BFP11L3 1 8 716 142 736 0

28

LOCKOUT

INDICATED BY RED LAMP ON CONTROL BOX

To Re-set wait 2 minutes and press re-set button

Ignition failure No oil delivery

from nozzle.

Check oil supply

at oil pump.

Air adjustment fault.

CO2 should be

as specified in

tables 2 to 5.

Flame detection fault.

Oil at

oil pump.

No oil at

oil pump.

No oil in tank.

Check tank and

replenish if
necessary.

Filters or oil line

blocked. Check
filters from tank

to boiler and clean

if necessary.

Photocell

filmed over.

Clean.

Photocell

faulty.

Replace.

Faulty control box.

Replace if

necessary.

Nozzle blocked.
Replace nozzle.

Faulty pump or

faulty pump drive.

Replace if necessary.

Air in pump.

Bleed pump.

IGNITION FAILURE

BURNER FAILS TO START PULSATION ON START

Control box fault.

Replace if necessary.

Burner motor fails

to operate.

Check motor across

mains supply.

Bad electrical

connection.

Intermittent flame

detection fault.

See flame detection

fault.

Pulsation

on start.

Check control box

connections.

Electrode

settings

incorrect.

See installation

instructions.

Faulty ignition

transformer.

Replace

if necessary.

Open circuit

ignition.

Electrical connections

not properly

made in

control box.

Faulty control box.

Replace control box.

Electrodes

broken.

High tension

leads faulty.

Boiler does not respond to a call for heat.

Boiler thermostat

faulty. Check by

linking out high

limit and control

thermostats.

Programmer
open circuit.

Faulty control
box. Replace

if necessary.

Combustion

settings

incorrect.

Set up as in

installation

instructions.

Faulty nozzle.

Replace nozzle.

HIGH SMOKE NUMBER

Faulty nozzle.

Replace nozzle.

Incorrect combustion
settings. Readjust as in
installation instructions.

Oil pressure incorrect.

Adjust to recommended

pressure settings.

Ta rget wall incorrectly

positioned or faulty

(where fitted).

Air intake blocked.

Check air intake is clear.

Incorrect components

used on combustion

head. Check with installation

instructions.

OIL SMELLS

Oil soaked hearth. Odour near cabinet.

Faulty burner

operation.

Numerous lockouts.

Cure the lockout

condition.

Oil leaks pipe fittings.

Ta ke apart and

remake if necessary.

Leaks at tubing connectors.

Ensure end of

tubing is secure.

FAULTY BOILER OPERATION

Worn motor bearings.

Replace motor.

Noisy operation.

Fan out of balance.

Replace fan.

Pump noise.

Air in pump.

Worn pump.

Replace.

Boiling.

Short cycling.

Faulty boiler thermostat.

Replace if necessary.

Short circuit boiler thermostat.

Ta ke out of circuit to check.

Thermostat bulb not fully

home in pocket.

Ensure bulb is

pushed fully home.

External controls not

operating correctly.

Boiler thermostat

differential incorrect.

Should be 5°C ± 2°C.

Boiler rating incorrect.

If overrated heat load
satisfied very quickly.

Outdoor control

box set to

‘Service’ mode.

Switch to ‘Run’

mode.

Intermittent

lockout.

No oil passing

through fire valve.

Check correct

valve is fitted or

replace if

necessary.

Faulty mechanical

shut off valve.

Clean or replace.

16. Fault Finding

29

30

31

Worcester Heat Systems Limited (Bosch Group), Cotswold Way, Warndon, Worcester, WR4 9SW.

Telephone: [phone]. Fax: [phone].

Technical Helpline: 08705 266241.

www.worcester-bosch.co.uk

This booklet is accurate at the date of printing but will be superseded and should be disregarded if specifications and/or appearances are changed in the interests

of continued improvement.

All goods sold are subject to our official Conditions of Sale, a copy of which may be obtained on application.

8 716 104 781b 06/03