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14.1 

The following should be carried out at least once per year

for 28 second Kerosene and twice per year for 35 second Gas Oil,
to ensure efficient, trouble free operation.

1. 

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

2. 

Check and clean the burner.

3. 

Check  and  clean  the  air  intake  grille  located  in  the  boiler

room.

4. 

Check  and  clean  the  baffle  retainer  (70/90  and  90/110

models only).

5. 

Check and clean the baffles.

6. 

Check and clean the heat exchanger surface.

7. 

Check the heat shield (on 70/90 and 90/110 models only).

8. 

Check the combustion chamber base insulation board.

9. 

Check  that  the  flue  system  is  unobstructed  and  clean  as

necessary.

11. 

If the appliance has been installed in a compartment check

that the ventilation areas are clear.

12. 

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  cabinet  front  and  top  panels  as  described  in

section 5 .

2. 

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  the  valve  located  close  to  the

burner.

(b) Slacken the two burner locking screws, remove the burner,

and carefully place on the floor.

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.

(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 40

(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 5mm allen key.

(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. 13, 14 and 15.

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. 13, 14 and 15.

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.

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 leak into
the room.

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 two M10

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

14. Routine Cleaning And Inspection

16

Fig. 17. Mechanical Shut-off Valve.

Check Valve

Check Valve

Nozzle Assembly

A

Содержание 70/90

Страница 1: ... 70 90 90 110 FLOOR STANDING OIL FIRED PRESSURE JET APPLIANCES INSTALLATION AND SERVICING INSTRUCTIONS THESE INSTRUCTIONS ARE TO BE LEFT WITH THE APPLIANCE This appliance must be installed and serviced by a competent person ...

Страница 2: ...r company bye laws The Control of Pollution Oil Regulations 1 6 To ensure that the installation will perform to the highest standards the system and components should conform to those mentioned in the instructions 2 1 The Worcester Bosch range of appliances covered in these instructions have been designed to serve domestic central heating and hot water requirements ranging from 15 kW to 32 kW 51 0...

Страница 3: ...e 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 CO2 value 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...

Страница 4: ...t phial Burner locking screw Burner seal gasket Side panel locking screw A Burner Optional pump location Manual reset overheat thermostat Strain relief bush Burner plug in connector High limit thermostat Fire valve clip Side panel Top panel Front panel Thermostat knob Control thermostat phial Phial retaining plug Split pin ...

Страница 5: ... compartment two air vents are required one at high level and one at low level The minimum free area of each vent is given in Table 6 and depends whether the air is taken from another room or from outside the building Where the air is taken from another room that room must contain an air inlet as described in 6 1 6 3 There must be sufficient clearance around the appliance to allow proper circulati...

Страница 6: ...ee Fig 5 for flue terminating positions 80 min Flue guard 766 L F F K G A E B C D H J N O M Minimum Distance mm Terminal Position Open Low Level Flue Discharge A Directly below an opening air brick window etc Not allowed 600 B Horizontally to an opening air brick window etc Not allowed 600 C Below a gutter or sanitary pipe Not allowed 75 D Below eaves or a balcony Not allowed 600 E From vertical s...

Страница 7: ... of a capillary type valve will allow a neat and simple installation A suitable valve is the KBB manufactured by Teddington Controls Limited A spring clip has been provided behind the electrical panel shown in Fig 2 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 th...

Страница 8: ...stem installation should be carried out in accordance with BS 5449 Part 1 1 Feed and Expansion System The feed and expansion pipes must rise continuously from the appliance and must be of the minimum diameter shown in Figs 8 and 9 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 2 Filling and Venting Air in the appli...

Страница 9: ... and expansion tank N B A drain cock should be installed at the lowest point of the heating circuit Domestic hot water cylinder S H S H Fig 9 Typical Open Vent Fully Pumped System Honeywell Y plan Feed and Vent Cistern Diverting valve Boiler Pump Radiator S H Minimum static head 1m 3ft measured from the top surface of the appliance or highest point in the heating system to the water level in the f...

Страница 10: ...ntrol of the central heating and hot water However it must be noted that the programmer used must be suitable for gravity feed applications when used as shown in Figs 11 and 12 such that the hot water channel is always on when the central heating channel is on otherwise the boiler will not fire when there is a central heating demand 10 5 Safety Check In the event of an electrical fault after the i...

Страница 11: ...230 240V 50Hz Time clock programmer Central heating Room thermostat Circulating pump N N L E 3 Hot water 5 Amp Control box connector block Double outlet frost thermostat Mains supply 230 240V 50Hz Time clock programmer Central heating Room thermostat Cylinder thermostat Circulating pump N N L C NO NC E 3 Hot water 5 Amp ...

Страница 12: ...rom 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 1992 11 5 Oil supply installation See Fig 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 The pipe can be routed down either side of th...

Страница 13: ...at 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 12 10 Adjust the air shutter and pump pressure to the settings recommended in Tables 2 to 4 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 Shoul...

Страница 14: ... PL 6 7 21 5 10 x 78 mm 5 mm 19 PL 6 7 21 5 10 x 78 mm 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 Fig 14 Electro Oil Inter B11 Burner 70 90 Model Combustion Head Air control indicator Photocell Air adjustment screw 4 mm hexagonal head Transformer Control box Oil pump ...

Страница 15: ...east 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 13 Instructions To The User 15 Fig 16 Location of Boiler Flueway Baffles a 50 70 ENSURE THAT ALL BAFFLES ARE FIRMLY SEATED IN POSITION BAFFLE RETAINER BAFFLE HEATSHIELD b 70 90 and 90 110 Fig 15 Electro Oil Sterling 40 Bu...

Страница 16: ...eparate the main body of the burner from the burner front by removing the M6 allen screw located beneath the air adjustment screw using a 5mm allen key 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 rotate...

Страница 17: ...tions shown in Fig 16 14 6 Check that a fire valve is fitted to the incoming oil line with the body located outside the premises and the detection element located within the appliance case A fire valve clip is provided for this purpose as shown in Fig 2 test the operation of the fire valve to ensure that the mechanism operates and that the oil supply is completely isolated 14 7 Recommission the Bu...

Страница 18: ...ension 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 Flue draught incorrect Check flue draught Combustion settings incorrect Set up as in installation instructions Faulty nozzle Replace nozzle HIGH SMOKE NUMBER Faulty nozzle Replace nozzle Incor...

Страница 19: ...19 NOTES ...

Страница 20: ...earances 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 8 716 145 074f 05 01 Worcester Heat Systems Limited Cotswold Way Warndon Worcester WR4 9SW Telephone 01905 754624 Fax 01905 754619 www worcester bosch co uk ...

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