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23

2000225116B

IMPORTANT. On completion of the Fault Finding task which has required the breaking and remaking of the electrical connections,
the continuity, polarity, short circuit and resistance to earth checks must be repeated using a suitable multimeter.

WARNING. The multifunctional control and fan operate on mains voltage, the terminal will be live.

Diagram 9.1

ELECTRICAL FAULT FINDING

12062

9  Fault  Finding

Diagram 8.12

ELECTRODE

0000

SECURING
SCREW

+

-

SPARK GAP
= 3.6    1.1

Diagram 8.11

BURNER
INJECTOR

GRAPHITE
COATED
NUT(2)

0939

8  Servicing

No

No

No

Before carrying out fault finding, ensure that gas, electricity and water are available to the boiler.    
Ensure that any external controls are calling for heat and circuit water is cold.  
If Reset LED is lit - check water system for overheating, reset by turning temperature control knob 
off and on.  If the LED coding is showing an ignition failure, reset the boiler by turning the control 
knob off and on.  Do not operate the boiler without combustion chamber front fitted.

Control Knob at '0'

Apply heating demand
(turn potentiometer clockwise)

Power ON at isolation switch

Does the fan run for 10 seconds with RESET LED lit

Replace fuse

Does the unit begin to spark

Replace PCB

Does the fan start

Is there an LED sequence

Turn Gas ON

Is there an LED sequence

Is the Gas turned ON

Replace PCB

Replace PCB

Correct Operation

Does the burner light

Refer to table

Refer to table

Switch OFF
Remake connections
Restart diagnosis

Are the HT & Earth
connections made

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

No

No

Refer to table

Yes

Yes

Yes

Yes

No

No

No

Summary of Contents for BFF100

Page 1: ...t of the appliance and must to comply with the current issue of the Gas Safety Installation and Use Regulations be handed to the user on completion of the installation To b e l e f t w i t h t h e u s...

Page 2: ...provide information on substances hazardous to health Ceramic fibre Insulation Pads Glassyarn These can cause irritation to skin eyes and the respiratory tract If you have a history of skin complaint...

Page 3: ...atregularintervals Thefrequencyofservicingwilldependupon the particular installation conditions and usage but in general once a year should be enough It is the law that servicing must be carried out...

Page 4: ...emote control Note If the boiler is turned OFF at the boiler temperature control wait at least 30 seconds before switching on again When the boiler switches off the burner will go out The automatic li...

Page 5: ...h the rules in force In GB the installation of the boiler must be carried out by a competent person as described in the following regulations The manufacturer s instructions supplied The Gas Safety In...

Page 6: ...st be correctly earthed polarised and in accordance with the relevant standards In GB this is BS 6891 In IE this is the current edition of I S 813 Domestic Gas Installations Connection of the boiler a...

Page 7: ...rtment A compartment used to enclose the boiler must be designed and constructed specifically for this purpose An existing cupboard or compartment modified for the purpose may be used Details of essen...

Page 8: ...unnecessarily high when the central heating pump is off The domestic primary flow and return must be 28mm o d The installation must comply with the current issue of BS5546 and BS6700 see diagram 2 1 I...

Page 9: ...e roof Care is required to protect the roof if it is made of plastic sheeting If the car port consists of a roof and two or more walls seek advice from the local gas company before installing the boil...

Page 10: ...optional wall liner kit part no 900862 is available complete with instructions All flue assemblies are designed for internal installation Make sure that the ductings do not slope down towards the boi...

Page 11: ...screw but do not tighten see diagram 4 5 NOTE The restrictor is fitted to the BFF100 Only Engage the terminal restrictor on the flue terminal by hooking it over the terminal end and engaging the clam...

Page 12: ...of the remaining lower connections may be used for the gravity domestic hot water return Fit plugs into any unused boiler tappings 4 7 Water Connections Fully Pumped Systems Fit suitable fittings into...

Page 13: ...ure with retaining wire 4 9 Pipework It is essential that any pipework or fittings do not project more than shown in diagram 4 10 Do not route any pipework water or gas across the front of the combust...

Page 14: ...ctory with the control box and heat shield fitted in the lower casing height position 9863 SIDE CASINGS FITTING Diagram 4 13 MAX SIDE CASING R H MIN BOILER PLINTH FRONT CASING BRACKET No 8 SCREW 4 LOC...

Page 15: ...e boiler using the self tapping screws provided see diagram 4 3 IMPORTANT WithregardstotheManualHandlingOperations 1992 Regulations the following operation exceeds the recommended weight for one man l...

Page 16: ...Make the gas connection to the service cock at the lower left hand side of the boiler see diagram 1 1 The whole of the gas installation including the meter should be inspected tested for soundness and...

Page 17: ...Make sure the cable is suitably secured When making connections make sure that the earth conductor ismadeofagreaterlength thanthecurrentcarryingconductors so that if the cable is strained the earth c...

Page 18: ...iagram 6 1 BOILER COMPONENTS 10052 A CONTROL BOX B PHIAL POCKET C GAS SERVICE COCK D BURNER ON NEON E RESET NEON F TEMPERATURE CONTROL G BURNER PRESSURE TEST POINT H GAS PRESSURE ADJUSTMENT SCREW J DA...

Page 19: ...has lit making sure that all other gas burning appliances and pilot lights are off Gas rate Buckingham 4 BFF100 3 3m3 h 115ft3 h Buckingham 4 BFF115 3 8m3 h 136ft3 h is for guidance only dependent on...

Page 20: ...te on mains voltage terminals will become live Switch on the electrical supply and gas supply then operate the boiler On completion of the test switch off the electrical supply and gas supply remove a...

Page 21: ...g back to disengage the retaining lugs then lift up When replacing the flue hood ensure that it rests on the guides and that the rear of flue hood is located under the pegs at the rear and pushed down...

Page 22: ...levant instructions in sections 8 3 and 8 4 8 3 Burners and Injectors Remove the screws and nuts securing the burner support bracket to the combustion chamber cover see diagram 8 9 Remove the graphite...

Page 23: ...re calling for heat and circuit water is cold If Reset LED is lit check water system for overheating reset by turning temperature control knob off and on If the LED coding is showing an ignition failu...

Page 24: ...cause the burner to go out Operationwillnormallyresumeontherestorationoftheelectrical supply Iftheburnerdoesnotrelightafteranelectricalsupplyfailureand theredneononthecontrolpanelislit turntheburnerte...

Page 25: ...SSURE SWITCH 3 15A FUSE BURNER LIT INDICATOR RESET INDICATOR JUMPER POSITION p bk bk w bk bk b r g bk b LS LIVE Switched N LS N g y g y g y br b b br BROWN b BLUE g y GREEN YELLOW g GREY KEY g y NEUTR...

Page 26: ...uring screws two on control box two on the heat shield and lift off see diagram 10 1 Carefully pull the boiler temperature control knob away from the P C B CONTROL BOX COVER CONTROL BOX SECURING SCREW...

Page 27: ...ed with the clear tube from the air pressure switch to the front fan connection as shown in diagram 10 5 and the electricalconnectionsaremadeasshowninwiringdiagram9 4 10 9 Fan Refer to the relevant pa...

Page 28: ...d the description from the list together with the model name and serial number information from the data label The data label is positioned on the heat shield see diagram 6 1 Key No Part No Descriptio...

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