Glow-worm SwiftFlow 120 Servicing Instructions Download Page 1

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Supplied By www.heating spares.co Tel. 0161 620 6677

221045A.05.97

Servicing Instructions

120

G.C. No. 47 313 13

One Contact Total Service

Hepworth Heating Ltd.,

Nottingham Road, Belper, Derbyshire. DE56 1JT

General/Sales enquiries:

Tel: (01773) 824141 Fax: (01773) 820569

Fanned Flue Combination Boiler

This is a Cat I

appliance

Customer Services:

Tel: (01773) 828100

Fax: (01773) 828070

To b e l e f t w i t h t h e u s e r

4559

Summary of Contents for SwiftFlow 120

Page 1: ...13 One Contact Total Service Hepworth Heating Ltd Nottingham Road Belper Derbyshire DE56 1JT General Sales enquiries Tel 01773 824141 Fax 01773 820569 Fanned Flue Combination Boiler This is a Cat I 2...

Page 2: ...f the Laws of the Member States relating to appliances burning gaseous fuels 2 Directive 73 23 EEC on the harmonization of the Laws of the Member States relating to electrical equipment designed for u...

Page 3: ...four screws see diagram 1 3 1 6 System Pressures and Draining WARNING All parts containing water of the central heating circuit within the boiler are under the system pressure Before any parts of this...

Page 4: ...Remove the fan securing screws Pull the fan forwards at the bottom and rotate to disengage the fan outlet to flue elbow and rear bracket Take care not to damage the seal Tilt the fan and withdraw Rem...

Page 5: ...ct the condition of all seals and joints renewing them as necessary Check the condition of the combustion chamber insulation Check that the spark gap is as shown in diagram 2 1 2 7 Note Reassembly Mak...

Page 6: ...s co Tel 0161 620 6677 6 221045A 2 S e r v i c i n g Diagram 2 5 STEP 1 STEP 3 STEP 2 STEP 4 SECURING SCREW WING NUT BURNER BRACKET WING NUT BURNER BRACKET BURNER GUIDE BURNER SIDE GUIDES MAIN INJECTO...

Page 7: ...al heating selector switched Off see diagram 3 2 check that the domestic water supply is available and water flows freely from the hot taps Close the taps 7 With the boiler central heating selector sw...

Page 8: ...piezo unit button is there a spark across electrode gap Undo tubing nut at pilot outlet of mulitfunctional control Press multifunctional control knob Does gas flow freely Rectify blockage in pilot inj...

Page 9: ...Test continuity of thermocouple between inner connection point D and point E Is there continuity Thermocouple and boiler overheat circuit satisfactory Faulty cutoff connectors into multifunctional co...

Page 10: ...utlined in a Multimeter Instruction book are the first checks to be carried out during a fault finding procedure Isolate the boiler from the electrical supply refer to Section 1 3 Gain access to the b...

Page 11: ...ULTIFUNCTIONAL CONTROL SOLENOID DHW CUT OFF CONTROL WATER PRESSURE SWITCH SHOWN IN PRESSURISED STATE 240V 26V TRANS FORMER TO REMOTE HEATING CONTROL 5 WAY PLUG SOCKET DHW FLOW SWITCH SELECTOR SWITCH C...

Page 12: ...that the remote controls are not calling for duty and there is no domestic hot water demand Replace CN6 With no demand to the boiler Restore power Does the mains Orange LED come on Does the boiler lig...

Page 13: ...Faulty APS Replace NO YES Isolate supply Reconnect CN6 restore power supply YES Faulty main PCB Replace NO YES YES NO Open DHW tap at full rate Does burner pressure go to 13 1mb YES Is the burner pres...

Page 14: ...the resistance between 8K and 11K Faulty flow switch Replace NO YES Turn the DHW flow off Turn on the CH Does pump run Faulty main PCB Replace YES Faulty DHW O H stat Replace Is there continuity acro...

Page 15: ...er if no central heating refer to main fault finding YES Isolate the boiler from electrical supply remove outer case YES Diagram 3 9 DIGITAL CLOCK TIMER STYLE 1 and 2 FAULT FINDING ELECTRO MECHANICAL...

Page 16: ...4 2 Main Burner Refer to the appropriate parts of Section 2 2 Note There is no need to remove the fan or flue collector assemblies 4 3 Main Injector Refer to the appropriate parts of Section 2 2 Note...

Page 17: ...ctors from the multifunctional control see diagram 4 2 Remove the boiler overheat cutoff secured with two screws see diagram 4 2 Use the heat sink compound supplied between the mounting plate and the...

Page 18: ...ection 11 10 in the Installation Instructions Note Should the pump fail to operate refer to diagram 3 8 If all is in order but the pump still does not operate remove the end screw see diagram 4 5 then...

Page 19: ...mbly as shown in diagram 4 1 Lift the control housing cover to gain access to the board Disconnect all multipin connectors see diagram 4 8 Remove the control board from the support posts To reconnect...

Page 20: ...ove the control housing cover and disconnect the electrical connectors from the transformer see diagram 4 8 Remove the transformer securing screws 2 off from beneath the control housing remove the tra...

Page 21: ...ANENT MAINS SUPPLY FUSED AT 3A CHASSIS EARTH PUMP 1 2 N L v gry r screened screened r w gry b y g p r w gry b y g p p p g y b br r r bk L N g y or y p gry w g y g y CN1 CN7 CN6 CN3 CN4 CN5 N L N L 230...

Page 22: ...Control Remove the four left hand extended hexagon screws from the multifunctional control Discard the O rings and fit the new ones supplied Check and adjust the main burner gas pressure in both the...

Page 23: ...ntrol air ratio unit assembly need not be removed Isolate the domestic hot water inlet and drain refer to Sections 1 3 and 1 6 When replacing the flow switch it is recommended that the water inlet fil...

Page 24: ...rmistor complete with its O ring The polarity of the electrical connections is not important 4 20 Safety Valve Release the water pressure and drain the central heating circuit of the boiler refer to S...

Page 25: ...t water circuits refer to Section 1 3 and 1 6 Remove the fan from the flue collector refer to Section 2 2 Remove the flue collector refer to Section 2 2 Remove the main burner refer to Section 2 2 Rem...

Page 26: ...ont insulation secured with a clip see diagram 4 20 Slide out both side insulation pieces Remove the burner as in Section 2 2 Pull the lower rear insulation forward then slide the upper rear insulatio...

Page 27: ...nion nuts at the front of the isolating valves see diagram 1 1 Disconnect the gas service cock union Disconnect the safety valve discharge pipe from the boiler see diagram 1 1 Separate the two parts o...

Page 28: ...tubes from the switch Remove the air pressure switch secured with two screws When replacing the tubes to the air pressure switch make sure that the forward clear tube from the air pressure switch con...

Page 29: ...d Digital clock timer Style 2 Release the mounting bracket securing screws see diagram 4 26 Disconnect electrical cables release securing clip to remove the clock timer and spacer see diagram 4 27 Dia...

Page 30: ...56 6 202435 Thermocouple 378 204 7 432869 Boiler over heat cut off assy 376 988 8 432868 DHW high limit control assy 313 024 9 900501 Piezo unit 382 585 9 900501 Piezo unit 384 146 10 800134 Pressure...

Page 31: ...Supplied By www heating spares co Tel 0161 620 6677 31 221045A Diagram 5 1 9 20 23 19 11 10 22 18 2 21 14 26 24 15 6 16 12 5 3 4 8 7 13 17A 17B 5 S p a r e P a r t s 1 4610...

Page 32: ...us to health The adhesives and sealants used in this appliance are cured and give no known hazard in this state INSULATION PADS CERAMIC FIBRE These can cause irritation to skin eyes and the respirator...

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