Glow worm Hideaway 120 - Direct Heating Spares
Contents
1. Gio vom T Instructions for Use Installation and Servicing To beleftwiththe user 1369 Hideaway 120 G C No 41 313 29 Open Flue Boiler C benchmark gt Y J 896332 BS 5258 This is a Cat I Appliance Reference in these instructions to British Standards and Statutory Regulations Requirements apply only to the United Kingdom For Ireland the rules in force must be used The instructions consist of three parts User Installation and Servicing Instructions which includes the Guarantee Registration Card The instructions are an integral part 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 Guarantee Registration Thank you for installing a new Glow worm appliance in your home Glow worm appliances are manufactured to the very highest standard so we are pleased to offer our customers a Comprehensive First Year Guarantee In the center pages are to be found your Guarantee Registration Card which we recommend you complete and return as soon as possible If this card is missing you can obtain a copy or record your registration by telephoning the Heatcall Customer Service number 01773 828100 Our Guarantee gives you peace of mind plus valuable protection against breakdown by covering the cost of All replacement parts REGISTER YOUR GLOW WORM APPLIANCE W All2. a minimum static head of 1 metre 39in must be provided between the water level in the cold water cistern and the centre of the waterway see diagram 2 2 2 5 Circulation Pump Normally the pump should be set to give atemperature difference of 11 C 20 F across the boiler Atthe appropriate flow rate the resistance through the boiler can be found by reference to the pressure loss graph diagram 2 3 Use a pump with integral valves or fit valves as close to the pump as possible 2 6 Domestic Hot Water Cylinder For all systems supplying domestic hot water the cylinder must be indirect 2 7 Safety Valve A safety valve need not be fitted to an open vented system 2 8 Draining Tap A drain tap must be fitted at the lowest points of the system which will allow the draining of the entire system including the boiler and domestic hot water cylinder Draining taps should be to the current issue of BS2879 REFER TO BS 5546 ep oO ee 4 22mm VENT 2 q G 15mm COLD FEED INDIRECT CYLINDER Shown with 27metres recommended Max thermostat and valve BOILER To Heating Circuit DRAIN OFF Distributor tube in COCK pumped return connection PUMPED HEATING AND GRAVITY DOMESTIC DIAGRAMMATIC Diagram 2 1 22mm VENT e 2 15mm COLD FEED 1 metre TO INDIRECT MIN CYLINDER 27metres MAX To Heating Circuit DRAIN OFF Distributor tube in COCK pumped return connection
3. be drained rapidly to complete the flushing process Refill the system vent and check for water soundness 7 3 Operational Checks Check operation of the flame failure device as follows with the main burner alight turn the gas valve control knob A fully clockwise to its stop this will put out the main and pilot flames The safety device should close within 60 seconds a click from the valve will indicate this Remove the pressure gauge and refit the pressure test point screw G Make sure that a gas tight seal is made Turn thermostat knob B to O and relight the pilot burner as Section 7 2 Do not attempt to adjust the thermostat calibration screw Relight the main burner 7 4 Spillage Test Test the appliance spillage of the flue products at the draught diverter as detailed in the current issue of BS5440 Part 1 7 5 Completion and User Information Instruct and demonstrate the efficient and safe operation of the boiler and heating domestic hot water system Hand the Instructions for Use to the user for keeping and make sure that they are understood Advise the user that to ensure the continued efficient and safe operation of the boiler it is recommended that it is checked and serviced as necessary at regular intervals The frequency of servicing will depend upon the particular installation conditions and usage but in general once a year should be enough Draw attention if applicable to the
4. Operate piezo Is there a spark across gap 1 NO YES l Change Change piezo unit ignition unit e r e Check electrode gap Reposition or replace electrode as necessary Diagram 10 6 23 221758A 11 Spare Parts 11 1 Ordering When ordering spare parts quote the part number and description stating the model and serial number off the data label L see diagram 7 1 If ordering from British Gas also quote the GC appliance number off the data label and the required spare part GC number 8067 Diagram 11 1 Key No Part No Description GC Part No 1 203323 Gas control valve 394 348 2 205746 Injector 120 x2 3 203414 Pilot burner 312 246 4 203508 Injector pilot 395 674 5 900001 Thermocouple c w nut 6 202571 Thermostat c w screws 7 204687 Control knob assy thermostat 8 202713 Piezo unit 9 WW4609 Ignition lead assembly 136 464 10 202605 Spark Electrode 395 720 11 800726 Flue Blockage Safety device 278 410 12 208302 Sight glass 312 419 13 212031 O Ring gas valve 312 602 Because of our constant endeavour for improvement details may vary slightly from those shown in these instructions 221758A 24
5. Refer to the relevant parts of Section 8 2 Disconnect the thermocouple nut interrupter electrical connections and pilot tube connections at the gas valve see diagram 9 1 Support the valve and remove the four right hand flange screws to disconnect the gas valve from the burner supply pipe Ease the gas service cock union out and remove the valve taking care not to damage the O ring seal at the flange Inspect the condition of the O ring seal and renew if necessary Remove the union half and refit into replacement valve on the inlet left hand side Use a little jointing compound on external thread only to ensure gas soundness It will be necessary to purge air from the gas supply relighting should be carried out as Section 7 2 9 2 Injectors Gain access to the boiler as Section 8 1 Refer to the relevant parts of Section 8 2 and 8 3 Unscrew the injector from the manifold and renew as necessary When replacing the injector use a little jointing compound on the external thread only to ensure gas soundness Replace thermostat phial 9 3 Thermocouple Gain access to boiler as Section 8 1 Remove the lint arrester as Section 8 3 Disconnect the thermocouple by unscrewing nuts at the gas valve and pilot burner see diagram 9 1 and 9 2 Withdraw the thermocouple Replace the lint arrester as Section 8 3 9 4 Pilot Burner Gain access to boiler as Section 8 1 Remove cover and burner controls assembly as
6. a competent person Identify the controls by reference to diagram 7 1 Check that the gas service cock K is closed indicator slot vertical Make sure that the thermostat phial is fully inserted in the phial pocket J and is securely located by the retaining split pin Check that the mains electrical supply is switched off Set thermostat control knob B to O Remove the burner pressure test point screw G and fit a suitable pressure gauge Open gas service cock K slot horizontal Note Make sure the Flue Blockage Safety Device reset button P is fully pushed in Turn gas control knob A to 4 pilot ignition position and push in Atthe same time push and release button C until the pilot 13 burner lights view through window E At this stage air may be present in the supply pipes so this operation may need to be repeated When the pilot burner lights keep knob A fully pushed in for about 15 seconds If the pilot burner fails to stay alight repeat the operation only this time keep knob A pushed in for a little longer Note Should the boiler fail to operate correctly refer to the Fault Finding Section 10 If gas control knob A is turned to a safety lock prevents it being turned on again No attempt should be made to push in and turn knob A until three minutes have gone by Make sure that the pilot burner is alight and stable see diag
7. cable clips at positions P Alternative pump cable clips if feed is on the left hand side at positions CAPILLARY AP AND INTERRUPTER Fit 4 control ELECTRICAL clips at positions CB CABLE CLIP POSITIONS Diagram 6 2 7 Commissioning Se SSS 25 26222555225 8 e OFF B e i 4 PILOTIIGNITION 5 e 2 J MAIN BURNER fF gt j a D gt YTA SETTING SETTING POINT _ lt POINT o en A GAS CONTROL KNOB J PHIAL POCKET B THERMOSTAT CONTROL K GAS SERVICE COCK C PIEZO IGNITION BUTTON L DATA BADGE E VIEWING WINDOW M GAS CONTROL VALVE F BURNER GAS RATE ADJUSTMENT N PILOT ADJUSTMENT SCREW G BURNER PRESSURE TEST POINT P FLUE BLOCKAGE SAFETY H CONTROL BOX DEVICE RESET BUTTON BOILER COMPONENTS Diagram 7 1 Please ensure the Benchmark logbook is completed and left with the user 7 1 Preliminaries The whole of the system with the pump removed should be thoroughly flushed out with cold water Refit the pump and fill the system Examine for water soundness and vent all air from the system including the pump Make sure that all valves are open 7 2 Initial Lighting Testing and Adjustment Caution The following should be carried out by
8. current issue of the Gas Safety Installation and Use Regulations Section 35 which imposes a duty of care on all persons who let out any property containing a gas appliance Advise that the boiler is fitted with a Flue Blockage Safety Device and refer to the Instructions for Use Reminder Leave these instructions and the Benchmark logbook with the user Fit the plinth front by locating the sides over the boiler plinth then lowering to engage the upper and lower hooks see diagram 7 3 Fit the door by locating the hooked runner at the bottom into the slots in the side casings and pushing onto the studs on the side casings 221758A 14 FLAME PILOT BURNER ASSEMBLY PILOT FLAME AND SPARK GAP DIMENSIONS 13 1 5 in APPROX 0890 VIEWING WINDOW Diagram 7 2 PLINTH DOOR FITTING 1356 STUD DOOR FASCIA PLINTH FRONT Diagram 7 3 8 Servicing Servicing must be carried out by a competent person Before starting any servicing turn off the gas and electrical supply to the boiler Always test for gas soundness after completing any servicing or replacement of gas carrying components 8 1 Gain Access to Boiler Pull door forwards at the top to disengage studs and lift to release from the slots see diagram 7 3 Lift the plinth front up and forwards to withdraw see diagram 7 3 If the top casing is removed care must be taken not to damage or lose any
9. labour charges FOR 1ST YEAR GUARANTEE PROTECTION ff All call out charges CALL 0208 247 9857 Customer Services Hepworth Heanng Ltd Nottingham Road Belper Derbyshire DE56 1JT General Sales enquiries Tel 01773 828100 One Contact Local Service Fax 01773 828070 Tel 01773 824141 Fax 01773 820569 Important Information Notes and General Information Please read these instructions and follow them carefully for the safe and economical use of your boiler The boiler is automatic in operation once the pilot is lit and the controls have been set Glow worm Hideaways are central heating boilers to provide heating and if required an indirect domestic hot water supply Gas Safety Installation and Use Regulations In your own interests and that of safety itis the Law that ALL gas appliances are installed by a competent person in accordance with the current issue of the above regulations CE Mark This boiler meets the requirements of Statutory Instrument No 3083 The Boiler Efficiency Regulations and therefore is deemed to meet the requirements of Directive 92 42 EEC on the efficiency requirements for new hot water boilers fired with liquid or gaseous fuels Type test for purposes of Regulation 5 certified by Notified body 0086 Product production certified Notified body 0086 The CE Mark on this appliance shows compliance with 1 Directive 90 396 EEC on the approximation
10. plastic pegs when refitting see Section 5 3 8 2 Boiler Flueways Unscrew the union nut securing the gas service cock to the gas valve see diagram 8 1 Remove the mains inlet connector by pulling downwards see diagram 8 1 Remove electrical connections from the interupter see diagram 8 1 Remove the retaining split pin from the phial pocket then withdraw the phial and capillary see diagram 4 5 Remove the four screws retaining the combustion chamber cover and burner assembly see diagram 8 3 Ease the gas service cock away from the gas valve and unhook the pipe support bracket from the tie bar to enable the assembly of cover control box gas valve and burner to be withdrawn forward Remove graphite coated nuts to release baffle tray remove from combustion chamber taking care not to damage the insulation material on th sides of the chamber Remove self tapping screws which retain the flueway cleaning door and lift door clear see diagram 8 3 Remove flueway baffles see diagrams 8 6 Place a sheet of paper in the combustion chamber to catch any flue debris Access for flueway cleaning is made through the flueway cleaning and combustion chamber openings Thoroughly clean boiler flueways and fins from the top and bottom with a suitable stiff brush Remove any debris from the base of the combustion chamber Check that the flueways are clear view with the aid of a mirror or reflector 15 GAS MAINS INLET ea
11. relevant parts of Section 8 2 Remove lint arrester as Section 8 3 Disconnect the ignition lead at the electrode see diagram 9 2 Disconnect the thermocouple nut at the pilot burner Disconnect the pilot tube nut ease out the tube and injector which is hooked on to the pilot tube Remove the nut retaining the spark electrode and remove Remove the two screws and nuts securing the pilot burner and shield to the combustion chamber cover Reassemble in the reverse order hooking pilot injector over pilot tube olive when refitting Replace thermostat phial Section 8 5 Replace lint arrester Section 8 3 Check that the pilot flame length is as shown in diagram 7 2 17 GAS 8 VALVE PLUG PILOT VA TUBE NUT cas 7 VALVE ana OUTLET 377 FLANGE 1 SCREW ES see Ay INTERRUPTER THERMOCOUPLE CONNECTIONS REMOVAL OF GAS VALVE Diagram 9 1 SECURING SCREW 2 D AND NUT 2 SPARK ELECTRODE THERMOCOUPLE IGNITION LEAD CLEAR END P PILOT PILOT 4 TUBE INJECTOR NUT PILOT ASSEMBLY Diagram 9 2 REAR INSULATION PANEL 1274 GRAPHITE COATED NUT Diagram 9 3 INSULATION PANELS 221758A 9 Replacement of Parts S ky CUT OUT FOR CAPILLARY ELECTRICAL HOOK CONTROL BOX COVER THERMOSTAT AND CAPILLARY Di SN COVER IGNITION LEAD cantar BLACK END po THERMOSTAT SECURING SCREW 2 PIEZO UNIT S MS ELECTRICA
12. telephone number given on the inside of the front panel Please be advised that the Benchmark logbook should be completed by the installation engineer on completion of commissioning and servicing All CORGI Registered Installers carry a CORGI ID card and have a registration number Both should be recorded in your boiler Logbook You can check your installer is CORGI registered by calling CORGI direct on 01256 372300 Boiler Electrical Supply WARNING This boiler must be earthed The boiler must only be connected to a 230V 50Hz supply protected by a 3A fuse maximum All wiring must be in accordance with the current issue of BS7671 Heat resistant cable having a conductor size of 0 75mm 24 0 22mm to BS6500 Table 16 must be used To Connect an Electrical Plug The colours of three core flexible cable are Brown live Blue neutral Green and yellow earth As the markings on your plug may not correspond with these colours continue as follows The wire coloured brown must be connected to the terminal marked L or Red The wire coloured blue must be connected to the terminal marked N or Black The wire coloured green and yellow must be connected to the terminal marked E Green or the earth symbol L FLUE BLOCKAGE SAFETY DEVICE RESET BUTTON THERMOSTAT CONTROL KNOB B PIEZO IGNITION BUTTON G GAS k CONTROL N a KNOB A SETTING POINT GAS CONTROL
13. x SECURING LOCKNUT a ar 8056 FLUE BLOCKAGE SAFETY DEVICE N D m N Viliss ELECTRICAL CONNECTIONS Diagram 9 6 221758A 9 Replacement of Parts a CAPILLARY g Sa l S A CABLE CLIPS FLUE BLOCKAGE SAFETY DEVICE CAPILLARY REMOVAL Diagram 9 7 6298 T LOCATION STUD SECURING NUT PHIAL a PHIAL ASSEMBLY PHIAL ASSEMBLY REMOVAL Diagram 9 8 10 Fault Finding Electrical 10 1 Electrical Refer to functional flow diagram 10 1 electrical fault finding chart diagram 10 2 and wiring diagram 9 5 IMPORTANT The preliminary electrical system checks contained in a multimeter instruction book are the first checks to be carried out during and fault finding procedure On completion of the service fault finding task which has required the breaking and remaking of electrical connections then checks earth continuity polarity and resistance to earth must be repeated 10 2 Thermocouple To test the thermocouple a meter with a range 0 to 30mV is required together with a thermocouple interrupter test unit similar to the British Gas Multimeter and interrupter Refer to thermocouple fault finding chart diagram 10 3 and diagnosis graph diagram 10 4 10 3 Pilot and Ignition Refer to pilot and ignition fault finding chart see diagram 10 6 and 10 3 10 4 Flue Blockage Safety Device If the device opera
14. 140kg 310 Ib 11 7litre 2 57 gal Re BSP Re1 1inch BSP 230V 50Hz fused at 3A Burner Aeromatic The Seasonal Efficiency Domestic Boilers UK SEDBUk is 73 The value is used in the UK Government s Standard Assessment Procedure SAP for energy rating of dwellings The test data from which it has been calculated have been certified by B S I Water content Gas connection Water connection Electrical supply 1 2 Range Rating This boiler is range rated and may be adjusted to suit individual systems The table gives settings and outputs The boiler input is supplied preset to maximum and should be adjusted to suit system requirements HIDEAWAY 120 RANGE RATING min max NOMINAL kW 37 10 40 5 43 96 HEAT INPUT GROSS Btu h 126 600 138 200 150 000 NOMINAL kW 29 31 32 24 35 17 HEAT OUTPUT Btu h 100 000 110 000 120 000 BURNER mbar 12 9 SETTING PRESSURE in w g 5 2 HOT INJECTOR 205746 1 3 Statutory Requirements The installation of this boiler must be carried out by acompetent person in accordance with the relevant requirements of the current issue of Manufacturer s instructions supplied The Gas Safety Installation and Use Regulations The Building Regulations Local Water Company Byelaws The Building Standards Scotland Regulations applicable in Scotland The Health and Safety at Work Act The Control of Substances Hazardous to Health The Electric
15. BRACKET CASING BRACKETS FITTING 1000 Diagram 4 1 DOMESTIC GRAVITY FLOW TO ANY OF THE HEATING 3 REMAINING UPPER FLOW CONNECTIONS Thermostat phial and pocket must lt be adjacent to O Za heating flow 7 connection 0 KK ALTERNATIVE DOMESTIC GRAVITY Qa HEATING RETURN TO RETURN ANY OF THE With distributor 3 REMAINING tube not LOWER CONNECTIONS shown WATER CONNECTIONS GRAVITY DOMESTIC PUMPED HEATING ALTERNATIVE 8 Diagram 4 2 UPPER MARKER DISTRIBUTOR TUBE N UPPER MARKER must lie between the two outer NOTCHES ma 7 DISTRIBUTOR TUBE must be in pumped return N connection 1277 Diagram 4 3 221758A 4 Installation Fit the distributor tube see diagram 4 2 or 4 4 for location see diagram 4 3 for alignment Fit appropriate fittings and plugs into the boiler connections IMPORTANT Do not route any pipe across the front of the boiler thermostat pocket the controls burner supply pipe combustion chamber cover or the flueway cleaning door The gas supply pipe should be run along the left hand side of the boiler Pipework must not be routed directly below the draught diverter hood across the boiler but it may be routed under the edges of the draught diverter When suitable installation clearances are available position the boiler in readiness to connect pipework If suitable clearances are not available it will be necessary to preplumb th
16. FULLY PUMPED SYSTEM DIAGRAMMATIC Diagram 2 2 FLOW RATE GALLON MINUTE 0123 45 67 8 9 10 3 or no DE o H Ow Oe l l wx W z DL 50 ep O Jp Q a Nx wa W ui X q cr ow OH xT lt u E g es xo lt x Se ze 0 10 20 30 40 50 FLOW RATE LITRES MINUTE PRESSURE LOSS OF BOILER Diagram 2 3 221758A 3 Flue and Ventilation Important Note The boiler is fitted with a Flue Blockage Safety Device which will shut down the boiler if there is an unacceptable spillage of products at the draught diverter This safety device MUST NOT under any circumstances be interferred with or put out of action The safety device must only be replaced with the Glow worm parts 3 1 Flue The integral draught diverter on the Hideaway range of boilers makes the combustion performance independent of conditions inthe secondary flue butin common with other fuels an efficient flue is necessary to make sure of a trouble free installation The flue must be at least equivalent to 1m vertical The boiler flue socket is designed to take flue pipes to the current issue of BS567 Ifa flue pipe to BS715 is to be used an adapter must be fitted to the boiler flue socket as diagram 1 1 The flue must be in accordance with the current issue of BS5440 Part 1 3 2 Flue Guidelines The flue should be kept as short as possible Horizontal or very shallow runs of the flue should be avoided as they encourage local cooling Always choo
17. For short periods Turn the boiler thermostat control knob B anticlockwise to O The pilot will remain alight To relight the main burner turn the thermostat control knob B clockwise to the desired setting between MIN and MAX For longer periods Push in slightly and turn gas control knob A fully clockwise until is against its setting point Turn thermostat control knob B anticlockwise to O Isolate the boiler from the electrical supply Follow the full lighting procedure to relight Refer also to Protection Against Freezing Gas Leak or Fault If a gas leak or fault exists or is suspected the boiler must be turned off including the electrical supply and must not be used until the fault has been put right Advice help should be obtained from the local gas undertaking or your installation servicing company Protection Against Freezing If the boiler is to be out of use for any long period of time during severe weather conditions we recommend that the whole of the system including the boiler be drained off to avoid the risk of freezing up If an immersion heater is fitted in the domestic hot water cylinder make sure it is switched off Sheet Metal Parts WARNING This appliance contains metal parts component and care should be taken when handling and cleaning with particular regard to edges Cleaning Keep the casing clean by wiping it over occasionally with a damp so
18. KNOB OFF PILOT IGNITION MAIN BURNER Diagram 1 221758A Instructions for Use Safety Device This appliance is fitted with a flue blockage safety device which will shut down the appliance in the event of abnormal flue conditions This device is NOT a substitute for an independently mounted Carbon Monoxide detector The safety device is reset after three minutes by pushing in the button shown in diagram 1 Shut down can occur during certain climate conditions but if it recurs the chimney flue and air inlet into the room must be checked and any problems found corrected by a competent person before the boiler is used again To Light the Boiler WARNING If the pilot light goes out for any reason do not attempt to relight until three minutes have gone by Remove the door by pulling forwards with the fascia at the top Lift up to free from bottom side lugs Refer to diagram 1 to identify the controls Check that the mains electrical supply to the boiler is switched OFF Check that the Flue Blockage Safety Device has not operated that is the button is in Refer to Safety Device instructions Push in slightly and turn gas control knob A clockwise until is against its setting point Turn thermostat control knob B anticlockwise until O is against its setting point Pushin slightly and turn gas control knob A anticlockwise until 4 is against its setti
19. L CONTROL BOX THERMOSTAT CONTROL ELECTRICAL KNOB ve CONNECTORS CONTROL BOX yo SECURING SCREW 2 Diagram 9 4 9 5 Spark Electrode Gain access to the boiler as Section 8 1 Disconnect the thermocouple nut and withdraw thermocouple from pilot burner see diagram 9 2 Disconnect the nut retaining the spark electrode and remove Check that the spark gap is as shown in diagram 7 2 9 6 Insulation Panels Gain access to the boiler as Section 8 1 Remove the burner assembly as the relevant parts of Section 8 2 Remove the two screws retaining each side insulation panel within the combustion chamber and remove panel see diagram 9 3 Release the rear insulation panel upper clips and lift out panel Reassemble in reverse order Refit the thermostat phial as the relevant part of Section 8 5 221758A 18 9 7 Boiler Thermostat Follow the relevant instructions in Section 8 1 Remove the mains inlet connector by pulling downwards see diagram 8 1 Remove the retaining split pin from the phial pocket then withdraw the phial and capillary see diagram 4 5 Pull off the thermostat control knob Gain access to inside of the control box by removing the securing screw located at the top of control box and unhooking at the bottom see diagram 9 4 Remove the two screws which secure the boiler thermostat to the control box see diagram 9 4 Tilt the thermostat so that the electrical connections can be removed W
20. N mm in Imm in mm in Imm in NOT PERMITTED 624 245 3 75 3 TOP amp SIDE CLEARANCES Diagram 1 2 WALL OR FIXTURE 530 21in BOILER FRONT CLEARANCE Diagram 1 3 2 Water Systems 2 1 Water Pressure Head This boiler must not be connected to a sealed water system This boiler shall only be connected to an open vented cistern water supply with a minimum head of 1metre 39in and a maximum of 27metre 9Oft 2 2 Inhibitor Attention is drawn to the current issue of BS5449 and BS7593 on the use of inhibitors in central heating systems If an inhibitor is to be used in the system contact should be made with a manufacturer so that they can recommend their most suitable product If using in an existing system take special care to drain the entire system including the radiators then thoroughly cleaning out before fitting the boiler whether or not adding an inhibitor 2 3 Gravity Domestic Hot Water and Pumped Central Heating It is recommended that a cylinder thermostat is used to prevent the stored water temperature becoming too high when the heating pump is off The domestic hot water primary flow and return must be 28mm od The installation must comply with the current issue of BS5546 and BS6700 see diagram 2 1 Ifthe above conditions cannot be met it is suggested that a fully pumped system is used 2 4 Pumped Central Heating and Domestic Hot Water Where a single flow and return is taken from the boiler
21. STAT PHIAL Diagram 4 5 A A 2 Y VIEW ON ARROW A p tjn BOILER m i 57 MAX 21 in PIPEWORK CASING CLEARANCES Diagram 4 6 Clearance X must be left to enable cleaning door removal and boiler servicing 0 foe oO 175 7 FLUEWAY 5 2H CLEANING ALTERNATIVE RH FLOW E CONNECTION LH FLOW 7 ISOLATING CONNECTION VALVES PUMP CLEARANCES Diagram 4 7 5 Casing Location Fitting 5 1 Side Vent Grille One vent grille is supplied with the boiler which can be fitted at the rear of the left or right hand side casing The grille is fitted on the opposite side to any pipework connections Fit the grille if required to the side panel as shown in diagram 5 1 prior to fixing the side panel The plastic pegs are a tight fit and are best pushed home with a flat faced tool Do notuse the grille if water connections are on both sides of the boiler or if the boiler is screened by fixtures 5 2 Side Casings Fit side casing by locating their lugs into the lower slots in the base tray see diagram 5 2 Secure the casing sides to the casing bracket at the front top 5 3 Top Casing The top casing can be fitted in two alternative positions that is with either the front edge flush with the door or overhanging it see diagram 5 3 For a flush fitting top casing fit four plastic pegs in holes A as shown in diagram 5 3 For overhan
22. all cocks rectify any blockages purge out any air Check flue blockage safety device is reset check all thermocouple circuit connections are clean and in good condition Does pilot light o YES Apply match to pilot burner instead of pressing piezo unit button Does pilot light o YES Undo tubing nut at pilot burner Press gas valve knob Does gas flow freely NO YES Rectify blockage in pilot injector or renew pilot injector Undo tubing nut at pilot outlet of gas valve Press gas valve knob Does gas flow freely NO vesi Change blocked pilot tube Change gas valve PILOT IGNITION FAULT FINDING 0905A Does pilot stay alight when gas valve knob is released NO YES iy PILOT SATISFACTORY Does pilot flame envelope thermocouple I NO YES Check aeration If necessary Clean pilot rectify blockage in pilot injector or replace Paes Check thermocouple circuit using Thermocouple Fault Finding diagram On pressing piezo unit button is there a spark across electrode gap NO YES Pull ignition lead off electrode Hold end of lead close to pilot burner and operate piezo unit Is there a spark across gap ii NO YES Pull ignition lead off piezo unit Using blade of a screwdriver touch unit chassis and leave approx 4mm gap from connection tag on piezo unit
23. apy cloth and dry with a polishing cloth Do not use abrasive cleaners Replacement Parts Boiler Identification If replacement parts are required apply to your local supplier or gas undertaking Please quote the name of the boiler and its serial number which can be found on the data label positioned on the boiler top to the rear of the inclined flueway cleaning door Clearance Minimum clearances must be left around the boiler as shown in diagram 1 2 and 1 3 1 General 1307 t ASPECIAL TOP CASING TO SUIT 600mm 235 in WORKTOPS IS AVAILABLE GAS CONNECTION Re 5 1 2 in B S P T WATER CONNECTIONS Rc1 tin B S P T WATER CONNECTIONS Rci reduced with DISTRIBUTOR TUBE to Re 3 4 3 4 in B S P T pumped return INSIDE DIAMETER OF SOCKET FOR 152mm 6in NOMINAL DIAMETER FLUE TO BS567 Diagram 1 1 Sheet Metal Parts Warning When installing or servicing this boiler care should be taken when handling sheet metal parts to avoid the possibility of personal injury Important Notice This boiler is for use only on G20 gas Wherever possible all materials appliances and components to be used shall comply with the requirements of British Standards Where no British Standards exist materials and equipment should be fit for their purpose and of suitable quality and workmanship 1 1 Data Approx weight of boiler
24. be sited further away from the wall if required to align with kitchen units Combustible wall material must be 25mm 1in away from flue components A special top casing part number 425562 can be bought to enable boiler casings to be arranged flush with 600mm 23 in deep worktops Where the installation of the boiler will be in an unusual location special procedures may be necessary the current issue of BS6798 gives detailed guidance on this aspect 221758A 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 essential features of cupboard andcompartment design are given in the current issue of BS6798 Make sure that nothing will obstruct the side clearances or side grilles If installing the boiler in a compartment make sure that openings and vents are not obstructed 1 8 Heating System Controls The heating system should have installed a programmer and room thermostat controlling the boiler Thermostatic radiator valves may be installed in addition to the room thermostat Note For further information see The Building Regulations 1991 Conservation of fuel and power 1995 edition Appendix G table 4b foe oO WORKTOP 254 10 in Y BOILER Z W MIN X MIN Y MIN Z MI
25. ch any hot surfaces 6 2 Circulation Pump Cable Connection Heat resistant cable with a rating as stated in Section 1 6 must be used for all wiring near the boiler including the pump if within the boiler casing Support the pump cable away from hot surfaces if within the boiler casing by pushing two cable clips supplied loose on to the top edge of one side casing as shown as P or AP in diagram 6 2 6 3 Flue Blockage Safety Device Capillary and Interrupter Electrical Leads For transit the capillary is taped to the side of the boiler Remove tape and place capillary into cable clips provided see diagram 6 2 Note Capillary must not touch the heat exchanger side Secure the interrupter electrical leads so as not to strain them see diagram 6 2 6 4 System Controls The electrical installation must be in accordance with the current issue of BS7671 The electrical isolator must isolate both the boiler and system controls 6 5 Testing Checks to ensure electrical safety should be carried out by a competent person In the event of an electrical fault after installation of the boiler preliminary system checks must be carried out that is earth continuity polarity and resistance to earth as described in a multimeter instruction book 221758A g COVER So MAINS INLET CONNECTOR Diagram 6 1 SAFETY DEVICE CAPILLARY CLIP POSITION CB __ 230 25 ee 1 Fit 2 pump
26. e gas and water connections before positioning the boiler When the front connections are used it is essential that any pipework or fittings be assembled as shown in diagram 4 6 that is do not stick out more than shown Make the water connections to the system pipework Make the gas connection to gas supply at the union gas service cock Test the complete gas installation for soundness and purge in accordance with the current issue of BS6891 4 7 Pump within Boiler Casing If the pump is to be fitted inside the boiler casing connect it as shown to either of the upper front flow connections see diagram 4 7 There must be sufficient clearance X between the pump body and the flueway cleaning door to allow removal of the door Dependent upon the type of pump used the flow pipe arrangements and pump may require titling backwards to clear the casing door 4 8 Flue Connection The flue should be 150mm 6in nominal diameter refer to Section 3 and diagram 1 1 Fix and seal the flue to the hood in accordance with normal practice ALTERNATIVE FLOW POSITIONS Must be adjacent to THERMOSTAT PHIAL POCKET 1310 N 2 ho ALTERNATIVE I N RETURN POSITIONS With distributor tube not shown WATER CONNECTIONS FULLY PUMPED SYSTEMS Diagram 4 4 221758A 10 oO N THERMOSTAT CAPILLARY LOCATION WASHER O PHIAL P POCKET RETAINING SPLIT PIN SECURING THE THERMO
27. ection of the boiler and any system controls to the mains supply should be through a 3A fused double pole isolating switch having a minimum double pole contact separation of 3mm serving only the boiler and system controls Heat resistant flexible cable of at least 0 75mm to the current issue of BS6500 Table 16 must be used for all connections within the boiler casing 1 7 Boiler Location The boiler must not be installed in a room used or intended to be used as sleeping accommodation or a room containing a bath or shower This boiler is not suitable for installation out of doors The boiler must stand on a level floor conforming with local authority requirements and building regulations The base temperature is within the requirements of the current issue of BS5258 The boiler may be stood on a wooden floor but a metal plate is required to protect plastic tiles and similar floor coverings Suitable clearance needs to be available at the sides of the boiler to ease connection of pipework The actual clearances will vary according to site conditions When the boiler is to be installed level with work surfaces minimum clearances to fixtures walls and the like should be provided see diagram 1 2 To ease minimum clearances it may be necessary to modify units or fixtures A front access clearance should be provided as shown in diagram 1 3 The minimum gap behind the top casing is dimension G in diagram1 1 The boiler can
28. ging top casing fit four plastic pegs in holes B The plastic pegs are a tight fit so they are best pushed home with a flat faced tool Fit the top casing by engaging the pegs into the holes in the side casings and then makes sure they are fully engaged by pushing the pegs down CASING BRACKET CASING BRACKET LUG AND SLOT SIDE CASINGS FITTING Diagram 5 2 1018 PLASTIC PEG SIDE VENT GRILLE If required will fit to PS left or right side casing lO J Q g SIDE CASING R H SHOWN SS SIDE VENT GRILLE Diagram 5 1 11 PLASTIC PEG 4 TOP CASING PEG POSITIONS IN TOP CASING A FRONT EDGE FLUSH B 10mm 3 g in FRONT OVERHANG SIDE CASING CASING DOOR DOOR TOP CASING FITTING Diagram 5 3 1180 221758A 6 Electrical Wiring 6 1 Control Box Cable Connection Remove the screw and cover from the mains inlet connector see diagram 6 1 Using heat resistant flexible cable of suitable length and rating as Section 1 6 connect the cable to the terminals in the connector Secure the outer sheathing with the clamp Engage slots and lugs replace connector cover and secure with screw Connect mains inlet connector to the control box and use three of the cable clips supplied loose pushed on to the edge of the left hand panel in positions CB as shown in diagram 6 2 to make sure that the cable does not tou
29. he skin seek medical attention Boiler Thermostat These contain very small amounts of xylene in the sealed phial and capillary If broken under normal circumstances the fluid does not cause a problem but in cases of skin contact wash with cold water If swallowed drink plenty of water and seek medical attention SECTION PAGE No 3 4 1 5 2 7 3 8 4 9 5 11 6 12 7 13 8 15 9 17 10 20 11 24 Instructions for Use Warning Make sure that nothing obstructs the rear side grilles or clearances See diagram 1 2 and 1 3 for minimum clearances Boilers Installed in a Compartment If the boiler is fitted in a compartment cupboard etc do not obstruct the purpose built compartment vents or grille on the boiler Do not use the compartment for storage purposes Maintenance To ensure the continued efficient and safe operation of the boiler it is recommended that it is checked and serviced at regular intervals The frequency of servicing will depend upon the particular installation conditions and usage but in general once a year should be enough If this appliance is installed in a rented property there is a duty of care imposed on the owner of the property by the current issue of the Gas Safety Installation and Use Regulations Section 35 It is the law that servicing is carried out by a competent person To obtain service please call your installer or Heatcall Glow worm s own service organisation using the
30. he ventilation opening areas are given in Air Vent Table A The figures quoted refer to the minimum acceptable effective area 221758A 3 5 Ventilation for Boilers Installed in a Cupboard or Compartment When the boiler is fitted in a cupboard or compartment high and low level purpose designed permanent openings must be provided to supply air for combustion and compartment ventilation The air vents must have minimum areas in accordance with Compartment Air Vent B The figures quoted refer to the minimum acceptable effective area Both the high and low level openings must communicate with the same room or must both be on the same wall to outside air If air vent grilles are fitted to a cavity wall the opening through the wall must be ducted Where ventilation air to a compartment is taken from a room or space then the room or space must be fitted with a ventilation opening as specified in Air Vent Table A For information regarding compartment requirements refer to the appropriate section of the current issue of BS6798 AIR VENT TABLE A FOR ROOM SPACE INSTALLATIONS EFFECTIVE 171 AREA OF VENT in 26 COMPARTMENT AIR VENT TABLE B COMPARTMENT VENTILATION HIGH LEVEL LOW LEVEL REQUIREMENTS VENT AREA VENT AREA VENTILATION 810cm 123in FROM ROOM OR SPACE FROM 202cm 31in 405cm 62in OUTSIDE 3 6 Extract Fans If an extract fan is fitted in the premise
31. ithdraw boiler thermostat from control box complete with capillary tube and phial Refer to diagram 9 5 to connect electrical connectors Replace the thermostat phial as the relevant part of Section 8 5 Make sure that the capillary is positioned so that it passes through the cut out in the control box see diagram 9 4 9 Replacement of Parts Ni fq 0 jb VIEW OF PLUG WHEN REMOVED L amp E CONTROL BOX AND GAS VALVE WIRING THERMOSTAT g Ea YELLOW MAINS SUPPLY FUSED AT 3A O mAN Le J L ENOL ml Nes h ble gt lt aso oy i CHASSIS D BROWN Diagram 9 5 9 8 Piezo Unit Pull door forward at the top to disengage the studs and lift to release from slots see diagram 7 3 Remove mains inlet connector by pulling downwards see diagram 8 1 Open the control box by removing securing screw and support on the hook on the bottom of the control box cover see diagram 9 4 Disconnect the ignition lead at the piezo unit Note To ease the removal of the piezo unit it is advisable to temporarily remove the boiler thermostat from the control box Depress the retaining tabs and remove the Piezo unit 9 9 Ignition Lead Gain access to the boiler as Section 8 1 Disconnect the ignition lead at the piezo unit see diagram 9 4 and Section 9 8 Remove the lint arrester gauze as the relevant parts of Section 8 3 Disconnectthe ignition lead atthe spark electrode see diag
32. ity at Work Regulations and any applicable local regulations Detailed recommendations are contained in the current issue of the following British Standards and Codes of Practice BS6798 BS5440 Part 1 and 2 BS5449 BS6700 BS6891 BS5546 BS7478 BS7593 BS7671 Manufacturer s instructions must not be taken as overriding statutory requirements 221758A 1 General 1 4 B S I Certification This boiler is certificated by B S I for safety and performance It is therefore important that no alteration is made to the boiler unless approved in writing by Hepworth Heating Ltd Any alteration not approved by Hepworth Heating Ltd could invalidate the B S I certification boiler warranty and could also infringe the statutory requirements 1 5 Gas Supply The gas installation shall be in accordance with the current issue of BS6891 The supply from the governed meter must be of adequate size to provide a steady inlet working pressure of 20mbar 8in wg at the boiler On completion test the gas installation using the pressure drop method and suitable leak detection fluid purge in accordance with the current issue of BS6891 1 6 Electrical Warning This boiler must be earthed The electrical installation must be carried out by a competent person All external components must be of the approved type and must be connected in accordance with the current issue of BS7671 and any local regulations which may apply Conn
33. ng point then push fully and hold in Push and release piezo ignition button C until the pilot burner lights Air may be present in the supply pipe so the lighting of the pilot may need to be repeated until all the air has been expelled When the pilot is alight view through window E keep gas control knob A fully pushed in for about 15 seconds then release If the burner fails to stay alight wait three minutes then repeat the lighting procedure only now keep control knob A depressed for a little longer before releasing The Flue Blockage Safety Device may also need resetting refer to instructions above If the gas control knob A is turned to a safety lock prevents it being turned on again for a short period No attempt should be made to relight the pilot for at least three minutes Make sure that the pilot is alight and stable then switch on the electrical supply Press in and turn gas control knob A anticlockwise until amp is against its setting point Set any remote controls to call for heat Turn the boiler thermostat knob B clockwise until MAX is against its setting point and the main burner will light Adjust thermostat to required setting between MIN and MAX MAX is about 82 C 180 F Refit the door by fitting the hooked runner at the bottom into the slot in the side panels and pushing onto the studs 221758A To Turn the Boiler Off
34. of 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 use within certain voltage limits CONTENTS DESCRIPTION INSTRUCTIONS Introduction FOR USE Lighting the Boiler INSTALLATION General Data INSTRUCTIONS Water Systems Flue and Ventilation Installation Casing Location Electrical Wiring Commissioning SERVICING Servicing INSTRUCTIONS Replacement Parts Fault Finding Spare Parts 221758A 3 Directive 89 336 EEC on the approximation of the Laws of the Members States relating to electromagnetic compatibility Information for the Installer and Service Engineer Control of Substances Hazardous to Health Under Section 6 of The Health and Safety at Work Act 1974 we are required to provide information on substances hazardous to health The adhesives and sealants used in this appliance are cured and give no known hazard in this state Insulation Pads Ceramic Fibre Glassyarn These can cause irritation to skin eyes and the respiratory tract If you have a history of skin complaint you may be susceptible to irritation High dust levels are usual only if the material is broken Normal handling should not cause discomfort but follow normal good hygiene and wash your hands before eating drinking or going to the lavatory If you do suffer irritation to the eyes or severe irritation to t
35. r one of the front lower connections on ALL installations see diagram 4 3 Domestic hot water gravity return any one of the three remaining lower connections may be used for the gravity domestic hot water return Fit plugs into all unused connections Note if only limited clearance is available it is recommended that the front connections are used 4 4 Water Connections Fully Pumped Systems It is important that all connections are made as shown in diagram 4 4 The water distributor packed in the top fitment MUST be fitted into the return connection on ALL installations see diagram 4 3 Fit plugs into all unused connections Note if only limited clearance is available it is recommended that the front connections are used 4 5 Thermostat Pocket Fit the thermostat phial pocket into the front tapping adjacent to the proposed heating flow connection and plug the other front pocket connections The phial pocket and plug are in the loose items pack Carefully unwind the thermostat capillary insert the phial fully into the pocket and secure with the location washer behind the retaining split pin supplied in the loose items pack see diagram 4 5 4 6 Positioning Connecting Boiler Having selected the position of the boiler make sure that sufficient clearances will be left around the boiler as described in Section1 7 CAPTIVE CASING A BRACKET x f ons L Ti No 8 SCREW 8 ga CAPTIVE nUT A
36. ram 2 When reconnecting the lead make sure that the clear end is fitted to the spark electrode and that the black protective sleeving is in place before fitting the lint arrester gauze 9 10 Electrical Control Box Gain access to the boiler as Section 8 1 Disconnect the mains inlet connector see diagram 8 1 Remove the retaining split pin from the phial pocket then withdraw phial and capillary see diagram 4 5 Disconnect the gas valve plug from the valve see diagram 9 1 Release the control box by removing the securing screw located at the top of control box and unhooking at the bottom see diagram 9 4 Pull the ignition lead off piezo unit see diagram 9 4 When refitting control box make sure the thermostat capillary is positioned so that it passes through the cut out in the control box see diagram 9 4 Refit thermostat phial refer to Section 8 5 19 9 11 Flue Blockage Safety Device Gain access to the boiler as Section 8 1 Remove the electrical connections from the safety device body Remove the capillary from cable clips see diagram 9 7 To remove the phial assembly first gain access through flue cleaning door as Section 8 1 Unscrew securing bolt and withdraw the phial assembly from the flue see diagram 9 8 Remove the locknut securing the Flue Blockage Safety Device to the bracket and withdraw the Flue Blockage Safety Device and phial assembly see diagram 9 6 CAPILLARY ELECTRICAL CONNECTIONS
37. ram 7 2 for flame dimensions switch on the electrical supply Set any remote controls so that they are calling for heat Turn control knob A to amp main burner position Set thermostat control knob B between MIN and MAX the main burner will light MAX is about 82 C 180 F Test for gas soundness around the boiler gas components with a suitable leak detection fluid Ten minutes after lighting check the burner setting pressure and adjust if necessary as follows remove cover F see diagram 7 1 and turn adjustment screw to obtain the required heat input turn anticlockwise to decrease see diagram 7 1 data label L for settings Replace cover If any doubt exists the gas rate should be checked at the gas meter this should be in the range 221758A 7 Commissioning Hideaway 120 4 4 to 5 2m h 125 to 148ft3 h These figures are for guidance only Stick the self adhesive arrow indicator from the loose items pack to the data label against the rating the boiler is set to Allow the water system to warm up and set the pump to give the correct temperature difference of 11 C 20 F between flow and return There should be no undue noise in the pipework or heat emitters no pumping over of water or entry of air at the open vent above the cold water cistern Allow the water system to reach maximum working temperature and examine for water soundness Whilst hot the system should
38. re with the screw 8 4 Service Checks Inspect the thermocouple and pilot burner clean or renew as necessary Check the condition of the insulation panels in the combustion chamber Renew if necessary Check the condition of the seals on the flueway cleaning door and the combustion chamber renewing if necessary 8 5 Reassembly Make sure that the baffle tray is replaced and secured with the graphite coated nut previously removed Make sure that the thermostat phial is fully inserted into the phial pocket Position the location washer behind the retaining split pin see diagram 4 5 8 6 Operational Check Light the boiler and carry outthe operational checks as described in Sections 7 2 and 7 3 221758A 16 COMBUSTION MAIN N BURNER 2 i i BURNER SUPPLY INJECTOR Ze A SECURING ARRESTER NUT 2 2 W Cc D Z m D P 1276 o Q Q BURNER Ca a S END CAP a BURNER WASHER 2 STRAP ana STRAP ones SECURING NUT 2 NUT 2 GRAPHITE COATED BURNER SERVICING Diagram 8 5 5 BAFFLE EXCHANGERS BAFFLES Diagram 8 6 9 Replacement of Parts Before removing or replacing any parts turn off the gas and electrical supplies to the boiler Always test for gas soundness after replacing any gas carrying components Replacement of parts is in the reverse order to removal unless stated otherwise 9 1 Gas Valve Gain access to the boiler as Section 8 1
39. s there is a possibility that if adequate inlet openings are not provided spillage of the products from the boiler could occur When openings are fitted in accordance with the current issue of BS5440 Part 2 and this section extract fans should not cause down draught but where such fan installations are found a spillage test must be carried out in accordance with the current issue of BS5440 Part 1 and any corrective work done 4 Installation Before fitting the boiler make sure the location selected is in accordance with the requirements of Section 1 7 4 1 Unpacking The boiler casing panels are packed separately within the main case They are designed to enable the gas and water connections to be made before fitting the casing panels The main casing brackets distributor tube and loose items ina plastic bag are packed in the top fitment 4 2 Casing Brackets Fit the four casing brackets as shown in diagram 4 1 using eight No 8 screws Push the captive nuts supplied loose on to the casing brackets as shown in diagram 4 1 4 3 Water Connections Gravity Domestic Hot Water and Pumped Heating It is important that all connections are made as shown in diagram 4 2 Heating flow any one of the four upper connections may be used Domestic hot water gravity flow any one of the three remaining upper connections may be used Heating return the distributor tube packed in the top fitment MUST be fitted into eithe
40. se a flue route which will cause the least cooling of the flue There should be a vertical rise of at least 600mm 2ft before using a bend 90 elbows should not be used End with a certificated flue terminal preferably above ridge height but at least above the eaves of a pitched roof An existing chimney must be thoroughly swept and all debris cleared away before lining 3 3 Timber Frame Buildings If the boiler is to be installed in a timber frame building it should be fitted in accordance with the Institute of Gas Engineers document IGE UP 7 1998 Ifin doubt seek advice from the local gas undertaking or Hepworth Heating Ltd 3 4 Ventilation for Boiler Installed in a Room or Space If the boiler is to be installed in a room or space a purpose designed permanent ventilation opening to supply air for combustion must be provided on an outside wall to external air refer to the current issue of BS5440 Part 2 for details The opening may be directly into the room or the space containing the boiler or an outside wall of an adjacent room or space which has an internal permanent air vent of the same size into the room or space containing the boiler Do not ventilate through a bedroom bedsitting room private garage or a room containing a bath or shower When the boiler is installed in a room or internal space already containing other fuel burning appliances then the air supply of such appliances must be taken into account T
41. tes it indicates there is a problem with the chimney Make sure that the air vents are free from obstruction Carry out spillage checks as BS5440 Part 1 and put right as necessary 221758A 20 m 5 L GAS VALVE y CONTROL SOLENOID CN IPN NOL w VIEW OF gt PLUG WHEN a REMOVED BLACK BROWN L mmn FUNCTIONAL FLOW WIRING Diagram 10 1 10 Fault Finding Electrical Carry out preliminary electrical checks to make sure the electrical supply is available at the boiler Check that external controls are calling for heat Make sure that the system is filled the flue blockage safety device is reset the gas supply is available and the pilot is lit Isolate electrical supply to the control box Remove the control box cover and check all cables Turn boiler thermostat to Max Is there continuity between C and NC YES Turn boiler thermostat to O Is there open circuit between C and NC YES Restore electrical supply with pilot burner lit and boiler thermostat set NO between MIN and MAX does the main burner light YES YES Boiler controls in order ELECTRICAL FAULT FINDING 0899 A a thermostat Replace Faulty gas valve NO Replace Turn boiler thermostat to O Does main burner extinguish Diagram 10 2 21 221758A 10 Fa
42. u CONNECTOR turn off pull downwards shown closed ELECTRICAL CONNECTIONS 7992 ISOLATION OF GAS AND ELECTRICITY Diagram 8 1 INTERUPTER 5 CONNECTIONS BAFFLE TRAY PIPE SUPPORT BRACKET GRAPHITE COMBUSTION COATED CHAMBER NUT COVER SECURING SCREW 5 ACCESS FOR SERVICING Diagram 8 2 S SE S FLUEWAY o CLEANING 2 O a ro TAPPING 2 SCREWS 4 ACCESS TO FLUEWAY Diagram 8 3 221758A 8 Servicing 8 3 Burners and Injectors Follow instructions to remove the cover burner and controls assembly as described in Section 8 2 Remove the screw securing the lint arrester gauze to combustion chamber cover Remove arrester by lifting slightly and withdrawing forwards to clear burner supply pipe and thermocouple etc see diagram 8 4 Remove the four burner securing nuts from the flange of the burner supply pipe Remove the burner from the cover supply pipe flange Remove the securing nut washer and burner end cap from burner see diagram 8 5 Clean the burner parts and lint arrester with a vacuum cleaner Check that the main burner injector is not damaged or blocked Clean or renew as necessary do not clean with a wire or sharp instrument Refer to Section 9 2 and diagram 8 5 When replacing the lint arrester locate the two lugs into the slots on the combustion chamber cover and locate around the feed pipe etc then secu
43. ult Finding Thermocouple m With the boiler cold check connections of the thermocouple boiler flue blockage safety device X and gas valve Reset flue blockage safety device 9 Disconnect flue blockage safety device connectors at points A and B at the gas valve see diagram Interrupter Electrical Connections Test continuity of the flue blockage safety device Is there continuity Faulty boiler flue blockage safety device renew Re connect boiler flue blockage safety device to points A and B Disconnect thermocouple at connection point D of the gas valve Faulty flue blockage safety device Test continuity between point C and the connectors into gas valve body of the gas valve either at A or C Is there continuity Renew where faulty Test continuity of thermocouple between inner connection point D and point E Faulty thermocouple renew Is there continuity Thermocouple and boiler flue blockage safety device circuit satisfactory THERMOCOUPLE AND FLUE BLOCKAGE SAFETY DEVICE FAULT FINDING Diagram 10 3 N mM Q wo FLUE BLOCKAGE SAFETY DEVICE oO CONNECTION a CONNECTION E er B Sa aCe 0 2 4 6 8 10 12 14 16 18 20 22 CON Ne Closed Circuit Voltage millivolts DIAGNOSIS GRAPH FOR INTERRUPTER ELECTRICAL l THERMOCOUPLE CIRCUIT Diagram 10 4 CONNECTIONS Diagram 10 5 221758A 22 10 Fault Finding Pilot START HERE Check gas line open
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