IDEAL LOGIC Combi 24 Installation And Servicing
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IDEAL LOGIC Combi 24 Installation And Servicing

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See also: Installation and Servicing , User Manual
INSTALLATION
AND SERVICING
LOGIC Combi
24, 30, 35
For users guide see reverse of book
For details of document amendments, refer to page 3
When replacing any part on this appliance, use only spare parts that you can be
assured conform to the safety and performance specification that we require.
Do not use reconditioned or copy parts that have not been clearly authorised by Ideal.
For the very latest copy of literature for specification and maintenance practices visit our
website www.idealheating.com where you can download the relevant information in PDF format.
August 2011
UIN 204626 A08

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  • Page 1 Do not use reconditioned or copy parts that have not been clearly authorised by Ideal. For the very latest copy of literature for specification and maintenance practices visit our website www.idealheating.com where you can download the relevant information in PDF format.
  • Page 2 Ideal Logic Combi - Installation and Servicing...
  • Page 3 Page 44, Frame 59 - condensate Trap/siphon Replacement • New procedure Page 60, short List of Parts • New UIN numbers for item 302a (models 30 & 35 only) User Guide - Page 7, Fault Codes • New updated table Ideal Stelrad Group reserve the right to vary specification without notice Ideal Logic Combi - Installation and Servicing...
  • Page 4 - divide the gross heat input and discharges the products of combustion to the outside through (kW) by the gross C.V. of the gas (MJ/m orifices which, in this case, are concentric. The fan is up stream of b. For ft /h - divide the gross heat input (Btu/h) the combustion chamber. by the gross C.V. of the gas (Btu/ft = An appliance designed for use on 2nd Family gas, Group H only. Ideal Logic Combi - Installation and Servicing...

  • Page 5: Table Of Contents

    Condensate drain ............. 22 Heat input ...........to be calculated For all boilers: complete, sign & hand over to customer For assistance see Technical Helpline on the back page NOTE TO ThE INsTaLLER: COMPLETE ThE BENChMaRK COMMIssIONING ChECKLIsT aND LEaVE ThEsE INsTRUCTIONs WITh aPPLIaNCE Ideal Logic Combi - Installation and Servicing...

  • Page 6: Safe Handling

    The heat exchanger is manufactured from cast aluminium. Operatives should be knowledgeable in handling techniques when performing these tasks and the following precautions The boiler is suitable for connection to fully pumped, sealed should be considered: heating systems ONLY. Adequate arrangements for completely draining the system by provision of drain cocks MUST be provided • Grip the boiler at the base. in the installation pipework. • Be physically capable. Pipework from the boiler is routed downwards. • Use personal protective equipment as appropriate, e.g. gloves, safety footwear. During all manoeuvres and handling actions, every attempt should be made to ensure the following unless unavoidable and/ or the weight is light. • Keep back straight. • Avoid twisting at the waist. • Avoid upper body/top heavy bending. • Always grip with the palm of the hand. • Use designated hand holds. • Keep load as close to the body as possible. • Always use assistance if required. Ideal Logic Combi - Installation and Servicing...
  • Page 7 The manufacturer’s notes must NOT be taken, in any way, as • DHW Expansion Vessel Kit overriding statutory obligations. • Balcony Flue Kit IMPORTaNT. These appliances are CE certificated for safety • Security Bracket Kit and performance. It is, therefore, important that no external control devices, e.g. flue dampers, economisers etc., are • PRV Wall Outlet Kit directly connected to these appliances unless covered by • Pressure Gauge Extension Kit these Installation and Servicing Instructions or as otherwise recommended by Ideal stelrad Group in writing. If in doubt please enquire. Any direct connection of a control device not approved by Ideal stelrad Group could invalidate the certification and the normal appliance warranty. It could also infringe the Gas Safety Regulations and the above regulations. saFE haNDLING OF sUBsTaNCEs No asbestos, mercury or CFCs are included in any part of the boiler or its manufacture. Ideal Logic Combi - Installation and Servicing...

  • Page 8: Flue Installation

    The complete installation MUST be tested for gas tightness and it is modified for the purpose. purged as described in the above code. In both cases, details of essential features of cupboard / FLUE INsTaLLaTION compartment design, including airing cupboard installation, are to conform to the following: Pluming will occur at the terminal so terminal positions where this • BS 6798 (No cupboard ventilation is required - see ‘Air Supply’ could cause a nuisance should be avoided. for details). The flue must be installed in accordance with the recommendations of BS. 5440-1: 2008. • The position selected for installation MUST allow adequate In IE refer to I.S. 813:2002. space for servicing in front of the boiler. The following notes are intended for general guidance: • For the minimum clearances required for safety and subsequent service, see the wall mounting template and 1. The boiler MUST be installed so that the terminal is exposed Frame 1. In addition, sufficient space may be required to to external air. allow lifting access to the wall mounting plate. Ideal Logic Combi - Installation and Servicing...

  • Page 9: Air Supply

    14. From a single wall face. 300mm (12”) From corner walls. 300mm (12”) Any external runs must be in accordance with BS 6798. 15. Below velux window 2000mm (79”) The drain outlet on the boiler is sized for standard 21.5mm (3/4”) 16. Above or side of velux window 600mm (24”) overflow pipe. It is a universal fitting to allow use of different brands of pipework. * Only one reduction down to 25mm is allowable per installation otherwise BS5440-1 2008 dimensions must be followed. Ideal Logic Combi - Installation and Servicing...
  • Page 10 6.0 m 300 mm This must be obtained with an easily removable panel, to enable 6.5 m 6.5 m N/A 320 mm the consumer to view the system pressure gauge, and to provide 7.0 m 7.0 m N/A 330 mm the 100mm clearance required for servicing. 7.5 m 7.5 m N/A 345 mm 8.0 m 8.0 m N/A 360 mm 8.5m N/A N/A 370 mm REaR FLUE ONLy 9.0 m N/A N/A 385 mm MIN. Top clearance required = 165 mm Ideal Logic Combi - Installation and Servicing...

  • Page 11: Pump

    Thoroughly flush out the whole system with cold b. Where access to a ‘make-up’ vessel would be difficult, by water. pre-pressurisation of the system. b. Fill and vent the system until the pressure gauge The maximum cold water capacity of the system should registers 1bar and examine for leaks. Refer to Frame not exceed 143 litres, if not pressurized. However, if 30 for filling detail. the system is to be pressurized, the efficiency of the expansion vessel will be reduced and a larger vessel Check the operation of the safety valve by raising the (or smaller system volume) may be necessary. If the water pressure until the valve lifts. This should occur capacity of the vessel is not considered sufficient for this, within 0.3bar of the preset lift pressure. or for any other reason, an additional vessel MUST be d. Release water from the system until the installed on the return to the boiler. minimum system design pressure is reached; Guidance on vessel sizing is given in Frame 2. 1.0 bar if the system is to be pre-pressurised. continued ..Ideal Logic Combi - Installation and Servicing...

  • Page 12: Domestic Hot Water

    The Logic Combi range of boilers have an ALUMINIUM alloy In hard water areas where mains water can exceed 200ppm Total heat exchanger. Hardness (as defined by BS 7593:2006 Table 2) a scale reducing device should be fitted into the boiler cold supply within the IMPORTaNT. requirements of the local water company. The use of artificially The application of any other treatment to this product may softened water, however, is not permitted. render the guarantee of Ideal stelrad Group Invalid. Ideal stelrad Group recommend the use of Fernox Quantomat, Sentinel Combiguard and Calmag CalPhos I scale reducing Ideal stelrad Group recommend Water Treatment in devices together with Scalemaster In-line Scale Inhibitor branded accordance with the Benchmark Guidance Notes on Water Treatment in Central Heating Systems. Ideal, which must be used in accordance with the manufacturers’ instructions. If water treatment is used Ideal stelrad Group recommend only...
  • Page 13 Boiler Chip Card (BCC) MUST also be purchased for your specific boiler range and output. Check boiler serial letter code on data plate to obtain correct BCC. 302* BCC* Ideal Logic Combi - Installation and Servicing...

  • Page 14: Unpacking

    Flow Valve Pack Accessory Pack 1. Screw (x2) 2. Wallplug (x2) Flow Valve Pack 1. Pipe CH Flow 2. Washer CH 3. Valve Flow (with gauge) 3G9627b continued ..Ideal Logic Combi - Installation and Servicing...

  • Page 15: Front Panel Removal

    INsTaLLaTION UNPaCKING CONT’D Pack B Contents Telescopic Telescopic flue terminal Flue turret Rubber terminal wall seal Screw Sealing Tape Wall Seal (white) Pack B Contents Non-Telescopic Flue terminal Flue turret Rubber terminal wall seal Cutting Aid Wall Seal (white) FRONT PaNEL REMOVaL 1. Loosen the 2 screws retaining the front panel. 2. Pull the two spring clips downwards to disengage. 3. Pull the front panel forward and upwards to remove. Ideal Logic Combi - Installation and Servicing...
  • Page 16 (Centre line of turret to outside of wall terminal) sIDE FLUE REaR FLUE Wall Thickness X 155 mm 197mm 197mm 155 + S = 200mm Side flue length L Wall Thickness X 197mm 197mm continued ..Ideal Logic Combi - Installation and Servicing...
  • Page 17 ** Logic Combi 30 is capable of 8m flue only 12 FLUE assEMBLy - Exploded View An optional flue duct extension kit is required for wall thicknesses greater than : side 378mm Rear 420mm LEGEND The flue terminal MUST 1. Duct assembly. be fitted with the ‘TOP’ 2. Flue turret. uppermost to allow the correct fit and use of 3. Turret clamp. the plume management telescopic b Pack shown system. Ideal Logic Combi - Installation and Servicing...
  • Page 18 Side flue only 1. Cut the flue hole (preferably with a 5” core boring tool), 5" diameter hole 5" diameter hole ensuring that the hole is square to the wall. Both wall faces immediately around the cut hole should be flat. 2. Drill 2 holes with a 7.5mm / 8mm masonry drill and insert Section the plastic plugs, provided, for the wall mounting plate. through wall 3. Locate 2 No.14 x 50mm screws in the wall mounting plate Note. Check all of the hole positions before drilling. (one at each side, in any of the 3 holes provided at each side) and screw home. Ideal Logic Combi - Installation and Servicing...
  • Page 19 45mm to ‘X’ the measured wall thickness when marking the flue (this will allow for the fitted Frame). X + 75 1. Measure and note wall thickness x. Refer to Frame 10. 2. Add 75mm to dimension x and set telescopic flue length as indicated in drawing. 3. Using a 3.5mm drill bit, drill one hole in outer air duct taking care not to pierce plastic inner flue. Measurement to be taken from this point 4. Fix to length using self tappers provided. 5. Seal outer air duct using the tape provided. nm8944 Ideal Logic Combi - Installation and Servicing...
  • Page 20 Pack D Flue extension duct kit contents Flue support cutting aid Extension duct & clamp (shown folded up) 1.0m (39") long Wall plugs - 4 off Flue duct support nm8732 No. 10 x2" wood screw - 4 off Ideal Logic Combi - Installation and Servicing...
  • Page 21 Terminal grille Boiler not use mineral based oils. nm8762 20 FITTING ThE KIT If the telescopic flue terminal is used it is not always necessary 5. If the remainder Y is 500mm - 950mm it will be necessary to cut an extension pack. to use a further ‘D’ pack cut to 400mm. 1. Measure the total flue length ‘L’ from the centre of the boiler 6. If the remainder Y is less than 300mm, shorten the outlet to the outside wall. previous ‘D’ pack to suit required length and adjust the telescopic terminal. 2. Subtract 65mm from this dimension. 7. Measure and mark the length on the flue, to ensure a 3. Subtract 950mm for each ‘D’ pack to be used. square cut mark the flue all the way around and cut to 4. If the remainder Y is 300mm - 500mm this can be taken up length. by the adjustment in the telescopic flue. 3G9616 Ideal Logic Combi - Installation and Servicing...

  • Page 22: Safe Handling

    Introduction section for safe handling advice), locating it over the two tabs. Example of fixing esp9496 esp9497 23 CONDENsaTE DRaIN Ensure that the siphon is full of water before commissioning the boiler. The routing of the drain must be made to allow a minimum fall of 1 in 20 away from the boiler, throughout its length. The drainage pipework must be arranged so that obstruction (e.g. through freezing) of external drainage pipe does not give rise to spillage within the dwelling. IMPORTaNT. All pipework and fittings in the condensate drain system must be made of plastic. No other materials may be used. The drain outlet on the boiler is standard 21.5mm overflow pipe and is suitable for either push fit or solvent weld applications. This size must not be reduced in any part of its length. The boiler includes as standard, a 75mm condensate trap. The condensate trap also includes a siphon to reduce the possibility of freezing in the drain outlet. If external condensate pipe run is greater than 3m then pipe should be 32mm nominal diameter. Consideration should be given to insulating external condensate pipe runs. Condensate Drain Ideal Logic Combi - Installation and Servicing...
  • Page 23 5. TERMINaTION TO DRaIN / GULLy External External wall wall Open end of pipe Termination BOILER BOILER direct into gulley to Soak away below grating but above water level cla7775 cla7774 Ground Level Ground Level minimum DRAIN 500mm Ideal Logic Combi - Installation and Servicing...
  • Page 24 & fully engaged into plastic top flue manifold then locate the flue turret into the flue manifold and secure by applying downward pressure. 5. Engage the clamp in its slide mechanism and push it horizontally backwards 6. Locate BOTH plastic pegs BEFORE the front retaining clip is fully located. Note - Flues over 1 metre long It is recommended that a support bracket is fitted for every 1 metre of extension pipe used and a bracket should be used at every joint, to ensure pipes are held at the correct angle. Flue Outlet Retaining Clip (assembled) Plastic Pegs 204626-9847new (assembled) 3G9847e Ideal Logic Combi - Installation and Servicing...
  • Page 25 Vertical connector elbow UIN 203132 UIN 152259 UIN 204645 UIN 203130 elbow UIN 203131 Flue Flue Seal Collar - Tile Roof duct UIN 152258 support Roof Flue Extension Duct UIN 203129 Flue duct support Ideal Logic Combi - Installation and Servicing...

  • Page 26: Flue Terminal Position

    Minimum Dimension Directly below an opening, air brick, windows, etc. 300 mm Note. Below plastic / painted gutters 300 mm The equivalent flue length resistance of the elbow kits are: Painted surface 300 mm elbow kit = 1m Below eaves or balcony 500 mm elbow kit = 0.6m Below velux windows 2000mm Above or side of velux windows 600mm Ideal Logic Combi - Installation and Servicing...
  • Page 27 Note. Check the position of the inner flue duct relative to the outer duct on the assembled extension duct(s) and ensure the terminal flue duct is cut longer than the air duct to ensure engagement in the final flue duct seal. 7. Finally ensure the roof flashing plate is correctly sealed to the roof. Ideal Logic Combi - Installation and Servicing...
  • Page 28 Isolation handles Supply shown in the closed position Inlet Return Black Handle Blue Yellow Handle Handle Note that all isolation handles Safety are shown in the open postion. Drain Valve Black Handle Black Handle Filling 204626-00010246 Loop Ideal Logic Combi - Installation and Servicing...

  • Page 29: Electrical Connections

    - Combined 24 hour mechanical timer and room thermostat with wireless communication to receiver unit 3. If room stat has a neutral connection, connect this to terminal which fits into control box of the boiler. N (load) in the fused spur. RF Electronic Programmable Room Thermostat (7 FROsT ThERMOsTaT - WIRING day) kit - Combined 7 day timer and room thermostat If parts of the system are vulnerable to freezing or the with wireless communication to receiver unit which fits programmer is likely to be left off during cold weather, a frost stat into control box of the boiler. Features English language should be fitted in conjunction with a pipe thermostat. installation help messages. Also OpenTherm Control for 1. Position the frost thermostat in a suitable position, i.e. area gas consumption saving. vulnerable to freezing. 2. Connect frost stat across terminals marked frost stat as shown in diagrams A and B - see Frame 34. Ideal Logic Combi - Installation and Servicing...

  • Page 30: Wiring Diagram

    Earths are not shown for clarity but must Note. If the boiler is installed in a garage it may be necessary to fit a pipe never be omitted. thermostat, preferably on the return pipework. Ideal Logic Combi - Installation and Servicing...

  • Page 31: Wiring Diagram

    INsTaLLaTION 36 WIRING DIaGRaM Ideal Logic Combi - Installation and Servicing...

  • Page 32: Commissioning And Testing

    Drain Test Point gas appliances in the property Handle Valve working. Black Handle 3G9927 aTTENTION ! IT Is a CONDITION OF ThE MaNUFaCTURERs WaRRaNTy ThaT ThE BENChMaRK COMMIssIONING ChECKLIsT Is FULLy COMPLETED aND LEFT WITh ThE aPPLIaNCE Ideal Logic Combi - Installation and Servicing...

  • Page 33: Ideal Logic Combi - Installation And Servicing

    DOMEsTIC hOT WaTER blinking, alternating with a number or letter to show 11. With the boiler firing, set the DHW Temp Control knob (B) to which error is detected. maximum and fully open a DHW tap. Note: Boiler frost protection - boiler fires if temperature is The boiler should continue to run and the LED display (E) should below 5 degrees C. show status Note. The boiler incorporates a fan overrun cycle which 12. Ensure that with the boiler operating the dynamic gas pressure is MUST NOT be prematurely interrupted by isolation of the able to obtain maximum output. Refer to Table 2. mains electricity supply. Ideal Logic Combi - Installation and Servicing...

  • Page 34: General Checks

    2. Fully open a DHW tap and check that hot water is delivered. Knob setting Ch Flow Temp DhW Outlet Temp The display should read: Max 80 (176) 64 (147) 3. Gas Rate Min 45 (113) 40 (104) Check the boiler gas rate when the boiler is at full DHW output. Check at the gas meter, with no other appliance in use. Refer to Tables 2 & 3 for gas rates. 4. Close the DHW tap. 5. Set the central heating external controls to OFF. The burner should go off and the pump continue to run for two minutes The display should read: 6. Check the correct operation of the timer (if fitted) and all other system controls. Operate each control separately and check that the main burner responds. Ideal Logic Combi - Installation and Servicing...

  • Page 35: Handing Over

    “additionally, the temperature can be controlled by the by a Registered Gas Installer (RGII). user via the draw-off tap: the lower the rate the higher the temperature, and vice versa”. 12. Inform the householder of the guarantee/registration found within the envelop pack and the requirement to register it to 5. Explain the function of the boiler fault mode. receive the full benefit of the warranty. Emphasise that if a fault is indicated refer to “Fault Codes” in the User Guide. 6. Explain and demonstrate the function of time and temperature controls, radiator valves etc., for the economic use of the system. 7. If a timer is fitted draw attention to the timer Users Ideal Logic Combi - Installation and Servicing...

  • Page 36: Servicing Schedule

    Do noT oPeraTe the boiler if the front panel is not fitted. 8. If, for any reason, the condensate trap/siphon has been removed ensure the trap is refilled with water before reassembling. 9. Check the gas consumption. 10. Check combustion by connecting the flue gas analyser to the flue gas sampling point as shown in the diagram and measure CO & CO If the CO/CO ratio is greater than 0.004 AND the integrity of the complete flue system and combustion circuit seals have been verified and the inlet gas pressure (and gas rate) have been verified, then contact Ideal. 11. Complete the service section in the Benchmark Commissioning Checklist. Flue Sampling Point Ideal Logic Combi - Installation and Servicing...

  • Page 37: Boiler Front Panel Removal/Replacement

    Flue sampling point view from top of boiler 44 FaN aND VENTURI assEMBLy REMOVaL aND CLEaNING 1. Disconnect the electrical leads from the fan. 2. Undo the gas pipe union connection to the injector housing. 3. Remove the extended nut on the fan mounting bracket. 4. Lift off fan and venturi assembly. 5. Inspect the injector for blockage or damage. 6. Inspect fan outlet sealing gasket and replace if necessary. Injector Ideal Logic Combi - Installation and Servicing...

  • Page 38: Burner Removal And Cleaning

    6. Brush off any deposits that may be on the ceramic with a SOFT brush. 7. Inspect the sealing gasket around the burner for any signs of damage. Replace as necessary. 46 CLEaNING ThE CONDENsaTE TRaP/sIPhON 1. Pull off the rubber pipe at the sump drain. 4. Clean siphon with water. 2. Disconnect the condensate drain pipe. 5. Re-assemble in reverse order. 3. Turn the siphon clockwise to disengage and lift to B When re-assembling ensure the trap is full of water. remove. Note. Keep siphon upright when removing 3G9690 Ideal Logic Combi - Installation and Servicing...

  • Page 39: Cleaning The Heat Exchanger

    Reassemble the boiler in the following order: 1. Ensure that the condensate trap/siphon is full of water. 6. Refit the sump cover. 2. Refit the burner ensuring the sealing gasket is correctly 7. Refit the boiler front panel. positioned and free from damage (tighten the 4 fixing screws IMPORTaNT. Ensure that the boiler front panel is in the sequence shown below). correctly fitted and that a good seal is made. 3. Refit the fan / venturi assembly ensuring the retaining tabs 8. Swing the control box back into its working position and are correctly positioned and the sealing gasket is correctly secure. positioned and free from damage. 9. Turn on the gas supply at the gas service cock. 4. Reconnect the fan electrical leads. 10. Reconnect the electrical supply. 5. Remove the sump cover and refit the lower flue manifold as shown. Ideal Logic Combi - Installation and Servicing...

  • Page 40: Replacement Of Components

    5. Lift and remove the fan and venturi assembly. 6. Remove the screw and twist venturi anti- clockwise to remove venturi assembly, noting the orientation of the venturi in relation to the fan body. 7. Transfer the venturi assembly to the new fan, replacing the ‘o’ ring if evidence of damage or deterioration is visible. 8. Fit the new fan / venturi assembly ensuring the retaining tabs are correctly positioned and the fan outlet sealing gasket is correctly positioned and free from damage. Refit the extended nut. 9. Reassemble the boiler in reverse order, taking care not to overtighten the screw on the fan mounting bracket. 10. Check the operation of the boiler. Refer to Frames 38 & 39. Ideal Logic Combi - Installation and Servicing...
  • Page 41 8. Fit the new injector housing complete with injector. 9. Reassemble in reverse order, ensuring that the new gas seal supplied is located correctly in the injector housing. 10. Check operation of the boiler. Refer to Frames 38 & 39. 52 BURNER REPLaCEMENT 1. See Frame 49. 2. Refer to Frame 50. 3. Undo the two screws and remove the sump cover. 4. Lift the manifold to clear the bottom sealing gasket and remove manifold. 5. Remove the 2 front fixing screws and loosen the 2 rear extended nuts. 6. Lift off the burner from the combustion chamber. To facilitate the removal angle the burner as shown. 7. Fit the new burner, replacing any damaged or deteriorating sealing gasket. 8. Reassemble in reverse order. 9. Check the operation of the boiler. Refer to Frames 38 & 39. Ideal Logic Combi - Installation and Servicing...
  • Page 42 54 IGNITION ELECTRODE REPLaCEMENT 1. Refer to Frame 49. 2. Remove the burner. Refer to Frame 52. 3. Unplug the ignition lead from the electrode. Ignition Electrode 4. Remove the earth lead from the ignition electrode. 5. Remove the 2 screws holding the ignition electrode to the combustion chamber. 6. Remove the electrode. 7. Fit the new ignition electrode, using the new gasket supplied. Check dimensions as shown. 8. Reassemble in reverse order. 9. Check the operation of the boiler. Refer to Frames 38 & 39. a i g Spark Gap S t r 3.5mm Ideal Logic Combi - Installation and Servicing...
  • Page 43 57 Gas CONTROL VaLVE REPLaCEMENT 1. Refer to Frame 49. 1. Refer to Frame 49. 2. Disconnect the leads from the spark generator. 2. Unplug the electrical lead connection from the gas control 3. Remove the M5 screws securing the spark generator valve and disconnect the earth wire. to the boiler chassis. 3. Undo the union nut on the outlet of the gas control valve. 4. Fit the new spark generator and re-assemble in 4. Undo the gas inlet pipe union at the inlet to the gas control valve. reverse order ensuring the two earth leads are 5. Loosen the back nut retaining the valve to the bracket and correctly replaced. withdraw the valve forwards. 5. Check operation of the boiler. Refer to Frames 38 & 39. 6. Fit the new gas control valve ensuring the two sealing washers are in place and reconnect gas and electrical connections. 7. Check operation of the boiler. Refer to Frames 38 & 39. Spark Generator Ideal Logic Combi - Installation and Servicing...

  • Page 44: Diverter Valve Actuator Replacement

    4. Fit new actuator head and reassemble in reverse order. 6. Check operation of the boiler. Refer to Diverter Valve Actuator Frames 38 & 39. Retaining Clip 59 CONDENsaTE TRaP/sIPhON REPLaCEMENT 1. Refer to Frame 49. 2. Pull off the rubber pipe at the sump drain. 3. Disconnect the condensate drain pipe. 4. Turn the siphon clockwise to disengage and lift to remove. Note. Keep siphon upright when removing 5. Clean siphon with water. 6. Re-assemble in reverse order. 7. When re-assembling ensure the trap is full of water. 8. Check operation of the boiler. Refer to Frames 38 & 39 Siphon 3G9690 Ideal Logic Combi - Installation and Servicing...
  • Page 45 Note. Fit the earth strap provided with the PCB to your wrist and a suitable earth on the boiler chassis. 1. Refer to Frame 49. 2. Remove the main PCB, refer to Frame 60. 3. Unclip the PCB and lift to clear the mounting posts. 4. Fit the new PCB ensuring the 4 potentiometer spindles line up with the control knobs which must be in a vertical position. 5. Reassemble in reverse order. 6. Check operation of the boiler. Refer to Frames 38 & 39. Potentiometer spindle Control Knobs (to be in vertical position) Ideal Logic Combi - Installation and Servicing...

  • Page 46: Draining The Boiler

    1. Refer to Frame 49. 2. Close all the DHW water isolating valves on the boiler inlet. 3. To drain the domestic hot water circuit: As there is no direct drain for the domestic hot water circuit, depending on the location of the boiler, opening the lowest hot water tap may drain this circuit. However it must be noted that some residual water will be experienced during replacement of components. 4. After replacing any component on the boiler, close tap, close the drain valve and open all system isolating valves (re-pressurise as appropriate by re-connecting the filling loop, refer to Frame 30) before proceeding to check operation of the boiler. 5. Disconnect filling loop. Refer to Frame 30. 6. Check operation of the boiler. Refer to Frames 38 & 39. 63 PREssURE GaUGE RENEWaL 1. Refer to Frame 49. 2. Drain the heating system. Refer to Frame 62. 3. Unscrew the pressure gauge and discard. 4. Fit new pressure gauge, using suitable jointing compound. 5. Refill the boiler. Refer to Frame 30. 6. Check operation of the boiler. Refer to Frames 38 & 39. 3G9690 Ideal Logic Combi - Installation and Servicing...
  • Page 47 8. Refill the boiler. Refer to Frame 30. Check for leaks around the new air vent joint. 9. Check the operation of the boiler. Refer to Frames 38 & 39. 66 DhW FLOW TURBINE CaRTRIDGE REPLaCEMENT 1. Refer to Frame 49. 2. Drain the boiler. Refer to Frame 62. 3. Remove condensate trap/siphon. Refer to Frame 59. 4. Remove the DHW flow turbine sensor. Refer to Frame 61. 5. Unscrew the top connection to access the internal part. 6. Fit the new turbine cartridge. 7. Refit the turbine flow sensor 8. Reassemble in reverse order. 9. Refill the boiler. Refer to Frame 30. 10. Check operation of the boiler. Refer to Frames 38 & 39. Ideal Logic Combi - Installation and Servicing...
  • Page 48 7. Fit the new plate heat exchanger, using the new o-rings 9. Check operation of the boiler. Refer to Frames 38 & 39. supplied. Note. The mounting pins are offset so the correct position can be defined from the location of the holes on the brass mounting. 8. Reassemble in reverse order. 9. Refill the boiler. Refer to Frame 30. 10. Check operation of the boiler. Refer to Frame 38 & 39. Ideal Logic Combi - Installation and Servicing...
  • Page 49 8. Reassemble in reverse order. 8. Refill the boiler. Refer to Frame 30. 9. Refill the boiler. Refer to Frame 30. 9. Check Operation of the boiler. Refer to Frames 38 & 39. 10. Check Operation of the boiler. Refer to Frames 38 & 39. 72 FLOW ThERMIsTOR REPLaCEMENT 1. Refer to Frame 49. 2. Drain down the boiler. Refer to Frame 62. 3. Unplug the electrical lead. 4. Unscrew the thermistor (to facilitate removal a 13mm socket spanner should be used). 5. Fit the new thermistor using the sealing washer provided. 6. Reassemble in the reverse order. 7. Refill the boiler. Refer to Frame 30. 8. Check the operation of the boiler. Refer to Frames 38 & 39. Ideal Logic Combi - Installation and Servicing...
  • Page 50 13. Remove the condensate rubber pipe. Refer to Frame 59, no. 2. 4. Remove the burner and place on one side. Refer to Frame 14. Remove the two heat exchanger fixing screws. 15. Remove the Heat exchanger, slide out of location bracket. 5. Remove the ignition and detection electrodes and divertor 16. Reassemble in reverse order, ensuring the heat exchanger LH actuator head. Refer to Frames 54, 55 and 58. retaining bracket is correctly positioned. Replace any new ‘o’ 6. Remove the spark generator. Refer to Frame 56. rings supplied with new heat exchanger and replacing gaskets or seals if any sign of damage is evident. When replacing the 7. Remove the gas valve. Refer to Frame 57. spring clips located on the return pipe connection, ensure clip is 8. Remove the expansion vessel. Refer to Frame 74. oriented to correctly match connecting pipe diameters. 9. Remove the flow thermistor. Refer to Frame 72. 17. Ensure the trap/siphon is filled with water. Refer to Frame 59. 10. Remove the 2 M5 screws retaining the gas valve mounting 18. Refill the boiler. Refer to Frame 30. bracket and transfer bracket to the new heat exchanger. 19. Check operation of the boiler. Refer to Frames 38 & 39. Ideal Logic Combi - Installation and Servicing...
  • Page 51 75 BOILER sEaLING PaNEL sEaL REPLaCEMENT 1. Refer to Frame 49. 2. Remove the old seal from the casing and thoroughly clean the casing surfaces. 3. Fit the new seal, ensuring the bottom joint provides an air tight seal. 5. Reassemble in reverse order. 6. Check operation of the boiler. Refer to Frames 38 & 39. Note. Ensure that the boiler front panel is correctly sealed, compressing the seal to make an airtight joint. Ideal Logic Combi - Installation and Servicing...

  • Page 52: Fault Finding

    Note that production boiler PCBs are factory pre-set to operate for boiler range and output, but when ordering Primary PCB as a spare, an additional Boiler Chip Card (BCC) MUST also be purchased for your specific boiler range and output. **If PCB replaced as a spare ensure that the BCC (boiler chip card - small plastic part) is fitted to the PCB otherwise replace PCB. REsET PROCEDURE - To reset boiler, turn mode knob to reset position and immediately turn knob back to required setting. Ideal Logic Combi - Installation and Servicing...
  • Page 53 * note: due to the wave form of the rectified voltage, the reading will vary depending on the type of meter used to measure the value. In general terms a reading greater than 150V indicates that the correct voltage is supplied to the gas valve. REsET PROCEDURE - To reset boiler, turn mode knob to reset position and immediately turn knob back to required setting. Ideal Logic Combi - Installation and Servicing...
  • Page 54 79 aLTERNaTING ‘L’ aND ‘6’ - FaLsE FLaME LOCKOUT Check routing and integrity of internal boiler Reset the boiler, does Boiler Work OK? wiring is OK. Check condition of Flame Sense Electrode and replace if deteriorated. Separate the flame detection electrode in-line Replace Flame Detection Electrode connector. Is there continuity between the terminals pins connected to the electrode? Check routing and integrity of internal boiler wiring. REsET PROCEDURE - To reset boiler, turn mode knob to reset position and immediately turn knob back to required setting. 80 aLTERNaTING ‘F’ aND ‘1’ - LOW WaTER PREssURE Are the Boiler and CH System filled with water and Fill and vent the system and open all isolation valves all isolation and radiator valves open (check pressure gauge is between 1 to 1.5 bar)? Are connections on water pressure sensor secure? Re-fit connections Replace water pressure sensor Ideal Logic Combi - Installation and Servicing...
  • Page 55 In general terms a reading greater than 150V indicates that the correct voltage is supplied to the gas valve. 82 aLTERNaTING ‘F’ aND ‘3’ - FaN FaULT Does the wiring from the Fan to the PCB have Rectify Wiring & secure connections at both ends and has not connections deteriorated? Does the wiring have continuity? Is there 230Vac at the Blue and Brown connections Replace PCB to the 3 way connection on the Fan? Replace Fan Ideal Logic Combi - Installation and Servicing...
  • Page 56 84 aLTERNaTING ‘F’ aND ‘5’ - RETURN ThERMIsTOR FaULT Remove the Return Thermistor from the CH Return Pipe and disconnect the wires. Check the resistance using a suitable multimeter Fit a new Thermistor connected across the thermistor’s terminal pins. At 25 C expect 9,700 - 10,300 Ohms At 60 C expect 2,400 - 2,600 Ohms At 85 C expect 1,000 - 1,100 Ohms Is the Thermistor value correct? Is there continuity between the PCB and the Thermistor? Check and replace wiring as necessary Replace PCB Ideal Logic Combi - Installation and Servicing...
  • Page 57 Is the Outside Sensor value correct? Securely connect the wiring at the Terminal Block and the PCB Is the wiring securely connected between the incoming terminal block boiler connection of the Outside Sensor and the PCB? Replace PCB 86 aLTERNaTING ‘c’ aND ‘2’ - BCC FaULT (BOILER ChIP CaRD) Securely insert the correct BCC for the boiler Is the correct BCC for the boiler securely inserted into the into the PCB and after switching power on and slot at the front left of the PCB? ‘c0’ being shown, reset boiler. (identified by the label on the BCC) Note. Ensure the correct orientation of BCC by placing “TOP” side up. Replace the BCC with a new BCC (that is correct for the boiler). After switching power on and ‘c0’ being shown, Replace PCB press reset. Is ‘c2’ still shown? REsET PROCEDURE - To reset boiler, turn mode knob to reset position and immediately turn knob back to required setting. Ideal Logic Combi - Installation and Servicing...
  • Page 58 FaULT FINDING 87 NO Ch OPERaTION BUT hW WORKs OK Move the mode knob to the Winter position Is the mode knob in the Winter position? Are the Timer and the Room Thermostat switched Switch the Timer and Room Thermostat On Open the Radiator Valves Are the Radiator Valves Open? There is no Voltage from the Timer/Room Stat. This Is there 230Vac at (A)? is not boiler fault. Ensure Voltage is supplied to boiler by rectifying external wiring. Replace the Divertor Valve Ideal Logic Combi - Installation and Servicing...
  • Page 59 Re-engage diverter secured onto waterset. head and secure clip to Remove the turbine, and wateset check for debris in the turbine & filter. Replace Replace PCB turbine if necessary. Is Is diverter stuck in the CH position DHW OK? Check and replace diverter valve motor head. Replace turbine sensor Is Boiler DHW OK? Change diverter Valve cartridge - rear section Re-connect wiring 89 NO DIsPLay Supply power to the boiler Is there 230Vac to the boiler at L and N? Is the wiring from the terminal block to the Main PCB Connect the wiring from the terminal block to the connected securely? Main PCB securely. Is the ribbon cable from the main PCB to the User Connect the ribbon from the main PCB to the User Interface PCB connected securely? Interface PCB securely Replace the Is ribbon cable damaged? User Interface Replace ribbon cable Ideal Logic Combi - Installation and Servicing...

  • Page 60: Short List Of Parts

    When replacing any part on this appliance use only spare parts that you can be assured conform to the safety and performance specification that we require. Do not use reconditioned or copy parts that have not been clearly authorised by Ideal.
  • Page 62 Failure to install and commission according to the manufacturer’s instructions and complete this Benchmark Commissioning Checklist will invalidate the warranty. This does not affect he customer’s statutory rights. Gas Safe Register Number Telephone Number If yes, and if required by the manufacturer, has a water scale reducer been fitted? If the condensate pipe terminates externally has the pipe diameter been increased and weatherproof insulation fitted?
  • Page 63 Gas Safe Register Number Gas Safe Register Number Gas Safe Register Number Gas Safe Register Number Gas Safe Register Number Gas Safe Register Number Gas Safe Register Number Gas Safe Register Number Gas Safe Register Number Gas Safe Register Number...
  • Page 64 Technical Training The Ideal Technical Training Centre offers a series of first class training courses for domestic, commercial and industrial heating installers, engineers and system specifiers. For details of courses please ring:.... 01482 498 432 Manufactured under an ISO 9001 the code of practice for the installation, registered quality management system commissioning & servicing of central heating systems FM 59915 Ideal, P.O. Box 103, National Ave, Kingston upon Hull, HU5 4JN. Telephone: 01482 492 251 Fax: 01482 448 858. Registration No. London 322 137. Ideal stelrad Group pursues a policy of continuing improvement in the design and performance of its products. The right is therefore reserved to vary specification without notice. Ideal Installer/Technical Helpline: 01482 498 663 www.idealheating.com...

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Logic combi 35Logic+ combi 30

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