IDEAL Logic+ Combi 24 Installation And Servicing

Hide thumbs Also See for Logic+ Combi 24:

Installation and servicing (72 pages)

User manual (21 pages)

Installation manual (8 pages)

Table Of Contents

Table of Contents

Quick Links

Need help?

Do you have a question about the Logic+ Combi 24 and is the answer not in the manual?

Questions and answers

David

February 19, 2025

I have a Logic + Heat H24 boiler. It is running continuously and independent of either the thermostat (checked and working) or the controller (brand new). It has been the case in-the last 3 days. Any suggestions?

1 comments:

Mr. Anderson

February 19, 2025

The IDEAL Logic+ Combi 24 boiler may be running continuously despite a working thermostat and new controller because the boiler comes pre-fitted with a link wire between the room thermostat/Timer connections on the terminal strip. This link wire creates a permanent call for heat and must be removed when adding a room thermostat or programmer. If the link wire is still in place, the boiler will continue to operate as if there is a constant demand for heating. To fix this, isolate the mains supply, access the terminal strip, and ensure the link wire has been removed.

This answer is automatically generated

Summary of Contents for IDEAL Logic+ Combi 24

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.idealboilers.com where you can download the relevant information in PDF format.
Page 2 26.3 31.2 Annual Energy Consumption 74.9 74.9 74.9 Sound Power Level, Indoors 45.2 45.5 44.2 domestic Hot Water 0.177 0.177 0.173 elec ƞ 75.3 75.6 76.3 7.667 7.615 7.486 fuel 37.8 37.7 36.9 Ideal Logic Combi - Installation and Servicing...
Page 3 PRodUCt fiCHe loGiC + CoMbinAtion boileR Ideal Boilers eRP dAtA SyMbol UnitS Model Condensing boiler Seasonal Space heating efficiency class Rated heat output ƞ Seasonal space heating energy efficiency Annual energy consumption 74.9 Sound power level, indoors Water heating energy efficiency class...
Page 4 Ideal Logic Combi - Installation and Servicing...
Page 5 The boiler will repeat the ignition sequence if a heat demand is present doCUMent AMendMentS Relevant Installation changes implemented in this book from Mod Level ........A01 (Apr 15) Ideal Boilers reserve the right to vary specification without notice Ideal Logic Combi -...
Page 6 1 - General data Ideal Logic + Combi Gas supply 2H - G20 - 20mbar Gas Supply Connection 15mm copper compression Injector Size (mm) 4.15 4.65 Inlet Connection Domestic Hot Water 15mm copper compression Outlet Connection Domestic Hot Water...
Page 7 ContentS IDEAL LOGIC + COMBI Air Supply ..............11 natural Gas only Benchmark Commissioning Checklist ....68-69 boiler size G.C. Appliance no. Pi no. boiler Clearances ............12 (Benchmark No.) Boiler Exploded Diagram ........... 15 Condensate Drain ........11, 26, 27, 43...
Page 8: Safe Handling
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 9: Gas Safety Regulations
• Electronic Timer (7 day) kit enquire. • RF Mechanical Programmable Room Thermostat (24 hr) kit Any direct connection of a control device not approved by Ideal boilers could invalidate the certification and the normal appliance • RF Electronic Programmable Room Thermostat (7 day) kit warranty.
Page 10: Gas Supply
2. It is important that the position of the terminal allows the free Frame 1. In addition, sufficient space may be required to passage of air across it at all times. allow lifting access to the wall mounting plate. Ideal Logic Combi - Installation and Servicing...
Page 11: Air Supply
It is a universal fitting to allow use of different * Only one reduction down to 25mm is allowable per installation brands of pipework. otherwise BS5440-1 2008 dimensions must be followed. Ideal Logic Combi - Installation and Servicing...
Page 12 Bottom clearance after installation can be reduced to 5mm. This must be obtained with an easily removable panel, to enable the consumer to view the system pressure gauge, and to provide the 100mm clearance required for servicing. Ideal Logic Combi - Installation and Servicing...
Page 13: Pump
1.0 bar if the system is to be pre-pressurised. Guidance on vessel sizing is given in Table above. continued ..Ideal Logic Combi - Installation and Servicing...
Page 14: Domestic Hot Water
The application of any other treatment to this product softened water, however, is not permitted. may render the guarantee of Ideal Boilers Invalid. Ideal Boilers recommend the use of Fernox Quantomat, Sentinel Ideal Boilers recommend Water Treatment in accordance Combiguard,Calmag CalPhos I scale reducing devices or...
Page 15 PCB as a spare, an additional 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 16 Flow Valve Pack 1. Screw (x2) 2. Wallplug (x2) 3. Turret Clamp Screw (spare) Flow Valve Pack 1. Pipe CH Flow 2. Washer CH 3. Valve Flow (with gauge) continued ..Ideal Logic Combi - Installation and Servicing...
Page 17 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 18: Safe Handling
2. Lift the boiler onto the wall mounting plate (refer to the and the mounting bracket is level. Introduction section for safe handling advice), locating it over the two tabs. Example of fixing esp9496 Ideal Logic Combi - Installation and Servicing...
Page 19 (1000mm long) B Pack cut 75mm For Flue lengths between 658 & 708 use a Horizontal Flue Terminal (1000mm long) B Pack, cut 75mm off the end of the terminal section of the telescopic flue only. Ideal Logic Combi - Installation and Servicing...
Page 20 If using the 2000mm D Pack , the maximum usable length per extension is 1950mm If using the 500mm D Pack, the maximum usable length per extension is 450mm. Ideal Logic Combi - Installation and Servicing...
Page 21 4. Mark the inner tube 10mm longer than the outer tube around its circumference and cut following the mark to ensure its cut square. 5. Remove all burrs and place a light chamfer on the outer edge to aid assembly. Ideal Logic Combi - Installation and Servicing...
Page 22 6. Ensure all sample points are accessible and all sample plugs and caps are fitted. Retaining Clamp Lugs Sample points screw Flue Outlet A - Duct Assembly B - Flue Turret C - Turret Clamp D - Seal Flue Outlet Ideal Logic Combi - Installation and Servicing...
Page 23 UIN 203130 Vertical Connector elbow UIN 203131 Flue Seal Collar - Tile Roof Flue UIN 152258 duct support Roof Flue Extension Duct UIN 211037 (500mm) UIN 203129 (1000mm) UIN 211038 (2000mm) Flue duct support Ideal Logic Combi - Installation and Servicing...
Page 24: Flue Terminal Position
= 1m Where any vertical fanned draught chimney configuration outlet is within 2000mm measured horizontally of an opening window, then it shall be at least 300mm above elbow kit = 0.6m the opening. Ideal Logic Combi - Installation and Servicing...
Page 25 7. Finally ensure the roof flashing plate is correctly sealed to the roof. Ideal Logic Combi - Installation and Servicing...
Page 26 Boilers without 75mm sealed condensate trap must be fitted with condensate trap must be fitted with a 75mm trap and visible air break a 75mm trap and visible air break continued ..Ideal Logic Combi - Installation and Servicing...
Page 27: Installation And Servicing
≥ 500 a 75mm trap and visible air break 2 rows of three Ø12mm holes 25mm centres, 50mm from the bottom of the tube, facing away from the house Ideal Logic Combi - Installation and Servicing...
Page 28 For additional gas supply info refer to “Gas Supply” on page 10. 15mm elbow or fittings Safety Valve (not supplied) Drain Pipe Outlet CH Flow Supply Inlet Return Filling Loop Ideal Logic Combi - Installation and Servicing...
Page 29 Filling Positions shown Top Up Positions shown Filling Filling Plug Plug Loop Loop DHW Inlet DHW Inlet (Blue) (Blue) Filling Loop Filling Loop (Blue) (Blue) CH Return CH Return (Black) (Black) Ideal Logic Combi - Installation and Servicing...
Page 30: Electrical Connections
3mm (1/8”) contact separation in both poles. The Wiring external to the boiler MUST be in accordance with the means of isolation must be accessible to the user after current I.E.E. (BS.7671) Wiring Regulations and any local installation. regulations. Ideal Logic Combi - Installation and Servicing...
Page 31: Internal Wiring
6. Connect wires to terminal block, as shown below 7. Re-assemble in reverse order. Ideal offer 6 kits as follows: (see individual kits for installation instructions) Mechanical Timer (24 hr) Kit - 24 hour mechanical CH timer fits into the control box of the boiler. This can be fitted in conjunction with a room thermostat.
Page 32 The two wires from the weather compensation kit (outside sensor), must be ROOM Timer connected into the two right hand terminals as shown in diagram C. STAT/ TIMER Optional Frost Stat FROST STAT OPTIONAL OpenTherm Outside Sensor Harness Weather Compensation Ideal Logic Combi - Installation and Servicing...
Page 33: External Electrical Controls
Room Stat Frost Stat Earths are not shown for clarity but must never be omitted. Use of General Live for Room Stat Room Optional Stat Frost Stat Mains In Room Stat Frost Stat 3G9503 Ideal Logic Combi - Installation and Servicing...
Page 34: Wiring Diagram
INSTALLATION 30 WiRinG diAGRAM Ideal Logic Combi - Installation and Servicing...
Page 35: Commissioning And Testing
Benchmark Checklist completed. A flow chart to assist is provided on page 71. 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 36: Initial Lighting
When the burner is established the BLUE ‘Burner On’ neon (F) which MUST NOT be prematurely interrupted by will be illuminated, the LCD (E) will display “Central Heating” and isolation of the mains electricity supply. “Radiators XX C”. continued..Ideal Logic Combi - Installation and Servicing...
Page 37 Mode knob moved to summer position Summer Setting Central heating off Hot water on Mode knob moved to winter position Winter Setting Central heating on Hot water on Mode knob moved to restart position Restart Ideal Logic Combi - Installation and Servicing...
Page 38 Legend A. Domestic Hot Water Preheat On/Off Knob E. Boiler Status B. Domestic Hot Water Temperature Knob Burner ‘on’ Indicator C. Central Heating Temperature Knob H. Central Heating Economy Setting D. Mode Knob Ideal Logic Combi - Installation and Servicing...
Page 39 6. Balance the system. Refer to Frame 4. adjustment at the draw off tap : the lower the rate the higher the 7. Check the condensate drain for leaks and check that temperature, and vice versa. it is discharging correctly. Ideal Logic Combi - Installation and Servicing...
Page 40: Handing Over
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 Instructions and hand them to the householder. Ideal Logic Combi - Installation and Servicing...
Page 41: Servicing Schedule
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. Ensure all caps and seals 11. Complete the service section in the Benchmark Commissioning are re-fitted after use Checklist.
Page 42 4. Lift off fan and venturi assembly. 5. Undo the two M4 screws and release the nozzle assembly. 6. Inspect the injector for blockage or damage. 7. Inspect fan outlet sealing gasket and replace if necessary. Injector Ideal Logic Combi - Installation and Servicing...
Page 43: Burner Removal And Cleaning
2. Disconnect the condensate drain pipe. 5. Re-assemble in reverse order. 3. Turn the siphon clockwise to disengage and lift to When re-assembling ensure the trap is full of water. remove. note. Keep siphon upright when removing Ideal Logic Combi - Installation and Servicing...
Page 44: Cleaning The Heat Exchanger
9. Turn on the gas supply at the gas service cock. 4. Reconnect the fan electrical leads. 5. Remove the sump cover and refit the lower flue manifold as 10. Reconnect the electrical supply. shown. Ideal Logic Combi - Installation and Servicing...
Page 45: Replacement Of Components
‘o’ rings are in place 10. Check the operation of the boiler. Refer to Frames 32 & 36. Ideal Logic Combi - Installation and Servicing...
Page 46 7. Fit the new burner, replacing any damaged or deteriorating sealing gasket. 8. Reassemble in reverse order. Refer to Frame 44. 9. Check the operation of the boiler. Refer to Frames 32-36. Ideal Logic Combi - Installation and Servicing...
Page 47 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 32-36. Spark Gap 3.5mm a i g S t r Ideal Logic Combi - Installation and Servicing...
Page 48 5. Fit the new spark generator and re- assemble in reverse order ensuring that the the earth lead is replaced 6. Check operation of the boiler .Refer to Frames 32-36. Ideal Logic Combi - Installation and Servicing...
Page 49 7. Check the operation of the boiler. Refer to Frames 32-36. note. All spares will be delivered in mid-position therefore ignore point 5 and proceed to point 6 after re-connecting the inline connector. Ideal Logic Combi - Installation and Servicing...
Page 50 & b will be displayed then “Boiler Type Card Fault - Contact Installer” The correct BCC for this appliance will need to be fitted. 11. Check operation of the boiler. Refer to Frames 32- Ideal Logic Combi - Installation and Servicing...
Page 51 4. Using a suitable tool, lift and remove the retaining clip. 5. Use the clip to ease the turbine sensor from its housing. 6. Re-assemble in reverse order. 7. Check operation of the boiler. Refer to Frame 32-36. Ideal Logic Combi - Installation and Servicing...
Page 52 8. Reassemble in reverse order ensuring the retaining clip is correctly fitted, the pipe compression fitting retightened and return thermistor is re-clipped. 9. Refill the boiler. Check operation of the boiler. Refer to Frames 32-366. Ideal Logic Combi - Installation and Servicing...
Page 53 4. Using a pair of pliers, pull out the plastic filter/flow regulator. 5. Clean or replace filter as necessary. 6. Reassemble in reverse order. 7. Refill the boiler. 8. Check operation of the boiler. Refer to Frames 32-36. Ideal Logic Combi - Installation and Servicing...
Page 54 Ensure that the depressions are on the bottom prior to fitting. 8. Reassemble in reverse order. 9. Refill the boiler. Refer to Frame 24. 10. Check operation of the boiler. Refer to Frame 32-36. Ideal Logic Combi - Installation and Servicing...
Page 55 5. Fit the new thermistor using the sealing washer provided. 6. Reassemble in the reverse order. 7. Refill the boiler. Refer to Frame 24. 8. Check the operation of the boiler. Refer to Frames 32-36. Ideal Logic Combi - Installation and Servicing...
Page 56 20. Check operation of the boiler. Refer to Frames 32-36. 11. Undo the pump union nut and remove pipe. 12. Remove the two retaining spring clips and remove pipes. Shown as 180º position Ideal Logic Combi - Installation and Servicing...
Page 57 4. Reassemble in reverse order. 5. Check operation of the boiler. Refer to Frames 32-36. 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 58: Fault Finding
Boiler Chip Card (BCC) MUST also be purchased for your specific boiler range and output. ReStARt PRoCedURe - To restart boiler, turn mode knob to restart position and immediately turn knob back to required setting. Ideal Logic Combi -...
Page 59 In general terms a reading greater than 150V indicates that the correct voltage is supplied to the gas valve. ReStARt PRoCedURe - To restart boiler, turn mode knob to restart position and immediately turn knob back to required setting. Ideal Logic Combi -...
Page 60 * 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. Ideal Logic Combi -...
Page 61 2,400 - 2,600 Ohms At 85 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 62 Boiler Restart’ being shown, restart the boiler. Is ‘Boiler Type Card Fault’ still shown? ReStARt PRoCedURe - To restart boiler, turn mode knob to restart position and immediately turn knob back to required setting. Ideal Logic Combi - Installation and Servicing...
Page 63 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 64 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 65: Spare 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. Failure to do so could affect safety or performance of this appliance.
Page 67 Benchmark Commissioning and Servicing Section It is a requirement that the boiler is installed and commissioned to the manufacturers instructions and the data fields on the commissioning checklist completed in full. To instigate the boiler guarantee the boiler needs to be registered with the manufacturer within one month of the installation.
Page 68: Gas Boiler System Commissioning Checklist
GAS BOILER SYSTEM COMMISSIONING CHECKLIST This Commissioning Checklist is to be completed in full by the competent person who commissioned the boiler as a means of demonstrating compliance with the appropriate Building Regulations and then handed to the customer to keep for future reference. CONTROLS Programmable room thermostat Optimum start control...
Page 69: Service Record
SERVICE RECORD It is recommended that your heating system is serviced regularly and that the appropriate Service Interval Record is completed. Service Provider SERVICE 01 SERVICE 02 ² % ² % ² % ² % (Where Possible) (Where Possible) Signature Signature SERVICE 03 SERVICE 04...
Page 70 “Service Mode” “Minimum Output” “Move CH Knob to End” and the boiler output will be reduced to minimum. 5. The boiler will remain at minimum rate for 5 minutes before reverting to normal operation. Ideal Logic Combi - Installation and Servicing...
Page 71 0.2%? sampling point. Allow readings to stabilise before recording. Turn off appliance and call Ideal Technical Helpline for advice The appliance must not be commissioned until problems are identified CO level less and resolved. If commissioning cannot be fully completed, the appliance than 350ppm AND CO/CO must be disconnected from the gas supply in accordance with GSIUR.
Page 72 & servicing of central heating systems FM 59915 Ideal Boilers Ltd, 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 Boilers Ltd pursues a policy of continuing improvement in the design and performance of its products.

This manual is also suitable for:

Logic+ combi 35 Logic+ combi 30