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IDEAL LOGIC 18 - User Manual

IDEAL LOGIC 18
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USERS GUIDE
LOGIC + Heat
12, 15, 18, 24, 30
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 installation guide see reverse of book

Other manuals for IDEAL LOGIC 18

Questions and Answers

  • K
    Kevin AyalaAug 17, 2025
    What to do if my IDEAL LOGIC 18 has no central heating or hot water?
    • M
      Meghan FrancisAug 17, 2025
      If your IDEAL Boiler isn't providing central heating or hot water, first, make sure the mains switch (fused spur) is turned on and the mode control knob is in the ON position. Also, check the time settings on the timer and adjust them if needed. If a '0' is displayed, contact a Gas Safe Registered Engineer (or a Registered Gas Installer in IE).
  • W
    williamschristinaAug 20, 2025
    What to do if there is no hot water with my IDEAL Boiler?
    • P
      Patricia GonzalesAug 20, 2025
      If you are experiencing a lack of hot water with your IDEAL Boiler, make sure the programmer is in the 'ON' position and the cylinder is turned up. Also, check that the mains switch (fused) is turned on and ensure knob (B) is in the correct position. Finally, verify that the room thermostat is turned up and the programmer is in the 'ON' position.
  • K
    kmoonAug 22, 2025
    Why is there no central heating in my IDEAL Boiler?
    • A
      Amanda CastanedaAug 22, 2025
      If your IDEAL Boiler isn't providing central heating, first check the time settings on the programmer and adjust them as needed. If '0' is displayed, it is recommended to contact a Gas Safe Registered Engineer or, in IE, a Registered Gas Installer (RGII).
  • R
    robert37Aug 26, 2025
    How to fix no central heating or hot water in my IDEAL LOGIC 18 Boiler?
    • D
      Dr. Nicholas Thornton DDSAug 26, 2025
      If your IDEAL Boiler isn't providing central heating or hot water, first check that the mains switch (fused spur) is turned on and the mode control knob is in the ON position. Also, verify that the timer settings are correct and adjust them as needed.
  • H
    hwoodardAug 28, 2025
    What should I do if my IDEAL Boiler resets 5 times in 15 minutes?
    • A
      Ashley PorterAug 28, 2025
      If your IDEAL Boiler resets 5 times within 15 minutes, turn the power off and then on again at the fused spur. If the boiler still fails to operate, further assistance is needed.
  • J
    Jean JohnsonAug 30, 2025
    What to do if my IDEAL LOGIC 18 has an ignition lockout?
    • A
      Anthony GreenAug 30, 2025
      If your IDEAL Boiler is experiencing an ignition lockout, first check if other gas appliances in your home are working to ensure there's a gas supply. If other appliances aren't working or you don't have any, check that the gas supply is turned on at the meter and/or the pre-payment meter has credit. If the boiler still fails to operate after these checks, further assistance is needed.
  • J
    Jaclyn BentleySep 2, 2025
    What to do for a Fan Fault on an IDEAL LOGIC 18?
    • E
      Erin HillSep 2, 2025
      If your IDEAL Boiler indicates a Fan Fault, reset the appliance. If the boiler fails to operate, further assistance is needed.
  • B
    Bonnie WhiteSep 5, 2025
    How do I fix a Flow Thermistor issue on my IDEAL LOGIC 18 Boiler?
    • A
      alyssaelliottSep 5, 2025
      If your IDEAL Boiler is showing a Flow Thermistor issue, reset the appliance. If the boiler fails to operate, further assistance is needed.
  • G
    Gary LaneSep 8, 2025
    What to do if my IDEAL LOGIC 18 Boiler shows an Outside Sensor Failure?
    • S
      spriceSep 8, 2025
      If your IDEAL Boiler indicates an Outside Sensor Failure, reset the appliance. If the boiler fails to operate, further assistance is needed.
  • J
    Jeanette AcevedoSep 12, 2025
    How to resolve a False Flame Lockout on an IDEAL Boiler?
    • N
      Natalie LeeSep 12, 2025
      If your IDEAL Boiler experiences a False Flame Lockout, reset the appliance. If the boiler fails to operate, further assistance is needed.

Summary

Introduction

Safety

Current Gas Safety (Installation & Use) Regulations or rules in force

Boiler installation requires a Gas Safe Registered Engineer in accordance with regulations.

Electricity Supply

Minimum Clearances

Bottom clearance

Reduced bottom clearance of 5mm is allowed with an easily removable panel.

To Light the Boiler

RESET PROCEDURE

OPERATION

Control of Water Temperature

Adjusts central heating radiator temperature up to a maximum of 80°C.

Weather Compensation

Controls room temperature automatically based on outside weather conditions.

To Shut Down the Boiler

Set the mode control knob to OFF to shut down the boiler.

To Relight the Boiler

Repeat the procedure detailed in 'To light the boiler'.

Frost Protection

Guidance on protecting the system from frost during cold weather.

Boiler Overheat Protection

Boiler shuts down on overheating; fault code L-1 displayed.

Flame Failure

Occurs during flame failure; fault code L-2 displayed.

BOILER CONTROLS

Condensate Drain

To unblock a frozen condensate pipe

Instructions for defrosting a frozen condensate pipe using warm water.

Escape of Gas

Cleaning

Maintenance

POINTS FOR THE BOILER USER

TROUBLESHOOTING

OPERATION MODES

FAULT CODES

IDEAL LOGIC 18 Specifications

General IconGeneral
CategoryBoiler
Output18 kW
Dimensions (H x W x D)700 x 395 x 278 mm
Boiler TypeCombi
ERP RatingA
CH Output (kW)18 kW
Fuel TypeGas
MountingWall-mounted

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