IDEAL LOGIC+ SYSTEM2 S15 Installation & Servicing
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IDEAL LOGIC+ SYSTEM2 S15 Installation & Servicing

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INSTALLATION
& SERVICING
LOGIC+ SYSTEM
2
S15 S18 S24 S30
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 Heating.
For the very latest copy of literature for specification and maintenance practices visit our website idealheating.com
where you can download the relevant information in PDF format.
July 2022
UIN 228294 A02

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Summary of Contents for IDEAL LOGIC+ SYSTEM2 S15

  • Page 1 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 Heating.
  • Page 2 ERP DATA SYMBOL UNITS 15 kW 18 kW 24 kW 30 kW Condensing Boiler Low Temperature Boiler B1 Boiler Cogeneration Space Heater Equipped with a Supplementary Heater Combination Heater Nominal Heat Output for Space Heating Full Load 15.1 18.1 24.3 30.3 Part Load Auxiliary Electricity Consumption...
  • Page 3 PRODUCT FICHE LOGIC+ SYSTEM S BOILER Ideal Heating ERP DATA SYMBOL UNITS MODEL 15 kW 18 kW 24 kW 30 kW Condensing boiler Seasonal space heating efficiency class Rated heat output Seasonal space heating energy efficiency ƞs Annual energy consumption...
  • Page 4 NOTES FOR THE INSTALLER For any technical queries please ring the Ideal installer helpline : 01482 498663 BOILER RESTART PROCEDURE - Press the RESTART button. The boiler will repeat the ignition sequence if a heat demand is present. DEFINITIONS WARNING: Risk of injury or death...

  • Page 5: Table Of Contents

    CONTENTS Section 1 - General ..................6 Section 3 - Servicing ................. 35 Introduction ................... 8 Servicing Schedule ..............35 Operation ..................8 Removal / Replacement of Components ........36 Safe Handling ................8 Draining the Boiler ..............36 Optional Accessories ..............8 Boiler Front Panel Removal / Replacement ........

  • Page 6: Section 1 - General

    Section 1 - General Table 1 General Data 15 kW 18 kW 24 kW 30 kW Gas Supply 2H-G20-20 mbar Gas Supply Connection 15mm copper compression Injector Size 4.15 4.15 4.15 4.65 Flow Connection Central Heating 22mm copper compression Return Connection Central Heating 22mm copper compression Flue Terminal Diameter...
  • Page 7 Section 1 - General LOGIC+ SYSTEM Natural Gas Only G.C. Applicance No BOILER SIZE (Benchmark No.) 41-796-93 41-796-94 41-796-95 41-796-96 Destination Country: For UK, to comply with Building Regulations Part L1 (Part 6 in Scotland) the boiler should be fitted in accordance with the manufacturer’s instructions.

  • Page 8: Introduction

    Section 1 - General INTRODUCTION SAFE HANDLING The Logic+ System S range of boilers are wall mounted, full This boiler may require 2 or more operatives to move it to its sequence, automatic spark ignition, low water content, fanned installation site, remove it from its packaging base and during flue, high efficiency, condensing, system gas boilers.

  • Page 9: Safe Handling Of Substances

    Do not connect external control devices directly to this appliance unless recommended in this manual or by Ideal Heating in writing. If in doubt, please enquire. Bathroom Installations Unapproved control devices could invalidate the warranty of this [0] Zone 0 appliance and infringe the Gas Safety Regulations.

  • Page 10: Air Supply

    Section 1 - General AIR SUPPLY. 1.10 WATER CIRCULATION SYSTEM It is not necessary to have an air vent in the room or internal IMPORTANT: A minimum length of 1 metre of copper space where the boiler is installed. pipe MUST be fitted to both flow and return connections from the boiler before connection to any plastic piping.

  • Page 11: Boiler Dimensions, Services & Clearances

    Section 1 - General 1.14 BOILER DIMENSIONS, SERVICES & CLEARANCES Refer to Section 2.17 Side and Rear Flue The boiler connections are made on the boiler connection tails. a. Provided that the flue hole is cut accurately, e.g. with a core drill, the flue can be installed from inside the building where The following minimum clearances must be maintained wall thicknesses do not exceed 600 mm.

  • Page 12: System Requirements - Central Heating

    Connect through a non-return valve to the system for system (ft.w.g.) (16.2) (14.7) (10.8) (6.2) Be at least 150 mm below the makeup vessel on the With Ideal System m.w.g. return side of the radiators Filter & Valves (ft.w.g.) 14.1 System prepressurisation.

  • Page 13: System Balancing

    Fernox exchanger. www.fernox.com Tel: +44 (0) 3301 007750 IMPORTANT The application of any other treatment to this product may render the guarantee of Ideal Heating Sentinel Performance Solutions invalid. www.sentinelprotects.com Tel: +44 (0) 1928 704330 Ideal Heating recommend Water Treatment in accordance...

  • Page 14: Section 2 - Installation

    Section 2 - Installation BOILER ASSEMBLY - EXPLODED VIEW CH Return Valve Water Pressure Switch Flue Manifold Top Control Box Front CH Flow Valve Pressure Gauge Clamp Retaining Flue Turret Blank Insert Pump Head Gas Cock Hose Condensate Internal Heat Engine Auto Air Vent Gas Valve Condensate Trap...

  • Page 15: Unpacking

    Section 2 - Installation UNPACKING Unpack and check the contents The boiler is supplied fully assembled in Pack A. A telescopic or non-telescopic flue assembly for rear or side flue outlet in Pack B is suppled as a separate order. Pack A Contents Boiler Hardware Pack Box...

  • Page 16: Wall Mounting Template

    Section 2 - Installation WALL MOUNTING TEMPLATE Extended centre line “A” 1 5 5 (2 0 0 ) IMPORTANT: Ensure the wall where the boiler will be is flat. The wall mounting template is located on the internal protective packaging. The template shows the position Refer to Section of the fixing and rear flue centre holes for a standard installation.

  • Page 17: Flues And Locations

    203130 203131 152258 152259 Raised horizontal flue kit Balcony flue kit Soffit kit Ideal part no. 208177 Ideal part no. 208290 Ideal part no. 211302 Terminal WARNING: MUST be fitted as • It is critical that products of combustion cannot re-enter...

  • Page 18: Flues And Locations - Continued

    Section 2 - Installation FLUES AND LOCATIONS - CONTINUED B = Top Clearance Flue systems that require extension kits must be installed Top Clearance is measure from the top of the turret to the top with a 1.5° decline from the flue terminal back to the boiler. of the hole where the flue terminates.

  • Page 19: Horizontal Flue Positions

    Section 2 - Installation HORIZONTAL FLUE POSITIONS Facing the boundary Opening in adjacent building Boundary a. < 1000 300 c. 600 d. 300 b. Parallel to the boundary At an angle to the boundary All measurements : mm Refer to Table 5 2.10 VERTICAL FLUE POSITIONS Height Difference ‘A’...

  • Page 20: Flue System Dimensions

    Section 2 - Installation 2.11 FLUE SYSTEM DIMENSIONS 2.12 FITTING THE TURRET Flue Design 1. Ensure the condensate trap in filled with water IMPORTANT: 2. Ensure the rubber seal is not damaged and fitted correctly on the appliance manifold. 1. Flue lengths may vary, always measure flue lengths before cutting.

  • Page 21: Cutting The Flue

    Mark Cut Length = “A” + 44 mm from terminal lip A + 44 mm Section 2 - Installation 2.13 CUTTING THE FLUE 10 mm Adjust to Length = “A” + 44 mm from terminal lip CUTTING HORIZONTAL FLUE TERMINAL +14 mm (non-telescopic) +14 mm...

  • Page 22: Assembling The Vertical Flue

    Section 2 - Installation For the full range of A video showing how to correctly SCAN SCAN FLUE AND ACCESSORIES measure and fit a flue can be for Flue Fitting for Flues and found by viewing the QR Code. please visit idealheating.com/ Video’s Accessories Guide flues...

  • Page 23: Condensate Drain

    Section 2 - Installation 2.15 CONDENSATE DRAIN External Drain Connections The use of an externally run condensate drainage pipe should only be considered after exhausting all internal termination options as described previously. An external system must terminate at a suitable foul water discharge point or purpose designed soakaway.

  • Page 24: Condensate Drain - Continued

    Section 2 - Installation 2.16 CONDENSATE DRAIN - CONTINUED Figure 1 - Connection of Condensate Drainage Pipe to Figure 2 - Connection of a Condensate Drainage Pipe Downstream of a Sink, Basin, Bath or Shower Water Trap to Internal Soil & Vent Stack Internal Soil Vent Stack Boiler Boiler...

  • Page 25: Connections & Filling

    Section 2 - Installation 2.17 CONNECTIONS & FILLING PRV DRAIN The PRV connection, located at the bottom left-hand side of the boiler, comprises an open ended grommet. CAUTION: Heating the isolation valves may damage the fibre seals IMPORTANT Remove all boss blanking plugs before connecting the The grommet is designed for 15 mm Ø...

  • Page 26: Installer Wiring

    Section 2 - Installation 2.19 INSTALLER WIRING All of the connections can now be readily accessed, the WARNING: Ensure the supply cord is not damaged plugs can be removed to aid wiring. 5. Connect the switched live to the terminal block as shown. The boiler must be connected to a permanent live power supply.

  • Page 27: Installer Wiring Continued

    Section 2 - Installation 2.20 INSTALLER WIRING - CONTINUED Logic + System S BOILER WITH S PLAN SYSTEM (without outside sensor) S PLAN VALVE S PLAN FUSED VALVE SPUR BOILER SL 1 MAINS IN IN OUT CH ON TIMER HW ON HW OFF 2.21 REPLACING PRE-FITTED MAINS CABLE Strain...

  • Page 28: Wiring Diagram

    Section 2 - Installation 2.23 WIRING DIAGRAM WPS Gnd WPS Signal Installation and Servicing...

  • Page 29: Commissioning And Testing

    Section 2 - Installation 2.24 COMMISSIONING AND TESTING B. Gas Installation A. Electrical Installation WARNING: Electrical safety checks should be WARNING: Open windows, doors and extinguish carried out by a qualified person. flames before starting the next steps. Do not smoke. 1.

  • Page 30: Initial Lighting

    Section 2 - Installation 2.25 INITIAL LIGHTING Legend A. Hot Keys B. Central Heating Temperature Knob On at 60°C Target 60°C C. Boiler Status Display Menu Mode D. Burner On indicator E. Pressure Gauge F. CH Flow Isolating Valve G. Gas Cock H.

  • Page 31: User Interface Commissioning

    When the boiler is powered up for the first time, you will have the options to set the contact details for boiler servicing. Set your contact details for boiler service? (defaults to Ideal Heating contact information otherwise) 2.27 CHANGING BOILER OPERATING MODE The boiler mode is displayed by default, to change the mode, simply press mode and select the desired mode.

  • Page 32: Menu Operation

    Section 2 - Installation 2.28 MENU OPERATION The menu option contains a list of attributes that informs the user about the operating state of the boiler. The user should scroll down the menu and press enter to select the desired option. Menu Service Contact Name Service Phone Number...

  • Page 33: General Checks

    Section 2 - Installation 2.30 GENERAL CHECKS Make the following checks for correct operation in: CENTRAL HEATING (CH) MODE TEMPERATURE TEMPERATURE SETTING SETTING 1. Ensure that the CH external controls are calling for heat and the DHW external controls are not. The display (No Outside Sensor) (With Outside Sensor) should show:-...

  • Page 34: Restart Procedure

    Section 2 - Installation 2.31 RESTART PROCEDURE To restart the boiler, press the Restart button (A). Ignition Lockout 1 Check other gas appliances work. Ignition Lockout 2 Restart boiler. 1 Check other gas appliances work. 2 Restart boiler. 3 If fault persists, contact installer. 3 If fault persists, contact installer.

  • Page 35: Section 3 - Servicing

    Section 3 - Servicing SERVICING SCHEDULE WARNING: Servicing can only be carried out by Gas Safe Registered Engineers Always turn OFF the gas supply at the gas service cock, and switch OFF and disconnect the electricity supply to the appliance before servicing Combustion testing must be carried out by a competent person using a combustion analyser conforming to BS EN 50379-3:2012.

  • Page 36: Removal / Replacement Of Components

    Section 3 - Servicing REMOVAL / REPLACEMENT OF COMPONENTS WARNING: Do not operate the boiler without a front panel fitted Notes. When replacing any component. 1. In order to assist fault finding, the control panel has an 1. Isolate the electricity supply. LCD diagnostic display.

  • Page 37: Boiler Front Panel Removal / Replacement

    Section 3 - Servicing BOILER FRONT PANEL REMOVAL / REPLACEMENT REMOVAL REPLACEMENT 1. Loosen the two screws retaining the front panel. 3. Hook the panel onto the top retaining clips. 2. Pull the two clips down to disengage and pull panel 4.

  • Page 38: Fan And Venturi Assembly Removal And Cleaning

    Section 3 - Servicing FAN AND VENTURI ASSEMBLY REMOVAL AND CLEANING 1. Disconnect the electrical leads from the fan. 9. Inspect fan outlet sealing gasket and replace if necessary. 2. Remove the clip from the gas control valve outlet and 10.

  • Page 39: Burner Removal And Cleaning

    Section 3 - Servicing BURNER REMOVAL AND CLEANING SCAN for video Refer to Section 4. Pull the burner out from the left hand 1. Remove the 2 burner front fixing screws and the side of the boiler once it is in the vertical 2 rear extended nuts.

  • Page 40: Ignition / Detection Electrode Replacement / Inspection

    Section 3 - Servicing IGNITION / DETECTION ELECTRODE REPLACEMENT / INSPECTION Refer to Section Ignition /Detection Electrode 1. Remove the fan. Refer to Section 2. Remove the flue manifold. 3. Remove the burner. Refer to Section 4. When servicing the boiler inspect the condition of the electrode and check the dimensions shown.

  • Page 41: Burner Injector Replacement

    Section 3 - Servicing 3.12 BURNER REPLACEMENT 3.11 BURNER INJECTOR REPLACEMENT SCAN Refer to Section Refer to Section 3.2 & 3.7 for video 3.13 RETURN THERMISTOR REPLACEMENT Refer to Section 1. Isolate and drain down the boiler. 2. Remove the clip from the pump housing and remove the thermistor.

  • Page 42: Spark Generator Replacement

    Section 3 - Servicing 3.14 SPARK GENERATOR REPLACEMENT Refer to Section 1. Disconnect the leads from the spark generator. 4. Fit the new spark generator and reassemble, ensuring that the the earth lead is replaced. 2. Gently push up the generator to release the bottom clip from the gas valve mounting bracket.

  • Page 43: Pressure Gauge Replacement

    Section 3 - Servicing 3.17 PRESSURE GAUGE REPLACEMENT 4. Releasing the two retaining clips on the pressure gauge Refer to Section ease the pressure gauge through the front of the control panel. 1. Drain the boiler. 5. Fit the new pressure gauge from the front of the lower Refer to Section control panel ensuring correct orientation.

  • Page 44: Primary Pcb Replacement

    Section 3 - Servicing 3.19 PRIMARY PCB REPLACEMENT Program this model? WARNING: It is critical that the correct boiler size System UK and fuel type is entered in to the boiler. 15kW Natural Gas CAUTION: Fit the earth strap provided with the PCB Back to your wrist and secure to a suitable earth on the boiler chassis.

  • Page 45: Pump Automatic Air Vent Replacement

    Section 3 - Servicing 3.20 PUMP AUTOMATIC AIR VENT REPLACEMENT 5. Reassemble. Ensure the air vent head ‘o’ ring seal is Refer to Section fitted. 6. Ensure the air vent cap is loose. 1. Drain the boiler. 7. Refill the boiler. Check for leaks around the new air vent Refer to Section joint.

  • Page 46: Water Pressure Switch Replacement

    Section 3 - Servicing 3.22 CH WATER PRESSURE SWITCH REPLACEMENT Refer to Section 1. Drain the boiler. Refer to Section 2. Pull off the two electrical connections. 3. Using a suitable tool, pull out the metal retaining clip. 4. Carefully withdraw the pressure switch. 5.

  • Page 47: Expansion Vessel Recharging & Replacement

    Section 3 - Servicing 3.24 EXPANSION VESSEL RECHARGING & REPLACEMENT Refer to Section RECHARGING 1. Remove the charge point cover. 2. Recharge the tank pressure to 0.75 bar. 3. Reassemble. 4. Check that the boiler operates. REPLACEMENT 5. Drain the boiler CH circuit. Refer to Section 6.

  • Page 48: Heat Engine Replacement

    Section 3 - Servicing 3.25 HEAT ENGINE REPLACEMENT 18. Ensure the trap is filled with water. Refer to Section Refer to Section 3.16 CAUTION: Protect the gas and electrical controls with 19. Refill the boiler and check for leaks. a waterproof sheet. Refer to Section 2.15 Refer to Section...

  • Page 49: Section 4 - Fault Finding

    More detailed fault checks and actions are described in the following pages. Menu Fault Help Change Service Time [Ideal] Technical Help Line: Fault History [01482 498663] Fault Help Vent System...

  • Page 50: Ignition Lockout

    Section 4 - Fault Finding IGNITION LOCKOUT If the boiler is restarted does the Is the Gas Pressure available at Check gas supply and boiler ignite for a short time and the Boiler Inlet (>18 mbar)? rectify fault then extinguish? Check wiring connection Is approx 24V DC supply available from gas valve to...

  • Page 51: Flame Loss

    Section 4 - Fault Finding FLAME LOSS Does the boiler ignite for a short Is the Gas Pressure available at Check gas supply and time and then extinguish? the Boiler Inlet (>18 mbar)? rectify fault Check wiring from Is 24V DC supply available at the Check the electrode and associated gas valve to PCB for Gas Valve while the flame is on?

  • Page 52: Flow Thermistor Fault

    Section 4 - Fault Finding FLOW THERMISTOR FAULT Securely connect the wiring to the Flow Is the wiring securely connected to the Flow Thermistor Thermistor Located in the Flow Pipe lower LHS of Boiler Disconnect the wiring from the Flow Thermistor Check the resistance using a suitable multimeter connected Fit a new Thermistor across the Thermistor’s terminal pins.

  • Page 53: Outside Sensor Fault

    Section 4 - Fault Finding 4.10 OUTSIDE SENSOR FAULT Securely connect the wiring at both the Is the wiring securely connected at both the boiler and boiler and Outside Sensor Outside Sensor? Disconnect the wires to the outside sensor. Check the resistance using a suitable multimeter connected across the Outside Sensor’s terminal pins.

  • Page 54: No Dhw Operation

    Section 4 - Fault Finding 4.12 NO DHW OPERATION Adjust cylinder stat Is the Cylinder Stat calling for heat? Switch timer on Is DHW timer on? Press mode button until OFF is not shown under the Is OFF shown under Tap symbol? Tap symbol Is there 230V at SL2 IN Check system controls and wiring...

  • Page 55: Section 5 - Spare Parts

    Comprehensive spares parts information and details of approved Ideal Parts Distributors are available on idealparts.com Our Parts team are also available to help with your Ideal Spare Parts enquiries on 01482 498665. When calling, and to ensure we can provide you with the most accurate parts information, please ensure you have the following to hand;...

  • Page 56: Section 6 - Benchmark & Commissioning

    Section 6 - Benchmark & Commissioning Installation and Servicing...
  • Page 57 Section 6 - Benchmark to Commissioning Benchmark Commissioning & Warranty Validation Service Record 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 warranty the boiler needs to be registered with the manufacturer within one month of the installation.
  • Page 58 Section 6 - Benchmark to Commissioning GAS BOILER SYSTEM COMMISSIONING CHECKLIST & WARRANTY VALIDATION RECORD Address: Boiler make and model: Boiler serial number: Commissioned by (PRINT NAME): Gas Safe registration number: Company name: Telephone number: Company email: Company address: Commissioning date: Heating and hot water system complies with the appropriate Building Regulations? Optional: Building Regulations Notification Number (if applicable): Time, temperature control and boiler interlock provided for central heating and hot water...
  • Page 59 Section 6 - Benchmark to Commissioning SERVICE & INTERIM BOILER WORK RECORD It is recommended that your boiler and heating system are regularly serviced and maintained, in line with manufacturers’ instructions, and that the appropriate service / interim work record is completed. Service provider When completing a service record (as below), please ensure you have carried out the service as described in the manufacturers’...
  • Page 60 Section 6 - Benchmark to Commissioning FLOWCHART FOR CO LEVEL AND COMBUSTION RATIO CHECK ON COMMISSIONING A CONDENSING BOILER Important Preliminary Information on Checks The air gas ratio valve is factory-set and must not be adjusted DURING COMMISSIONING. If the boiler requires conversion to operate with a different gas family (e.g. conversion from natural gas to LPG) separate guidance is provided with the conversion kit supplied and this must be followed.
  • Page 61 With boiler still set at maximum gas rate, insert analyser than or equal to 0.2%? probe into flue gas sampling point. Allow readings to stabilise before recording. Turn off appliance and call Ideal Technical Helpline for advice. CO level less The appliance must not be commissioned until problems are than 350ppm AND CO/CO2 identified and resolved.
  • Page 62 At Ideal Heating we take our environmental impact seriously, therefore when installing any Ideal Heating product please make sure to dispose of any previous appliance in an environmentally conscious manner. Households can contact their local authority to find out how.
  • Page 63 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 Heating.
  • Page 64 Benchmark Commissioning Checklist. You can check your installer by calling Gas Safe Register direct on 0800 4085500. Ideal Heating is a member of the Benchmark scheme and fully supports the aims of the programme. Benchmark has been introduced to improve the standards of installation and commissioning of central heating systems in the UK and to encourage the regular servicing of all central heating systems to ensure safety and efficiency.
  • Page 65 INTRODUCTION BOILER OPERATION The Logic + System is a system boiler, featuring full sequence automatic spark ignition and fan assisted combustion. It is designed to provide central heating and hot water when a separate hot water cylinder is installed. On at 60°C Due to the high efficiency of the boiler, condensate is produced Target 60°C Menu...
  • Page 66 WEATHER COMPENSATION OPERATION MODES When the Weather Compensation option is fitted to the system Winter Conditions - (Central Heating and Domestic Hot then the central heating temperature knob (B) becomes Water required) a method of controlling room temperature. Turn the knob If a Boiler symbol is shown on the display then press Mode clockwise to increase room temperature and anti-clockwise until either Ready or On is shown under the Boiler symbol.
  • Page 67 FOR ANY QUERIES PLEASE RING THE IDEAL CONSUMER HELPLINE : 01482 498660 BOILER RESTART PROCEDURE - To restart boiler press the restart button...
  • Page 68 Does the boiler operate and See boiler “Display Functions” provide central heating? If fault persists contact Ideal section Customer Service Helpline if your appliance is under warranty or a Check the time settings on the...
  • Page 69 DISPLAY FUNCTIONS - NORMAL OPERATION MODE NORMAL OPERATION SCREENS WITHOUT OUTSIDE SENSOR WITH OUTSIDE SENSOR How to adjust Boiler Temperatures Off Mode Winter Mode, DHW Demand Off Mode On at 60°C Ready To Switch On Radiator Target 60°C To Switch On Target 60°C Room Thermostat or Press Mode Button &...
  • Page 70 DISPLAY FUNCTIONS - FAULT MESSAGES Overheat Lockout Outside Sensor Fault Room Thermostat Fault Gas Valve Fault 1 With boiler off & system cold, fill system to 1.0 bar. Contact Installer Contact electricity provider 2 Bleed radiators, refill system to 1.0 bar. Check room thermostat batteries 3 Check radiator valves &...
  • Page 71 Notes Installation and Servicing...
  • Page 72 At Ideal Heating we take our environmental impact seriously, therefore when installing any Ideal Heating product please make sure to dispose of any previous appliance in an environmentally conscious manner. Households can contact their local authority to find out how.

This manual is also suitable for:

Logic+ system2 s18Logic+ system2 s24Logic+ system2 s30

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