Name: Ideal Heating LOGIC SYSTEM 2 S18
Brand: Ideal Heating
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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.

INSTALLATION

& SERVICING

October 2022

UIN 228297 A05

LOGIC SYSTEM

S15 S18 S24 S30

Table of Contents5
Section 1 - General6
Introduction8
Operation8
Safe Handling8
Optional Accessories8
Safety8
Safe Handling of Substances9
Location of Boiler9
Air Supply9
Gas Supply9
Water Circulation System10
Boiler Controls10
Electrical Supply10
Condensate Drain10
Boiler Dimensions, Services & Clearances11
System Requirements - Central Heating12
System Balancing13
Water Treatment13
Section 2 - Installation14
Boiler Assembly - Exploded View14
Unpacking15
Wall Mounting Template16
Preparing the Wall16
Fitting the Wall Mounting Plate16
Mounting the Boiler16
Flues and Locations17
Flues and Locations - Continued18
Horizontal Flue Positions19
Vertical Flue Positions19
Flue System Dimensions20
Fitting the Turret20
Cutting the Flue21
Assembling the Vertical Flue22
Condensate Drain23
Condensate Drain - Continued24
Connections & Filling25
Electrical Connections26
Installer Wiring26
Installer Wiring - Cont27
Replacing Pre-Fitted Mains Cable28
External Electrical Controls28
Wiring Diagram29
Commissioning and Testing30
Initial Lighting31
The Display32
General Checks32
General Checks - Water Circulation33
Restart Procedure33
Accessing the Installer Mode34
Handing over34
Section 3 - Servicing35
Servicing Schedule35
Removal / Replacement of Components36
Draining the Boiler36
Boiler Front Panel Removal / Replacement36
Flue Manifold Removal/Replacement37
Burner Removal and Cleaning37
Fan and Venturi Assembly Removal and Cleaning38
Cleaning the Heat Exchanger39
Ignition / Detection Electrode Replacement / Inspection39
Cleaning the Condensate Trap40
Return Thermistor Replacement40
Burner Injector Replacement40
Burner Replacement41
Spark Generator Replacement41
Gas Control Valve Replacement41
Condensate Trap Replacement / Cleaning42
Primary PCB Replacement42
Pressure Gauge Replacement43
PRV Replacement43
Pump Automatic Air Vent Replacement44
Water Pressure Switch Replacement44
Pump Head Replacement45
Flow Thermistor Replacement45
Expansion Vessel Recharging & Replacement46
Heat Engine Replacement47
Section 4 - Fault Finding48
Fault Finding Main Menu48
L 01' - Overheat Lockout49
L 02' - Ignition Lockout49
L 06' - Flame on before Gas Valve on50
F 01' - Low Water Pressure50
F 02 or FN or LN' - Flame Loss50
F 03' - Fan Fault51
F 04 or L 04' - Flow Thermistor Fault51
F 05 or L 05' - Return Thermistor Fault52
F 06' - Outside Sensor Fault52
No CH Operation53
No Display54
No DHW Operation54
Flow/Return Differential Greater than 50°C54
Section 5 - Spare Parts55
Section 6 - Benchmark to Commissioning56

Boiler Type	System
Mounting	Wall-mounted
Output	18 kW
Fuel Type	Natural Gas
ERP Rating	A
Max. Working Pressure	3 bar
Flow Temperature Range	30 - 80°C

Ideal Heating LOGIC SYSTEM 2 S18 Installation & Servicing

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