Ideal Heating LOGIC SYSTEM 2 S15 User guide

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 SYSTEM2
S15 S18 S24 S30

2
Installation and Servicing
ERP DATA
The code of practice for the installation,
commissioning & servicing of central
heating systems
WEEE DIRECTIVE 2012/19/EU
Waste Electrical and Electronic Equipment Directive
• At the end of the product life, dispose of the
packaging
and product in a corresponding recycle centre.
• Do not dispose of the unit with the usual domestic refuse.
• Do not burn the product.
• Remove the batteries.
• Dispose of the batteries according to the local statutory
requirements and not with the usual domestic refuse.
SYMBOL UNITS 15 kW 18 kW 24 kW 30 kW
Condensing Boiler n/a n/a yes yes yes yes
Low Temperature Boiler n/a n/a no no no no
B1 Boiler n/a n/a no no no no
Cogeneration Space Heater n/a n/a no no no no
Equipped with a Supplementary Heater n/a n/a no no no no
Combination Heater n/a n/a no no no no
Nominal Heat Output for Space Heating
Full Load P4 kW 15.1 18.1 24.3 30.3
Part Load P1 kW 4.9 5.9 8.0 9.9
Auxiliary Electricity Consumption
Full Load elmax kW 0.022 0.025 0.046 0.050
Part Load elmin kW 0.011 0.003 0.013 0.012
Standby PSB kW 0.003 0.002 0.002 0.002
Seasonal Space Heating Energy E󰀩ciency
Full Load ƞ4 % 90.0 90.0 90.0 89.6
Part Load ƞ1 % 97.8 98.5 98.6 98.2
Standby Loss Pstby kW 0.05 0.05 0.05 0.05
Ignition Pign kW 0 0 0 0
Emissions NOx (Gross) NOx, pond Hs mg/kWh 21 24 28 26
Annual Energy Consumption QHE GJ 47 56 75 93
Sound Power Level, Indoors LWA dB 42 44 50 50

3Installation and Servicing
LOGIC SYSTEM2S BOILER
Ideal Heating ERP DATA
SYMBOL UNITS MODEL
15 kW 18 kW 24 kW 30 kW
Condensing boiler Yes
Seasonal Space heating e󰀩ciency class A
Rated heat output kW 15 18 24 30
Seasonal space heating energy e󰀩ciency ƞS% 93* 93* 94* 93*
Annual energy consumption QHE GJ 47 56 75 93
Sound power level, indoors LWA dB 42 44 50 50
Seasonal Space Heating Energy E󰀩ciency of the Boiler *%
Temperature control (from che of temperature control) %
Class I Class II Class III Class IV Class V Class VI Class VII Class VIII
1% 2% 1.5% 2% 3% 4% 3.5% 5%
PRODUCT FICHE
 
The energy e󰀩ciency of the package of products provided for in this document may not correspond to its actual energy e󰀩ciency once
installed in a building, as the e󰀩ciency is inuenced by further factors such as heat loss in the products in relation to the building size and its
characteristics
Collector Size
(in m2)Tank Volume (in m3)Collector E󰀩ciency
(in %)
Tank rating
A* = 0.95
A = 0.91
B = 0.86
C = 0.83
D-G = 0.81
Solar Contribution (from che of solar device)
Seasonal Space Heating Energy E󰀩ciency of Package TOTAL: A+B+C=
Seasonal Space Heating Energy E󰀩ciency Class of Package
= (‘III ’x + ‘IV ’ x ) x 0.9 x ( / 100 x ) = %
%
GG F E D C B A A+ A++ A+++
< 30% ≥ 30% ≥ 34% ≥ 36% ≥ 75% ≥ 82% ≥ 90% ≥ 98% ≥ 125% ≥ 150%
A
B
C
94%

4
Installation and Servicing
Ideal Heating reserve the right to vary specication without notice
DEFINITIONS
IMPORTANT: Important information
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.
NOTES FOR THE INSTALLER
WARNING: Risk of injury or death
CAUTION: Risk of damage to objects
Table of Acronyms
CH - Central Heating
DHW - Domestic Hot Water
TRV - Thermostatic Radiator Valve
PRV - Pressure Relief Valve
IE - Ireland
ETCI - Electro-Technical Council of Ireland
BS - British Standard
WRAS - Water Regulations Advisory Scheme
SAP - Standard Assessment Procedure
IEE - Institution of Electrical Engineers
UKCA - UK Conformity Assessed
RHS - Right Hand Side
LHS - Left Hand Side
PCB - Printed Circuit Board

5Installation and Servicing
Section 1 - General.....................................................................................6
1.1 Introduction...................................................................................8
1.2 Operation......................................................................................8
1.3 Safe Handling...............................................................................8
1.4 OptionalAccessories.................................................................... 8
1.5 Safety............................................................................................8
1.6 Safe Handling of Substances.......................................................9
1.7 Location of Boiler ......................................................................... 9
1.8 Air Supply......................................................................................9
1.9 Gas Supply...................................................................................9
1.10 Water Circulation System........................................................... 10
1.11 Boiler Controls............................................................................10
1.12 Electrical Supply.........................................................................10
1.13 Condensate Drain....................................................................... 10
1.14 Boiler Dimensions, Services & Clearances.................................11
1.15 System Requirements - Central Heating....................................12
1.16 System Balancing.......................................................................13
1.17 Water Treatment......................................................................... 13
Section 2 - Installation..............................................................................14
2.1 BoilerAssembly - Exploded View............................................... 14
2.2 Unpacking................................................................................... 15
2.3 Wall Mounting Template..............................................................16
2.4 Preparing the Wall...................................................................... 16
2.5 Fitting the Wall Mounting Plate................................................... 16
2.6 Mounting the Boiler..................................................................... 16
2.7 Flues and Locations.................................................................... 17
2.8 Flues and Locations - Continued................................................18
2.9 Horizontal Flue Positions ........................................................... 19
2.10 Vertical Flue Positions ...............................................................19
2.11 Flue System Dimensions ........................................................... 20
2.12 Fitting the Turret..........................................................................20
2.13 Cutting the Flue..........................................................................21
2.14 Assembling the Vertical Flue...................................................... 22
2.15 Condensate Drain....................................................................... 23
2.16 Condensate Drain - Continued...................................................24
2.17 Connections & Filling..................................................................25
2.18 Electrical connections.................................................................26
2.19 Installer Wiring............................................................................26
2.20 InstalLer Wiring - Cont................................................................27
2.21 Replacing Pre-Fitted Mains Cable..............................................28
2.22 External Electrical Controls.........................................................28
2.23 Wiring Diagram...........................................................................29
2.24 Commissioning and Testing........................................................30
2.25 Initial Lighting.............................................................................. 31
2.26 The Display................................................................................. 32
2.27 General Checks..........................................................................32
2.28 General Checks - Water Circulation.......................................... 33
2.29 Restart Procedure.......................................................................33
2.30 Accessing the Installer Mode...................................................... 34
2.31 Handing Over.............................................................................. 34
Section 3 - Servicing.................................................................................35
3.1 Servicing Schedule.....................................................................35
3.2 Removal / Replacement of Components....................................36
3.3 Draining the Boiler......................................................................36
3.4 Boiler Front Panel Removal / Replacement................................ 36
3.5 Flue Manifold Removal/Replacement......................................... 37
3.6 Burner Removal and Cleaning....................................................37
3.7 Fan and VenturiAssembly Removal and Cleaning..................... 38
3.8 Cleaning the Heat Exchanger..................................................... 39
3.9 Ignition / Detection Electrode Replacement / Inspection............39
3.10 Cleaning the Condensate Trap................................................... 40
3.11 Return Thermistor Replacement................................................ 40
3.12 Burner Injector Replacement......................................................40
3.13 Burner Replacement................................................................... 41
3.14 Spark Generator Replacement...................................................41
3.15 Gas Control Valve Replacement.................................................41
3.17 Condensate Trap Replacement / Cleaning................................. 42
3.16 Primary PCB Replacement......................................................... 42
3.18 Pressure Gauge Replacement................................................... 43
3.19 PRV Replacement......................................................................43
3.20 PumpAutomaticAir Vent Replacement...................................... 44
3.21 CH Water Pressure Switch Replacement................................... 44
3.22 Pump Head Replacement...........................................................45
3.23 Flow Thermistor Replacement....................................................45
3.24 Expansion Vessel Recharging & Replacement.......................... 46
3.25 Heat Engine Replacement.......................................................... 47
Section 4 - Fault Finding...........................................................................48
4.1 Fault Finding Main Menu............................................................48
4.2 ‘L01’ - Overheat Lockout............................................................ 49
4.3 ‘L02’ - Ignition Lockout...............................................................49
4.4 ‘L06’ - Flame On Before Gas Valve On...................................... 50
4.5 ‘F 01’- Low Water Pressure....................................................... 50
4.6 ‘F 02 or FN or LN’- Flame Loss.................................................. 50
4.7 ‘F 03’- Fan Fault......................................................................... 51
4.8 F 04 or L04’ - Flow Thermistor Fault .........................................51
4.9 ‘F 05 or L05’ - Return Thermistor Fault .....................................52
4.10 ‘F 06’- Outside Sensor Fault......................................................52
4.11 No CH Operation........................................................................53
4.12 No Display..................................................................................54
4.13 No DHW Operation..................................................................... 54
4.14 Flow/Return Differential Greater than 50°C................................ 54
Section 5 - Spare Parts............................................................................ 55
Section 6 - Benchmark to Commissioning...........................................56-64
CONTENTS

6
Installation and Servicing
Section 1 - General
Table 2 Performance Data - Central Heating
Gas consumption is calculated using a caloric value of 38.7 MJ/
m3(1038 Btu/ft3) gross or 34.9 MJ/m3 (935 Btu/ft3) nett
To obtain the gas consumption at a di󰀨erent caloric value:
a. For l/s - divide the gross heat input (kW) by the gross C.V. of the
gas (MJ/m3)
b. For Btu/h - multiply the gross heat input (kW) by 26.8
c. For ft3/h - divide the gross heat input (Btu/h) by the gross C.V. of
the gas (Btu/ft3)
d. For m3/h - multiply l/s by 3.6
C13 C33 C53 = A room sealed appliance designed for connection via
ducts to a horizontal or vertical terminal, which admits
fresh air to the burner and discharges the products of
combustion to the outside through orices which, in
this case, are concentric. The fan is up stream of the
combustion chamber.
I2H = An appliance designed for use on 2nd family gas,
Group H only.
* The value is used in the UK Government’s Standard Assessment Procedure (SAP) for energy rating of dwellings. The test data from
which it has been calculated have been certied by a notied body.
15 kW 18 kW 24 kW 30 kW
Gas Supply 2H - G20 - 20 mbar
Gas Supply Connection 15 mm copper compression
Injector Size mm 4.15 4.15 4.15 4.65
Flow Connection Central Heating 22 mm copper compression
Return Connection Central Heating 22 mm copper compression
Flue Terminal Diameter mm 100
Average Flue Temp-Mass Flow Rate 56ºC - 6g/s 58ºC - 8g/s 63ºC - 10g/s 69ºC - 13g/s
CO2Content (± 0.7) Max. CH 9.5% 9.3% 9.2% 9.6%
Min. CH 8.9% 8.3% 8.5% 8.7%
Maximum Working Pressure (Sealed Systems) bar (psi) 2.5(36.3)
Electrical Supply 230 V ~ 50Hz
Power Consumption W 72 75 96 100
Fuse Rating External: 3A Internal : T4 A HRC L250 V
Water Content Central Heating litre (gal) 1.2(0.26)
Packaged Weight kg 31.3
Lift Weight kg 27.3
Boiler Casing Size Height mm 700
Width mm 395
Depth mm 278
Boiler Input: 15 kW 18 kW 24 kW 30 kW
Min Max Min Max Min Max Min Max
Boiler ‘Q’ Net CV kW 4.9 15.1 4.9 18.1 4.9 24.3 6.1 30.4
Gross CV kW 5.4 16.6 5.4 20.1 5.4 27.0 6.7 33.7
Gas Consumption m3/h 0.500 1.537 0.500 1.872 0.500 2.512 0.623 3.136
Boiler Output :
Non Condensing
70ºC Mean Water Temp. kW 4.8 15.0 4.8 18.0 4.8 24.2 6.1 30.3
Condensing
40ºC Mean Water Temp. kW 5.1 15.9 5.1 19.1 5.1 25.6 6.4 31.0
Seasonal E󰀩ciency* SEDBUK 2005 91.2% 91.1% 91.2% 91.1%
Seasonal E󰀩ciency* SEDBUK 2009/2012 89.4% 89.7% 89.7% 89.6%
NOx Classication Class 6
Table 1 General Data

7Installation and Servicing
Section 1 - General
Boiler Page
Make and model.........................................................7
Appliance serial no. on data badge ..........Front Cover
SEDBUK No. %..........................................................6
Controls
Time and temperature control to heating .................27
Time and temperature control to hot water .............27
Heating zone valves................................................n/a
TRV’s........................................................................10
Auto bypass .............................................................10
Boiler interlock..........................................................10
For all boilers
Flushing to BS.7593.................................................13
Inhibitor ....................................................................13
Central heating mode
Heat input...................................................to be calculated
For assistance call Technical Helpline
01482 498663
Page
Burner operating pressure ......................................n/a
Central heating ow temp. ...........measure and record
Central heating return temp. ........measure and record
For combination boilers only
Scale reducer...........................................................15
Hot water mode
Heat input............................................to be calculated
Max. operating burner pressure..............................n/a
Max. operating water pressure........ measure & record
Cold water inlet temp ...................... measure & record
Hot water outlet temp...................... measure & record
Water ow rate at max. setting........ measure & record
For condensing boilers only
Condensate drain................................................23-24
For all boilers: Complete, sign & hand over to customer
For UK, to comply with Building Regulations Part L1 (Part 6 in Scotland) the boiler should be tted in accordance with the
manufacturer’s instructions. Self-certication that the boiler has been installed to comply with Building Regulations can be
demonstrated by completing and signing the Benchmark Commissioning Checklist.
Before installing this boiler, read the Code of Practice sheet at the rear of this book.
BENCHMARK COMMISSIONING CHECKLIST DETAILS
NOTE TO THE INSTALLER: COMPLETE THE BENCHMARK
COMMISSIONING CHECKLISTAND LEAVE THESE
INSTRUCTIONS WITHAPPLIANCE
Natural Gas Only
Destination Country: GB
LOGIC SYSTEM2 S
BOILER SIZE
kW G.C. Applicance No (Benchmark No.)
15 41-796-85
18 41-796-86
24 41-796-87
30 41-796-88

8
Installation and Servicing
Section 1 - General
1.1 INTRODUCTION
The Logic System2range of boilers are wall mounted,
condensing, system gas boilers.
Features:
• High e󰀩ciency
• Full sequence
• Automatic spark ignition
• Low water content
• Fanned ue
The boiler is supplied fully assembled with circulating pump,
pressure gauge, PRV and CH expansion vessel.
A variable temperature control is tted on the user control.
The boiler includes as standard:
- Boiler frost protection
- Daily pump exercise.
Note. The appliance must be wired with a permanent live
supply, or the boiler frost protection will not operate. The boiler
warranty will be invalid if this requirement is not complied with.
The boiler casing is of white painted mild steel with a white
polymer front panel.
The boiler temperature control is visibly located in the control
panel on the front of the boiler.
The heat exchanger is manufactured from cast aluminium.
The boiler is suitable for connection to fully pumped, sealed
heating systems ONLY. Adequate arrangements for completely
draining the system by provision of drain cocks MUST be
provided in the installation pipework.
Pipework from the boiler is routed downwards.
A PRV grommet is tted to the boiler which requires the correct
tting and securing of a clip (supplied) to ensure safe discharge
of the PRV should this occur.
Data Plate
The boiler model and serial number can be located on the
bottom of the boiler casing, shown in Section 1.16 - Water &
Gas Connection Diagram.
1.2 OPERATION
When there is a demand for CH, the heating system is supplied
at the selected temperature of between 30oC and 80oC.
The boiler features a comprehensive diagnostic system which
gives detailed information on the boiler status when operating,
and performance of key components to aid commissioning and
fault nding.
1.3 SAFE HANDLING
This boiler may require 2 or more operatives to move it to its
installation site, remove it from its packaging base and during
movement into its installation location. Manoeuvring the boiler
may include the use of a sack truck and involve lifting, pushing
and pulling.
Caution should be exercised during these operations.
Operatives should be knowledgeable in handling techniques
when performing these tasks and the following precautions
should be considered:
• Grip the boiler at the base.
• Be physically capable.
• 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.
1.4 OPTIONALACCESSORIES
Please visit idealheating.com to access the
optional accessories for this boiler.
1.5 SAFETY
Current Gas Safety (installation and use) regulations or
rules in force:
The appliance is suitable only for installation in GB and should
be installed in accordance with the rules in force.
In GB, the installation must be carried out by a Gas Safe
Registered Engineer. It must be carried out in accordance
with the relevant requirements of the:
• Gas Safety (Installation and Use) Regulations
• Appropriate Building Regulations, either The Building
Regulations, The Building Regulations (Scotland), Building
Regulations (Northern Ireland).
• Water Fittings Regulations or Water byelaws in Scotland.
• Current I.E.E. Wiring Regulations.
Where no specic instructions are given, reference should be
made to the relevant British Standard Code of Practice.
The Boiler has been tested and certied to;
BSEN 15502-1, BSEN 15502-2, BSEN 15502-2-1,
BSEN 60335-1, BSEN 60335-2-102, BSEN 55014-1 and
BSEN 55014-2 for use with Natural Gas & Propane.
Detailed recommendations are contained in the following
British Standard Codes of Practice:
BS5440:1 Flues (for gas appliances of rated input not
exceeding 70 kW).
BS5440:2 Ventilation (for gas appliances of rated input
not exceeding 70 kW).
BSEN. 12828 Heating Systems in buildings: Design for
water based heating systems.
BSEN 12831 Heating Systems in buildings: Method for
calculation of the design heat load.
BSEN 14336 Heating Systems in buildings: Installation
and commissioning of water based heating
systems.
BS5546 Installation of gas hot water supplies for
domestic purposes (2nd Family Gases)
SCAN
for link

9Installation and Servicing
Section 1 - General
BS6798 Installation of gas red hot water boilers of
rated input not exceeding 70 kW.
BS6891 Installation and maintenance of low pressure
gas installation pipework.
BS 7593:2019 Code of practice for the preparation,
commissioning and maintenance of domestic
central heating and cooling water systems.
Health & Safety Document No. 635.
The Electricity at Work Regulations, 1989.
The manufacturer’s notes must NOT be taken, in any way, as
overriding statutory obligations.
IMPORTANT: This appliance is UKCA/CE certicated for
safety and performance. 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.
Unapproved control devices could invalidate the warranty of this
appliance and infringe the Gas Safety Regulations.
1.6 SAFE HANDLING OF SUBSTANCES
No asbestos, mercury or CFCs are included in any part of the
boiler or its manufacture.
1.7 LOCATION OF BOILER
The boiler must be installed on a at and vertical internal wall,
capable of adequately supporting the weight of the boiler and
any ancillary equipment.
The boiler may be tted on a combustible wall and insulation
between the wall and the boiler is not necessary, unless
required by the local authority.
WARNING: Rear access to the boiler is not permitted.
CAUTION: Do not t the boiler outside.
Timber Framed Buildings
Boilers installed in a timber-framed building must comply with
IGE/UP7 +A 2008.
Bathroom Installations
You may install the boiler in any internal space. The installation
must comply with the current IEE (BS 7671) Wiring Regulations
and the electrical regulations applicable in Scotland.
If the appliance is to be installed in a room containing a bath or
shower then, the appliance must be installed beyond Zone 2,
as detailed in BS7671.
Bathroom Installations
[0] Zone 0
[1] Zone 1
[2] Zone 2
[2*] Without the end wall, zone 2 must extend 600 mm from the bath
[A] 600 mm radius from the bath or shower
Compartment Installations
A boiler installed in a compartment does not require
ventilation. However, A boiler installed in a compartment must
provide adequate clearances for servicing. The compartment
should also be tted with a suitable label in accordance with
current standards.
Refer to Section
1.15
1.8 AIR SUPPLY.
It is not necessary to have an air vent in the room or internal
space where the boiler is installed.
1.9 GAS SUPPLY
Consult the local gas supplier to establish an adequate supply
of gas. Do not use existing service pipes without consulting
the local gas supplier.
The gas supply must be governed with a meter.
A gas meter can only be connected by the local gas supplier
or a Gas Safe Registered Engineer.
An existing meter should be checked, preferably by the gas
supplier, to ensure that the meter is adequate to deal with the
required gas supply rate.
It is the responsibility of the Gas Installer to size the gas
installation pipework in accordance with BS6891.
0010017086-002
2
12
12
2
1
600 mm
600 mm
600 mm
2250 mm
2250 mm
2*
A
A
A
600
m
m
CAUTION: This appliance is IP20 rated, do not clean
with jets of water.

10
Installation and Servicing
Section 1 - General
1.11 BOILER CONTROLS
Install CH controls to ensure that the boiler has no demand
when there is no requirement from the system.
Heating systems with TRVs in individual rooms must include a
thermostat to control the temperature in rooms without TRVs.
At least 10% of the minimum boiler heat output should be
achieved using a room thermostat. A bypass circuit with an
automatic bypass valve must be tted to systems with TRVs
or two-port valves on all the radiators to ensure water ow.
1.12 ELECTRICALSUPPLY
Wiring external to the appliance MUST be in accordance with
the current I.E.E. (BS7671) Wiring Regulations and any local
regulations which apply.
The mains supply to the boiler and system wiring centre
shall be through one common fused double pole isolator and
for new heating systems, and where practical replacement
installations, the isolator shall be situated adjacent to the
appliance.
1.13 CONDENSATE DRAIN
The condensate drain provided must be connected to the
drainage point on site. All condensate drainage pipework and
ttings must be made of plastic.
IMPORTANT: The condensate drain pipework should
be installed in accordance with BS6798.
The drain outlet on the boiler is sized for standard 21.5 mm
overow pipe. It is a universal tting to allow use of di󰀨erent
brands of pipework.
Refer to Section
2.15
Whilst the principle of the 1:1 gas valve ensures the Logic
range is able to deliver it is full output at inlet pressures as low
as 14 mb, other gas appliances in the property may not be as
tolerant. When operating pressures are found to be below the
minimum meter outlet of 19 mb these should be checked to
ensure this is adequate for correct and safe operation.
Allowing for the acceptable pressure loss of 1mb across the
installation pipework, it can be assumed that a minimum
permitted operating pressure of 18mb will be delivered to the
inlet of the appliance.
(Reference BS6400-1 Clause 6.2 Pressure Absorption).
The external gas cock could further reduce the operating
pressure when measured at its test point. The pressure drop
is relative to the heat input to the boiler (kW), refer to graph on
P10.
IMPORTANT: Ensure all gas valve connections are
gas tight with a gas soundness check up to the gas control
valve.
Installation pipes must be tted in accordance with BS6891.
The complete installation MUST be tested for gas tightness
and purged as described, for the majority of installations the
appropriate standard is IGEM/UP/1B [23], but alternatively
IGEM/UP/1 [21] or IGEM/UP/1A [22], as appropriate, can be
utilized.
Gas Cock Pressure Drop
Heat Input to Boiler (kW)
Pressure Drop (mbar)
0 5 10 15 20 25 30 35 40
1.4
1.2
1
0.8
0.6
0.4
0.2
0
1.10 WATER CIRCULATION SYSTEM
IMPORTANT: A minimum length of 1 metre of copper
pipe MUST be tted to both ow and return connections from
the boiler before connection to any plastic piping.
The central heating system should be in accordance with
BS6798 and, in addition, for smallbore and microbore
systems, BS EN 12828:2012+A1:2014..
Water treatment is covered later in these instructions.
Refer to Section
1.17
WARNING: This appliance must be earthed

11Installation and Servicing
Section 1 - General
1.14 BOILER DIMENSIONS, SERVICES & CLEARANCES
The boiler connections are made on the boiler connection tails.
The following minimum clearances must be maintained for
operation and servicing.
Additional space will be required for installation, depending
upon site conditions.
Side and Rear Flue
a. Provided that the ue hole is cut accurately, e.g. with a core
drill, the ue can be installed from inside the building where
wall thicknesses do not exceed 600mm.
Front Clearance
The minimum front clearance when built in to a cupboard is
5mm from the cupboard door but 450mm overall clearance
is still required, with the cupboard door open, to allow for
servicing.
* Bottom Clearance
Bottom clearance after installation can be reduced to
15mm.
This must be obtained with an easily removable panel to
provide the 100mm clearance required for servicing.
395
Refer to Section
2.17
278
700
100*
Flue
terminal
2.52.5 from case
Underside View - Dimension to Wall
Water and Gas Connections
CH
Flow Gas CH Return CH Circuit Drain
Data
Plate
CH
Flow
PRV
Grommet
CH
Return
Gas
Inlet
Cond.
Drain Cond.
Drain
98
200
152
PRV Grommet
Refer to Section
2.17
IMPORTANT: Please ensure there is su󰀩cient
clearance either side and below the boiler, particularly from
door hinges and the base of a cupboard.
CH Circuit
Drain
48
Measurements in mm
PRV
Grommet

12
Installation and Servicing
Section 1 - General
a. The method of lling, relling, topping up or ushing
sealed primary hot water circuits from the mains via a
temporary hose connection is only allowed if acceptable
to the local water authority.
b. Antifreeze fluid, corrosion and scale inhibitor fluids
suitable for use with boilers having aluminium heat
exchangers may be used in the central heating system.
General
1. The installation must comply with all relevant national
and local regulations.
2. Design the system for ow temperatures up to 80oC.
3. All components of the system must be suitable for
a working pressure of 3 bar and a maximum design
temperature of 110oC. Extra care should be taken
in making all connections so that the risk of leakage is
minimised.
The following components are incorporated within the
appliance:
a. Circulating pump.
b. PRV, with a non-adjustable preset lift pressure of 3
bar.
c. Pressure gauge, covering a range of 0 to 4bar.
d. An 8-litre expansion vessel, with an initial charge
pressure of 0.75 bar.
4. Makeup Water. One of the following provisionsmustbe
made for replacing system water loss:
a. Manually lled vessel
The vessel must:
Have a visible water level
Be mounted at least 150 mm above the system’s
highest point
Connect through a non-return valve to the system
Be at least 150 mm below the makeup vessel on
the return side of the radiators
b. System prepressurisation.
The e󰀩ciency of the expansion vessel will be
reduced in a pressurised system; a larger vessel
or smaller system volume may be necessary. If
the vessel’s capacity is not su󰀩cient, an additional
vessel must be installed on the return to the boiler.
If the system is not pressurised, the cold water
capacity must not exceed 143 litres.
Guidance on vessel sizing is given in table above.
1.15 SYSTEM REQUIREMENTS - CENTRALHEATING
PRV setting bar 3.0
Vessel charge pressure bar 0.5 to 0.75
System pre-charge pressure bar None 1.0
System volume Expansion vessel
(litres) volume (litres)
25 1.6 1.8
50 3.1 3.7
75 4.7 5.5
100 6.3 7.4
125 7.8 9.2
150 9.4 11.0
175 10.9 12.9
190 11.9 14.0
200 12.5 14.7
250 15.6 18.4
300 18.8 22.1
For other system volumes
multiply by the factor across 0.063 0.074
5. Filling
The system may be lled by the following method:
Where the mains pressure is excessive a pressure
reducing valve must be used to facilitate lling.
a. Thoroughly ush out the whole system with cold
water.
b. Fill and vent the system until the pressure gauge
registers 1 bar and examine for leaks.
Refer to Section
2.17
c. Check that a 15 mm diameter pipe is correctly
located and secured (using the clip supplied)
d. Check the operation of the PRV by raising the water
pressure until the valve lifts. This should occur within
0.3 bar of the preset lift pressure.
e. Check no escape of water occurs except at the
discharge point
f. Release water from the system until the
minimum system design pressure is reached;
1.0 bar if the system is to be pre-pressurised.
Model 15 18 24 30
Max CH output kW 15 18 24.2 30.3
Water ow rate l/min 10.7 13 17.2 21.5
(gal/min) (2.4) (2.8) (3.8) (4.7)
Temp di󰀨erential oC 20 20 20 20
Head available m.w.g. 5 4.5 3.3 1.9
for system (ft.w.g.) (16.2) (14.7) (10.8) (6.2)
CH Return
Ecl 6053
Hose unions
Mains
water supply
Temporary hose
(disconnect after filling)
Additional
stop valve
Double check valve
assembly
(
note direction of flow )
Table 3 Vessel Sizing
Water Flow Rate and Pressure Loss

13Installation and Servicing
Section 1 - General
The boiler does not normally need a bypass but at least
some radiators on the heating circuit, of load of at least 10%
of the minimum boiler output, must be provided with twin
lockshield valves so that this minimum heating load is always
available. See note regarding thermostatic radiator valves on
page 10.
Note. Systems incorporating zone valves which could
completely cut o󰀨 the ow through the system must also
include a bypass.
Balancing
1. Set the programmer to ON.
Close the manual or thermostatic valves on all radiators,
leaving the twin lockshield valves (on the radiators
referred to above) in the OPEN position.
Turn up the room thermostat and adjust the lockshield
valve to give an uninterrupted ow through the radiator.
These valves should now be left as set.
2. Open all manual or thermostatic radiator valves and
adjust the lockshield valves on the remaining radiators, to
give around 20oC temperature drop at each radiator.
3. Adjust the room thermostat and programmer to
NORMAL settings.
1.17 WATER TREATMENT
1.16 SYSTEM BALANCING
Central Heating
The Logic range of boilers have an ALUMINIUM alloy heat
exchanger.
IMPORTANT The application of any other treatment
to this product may render the guarantee of Ideal Heating
invalid.
Ideal Heating recommend Water Treatment in accordance
with the Benchmark Guidance Notes on Water Treatment in
Central Heating Systems.
If water treatment is used Ideal Heating recommend only the
use of SCALEMASTER SM-1 PRO, FERNOX, MBI, ADEY MC1,
SENTINEL X100 or CALMAG CM100 inhibitors and associated
water treatment products, which must be used in accordance
with the manufacturers’ instructions.
This boiler can be used with a water softener. However, the
heating system should not be lled with softened water as
any softening chemicals could enhance corrosion of certain
materials in the heating system, including aluminium and
steel. The heating system should always be lled from the
bypass on the water softener installation.
Notes
1. It is most important that the correct concentration of the
water treatment products is maintained in accordance
with the manufacturers’ instructions.
2. If the boiler is installed in an existing system any
unsuitable additives MUST be removed by thorough
cleansing. BS7593:2019 details the steps necessary to
clean a domestic heating system.
3. In hard water areas, treatment to prevent lime scale may
be necessary - however the use of articially softened
water is NOT permitted.
4. Under no circumstances should the boiler be red before
the system has been thoroughly ushed.
For further information contact:
Fernox
www.fernox.com
Tel: [phone]
Sentinel Performance Solutions
www.sentinelprotects.com
Tel: [phone]
Scalemaster Water Treatment Products
www.scalemaster.co.uk
Tel: [phone]
Calmag Ltd.
www.calmag Ltd.com
Tel: [phone]
Adey
www.adey.com
Tel: [phone]

14
Installation and Servicing
Section 2 - Installation
INSTALLATION
2.1 BOILERASSEMBLY - EXPLODED VIEW
Note that item numbers are linked to the spares list
104 CH RETURN VALVE
105 CH FLOW VALVE
108 PUMP HEAD
110 PUMP AUTO AIR VENT
113 PRESSURE RELIEF VALVE
114 PIPE - PRV OUTLET
115 PIPE - FLOW
116 PIPE - RETURN
117 PIPE - EXPANSION
VESSEL
118 EXPANSION VESSEL
120 FLOW GROUP MANIFOLD
121 BY-PASS KIT
131 WATER PRESSURE
SWITCH
135 PRESSURE GAUGE
203 GAS COCK
205 GAS VALVE
206 PIPE - GAS INJECTOR
211 INJECTOR ASSEMBLY
214 VENTURI
215 FAN
217 BURNER
218 GASKET - BURNER
219 SUMP CLEAN OUT COVER
223 FLUE MANIFOLD
224 FLUE MANIFOLD TOP
227 CLAMP RETAINING FLUE
TURRET
228 HOSE CONDENSATE
INTERNAL
229 SIPHON TRAP
231 CONDENSATE OUTLET
CONNECTION
239 CONDENSATE DRAIN TUBE
302 PCB
304 THERMISTOR RETURN
306 ELECTRODE IGNITION/
DETECTION
308 IGNITER UNIT
309 THERMISTOR FLOW
313 IGNITION LEAD
324 CONTROLS BOX LID
325 CONTROL BOX FRONT
401 HEAT ENGINE
503 WALL MOUNTING
BRACKET
504 FRONT PANEL
505 FASCIA
506 BRACKET - GAS VALVE
507 BRACKET - EXPANSION
VESSEL
505
215
224
227
118
507
504
214
223
219
211
206
313
205
217
306
308
401
506
218
116
115
228
229
302
324
325
135
114
105
203 104
120
117
131
108
304
110
121
1
0
2
3
4
bar
503
309
231
113
239

15Installation and Servicing
Section 2 - Installation
INSTALLATION
2.2 UNPACKING
The boiler is supplied fully assembled in Pack A.
Pack A Contents
1. Boiler
2. Hardware Pack Box
3. Wall Mounting Plate
4. These Installation/Users Instructions
5. Wall Mounting Template
6. Boiler Warranty
Hardware Pack
Box Contents
7. 2x Valve CH
3/4x 22 mm*
8. 1x Gas Cock
9. 1x PRV Clip
Accessory Bag Contents
10. 2x Flow/Return Valve Washers*
11. 1x Gas Cock Sealing Washer *
12. 2x Wall Plugs
13. 2x Screws
14. 1x Flue Clamp Screw
13
10
7
11
12 14
8
1
2
3
46
5
Unpack and check the contents
*Refer to Valve Washer Template inside box lid.
Refer to Section
2.17
IMPORTANT This clip needs to be tted
to ensure correct operation of the boiler.
9

16
Installation and Servicing
Section 2 - Installation
INSTALLATION
2.3 WALL MOUNTING TEMPLATE
2.4 PREPARING THE WALL
“A”
Extended centre line
155
(200)
X
Section
through wall
Side flue only
127 mm diameter hole
Rear flue only
127 mm diameter hole
Refer to Section
2.8
The wall mounting template is located on the internal
protective packaging. The template shows the position
of the xing and rear ue centre holes for a standard
installation
Care MUST be taken to ensure the correct holes are drilled.
1. Secure the template into the required position. Ensure it
is square by hanging a plumbline.
2. If tting a side ue, extend the ue centreline onto the
side by 155 mm on a standard wall x or 200 mm if
using a stand-o󰀨 bracket.
3. Mark the following on to the wall:
a The selected group of wall mounting screw holes.
b. The centre position of the ue duct. Marking both the
centre and the circumference of the ue duct.
4. Remove the template plate from the wall.
1. Check all of the hole positions before drilling.
2. Cut the ue hole with a 127 mm core boring tool, ensure
the hole is square to the wall.
3. Drill the 2 mounting holes with a 7.5 mm / 8 mm masonry
drill and insert the plastic plugs provided.
4. Locate 2 No.14 x 50 mm screws in the wall mounting plate
(one at each side, in any of the 3 holes provided at each
side) and screw home. Ensure mounting bracket is level.
2.5 FITTING THE WALLMOUNTING PLATE 2.6 MOUNTING THE BOILER
Screw the wall mounting plate to the wall using 2 wall
plugs tted previously with the 2 screws provided.
Choose one of the 2 sets of slots in left and right bank.
Ensure that at least one of the screws is tted into a top
slot and the mounting bracket is level.
esp9496
Example of fixing
1. Lift the boiler onto the wall mounting plate and locate it
over the 2 tabs.
WARNING: Ensure that, during the cutting operation,
masonry falling outside of the building does not cause
damage or personal injury.

17Installation and Servicing
FLUE OUTLET
Section 2 - Installation
2.7 FLUESAND LOCATIONS
This installation & servicing manual must be read in conjunction with ue kit and tting guide.
Flue deflector
Ideal part no.
208176
Flue extension
0.5 m, 1 m or 2 m
Weather collar
flat roof
Ideal part no.
152259
Ideal part no.
203130
Flue elbow 90°
Ideal part no.
203131
Flue elbow 45°
Horizontal flue
0.6 or 0.8 m
Ideal part no.
0.5 m 208169
0.7 m 208174
Telescopic
horizontal flue
0.5 or 0.7 m
Ideal part no.
211039
Vertical flue
terminal and
connector
Weather collar
Ideal part no.
152258
Ideal part no.
0.5 m 211037
1 m 203129
2 m 211038
Balcony flue kit
Ideal part no. 208177
Soffit kit
Ideal part no. 211302
Raised horizontal flue kit
Ideal part no. 208290
pitched roof
0.6 m 208171
0.8 m 217442
Ideal part no.
WARNING:
• It is critical that products of combustion cannot re-enter
the building
• The ue terminal must always have a free passage of
air.
CAUTION:
• White sections of the ue must not be visible outside.
• Install a ue terminal guard where the ue terminal is less
than 2 metres above a platform where persons can walk
or come into contact with the terminal.
• Water is the only permitted lubricant for ue assembly.
Rubber
Terminal
Wall Seal
Terminal
MUST be
fitted as
shown

18
Installation and Servicing
FLUE OUTLET
Section 2 - Installation
1 m
2 m
3 m
4 m
26 mm
52 mm
78 mm
104 mm
L
B
Horizontal Maximum E󰀨ective Flue Length
15-24 kW 9.0 metres
30 kW 8.0 metres
Vertical
15-30 kW 7.5 metres
Elbows increase resistance and have an e󰀨ective ue length
equivalence. The following table is an example.
Part Resistance
45oelbow 0.6 metres
90oelbow 1.0 metres
2.8 FLUESAND LOCATIONS - CONT
B = Top Clearance
Top Clearance is measure from the top of the turret to the top
of the hole where the ue terminates.
L = E󰀨ective ue length.
The e󰀨ective length of the ue is measured from the edge of
the turret to the ue terminal lip.
Flue systems that require extension kits must be installed
with a 1.5° decline from the ue terminal back to the boiler.
A 1.5° decline can be achieved by designing the ue with a
26 mm rise per meter length of ue.
Flue Terminal Positions Min. Spacing*
1. Directly below, above or alongside an opening. 300 mm
2. Below guttering, drain pipes or soil pipes. 75 mm
25 mm*
3. Below eaves. 200 mm
25 mm*
4. Below balconies or a car port roof. 200 mm
25 mm*
5. From vertical drain pipes or soil pipes. 150 mm
25 mm*
6. From an internal or external corner or a 300 mm
boundary alongside the terminal. 25 mm*
7. Above adjacent ground, roof or balcony level. 300 mm
8.
From a surface or a boundary facing the terminal. 600 mm
9. From a terminal facing a terminal. 1200 mm
10. From an opening in a car port into dwelling. 1200 mm
11. Vertically from a terminal on the same wall. 1500 mm
12. Horizontally from a terminal wall. 300 mm
13. Horizontally from an adjacent window 600 mm
14. Facing an opening into an adjacent building 2000 mm
15. At an angle to the boundary 90° 300 mm
45° 600 mm
16. Parallel to a boundary 300 mm
17. Below ground level – open light well
a) Below ground <1,000 mm
b) Above oor level 300 mm
c) From side 300 mm
d) From facing surface 600 mm
*Only one reduction down to 25mm is allowed per installation.
Table 4 - Flue Terminal Position
IMPORTANT INFORMATION
Install the ue in accordance to BS 5440:1 2008
Position the terminal, so the products of combustion do not
cause a nuisance.
The terminal outlet duct must not be closer than 25 mm to
combustible material.
The ue is secured in the wall using either sand and cement
or heatproof silicone.
The ue must be supported by a bracket every metre of ue
length and at every change of direction. Concealed ues
must have inspection hatches no more than 1.5 metres from
joints.
Where possible inspection hatches should be located at
change of directions. Where this is not possible then bends
must be viewable from both sides.
Inspection hatches must be at least 300 mm
2
.

19Installation and Servicing
FLUE OUTLET
Section 2 - Installation
2.9 HORIZONTALFLUE POSITIONS
2.10 VERTICALFLUE POSITIONS
16
17
6
7
8
9
10 11
12
13
14
15
1
2
3
4
5
1
1
6
6
7
Boundary
Boundary
600
300
300 c.
300 b.
600 d.
300
a. < 1000
3
2
1
600
345
1
2
2000
Opening in adjacent
building
14
3
1
2
300
At an angle to the
boundary
15
2
Parallel to the
boundary
16
Facing the
boundary
8
600
1
300
3
All measurements : mm
Boundary
Boundary
600
Height Difference ‘A’
Less than 300 B= 300
Greater than 300 B = 1500
300
625
fixed
2000
600
2000
690
Fixed
Separation
Distance
‘B’
Height
Difference
‘A’
300
600 600
2000
All measurements : mm
Refer to Table 5
Refer to Table 5

20
Installation and Servicing
FLUE OUTLET
Section 2 - Installation
2.11 FLUE SYSTEM DIMENSIONS 2.12 FITTING THE TURRET
Flue Design
IMPORTANT:
1. Flue lengths may vary, always measure ue lengths
before cutting.
2. E󰀨ective ue length and actual ue length are di󰀨erent
measurements.
3. E󰀨ective ue length is made up of the ue length
equivalence and the ue sections between the turret,
elbows and terminal.
4. Actual ue length is the amount of ue needed to achieve
the e󰀨ective ue length, this includes insertions.
Retaining
screw Clamp Lugs
Sample points
Flue Outlet
C
A
A - Duct Assembly
B - Flue Turret
C - Turret Clamp
D - Seal
Flue Outlet
D
B
1. Ensure the condensate trap in lled with water
2. Ensure the rubber seal is not damaged and tted
correctly on the appliance manifold.
3. Firmly hold the ue and push the turret on until it has
travelled 30 mm ensuring the ue has not rotated or
moved forward.
4. Push the turret into the manifold ensuring the upper
plastic lip is ush with the top of the manifold.
5. Fully engage the clamp location section into the manifold
location hole and rotate down onto the ange.
6. Use the securing screws to secure the clamp to the
appliance.
7. Ensure all sample points are accessible and all sample
plugs and caps are tted.
30
30
Elbow insertion (mm)Turret insertion (mm)
100mm
Edge of turret
to outside face of wall plus
44mm = ue length
A
WALL
Part Actual
Length
Insertion E󰀨ective
Length
1 m ue length 1000 mm 30 mm 970 mm
90° elbow n/a 1000 mm
1 m ue length 1000 mm 30 mm 970 mm
90° elbow n/a 1000 mm
0.6 m ue terminal 600 mm 30 mm 570 mm
Total 4.510 mm