IDEAL LOGIC+ Combi 24 User manual

INSTALLATION
AND SERVICING
LOGIC Combi
24, 30, 35
For details of document amendments, refer to page 3
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 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.
For users guide see reverse of book
January 2014
UIN 204626 A12

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Ideal Logic Combi - Installation and Servicing

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Ideal Logic Combi - Installation and Servicing
DOCUMENT AMENDMENTS
Relevant Installation changes implemented in this book from Mod Level.......... A11 (Jul 13) to A12 (Oct 13)
Ideal Stelrad Group reserve the right to vary specication without notice
Page 30
Statement added ref to commissioning process of combustion.
Page 61
New Page Added - Benchmark Commissiong & Servicing Section
Page 62 & 63
New updated Commissioning Checklist & Service Record Sheets
Page 64 & 65
New pages added, Flowchart for CO Level and Combustion Ratio Check on Commissioning a Condensing Boiler.
FOR ANY TECHNICAL QUERIES PLESE RING THE IDEAL
INSTALLER HELPLINE : 01482 498704
NOTE. BOILER RESET PROCEDURE -
To reset boiler, turn mode knob to reset position and immediately turn knob back to required setting.
The boiler will repeat the ignition sequence if a heat demand is present.
NOTES FOR THE INSTALLER

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Ideal Logic Combi - Installation and Servicing
general
Ideal Logic Combi 24 30 35
Gas supply 2H - G20 - 20mbar
Gas Supply Connection 15mm copper compression
Injector Size (mm) 4.15 4.65 4.9
Inlet Connection Domestic Hot Water 15mm copper compression
Outlet Connection Domestic Hot Water 15mm copper compression
Flow Connection Central Heating 22mm copper compression
Return Connection Central Heating 22mm copper compression
Flue Terminal Diameter mm (in) 100 (4)
Average Flue Temp-Mass Flow Rate (DHW) 63oC - 11g/s 68oC - 13g/s 73oC - 15g/s
Maximum Working Pressure (Sealed Systems) bar (lb/in2) 2.5 (36.3)
Maximum Domestic Hot Water Inlet Pressure bar (lb/in2) 10.0 (145)
Minimum Domestic Hot Water Inlet Pressure* bar (lb/in2) 0.8 (11.6) 1.3 (18.9) 1.3 (18.9)**
Electrical Supply 230 V ~ 50 Hz.
Power Consumption W 146 152 177
Fuse Rating External : 3A Internal : T4H HRC L250 V
Water content Central Heating litre (gal) 1.2 (0.26)
Domestic Hot Water litre (gal) 0.5 (0.11)
Packaged Weight kg (lb) 37.7 (83.1) 37.8 (83.3) 38 (83.8)
Maximum Installation Weight kg (lb) 32.7 (72.1) 32.8 (72.3) 33 (72.8)
Boiler Casing Size Height mm (in) 700 (27.5)
Width mm (in) 395 (15.5)
Depth mm (in) 278 (11)
Table 1 - General Data
Note. 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 different
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 ft3/h - divide the gross heat input (Btu/h)
by the gross C.V. of the gas (Btu/ft3)
c. For m3/h - multiply l/s by 3.6
Key to symbols
GB = United Kingdom IE = Ireland (Countries of destination)
PMS = Maximum operating pressure of water
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.
*Required for maximum ow rate. Boiler operates down to 2 l/min DHW delivery
** In areas of low water pressure the DHW restrictor can be removed
Maximum DHW Input : 24 30 35
Nett CV kW 24.3 30.4 35.4
(Btu/h) (82,900) (103,600) (120,900)
Gross CV kW 27.0 33.7 39.3
(Btu/h) (92,000) (115,000) (134,200)
Gas Consumption m3/h 2.512 3.135 3.657
(ft3/h) (89) (111) (129)
Maximum kW 24.2 30.3 35.3
DHW Output (Btu/h) (82,600) (103,300) (120,500)
DHW Flow Rate l/min 9.9 12.4 14.5
at 35°C temp. rise. (gpm) (2.2) (2.8) (3.2)
DHW Specic Rate l/min 11.5 14.5 16.9
(gpm) (2.5) (3.2) (3.7)
Boiler Input : Max. Min.
24 30 35
Boiler Input ‘Q’ Nett CV kW 24.3 4.9 6.1 7.1
(Btu/h) (82,900) (16,600 (20,700 (24,100)
Gross CV kW 27.0 5.4 6.7 7.9
(Btu/h) (92,000) (18,400) (23,000) (26,900)
Gas Consumption m3/h 2.512 0.500 0.627 0.734
(ft3/h) (89) (17.8) (22) (25.9)
Boiler Output :
Non Condensing kW 24.2 4.8 6.1 7.1
70oC Mean Water temp. (Btu/h) (82,600) (16,500) (20,700) (24,100)
Condensing kW 25.6 5.1 6.4 7.5
40oC Mean Water temp. (Btu/h) (87,400) (17,500) (21,800) (25,500)
Seasonal efciency* SEDBUK 2005 91% 91.1% 91%
Seasonal efciency* SEDBUK 2009 89% 89% 88.9%
NOx Classication CLASS 5
Table 2 - Performance Data - Central Heating Table 3 - Performance Data - Domestic Hot Water

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Ideal Logic Combi - Installation and Servicing
general
Boiler size G.C. Appliance No. PI No.
(Benchmark No.)
24 47-348-56 86 CL 08
30 47-348-57 86 CL 08
35 47-348-58 86 CL 08
CONTENTS
Air Supply ...................................................................... 9
Benchmark Commissioning Checklist ................ 60-61
Boiler Clearances ....................................................... 10
Boiler Exploded Diagram ........................................... 13
Condensate Drain ....................................... 9, 24, 25, 36
Electrical Connections ............................................... 27
Electrical Supply ........................................................... 9
Fault Finding .......................................................... 50-56
Flue Fitting .................................................................. 17
Flue Installation ............................................................ 8
Gas Safety Regulations ............................................... 7
Gas Supply .................................................................... 8
Installation .............................................................. 13-33
Pump ........................................................................... 46
Safe Handling ................................................................ 6
Servicing ................................................................ 34-49
Spare Parts Info .......................................................... 57
Thermostatic Radiator Valves ..................................... 9
Water and Systems ............................................9,11,12
Water & Gas Connections ......................................... 26
Water Treatment ........................................................ 12
Wiring Diagram ........................................................... 29
Natural Gas only
Destination Country: GB, IE
Boiler Page
Make and model......................................................... 5
Appliance serial no. on data badge .......... Front Cover
SEDBUK No. %.......................................................... 4
Controls
Time and temperature control to heating ................. 28
Time and temperature control to hot water ............. 31
Heating zone valves................................................ n/a
TRV’s.......................................................................... 9
Auto bypass ............................................................... 9
Boiler interlock............................................................ 9
For .................................................................... all boilers
Flushing to BS.7593................................................. 12
Inhibitor .................................................................... 12
Central heating mode
Heat input...................................................to be calculated
For assistance see Technical Helpline on the back page
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 ........................................................... 12
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................................................24-25
For all boilers: complete, sign & hand over to customer
For GB, 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
CHECKLIST AND LEAVE THESE
INSTRUCTIONS WITH APPLIANCE
IDEAL LOGIC COMBI

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Ideal Logic Combi - Installation and Servicing
general
INTRODUCTION
The Logic Combi range of boilers are wall mounted, full
sequence, automatic spark ignition, low water content, fanned
ue, high efciency, condensing, combination gas boilers.
Note. Due to the high efciency of the boiler a plume of water
vapour will form at the terminal during operation.
Central heating (CH) output is fully modulating with a range of:
24 4.8 to 24.2kW (16,500 to 82,600 Btu/h)
30 6.1 to 24.2kW (20,700 to 82,600 Btu/h)
35 7.1 to 24.2kW (24,100 to 82,600 Btu/h)
Instantaneous domestic hot water (DHW) output is also fully
modulating with a maximum of :
24 24.2kW (82,600 Btu/h)
30 30.3kW (103,300 Btu/h)
35 35.3kW (120,500 Btu/h)
The boiler is supplied fully assembled with DHW plate heat
exchanger, diverter valve, circulating pump, pressure gauge,
safety valve and CH expansion vessel.
Variable CH and DHW temperature controls are tted on the user
control and the boiler features a DHW preheat facility.
The boiler includes as standard:
- Automatic bypass
- Boiler frost protection
- Daily pump and diverter valve exercise.
The boiler casing is of white painted mild steel.
The boiler temperature controls are visible 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.
OPERATION
With no demand for CH, the boiler res only when DHW is drawn
off, or periodically for a few seconds without any DHW draw-off,
in order to maintain the DHW calorier in a heated condition.
This only occurs if pre-heat knob is in the ‘ON’ period.
When there is a demand for CH, the heating system is supplied
at the selected temperature of between 45oC and 80oC, until
DHW is drawn off. The full output from the boiler is then directed
via the diverter valve to the plate heat exchanger to supply a
nominal DHW draw-off of
24 9.9 l/min at 35 oC temperature rise.
30 12.4 l/min at 35 oC temperature rise.
35 14.5 l/min at 35 oC temperature rise.
The DHW draw off rate specied above is the nominal that the
boiler ow regulator will give. Due to system variations and
seasonal temperature uctuations DHW ow rates/temperature
rise will vary, requiring adjustment at the draw off tap.
At low DHW draw-off rate the maximum temperature is limited to
64 oC by the modulating gas control.
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.
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.

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Ideal Logic Combi - Installation and Servicing
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OPTIONAL EXTRA KITS
• HorizontalFlueTermianl1000mmlong
• Horizontal Flue Terminal 600mm long
• HorizontalTelescopicFlue
• Flue Extension Ducts (1000mm long).
24-up to 9m
30-up to 8m
35-up to 6m
• Flue Finishing Kit
• 90oElbow Kit (maximum per installation).
24-upto 6 elbows
30-upto 6 elbows
35-upto 4 elbows
• 45oElbow Kit (maximum per installation).
24-upto 6 elbows
30-upto 6 elbows
35-upto 4 elbows
• Concentric Flue Screw Retaining Kit
• Roof Flue Kit (to a maximum of 7.5m)
• Powered Vertical Flue Kit (5m primary and 17m secondary
is a typical maximum length. For alternative details refer to
Powered Vertical Instructions)
• Weather Collar
• HighLevelFlueOutletKit
• FlueDeectorKit
• BalconyFlueKit
• RaisedHorizontalFlueOutletKit
• AdjustableFlueSupportBracket
• MechanicalTimer(24hr)Kit
• ElectronicTimer(7day)kit
• RFMechanicalProgrammableRoomThermostat(24hr)
kit
• RFElectronicProgrammableRoomThermostat(7day)
kit
• WeatherCompensationKit
• Stand-OffKit
• Stand-OffKit(inc.pipes)
• DHWExpansionVesselKit
• Pre-PipingFrameKit
• CondensatePumpKit
• SecurityBracketKit
• PRVWallOutletKit
• PressureGaugeExtensionKit
SAFETY
Current Gas Safety (installation and use) regulations or rules
in force:
The appliance is suitable only for installation in GB and IE 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
• The appropriate Building Regulations either The Building
Regulations, The Building Regulations (Scotland), Building
Regulations (Northern Ireland).
• The Water Fittings Regulations or Water byelaws in Scotland.
• The 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.
In IE, the installation must be carried out by a Registered Gas
Installer (RGII) and installed in accordance with the current edition
of I.S.813 “Domestic Gas Installations”, the current Building
Regulations and reference should be made to the current ETCI
rules for electrical installation.
Detailed recommendations are contained in the following British
Standard Codes of Practice:
BS. 5440:1 Flues (for gas appliances of rated input not
exceeding 70 kW).
BS. 5440:2 Ventilation (for gas appliances of rated input not
exceeding 70 kW).
BSEN. 12828:2003 Heating Systems in buildings: Design for
water based heating systems.
BSEN 12831:2003 Heating Systems in buildings: Method for
calculation of the design heat load.
BSEN 14336:2004 Heating Systems in buildings: Installation
and commissioning of water based heating
systems.
BS. 5546 Installation of gas hot water supplies for domestic
purposes (2nd Family Gases)
BS. 6798 Installation of gas red hot water boilers of rated
input not exceeding 70 kW.
BS. 6891 Low pressure installation pipes.
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. These appliances are CE certicated for safety
and performance. It is, therefore, important that no external
control devices, e.g. ue dampers, economisers etc., are
directly connected to these appliances unless covered by
these Installation and Servicing Instructions or as otherwise
recommended by Ideal Stelrad Group in writing. If in doubt
please enquire.
Any direct connection of a control device not approved by
Ideal Stelrad Group could invalidate the certication and the
normal appliance warranty. It could also infringe the Gas Safety
Regulations and the above regulations.
SAFE HANDLING OF SUBSTANCES
No asbestos, mercury or CFCs are included in any part of the
boiler or its manufacture.

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Ideal Logic Combi - Installation and Servicing
general
GAS SUPPLY
The local gas supplier should be consulted, at the installation
planning stage, in order to establish the availability of an adequate
supply of gas. An existing service pipe must NOT be used without
prior consultation with the local gas supplier.
The boiler MUST be installed on a gas supply with a governed
meter only.
A gas meter can only be connected by the local gas supplier or
by a Gas Safe Registered Engineer. In IE by a Registered Gas
Installer (RGII).
An existing meter should be checked, preferably by the gas
supplier, to ensure that the meter is adequate to deal with the rate
of gas supply required.
It is the responsibility of the Gas Installer to size the gas
installation pipework in accordance with BS6891:2005. Whilst
the principle of the 1:1 gas valve ensures the Logic range is
able to deliver it’s full output at inlet pressures as low as 14mb,
other gas appliances in the property may not be as tolerant.
When operating pressures are found to be below the minimum
meter outlet of 19mb 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 BS 6400-1 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 below.
IMPORTANT.
Installation pipes must be tted in accordance with BS.6891. In IE
refer to IS.813:2002.
The complete installation MUST be tested for gas tightness and
purged as described in the above code.
FLUE INSTALLATION
Pluming will occur at the terminal so terminal positions where this
could cause a nuisance should be avoided.
The ue must be installed in accordance with the
recommendations of BS. 5440-1: 2008.
In IE refer to I.S. 813:2002.
The following notes are intended for general guidance:
1. The boiler MUST be installed so that the terminal is exposed
to external air.
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.
For electrical safety reasons there must be no access available
from the back of the boiler.
T
Timber Framed Buildings
If the boiler is to be tted in a timber framed building it should be
tted in accordance with the Institute of Gas Engineering document
IGE/UP/7:2006 Edition 2.
Bathroom Installations
This appliance is rated IP20.
The boiler may be installed in any room or internal space, although
particular attention is drawn to the requirements of the current
IEE (BS.7671) Wiring Regulations and the electrical provisions
of the building regulations applicable in Scotland, with respect to
the installation of the boiler in a room or internal space containing
a bath or shower. For IE reference should be made to the current
ETCI rules for electrical installations and I.S. 813:2002.
If the appliance is to be installed in a room containing a bath or
shower then, providing water jets are not going to be used for
cleaning purposes (as in communal baths/showers), the appliance
must be installed beyond Zone 2, as detailed in BS.7671.
Compartment Installations
0.6m
Zone 0
Recessed
window
Zone 2
Ceiling
3G8913a
2.25m
Zone 1
A compartment used to enclose the boiler should be designed and
constructed specially for this purpose.
An existing cupboard or compartment may be used, provided that
it is modied for the purpose.
In both cases, details of essential features of cupboard /
compartment design, including airing cupboard installation, are to
conform to the following:
• BS 6798 (No cupboard ventilation is required - see ‘Air Supply’
for details).
• The position selected for installation MUST allow adequate
space for servicing in front of the boiler.
• For the minimum clearances required for safety and
subsequent service, see the wall mounting template and
Frame 1. In addition, sufcient space may be required to
allow lifting access to the wall mounting plate.

9
Ideal Logic Combi - Installation and Servicing
general
2. It is important that the position of the terminal allows the free
passage of air across it at all times.
3. Minimum acceptable spacing from the terminal to obstructions
and ventilation openings are specied in
Table 4.
4. Where the lowest part of the terminal is tted less than 2m
(6’6”) above a balcony, above ground or above a at roof
to which people have access then the terminal MUST be
protected by a purpose designed guard.
Terminal guards are available from boiler suppliers. (Ask for
TFC ue guard model no. K6 - round, plastic coated). In case
of difculty contact:
TFC Group. Tel. + 44 (0) 01732 351 680
Tower House, Vale Rise Fax. + 44 (0) 01732 354 445
Tonbridge. Kent TN9 1TB www.tfc-group.co.uk
Ensure that the guard is tted centrally.
5. The ue assembly shall be so placed or shielded as to prevent
ignition or damage to any part of any building.
6. The air inlet/products outlet duct and the terminal of the boiler
MUST NOT be closer than 25mm (1”) to combustible material.
Detailed recommendations on the protection of combustible
material are given in BS. 5440-1:2008.
IMPORTANT. It is essential to ensure, in practice, that products
of combustion discharging from the terminal cannot re-enter the
building or buildings through any openings into the building such
as ventilators, windows, doors, or other sources of natural air
inltration, such as forced ventilation openings etc.
If products of combustion re-entry is identied or suspected this
should be immediately investigated and corrected following the
guidance provided in the current Gas Industry Unsafe Situation
Procedure.
TERMINAL
The terminal assembly can be adapted to accommodate various
wall thicknesses. Refer to Frame 14 .
AIR SUPPLY
It is NOT necessary to have a purpose-provided air vent in the
room or internal space in which the boiler is installed. Neither is
it necessary to ventilate a cupboard or compartment in which the
boiler is installed, due to the low surface temperatures of the boiler
casing during operation; therefore the requirements of BS 6798,
Clause 12, and BS 5440:2 may be disregarded.
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 BS.6798
and, in addition, for smallbore and microbore systems, BS.5449.
WATER TREATMENT - see Frame 5
BOILER CONTROL INTERLOCKS
Central heating systems controls should be installed to ensure
the boiler is switched off when there is no demand for heating, in
compliance with Building Regulations.
Heating systems utilising full thermostatic radiator valve control
of temperature in individual rooms should also be tted with a
room thermostat controlling the temperature in a space served by
radiators not tted with such a valve.
When thermostatic radiator valves are used, the space heating
temperature control over a living / dining area or hallway having
a heating requirement of at least 10% of the minimum boiler heat
output should be achieved using a room thermostat, whilst other
rooms are individually controlled by thermostatic radiator valves.
However, if the system employs thermostatic radiator valves on all
radiators, or two port valves, then a bypass circuit must be tted
with an automatic bypass valve to ensure a ow of water should
all valves be in the closed position.
ELECTRICAL SUPPLY
WARNING.
This appliance must be earthed.
Wiring external to the appliance MUST be in accordance with
the current I.E.E. (BS.7671) Wiring Regulations and any local
regulations which apply. For IE reference should be made to the
current ETCI rules for electrical installations.
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.
CONDENSATE DRAIN (Refer to Frames 22, 23 & 40)
A condensate drain is provided on the boiler. This drain must be
connected to a drainage point on site. All pipework and ttings in
the condensate drainage system MUST be made of plastic - no
other materials may be used.
IMPORTANT.
Any external runs must be in accordance with BS 6798.
The drain outlet on the boiler is sized for standard 21.5mm (3/4”)
overow pipe. It is a universal tting to allow use of different
brands of pipework.
* Only one reduction down to 25mm is allowable per installation
otherwise BS5440-1 2008 dimensions must be followed.
Flue Terminal Positions Min. Spacing*
1. Directly below, above or alongside an opening
window, air vent or other ventilation opening. 300mm (12”)
2. Below guttering, drain pipes or soil pipes. 25mm ( 1”)*
BS5440-1 2008 75mm (3”)
3. Below eaves. 25mm (1”)*
BS5440-1 2008 200mm (8”)
4. Below balconies or a car port roof. 25mm (1”)*
BS5440-1 2008 200mm (8”)
5. From vertical drain pipes or soil pipes. 25mm (1”)*
BS5440-1 2008 150mm (6”)
6. From an internal or external corner or to a 25mm (1”)*
boundary along side the terminal. BS5440-1 2008 300mm (12”)
7. Above adjacent ground, roof or balcony level. 300mm (12”)
8. From a surface or a boundary facing the terminal. 600mm (24”)
9. From a terminal facing a terminal. 1,200mm (48”)
10. From an opening in a car port
(e.g. door or window) into dwelling. 1,200mm (48”)
11. Vertically from a terminal on the same wall. 1,500mm (60”)
12. Horizontally from a terminal on the wall. 300mm (12”)
Vertical Terminals
13. Above the roof pitch with roof slope of all angles. 300mm (12”)
Above at roof. 300mm (12”)
14. From a single wall face. 300mm (12”)
From corner walls. 300mm (12”)
15. Below velux window 2000mm (79”)
16. Above or side of velux window 600mm (24”)
Table 4 - Balanced Flue Terminal Position

10
Ideal Logic Combi - Installation and Servicing
general
3952.5 2.5
from case
700
43 65 57 38
Gas Inlet
39 65
Side flue
dim. A
1 BOILER DIMENSIONS, SERVICES & CLEARANCES all dimensions in mm
The boiler connections are made on the boiler connection tails.
Refer to Frame 24.
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 (24”). Where the
space into which the boiler is going to be installed is less
than the length of ue required the ue must be tted from
the outside.
Installation from inside ONLY
b. If a core boring tool is to be used inside the building the
space in which the boiler is to be installed must be at least
wide enough to accommodate the tool.
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 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.

11
Ideal Logic Combi - Installation and Servicing
general
General
1. The installation must comply with all relevant national and local
regulations.
2. The installation should be designed to work with flow
temperatures of up to 86 oC.
3. All components of the system must be suitable for a working
pressure of 3 bar and temperature of 110 oC. 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. Safety valve, with a non-adjustable preset lift pressure of 3
bar.
c. Pressure gauge, covering a range of 0 to 4 bar.
d. An 8-litre expansion vessel, with an initial charge pressure
of 0.75 bar.
4. ‘Make-up’ Water. Provision must be made for replacing water
loss from the system, either :
a. From a manually lled ‘make-up’ vessel with a readily visible
water level. The vessel should be mounted at least 150mm
above the highest point of the system and be connected
through a non-return valve to the system, tted at least
150mm below the ‘make-up’ vessel on the return side of
the radiators. or
b. Where access to a ‘make-up’ vessel would be difcult, by
pre-pressurisation of the system.
The maximum cold water capacity of the system should
not exceed 143 litres, if not pressurized. However, if
the system is to be pressurized, the efciency of the
expansion vessel will be reduced and a larger vessel
(or smaller system volume) may be necessary. If the
capacity of the vessel is not considered sufcient for this,
or for any other reason, an additional vessel MUST be
installed on the return to the boiler.
Guidance on vessel sizing is given in Frame 2.
Notes
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 uid, corrosion and scale inhibitor uids suitable for
use with boilers having aluminium heat exchangers may be used
in the central heating system.
2 SYSTEM REQUIREMENTS - Central Heating
Water Flow Rate and Pressure Loss
Max CH Output kW 24.2
(Btu/h) (82,600)
Water ow rate l/min 17.3
(gal/min) (3.8)
Temperature Differential oC 20
(oF) (36)
Head available for m.w.g. 3.4
system (ft.w.g.) (11.1)
Safety valve 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 1bar and examine for leaks. Refer to Frame
24 for lling detail.
c. Check the operation of the safety valve by raising the
water pressure until the valve lifts. This should occur
within 0.3bar of the preset lift pressure.
d. Release water from the system until the
minimum system design pressure is reached;
1.0 bar if the system is to be pre-pressurised.
continued . . . . . .

12
Ideal Logic Combi - Installation and Servicing
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 9.
Note. Systems incorporating zone valves which could
completely cut off 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.
4 SYSTEM BALANCING
5 WATER TREATMENT
CENTRAL HEATING
The Logic Combi 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 Stelrad Group
Invalid.
Ideal Stelrad Group recommend Water Treatment in
accordance with the Benchmark Guidance Notes on Water
Treatment in Central Heating Systems.
If water treatment is used Ideal Stelrad Group
recommend only the use of SCALEMASTER GOLD 100,
FERNOX, MBI, ADEY MC1 or SENTINEL X100 inhibitors and
associated water treatment products, which must be used
in accordance with the manufacturers’ instructions.
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. BS 7593:2006 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 Cookson Electronics
Forsyth Road, Sheerwater, Woking, Surrey GU21 5RZ
[phone]
Sentinel Performance Solutions
The Heath Business & Technical Park
Runcorn, Cheshire WA7 4QX
Tel: [phone]
Scalemaster Water Treatment Products
Emerald Way, Stone, Staffordshire ST15 0SR
Tel: [phone]
Calmag Ltd.
Unit 3-6, Crown Works, Bradford Road,
Sandbeds, Keighley, West Yorkshire BD20 5LN
Tel: [phone]
Adey Professional Heating Solutions
Gloucester Road, Cheltenham GL51 8NR
Tel: [phone]
3 SYSTEM REQUIREMENTS - CONT
Domestic Hot Water
1. The DHW service must be in accordance with BS5546 & BS6700.
2. Refer to Table 1 for minimum and maximum working pressures.
In areas of low mains water pressures the domestic hot water
regulator may be removed from the DHW ow turbine cartridge.
Refer to Frame 66. The boiler will require the ow rate to be set to
obtain a temperature rise of 35oC at the tap furthest from the boiler.
3. The boilers are suitable for connection to most types of washing
machine and dishwasher appliances.
4. When connecting to suitable showers, ensure that:
a. The cold inlet to the boiler is tted with an approved anti-
vacuum or syphon non-return valve.
b. Hot and cold water supplies to the shower are of equal pressure.
5. Hard Water Areas
Where the water hardness exceeds 200mg/litre (200 ppm), it is
recommended that a proprietary scale reducing device is tted into the
boiler cold supply within the requirements of the local water company.
IMPORTANT. Provision must be made to accomodate the expansion
of DHW contained within the appliance. If the DHW inlet contains a
back ow prevention device or non-return valve, e.g. a water meter,
then a mini expansion vessel should be tted between the device and
the boiler in the cold inlet pipe.
Cold water, rising main and pipework in exposed areas need to
be suitably lagged to prevent freezing.
Note. DHW Expansion Vessel kit available from Ideal.
DOMESTIC HOT WATER
In hard water areas where mains water can exceed 200ppm Total
Hardness (as dened by BS 7593:2006 Table 2) a scale reducing
device should be tted into the boiler cold supply within the
requirements of the local water company. The use of articially
softened water, however, is not permitted.
Ideal Stelrad Group recommend the use of Fernox Quantomat,
Sentinel Combiguard,Calmag CalPhos I scale reducing devices
or Scalemaster In-line Scale Inhibitor branded Ideal, which must
be used in accordance with the manufacturers’ instructions.

13
INSTALLATION
Ideal Logic Combi - Installation and Servicing
6 BOILER ASSEMBLY - Exploded View
Note that item numbers are linked to the spares list
104 CH Return Valve
105 CH Flow Valve
106 DHW Inlet & Outlet
107 Filling Loop
108 Pump Head
110 Air Vent Pump
111 Divertor Valve Head
112 Divertor Valve Cartridge
113 Pressure Relief Valve
114 Pipe - PRV Outlet
115 Pipe - Flow
116 Pipe - Return
117 Pipe - Expansion Vessel
118 Expansion Vessel
119 Return Group Manifold
120 Flow Group Manifold
121 Plate Heat Exchanger
127 Flow Sensor Hall Effect
128 Flow Turbine Cartridge
131 Water Pressure Transducer
135 Pressure Gauge
203 Gas Cock
204 Pipe - Gas Inlet
205 Gas Valve
206 Pipe - Gas Injector
211 Injector Assy
214 Venturi
215 Fan
504 227
224
503
505
313
215
217
309
306
308
211
214
206
205
204
223
326 325 302*
104
110
114
113
121
118
507
131
128
127
120
119
117
106
203
106
107
135
105
111
231
112
228
229
303
304
116
115
219
301
401
218
307
324
108
314
506
BCC*
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
301 Ctrol Box Fixings Hings & Spring
302* Primary PCB
303 CUI Board
304 Control Thermistor (Return)
306 Electrode Ignition
307 Electrode Detection
308 Ignitor Unit
309 Thermistor Flow
313 Ignition Lead
314 Control Box Lens
324 Control Box Lid
325 Control Box Front
326 Programmer Insert
401 Heat Engine
503 Wall Mounting Bracket
504 Front Panel
505 Fascia
506 Bracket - Gas Valve
507 Bracket - Expansion Vessel
* Note that production boiler PCBs are
factory pre-set to operate for boiler range
and output. When ordering Primary PCB
as a spare, an additional Boiler Chip Card
(BCC) MUST also be purchased for your
specic boiler range and output.
Check boiler serial letter code on data
plate to obtain correct BCC.
INSTALLATION

14
INSTALLATION
Ideal Logic Combi - Installation and Servicing
7 UNPACKING
The boiler is supplied fully assembled in Pack A. A telescopic or non-telescopic ue assembly for rear or side ue outlet in Pack
B is suppled as a separate order.
Unpack and check the contents.
Pack A Contents
A Boiler
B Hardware Pack Box
C Wall Mounting Plate
D These Installation/Users Instructions
E Wall Mounting Template
F Turret Clamp
G Boiler Guarantee & Registration Pack
C
A
DF
G
B
E
204626-9452b
Boiler Guarantee
HARDWARE PACK CONTENTS
Gas Valve Pack
1. Pipe - Gas Inlet
2. Washer - Gas (blue)
3. Gas Cock
Filling Loop Pack
1. 3/8" Top Hat Washer (x2)
2. Plastic Chain (x2)
3. 3/8" Blanking Cap (x1)
4. Valve - Dbl Check Filling Loop (x1)
5. 3/8" Fibre Washer (x2)
6. 3/8" Blanking Cap Extended (x1)
7. Valve Filling Loop (x1)
8. Filling Loop with 3/8" Nuts (x1)
Return Valve Pack
1. Pipe CH Return
2. Washer CH
3. Valve Return
DHW Pack
1. Pipe DHW Outlet
2. Valve - Return DHW
3. Washer DHW (x2)
4. Pipe DHW Inlet
5. Nut 1/2"
Accessory Pack
1. Screw (x2)
2. Wallplug (x2)
3. Turret Clamp Screw (x1)
Flow Valve Pack
1. Pipe CH Flow
2. Washer CH
3. Valve Flow (with gauge)
Gas Valve Pack DHW Pack
Accessory Pack
Flow Valve Pack
Return Valve Pack
Filling Loop
11
1
1
1
5
2
3
3
3
4
2
2
2
14
5
5
2
1
2
6
8
7
3
2
3
3
3
continued . . . . .
INSTALLATION

15
INSTALLATION
Ideal Logic Combi - Installation and Servicing
9 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.
Pack B Contents Telescopic
A Telescopic ue terminal
B Flue turret
C Rubber terminal wall seal
D Screw
E Sealing Tape
F Wall Seal (white)
D
C
A
E
F
B
1
2
Pack B Contents Non-Telescopic
A Flue terminal
B Flue turret
C Rubber terminal wall seal
D Cutting Aid
E Wall Seal (white)
8 UNPACKING CONT’D
A
D
B
CE
Note. This ue system incorporates a removable ue outlet nose that utilises a push t location system. This enables the
installation of deector, high level or balcony outlet ue kits without the removal of the whole ‘B’ pack terminal. The appliance
must not be operated without the desired outlet nose correctly tted in place.
Note. Location dimples must be aligned with terminal mounting frame.
INSTALLATION

16
INSTALLATION
Ideal Logic Combi - Installation and Servicing
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. Tape template into the required position, ensuring its squareness
by hanging a plumbline as shown.
2. If tting a side ue, extend the ue centreline onto the side by
155mm on a standard wall x or 200mm if using a stand-off
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.
10 WALL MOUNTING TEMPLATE
11 PREPARING THE WALL
IMPORTANT.
Ensure that, during the cutting operation, masonry falling
outside of the building does not cause damage or personal
injury.
1. Cut the ue hole (preferably with a 5” core boring tool),
ensuring that the hole is square to the wall.
Both wall faces immediately around the cut hole should be
at.
2. Drill 2 mounting holes (marked from template) with a 7.5mm
/ 8mm masonry drill and insert the plastic plugs, provided,
for the wall mounting plate.
3. Locate 2 No.14 x 50mm 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.
13 MOUNTING THE BOILER
1. Ensure the plastic plugs are removed from both the CH
and DHW connections before mounting the boiler.
Note. boiler may contain residual water.
2. Lift the boiler onto the wall mounting plate (refer to the
Introduction section for safe handling advice), locating it
over the two tabs.
12 FITTING THE WALL MOUNTING PLATE
Screw the wall mounting plate to the wall using 2 wall plugs
(previously tted) with the 2 screws provided.
Choose one of the 2 sets of slots in left and right bank.
Ensuring that at least one of the screws is tted into a top slot
and the mounting bracket is level.
nm9279a
“A” - See Diagram in
Frame 1
Extended centre line
155
(200)
3G9495
X
Section
through wall
Note. Check all of the hole
positions before drilling.
Side flue only
5" diameter hole
Rear flue only
5" diameter hole
esp9496
Example of fixing
esp9497
INSTALLATION

17
INSTALLATION
Ideal Logic Combi - Installation and Servicing
FLUE OUTLET
14 DETERMINING THE FLUE LENGTH AND FLUE PACKS REQUIRED
IMPORTANT. The boiler must be installed in a vertical position in accordance to the installation instructions.
FLUE KITS
Telescopic Flue‘B’ Pack - contains: Flue turret, telescopic ue incorporating a terminal and rubber wall seals.
Horizontal Flue Terminal (600mm long) ‘B’ Pack - contains: Flue turret, non telescopic single piece ue incorporating a terminal
and rubber wall seals.
Horizontal Flue Terminal (1000mm long) ‘B’ Pack - Flue turret, telescopic ue incorporating a terminal, rubber wall seals and instructions.
Note. If ‘B’ packs are used on their own (either 1 piece or telescopic), then they can be tted horizontally as the ue inside is
designed to slope 1.5 degrees.
‘D’ Pack - contains: 1 metre length of ue pipe (Functional length 950mm), 1 support bracket and instructions.
When extension ‘D’ Packs are used the ue duct must incline 1.5 degrees away from the appliance, to allow the condensate to drain
back to the boiler and out of the condensate drain. It is recommended that a support bracket is tted on every 1 metre of pipe work
used and the bracket is located as close to the collar as possible. The bracketing must ensure a 1.5 degree fall back to the appliance.
Optional Flue Finishing Kit - UIN 155988 & Concentric Flue Screw Retaining Kit (Optional Kit of mechanical xing of ue joints)
Only use water as a lubricant during assembly.
The ‘B’ pack terminal is classed as part of the maximum ue length.
These ue systems incorporates a removable ue outlet nose that utilises a push t location system. This enables the installation
of deector, high level or balcony ue kits without the removal of the whole ‘B’ pack terminal. The appliance must not be operated
without the desired outlet nose correctly tted in place, ensuring the side location dimples are in line with the mounting face
allowing the correct sealing of the components.
It is IMPORTANT that all attachments are tted in accordance to the installation instructions provided with them.
The TURRET supplied in the ‘B’ Pack has an upper combustion sample point with a screw cap seal and a lower air sample point
with an air stopper seal. Ensure all caps & seals are in place.
Additional Termination Kits available for use with these ‘B’ packs.
Flue Deector Kit The resistance is the equivalent of 1 metre of ue pipe and therefore must be deducted from
any maximum ue length
High Level Flue Outlet Kit
The maximum permissible concentric ue length when using a standard (500mm) kit is 4.5 metres
Balcony Flue Outlet Kit The maximum permissible concentric ue length when using this kit is dependant on the length
of the balcony ue outlet run which combined with the concentric run must not exceed the
maximum ue length requirement of the appliance it is to be tted to
Total Maximum Permissible Horizontal Concentric Flue Length combining both ‘B’ Packs and ‘D’ Packs
(Measured from centreline of the turret to the outside of the wall terminal)
24 kW appliances Total Maximum: 9 metres - minus any ue kit options or bends
30 kW Appliances Total Maximum: 8 metres - minus any ue kit options or bends
35 kW Appliances Total Maximum: 6 metres - minus any ue kit options or bends
Total Maximum Permissible Vertical Flue Length combining both Roof Terminal and ‘D’ Packs
24, 30 & 35kW Appliances Total Maximum: 7.5 Metres - minus any bends
Powered Vertical Flue
24, 30 & 35kW Appliances Total Maximum: 5 Metres - Concentric Flue and 17m ue pipe only. For additional details
refer to the powered Vertical Instructions
90º Elbow Kit 60/100 - (Equivalent ue length resistance = 1M)
45º Elbow Kit 60/100 - (Equivalent ue length resistance = 0.6M)
Minimum Horizontal Flue Lengths (Centre line of turret to outside of wall terminal)
Telescopic Flue ‘B’ Pack = 400mm
Horizontal Flue terminal (600mm long) ‘B’ Pack = 285mm
Wall Thickness Std Metric Brick 102.5mm wide
‘B’ Pack Flue Type 60/100 Minimum permissible Wall Thickness Maximum permissible Wall Thickness
Rear Flue Rear Flue + Std-Off Side Flue Rear Flue Rear Flue + Std-Off Side Flue
Horizontal Flue Terminal
(600mm long) B Pack
116 102.5 102.5 501 456 456
Telescopic Flue B Pack 231 186 186 429 384 384
Horizontal Flue Terminal
(1000mm long) B Pack
546 501 501 761 716 716
Horizontal Flue Terminal
(1000mm long) B Pack cut 75mm
471 426 426 686 641 641
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ueonly.

18
INSTALLATION
Ideal Logic Combi - Installation and Servicing
FLUE OUTLET
100mm
Edge of turret
to outside face of wall plus
44mm = ue length
Centre of turret to edge of turret = 100mm
Turret has a ue insertion of 30mm
The compressed outer wall seal has protruding wall to seal mounting lip - 14mm
From centreline of turret to wall. Rear mount 155mm, side (including clearance) 200mm
NOTES
REAR
Fit
to wall
A
WALL
Edge of turret
to outside face of wall plus
44mm = ue length
Flue length measured from outer terminal lip
to end of outer ue
A + 44mm
REAR
Fit
to wall
inc. Stand
o Frame
A
WALL
Edge of turret
to outside face of wall plus
44mm = ue length
SIDE
Fit
to wall
A
WALL
Minimum clearance 5mm
15 DETERMINING THE FLUE LENGTH AND FLUE PACKS REQUIRED, CONT’D
Shows the ue required when measured from outside edge of turret to the outside face of the wall (to obtain cut length add 44mm)
Minimum&Maximumnisheduelengthsobtainable(dimension‘A’+44mm)
Horizontal Flue Terminal
(600mm long) B Pack
Telescopic Flue B Pack Horizontal Flue
Terminal (1000mm long)
B Pack (Telescopic)
Horizontal Flue Terminal
(1000mm long) B Pack
(Telescopic) Cut 75mm
Minimum Maximum Minimum Maximum Minimum Maximum Minimum Maximum
B Pack (Standard) 171 556 286 484 601 816 526 741
Plus 1 (1m D pack) 1121 1506 1236 1434 1551 1766 1476 1691
Plus 2 (1m D pack) 2071 2456 2186 2384 2501 2716 2426 2641
Plus 3 (1m D pack) 3021 3406 3136 3334 3451 3666 3376 3591
Plus 4 (1m D pack) 3971 4356 4086 4284 4401 4616 4326 4541
Plus 5 (1m D pack) 4921 5306 5036 5234 5351 5566 5276 5491
Plus 6 (1m D pack) 5871 6256 5986 6184 6301 6516 6226 6441
Plus 7 (1m D pack) 6821 7206 6936 7134 7251 7466 7176 7391
Plus 8 (1m D pack) 7771 8186 7886 8084 8201 8416 8126 8341
Plus 9 (1m D pack) 8721 9000 8836 9000 9000 9000 9000 9000
Max output 35 kW
Max output 30 kW
Max output 24 kW
FIGURE 1
FIGURE 2
Note. Maximum permissible
ue length is measured from
centre line of appliance ue
outlet to outside wall face.
Note; Telescopic ue B Pack or attached “D” pack extensions do not need to be cut between minimum and maximum values
shown above (except where specied). Horizontal Flue Terminal (600mm long) B Pack ue will require cutting on values
below maximum values shown in the table above.

19
INSTALLATION
Ideal Logic Combi - Installation and Servicing
FLUE OUTLET
16 CUTTING & SETTING THE FLUE LENGTH
CUT 75MM OFF HORIZONTAL FLUE TERMINAL 1000MM LONG B PACK (TELESCOPIC)
1. Measure cut ue length (A+44mm). (If required telescopic length is not between
658 and 708 then proceed to “Setting Telescopic Flue B Pack”).
2. Remove telescopic end piece from the ue body and set aside.
3. Mark the circumference 75mm from the open end of the outer ue.
4. Cut along the 75mm mark cutting onlytheouterue ensuring the cut is square.
5. Dress the cut end to make sure all burr is removed and the cut edge is in its
original shape.
6. Measure 20mm from the newly cut edge of the outer ue, place a mark at the top of the ue approximately 20mm wide &
write stop the terminal side of the line.
7. Mark the inner tube 10mm longer than the outer tube around its circumference and cut following the mark to ensure its cut
square
8. Remove all burrs and place a chamfer on the outer edge to aid assembly.
9. Re-assemble telescopic section.
SETTING TELESCOPIC FLUE B PACK
1. Measure the required ue length (A+44mm).
2. Measure from the outer terminal lip to end of outer ue. Pull apart ue until
desired length is achieved. ENSURE THE STOP MARK IS NOT VISIBLE,
IF IT IS, THE FLUE IS TOO SHORT AND SHOULD NOT BE USED.
3. Check that both ue seams are at the top and the outlet terminal is upper
most.
4. Drill a 3.5mm hole through one of the 2 outer side holes in the outer ue
section into the inserted outer ue (as shown). Take care not to pierce the
inner plastic ue. Fit screw provided.
5. Seal the joint on the outer air duct with the tape provided.
6. Fit internal and external wall seals (see installing ue)
CUTTING HORIZONTAL FLUE TERMINAL (600MM LONG) B PACK
1. Measure the required cut ue length (A+44mm). If inside the dimensions
shown in Figure 2 “1 Piece 600mm” proceed.
2. Measure from the outer terminal lip to end of outer ue. Mark the
required cut length (A+44) around the circumference of the outer ue and
cut following the mark to ensure its cut square.
3. Dress the cut end to make sure all burr’s are removed and the cut edge
is in its original shape.
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.
TELESCOPIC FLUES
TELESCOPIC FLUE B PACK SHOULD ONLY BE ADJUSTED FOR USE WITHIN ITS SPECIFIED RANGE AND MUST NOT
BE CUT
HORIZONTAL FLUE TERMINAL (1000MM LONG) B PACK (TELESCOPIC) MUST ONLY BE CUT IF REQUIRED FLUE
LENGTHS ARE BETWEEN 602 & 652MM. THIS WILL REQUIRE 75MM TO BE CUT OFF THE TERMINAL END OF THE
1000MM TELESCOPIC FLUE.
ALL OTHER LENGTHS OBTAINED USING “D” PACK EXTENSIONS IN FLUE LENGTH TABLE 1, COLUMN “HORIZONTAL
FLUE TERMINAL (1000MM LONG) B PACK CUT 75MM” (TELESCOPIC) SHOULD HAVE THE 75MM CUT OFF THE “D”
PACK EXTENSION AND NOT TELESCOPIC FLUE

20
INSTALLATION
Ideal Logic Combi - Installation and Servicing
FLUE OUTLET
17 INSTALLING THE FLUE
FITTING FLUE THROUGH THE WALL
1. Measure wall thickness and add 14mm.
2. Measure from the outer terminal lip towards the end of outer ue, place a
small location mark at the dimension acquired at point 1.
3. Add a further 14mm to the dimension, obtain at item 1 (point 1) and place
an additional small location mark.
4. Fit external black wall seal ensuring the inside of the outer lip is in contact
with the terminal lip you have been measuring from (see g 1)
5. Fit the internal wall seal approximately 65mm before the outer of
the 2 location marks.
6. For an internal t place ue terminal in the centre of the 5” drilled
hole in the wall. Apply pressure and lightly move the ue left to
right or up and down. This will cause the outer ange to fold in
and allow the ue to pass through the wall.
7. Push through a further 65mm or until the inner ange is press
against the inner wall. This will allow the outer ange to return to
its original shape.
8. Pull back the ue until the rst of the 2 location marks is level with
the internal face of the wall.
Note. If the 2 location marks are not visible then the ue is not
pulled back far enough to obtain the correct seal. If the 1st location mark has passed the face of the wall the ue has been
pulled to far back and the outer wall seal will have been dislodged from its mounting and will need to be retted.
9. When 1st mark is in line with the wall, whilst holding the ue rmly, push the white wall sealing ange to the wall until the 2nd
of the two marks is just visible. If the last location mark is clearly passed the white inner wall seal then the outer wall seal will
have been dislodged from its mounting and will need to be re-tted.
10. Ensure the seam and the outlet terminal are at the top and tted as shown.
Note. If less than 50% of the length of the ue is internal the ue should be tted from outside.
FITTING THE TURRET
1. Ensure the rubber seal is tted correctly on the appliance manifold and that all ue seals are undamaged.
2. Hold the ue rmly and push the turret on until it has travelled 30mm on to the ue pipe and is fully engaged. Make sure the
ue has not rotated or moved forward during tting and the ue seam is upper most.
3. Push the turret into the manifold ensuring the upper plastic lip is ush with the top of the manifold.
4. Fully engage the clamp location section into the manifold location holes. Rotate down on to turret ange.
5. Secure clamp to appliance using securing screw.
6. Ensure all sample points are accessible and all sample plugs and caps are tted.
Ensure lip of wall seal is positioned
over step on plastic nose of flue terminal
(note, seal is cut away for clarity)
Terminal Lip
Wall Seal Lip
Location
mark 1
Location
mark
2
Rubber
Terminal
Wall Seal
Terminal
MUST be
fitted as
shown
Retaining
screw
Clamp Lugs
Sample points
Flue Outlet
A
C
A - Duct Assembly
B - Flue Turret
C - Turret Clamp
D - Seal
Flue Outlet
D
B
Fig 1