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 Boilers.
HE12, HE15, HE18, HE24
For users guide see reverse of book
For the very latest copy of literature for specification & maintenance
practices visit our website www.idealboilers.com where you will
be able to download the relevant information in pdf format.
Packaged Boiler Contents have
been Checked by Operator Number.......
September 2009 UIN 203318 A05
2
icos - Installation & Servicing
DOCUMENT AMENDMENTS
Relevant Installation changes implemented in this book from Mod Level ........... A04 (Apr 08) to A05 (Sep 09)
Page 7, Optional Extra Kits
• Addition of Concentric flue Screw Retaining Kit & Adjustable Flue Support Bracket
Page 8, Flue Installation - Table 3
• Item 14 - new dimensions
Page 16, Frame 12 - Determining the Flue Lengths and Packs Required
• New flue kit added.
• Notes - Items 4 & 5 added
Page 18, Frame 18 - Terminal Wall Seal Assembly / Position
• New frame added ref. positioning of terminal wall seal
*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 certified by a notified body.
Key to symbols
Note.
Gas consumption is calculated using a calorific value of
38.7 MJ/m
3
(1038 Btu/ft3) gross or 34.9 MJ/m3 (935 Btu/ft3)
nett. To obtain the gas consumption at a different calorific
value:-
a. For l/s - divide the gross heat input (kW) by the gross
C.V. of the gas (MJ/m
3
b. For ft
/h - divide the gross heat input (Btu/h) by the
3
)
gross C.V. of the gas (Btu/ft3)
GB = United Kingdom IE = Ireland(Countries of destination)
PMS = Maximum operating pressure of water
C
13 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 orifices which, in this
case, are concentric. The fan is up stream of the
combustion chamber.
=An appliance designed for use on 2nd Family gas, Group
I
2H
H only.
CAUTION.
To avoid the possibility of injury during the installation, servicing or cleaning
of this appliance, care should be taken when handling edges of sheet steel components.
4
icos - Installation & Servicing
GENERAL
icos
Natural Gas only
Boiler sizeG.C. Appliance No.PI No.
Benchmark No.
HE1241 397 9587 BP 34
HE1541 397 8387 BP 34
HE1841 397 8487 BP 34
HE2441 397 8587 BP 34
Destination Countries:GB, IE
CONTENTS
Air Supply ....................................................................... 9
For GB, to comply with Building Regulations Part L1 (Part 6 in Scotland) the boiler should be fitted in accordance with the
manufacturer's instructions. Self-certification 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
BoilerPage
Make and model .......................................................5
Appliance serial no. on data badge ....... Front Cover
For all boilers: complete, sign & hand over to customer
For assistance see Technical Helpline on the back page
Page
NOTE TO THE INSTALLER:
THE BENCHMARK COMMISSIONING
CHECKLIST AND LEAVE THESE
INSTRUCTIONS WITH APPLIANCE
icos - Installation & Servicing
COMPLETE
5
GENERAL
1
BOILER WATER CONNECTIONS
The boiler flow and return pipes are supplied fitted to the boiler
ready for top connection
Notes.
a. For the heating loads in excess of 60,000 Btu/h, 28mm (1") flow
and return pipes should be used to and from the boiler.
b. This appliance is NOT suitable for use with a direct hot water
cylinder.
2
BOILER CLEARANCESall dimensions in mm (in.)
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 flue hole is cut accurately, e.g. with a core drill,
the flue 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
flue required the flue must be fitted 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.
REAR FLUE ONLY
MIN. Top clearance required = 145 mm (5 3/4")
SIDE FLUE ONLY
Horizontal length of flueTop clearance
from centre line of boilerrequired (MIN.)
to outside wallDim. A
0.5 m165 mm (6
1.0 m170 mm (6
1.5 m185 mm (7 1
2.0 m200 mm ( 7 7/8")
2.5 m210 mm (8 1
3.0 m225 mm (8 7/8")
3.5 m235 mm (9
4.0 m250 mm (10 7/8")
4.5 m260 mm (10
5.0 m275 mm (10 13/16")
5.5 m290 mm (11
6.0 m300 mm (11 13/16")
1/2")
11/16)
/4")
/4")
1/4")
1/4")
3/8")
A
Front clearance
The minimum front clearance when built in to a cupboard is
1/4") from the cupboard door but 450mm (17 3/4")
5mm (
overall clearance is still required, with the cupboard door
open, to allow for servicing.
N.B. The boiler will not fit into a standard depth wall unit. In
nm8729
order for it to do so the plastic fascia should be removed. See
Frame 41.
* Bottom clearance
after installation can be reduced to 5mm in an adequately
ventilated enclosed cupboard. However, 100mm must be
available for servicing.
6
icos - Installation & Servicing
GENERAL
INTRODUCTION
The icos range of boilersare a fully automatically controlled,
wall mounted, low water content, balanced flue, fanned,
condensing gas boiler. It has full modulating central heating
outputs of :
HE12 9.3 kW (32,000 Btu/h) to 12.0 kW (41,000 Btu/h).
HE15 8.8 kW (30,000 Btu/h) to 14.6 kW (50,000 Btu/h).
HE18 8.8 kW (30,000 Btu/h) to 17.6 kW (60,000 Btu/h).
HE24 8.8 kW (30,000 Btu/h) to 23.4 kW (80,000 Btu/h).
Due to the high efficiency of the boiler a plume of water vapour
will form at the flue terminal during operation depending on
external conditions.
The boiler casing is of white painted mild steel with the user
controls capable of being mounted remotely from the boiler, if
the option is required.
The heat exchanger is of cast aluminium.
Note.
These boilers cannot be used on systems which include gravity
circulation.
The boilers are suitable for connection to fully pumped, open
vented or sealed water systems. Adequate arrangements for
completely draining the system by provision of drain cocks
MUST be provided in the installation pipework.
OPERATION
When there is a demand for heat, the heating system is
supplied at the selected temperature of between 30oC and
82oC.
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 finding.
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 PPE 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.
OPTIONAL EXTRA KITS
• Flue Extension Ducts (1000mm long up to 6m)
• Flue Finishing Kit
o
•90
Elbow Kit (maximum 4 elbows per installation).
•45o Elbow Kit (maximum 4 elbows per installation).
• Concentric Flue Screw Retaining Kit
icos - Installation & Servicing
• Roof Flue Kit (to a maximum of 7.5m)
• Powered Vertical Flue Kit 5 m primary and 17m secondary
is a typical maximum flue length. For further details refer to
Powered Vertical Fluing Instructions.
• High Level Flue Outlet Kits
• Flue Deflector Kit
• Weather Collar
• Horizontal Flue 600mm long
• Remote User Control Kit
• Boiler Stand-off Kit
• Siphon Kit
• Condensate Pump Kit
• Adjustable Flue Support Bracket
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 Installer. 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 specific 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. 5440:1Flues (for gas appliances of rated input not
exceeding 70 kW).
BS. 5440:2Ventilation (for gas appliances of rated input not
exceeding 70 kW).
BS. 5449Forced circulation hot water systems.
BS. 5546Installation of gas hot water supplies for
domestic purposes (2nd Family Gases).
BS. 6798Installation of gas fired hot water boilers of rated
input not exceeding 60 kW.
BS. 6891Low 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 certificated for safety
and performance. It is, therefore, important that no external
control devices, e.g. flue 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 IdealStelrad Group may invalidate the certification and the normal
appliance warranty. It could also infringe the Gas Safety
Regulations and the above regulations.
7
GENERAL
SAFE HANDLING OF SUBSTANCES
Care should be taken when handling the boiler insulation
panels, which can cause irritation to the skin. No asbestos,
mercury or CFCs are included in any part of the boiler or its
manufacture.
LOCATION OF BOILER
The boiler must be installed on a flat and vertical wall, capable
of adequately supporting the weight of the boiler and any
ancillary equipment.
The boiler may be fitted 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 from the
back of the boiler.
The boiler must not be fitted outside.
Timber Framed Buildings
If the boiler is to be fitted in a timber framed building it should
be fitted in accordance with the Institute of Gas Engineering
document IGE/UP/7:1998.
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, in Scotland, 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 Ireland
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 in Zone 2, as detailed in BS.7671.
Compartment Installations
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 modified for the purpose.
In both cases details of essential features of cupboard /
compartment design, including airing cupboard installation,
are to conform to the following:
z BS. 6798. (No cupboard ventilation is required - see “Air
Supply” for details).
z The position selected for installation MUST allow adequate
space for servicing in front of the boiler.
z For the minimum clearances required for safety and
subsequent service see the wall mounting template and
Frame 2. In addition, sufficient space may be required to
allow lifting access to the wall mounting plate.
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
8
the principle of the 1:1 gas valve ensures the icos HE 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 integral appliance isolation valve and boiler pipework could
further reduce the operating pressure by up to 1.5mb when
measured at the inlet test point on the appliance gas valve.
Therefore it has been identified that an operating pressure as
low as 16.5mbar could be measured at the appliance inlet
pressure test point on the gas valve.
IMPORTANT.
Installation pipes MUST be fitted in accordance with BS. 6891.
In IE refer to I.S.813:2002. Pipework from the meter to the boiler
MUST be of an adequate size.
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 which
would cause a nuisance should be avoided.
The flue must be installed in accordance with the
recommendations of BS.5440-1:2000. 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.
2. It is important that the position of the terminal allows the free
passage of air across it at all times.
Table 3 - Balanced Flue Terminal Position
Flue Terminal Positions
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 200075mm (3")
3. Below eaves.25mm (1")*
BS5440-1 2000200mm (8")
4. Below balconies or a car port roof.25mm (1")*
BS5440-1 2000200mm (8")
5. From vertical drain pipes or soil pipes.25mm (1")*
BS5440-1 2000150mm (6")
6. From an internal or external corner or to a25mm (1")*
boundary along side the terminal.BS5440-1 2000 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 flat roof.300mm (12")
14. From a single wall face.300mm (12")
From corner walls.300mm (12")
* Only one reduction down to 25mm is allowable per installation
otherwise BS5440-1 2000 dimensions must be followed.
Min. Spacing*
icos - Installation & Servicing
GENERAL
3. Minimum acceptable spacing from the terminal to
obstructions and ventilation openings are specified in Table 3.
4. Where the lowest part of the terminal is fitted less than 2m
(6'6") above a balcony, above ground or above a flat roof to
which people have access, then the terminal MUST be
protected by a purpose designed guard.
Ensure that the guard is fitted centrally.
Terminal guards are available from boiler suppliers. Ask for
TFC Flue Guard Model No. K6 (round plastic-coated). In
case of difficulty contact:
5. The flue 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.5440-1:2000. In IE
refer to I.S.813:2002.
IMPORTANT.
It is absolutely ESSENTIAL to ensure, in practice, that products
of combustion discharging from the terminal cannot re-enter
the building or any other adjacent building through ventilators,
windows, doors, other sources of natural air infiltration, or
forced ventilation / air conditioning.
If this should occur the appliance MUST be turned OFF,
labelled as 'unsafe' until corrective action can be taken.
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. In
IE the requirements of I.S.813:2002 may be disregarded.
WATER CIRCULATION SYSTEM
IMPORTANT.
A minimum length of 1 metre of copper pipe MUST be fitted to
both flow and return connections from the boiler before
connection to any plastic piping.
For the types of system and correct piping procedure see
Frames 1, and 3 to 8.
The central heating system should be in accordance with
BS.6798 and, in addition, for smallbore and microbore
systems, BS.5449.
Graph 1 - Water flow rate and pressure loss
1.0
0.5
WATER TREATMENT - see Frame 9
The hot water storage cylinder MUST be of the indirect type and
should preferably be manufactured of copper.
Single feed, indirect cylinders are not recommended and MUST
NOT be used on sealed systems.
The appliances are NOT suitable for gravity central heating nor
are they suitable for the provision of gravity domestic hot water.
The hot water cylinder and ancillary pipework, not forming part
of the useful heating surface, should be lagged to prevent heat
loss and any possible freezing - particularly where pipes run
through roof spaces and ventilated underfloor spaces.
The boiler must be vented.
The hydraulic resistance of the boilers, at MAXIMUM OUTPUT,
with an 11
Graph 1.
o
C (20 oF) temperature differential, is shown in
BOILER CONTROL INTERLOCKS
Ideal Stelrad Group recommend that heating systems utilising
full thermostatic radiator valve control of temperature in
individual rooms should also be fitted with a room thermostat
controlling the temperature in a space served by radiators not
fitted with such a valve as stated in BS. 5449.
Central heating systems controls should be installed to ensure
the boiler is switched off when there is no demand for heating
or hot water.
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 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 without end switches,
then a bypass circuit must be fitted with an automatic bypass
valve to ensure a flow 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 Ireland reference should be made
to the current ETCI rules for electrical installations.
The point of connection to the mains should be readily
accessible and adjacent to the boiler.
NOTE: THE FAN VOLTAGE IS 325V DC
CONDENSATE DRAIN - Refer to Frames 23 & 49
A condensate drain is provided on the boiler. This drain must
be connected to a drainage point. All pipework and fittings in
the condensate drainage system MUST be made of plastic - no
other materials may be used.
IMPORTANT.
Any external runs must be insulated.
The drain outlet on the boiler is standard 21.5mm (3/4”)
overflow pipe.
Pressure Drop Across Boiler
(metres water)
8.811.714.717.620.5
Boiler Output (kW)
icos - Installation & Servicing
Ecl 1603
23.4
9
GENERAL
3
OPEN VENT SYSTEM REQUIREMENTS
The system should be vented directly off the boiler flow pipe, as
close to the boiler as possible. The cold feed entry should be
inverted and MUST be positioned between the pump and the vent,
and not more than 150mm (6") away from the vent connection.
Note.Combined feed and vent pipes may also be fitted.
There should be a minimum height 450mm (18") of open vent
above the cistern water level. If this is not possible refer to
Frame 5. The vertical distance between the highest point of the
system and the feed/expansion cistern water level MUST not be
less than 450 mm (18"). The pump must be fitted on the flow side of
the boiler.
A suitable pump is a domestic circulator capable of providing a
maximum 11
whole of the heating circuit open (e.g. Grundfos UPS 15/50, 15/60 or
equivalent). With the minimum flow circuit allowed by the controls the
differential must not exceed 25 oC. (18oC for the HE15)
The vertical distance between the pump and feed/expansion cistern
MUST comply with the pump manufacturer's minimum requirements, to
avoid cavitation. Should these conditions not apply either lower the
pump position or raise the cistern above the minimum requirement
specified by Ideal Stelrad Group. The isolation valves should be fitted
as close to the pump as possible.
o
C (20oF) temperature differential across the boiler with the
Return & flow
connections
load 30 - 60 = 22 mm
load 70 - 80 = 28 mm
4
SCHEMATIC PIPEWORK AND SYSTEM BALANCING
The boiler does not normally need a bypass but at least some
radiators on the heating circuit, of load 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 footnote re. thermostatic radiator valves).
Balancing
1. Set the programmer to ON for both CH
and HW. Turn the cylinder thermostat
down. 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
these lockshield valves to give boiler flow
and return temperatures not more than
o
C apart. These valves should now be
20
left as set.
2. Open all manual or thermostatic radiator
valves and adjust the lockshield valves
on remaining radiators to give around
o
11
C temperature drop at each radiator.
3. Turn up the cylinder thermostat and
adjust the cylinder balancing valve so
that the cylinder achieves a maximum
flow consistent with adequate flow to the
radiators. Check that with only the
domestic hot water loop in circuit a
differential temperature of 20
the boiler is not exceeded.
4. Adjust room and cylinder thermostats
and programmer to NORMAL settings.
o
C across
10
icos - Installation & Servicing
GENERAL
Non-return
valve
Automatic
air vent
Hose unions
Additional
stop valve
Hose connector
Hosepipe
(disconnect
after filling)
Double check valve
assembly
(note direction of flow)
Temporary hose
(disconnect
after filling)
ecl6060
5
LOW HEAD AND LARGE SYSTEMS WITH EXTENSIVE PIPE RUNS - OPEN VENT
This arrangement is useful for large systems where
radiators at the extremities are difficult to vent. This can
lead to pumping over with conventional feed and vent
arrangements.
The following conditions MUST be observed:
1. The top of the automatic air vent must be below the
cold water level.
2. The static water level (cold) must be at least 200mm
above the top of the horizontal flow pipe, fitted as
shown. The vent connection MUST NOT be made
immediately off the top of the boiler as venting is
made less efficient.
3. The maximum practical length of 22mm cold feed pipe
should be used in order to reduce the effective volume
of hot system water expanding into the feed/expansion
cistern to a minimum.
All dimensions in mm (in.).
Note. The pump manufacturers' minimum requirements must be complied with.
6
SEALED SYSTEM REQUIREMENTS
Notes.
a. The method of filling, refilling, topping up or flushing
sealed primary hot water circuit from the mains via a
temporary hose connection is
only allowed if
acceptable to the
local water authority.
NB. Imperial dimensions are approximate
b. When installing the
filling device, it must be
connected as shown to
fully comply with the
water regulations. This
may involve the fitting of
an additional WRAS
approval isolator valve
to the mains supply.
1. General
a. The installation
must comply with the
requirements of BS. 6798
and BS. 5449.
b. The installation should be designed to work with
flow temperatures of up to 82
o
C.
c. All components of the system, including the heat
exchanger of the indirect cylinder, must be
suitable for a working pressure of 3 bar (45lb/in
and temperature of 110oC. Care should be taken
in making all connections so that the risk of
leakage is minimised.
2. Safety Valve
A spring loaded safety valve complying with the
relevant requirements of BS. 6759 must be fitted in
the flow pipe as close to the boiler as possible and
with no intervening valve or restriction. The valve
should have the following features:
icos - Installation & Servicing
2
)
a. A non-adjustable preset lift pressure not exceeding
3bar (45lb/in
2
).
b. A manual testing device.
c. Provision for connection of a discharge pipe.
The valve or discharge pipe should be positioned so
that the discharge of water or steam cannot create a
hazard to the occupants of the premises or cause
damage to electrical components and wiring.
3. Pressure Gauge
A pressure gauge covering at least the range 0-4 bar
(0-60 lb/in
2
) must be fitted to the system. The gauge
should be easily seen from the filling point and should
preferably be connected at the same point as the
expansion vessel.
11
GENERAL
SEALED SYSTEM REQUIREMENTS - continued
7
4. Expansion Vessel
a. A diaphragm type expansion vessel must be
connected to a point close to the inlet side of the
pump, the connecting pipe being not less than 15 mm
1/2" nominal) size and not incorporating valves of
(
any sort.
b. The vessel capacity must be adequate to accept the
expansion of the system water when heated to
o
110
C (230oF).
c. The charge pressure must not be less than the
static water head above the vessel. The pressure
attained in the system when heated to 110
F) should be at least 0.35 bar (5 Ib/in2) less than the
lift pressure of the safety valve.
For guidance on vessel sizing refer to the table in
Frame 8.
For further details refer to BS. 5449, BS. 7074:1 and
the British Gas Corporation publication 'Material and
Installation Specifications for Domestic Central
Heating and Hot Water'. For IE refer to the current
edition of I.S.813.
5. Cylinder
The cylinder must be either of the indirect coil type or a
direct cylinder fitted with an immersion calorifier which is
suitable for operating on a gauge pressure of 0.35 bar
2
) in excess of the safety valve setting. Single feed
(5 Ib/in
indirect cylinders are not suitable for sealed systems.
6. Make-up Water
Provision must be made for replacing water loss from the
system, either:
a. From a manually filled make-up vessel with a readily
visible water level. The vessel should be mounted at
least 150 mm (6") above the highest point of the
system, and be connected through a non-return valve
to the system, fitted at least 300 mm (12") below the
make-up vessel on the return side of the domestic
hot water cylinder or radiators.
or
b. Where access to a make-up vessel would be difficult
by pre-pressurisation of the system. Refer to 'Filling',
below.
7. Mains Connection
There must be no direct connection to the mains water
supply or to the water storage tank supplying domestic
water, even through a non-return valve, without the
approval of the local water authority.
8. Filling
The system may be filled by one of the following
methods:
a. Through a cistern, used for no other purposes, via a
ball valve permanently connected directly to a service
pipe and/or a cold water distributing pipe.
The static head available from the cistern should be
adequate to provide the desired initial system design
o
C (230
pressure. The cold feed pipe from the cistern should
include a non-return valve and a stop valve with an
automatic air vent connected between them, the stop
valve being located between the system and the
automatic air vent. The stop valve may remain open
during normal operation of the system if automatic
water make-up is required.
b. Through a self-contained unit comprising a cistern,
pressure booster pump (if required) and, if necessary,
an automatic pressure reducing valve and flow
o
restrictor. The cistern should be supplied through a
temporary connection from a service pipe or cold
water distributing pipe.
This unit may remain permanently connected to the
heating system to provide limited automatic water
make-up. Where the temporary connection is supplied
from a service pipe or distributing pipe which also
supplies other draw-off points at a lower level then a
double check valve shall be installed upstream of the
draw-off point.
c. Through a temporary hose connection from a draw-off
tap supplied from a service pipe under mains
pressure. Where the mains pressure is excessive a
pressure reducing valve shall be used to facilitate
filling.
The following fittings shall form a permanent part of
the system and shall be fitted in the order stated:
A stop valve complying with the requirements of
BS. 1010, Part 2 (the hose from the draw-off tap shall
be connected to this fitting).
A test cock.
A double check valve of an approved type.
• Thoroughly flush out the whole of the system with
cold water, without the pump in position.
• With the pump fitted, fill and vent the system until the
pressure gauge registers 1.5 bar (21.5lb/in
2
).
Examine for leaks.
• Check the operation of the safety valve by manually
raising the water pressure until the valve lifts. This
should occur within ± 0.3 bar (± 4.3lb/in
2.
) of the
preset lift pressure.
• Release water from the system until the initial system
design pressure is reached.
• Light the boiler and heat the system to the maximum
working temperature. Examine for leaks.
• Turn off the boiler and drain the system while still hot.
• Refill and vent the system.
• Adjust the initial pressure to the required value.
Sizing procedure for expansion vessels: The volume of the expansion vessel (litres) fitted to a sealed system shall not be
less than that given by the table on the following page, multiplied by a factor of 0.8 (for flow temperatures of less than 83
C).
12
o
icos - Installation & Servicing
GENERAL
8
SEALED SYSTEM REQUIREMENTS - continued
Safety valve setting3.0 bar2.5 bar2.0 bar
Vessel charge and initial0.51.01.50.51.01.50.51.0
system pressurebarbarbarbarbarbarbarbar
Total water content of systemExpansion vessel volume litres
litres
252.12.73.92.33.35.92.85.0
504.25.47.84.76.711.85.610.0
756.38.211.77.010.017.78.415.0
1008.310.915.69.413.423.711.320.0
12510.413.619.511.716.729.614.125.0
15012.516.323.414.120.135.516.930.0
17514.619.127.316.423.441.419.735.0
20016.721.831.218.826.847.422.640.0
22518.724.535.121.130.153.325.445.0
25020.827.239.023.533.559.228.250.0
27522.930.042.925.836.865.131.055.0
30025.032.746.828.240.271.133.960.0
Multiplying factors for
other system volumes0.08330.1090.1560.0940.1340.2370.1130.20
9
WATER TREATMENT
The icos boiler range have an ALUMINIUM alloy heat exchanger
IMPORTANT.
Stelrad Group invalid.
Ideal Stelrad Group
Treatment in Central Heating systems.
Ideal Stelrad Group recommend the use of FERNOX-COPAL or MB1 or GE Betz Sentinel X100 inhibitors and
associated water treatment, which must be used in accordance with the manufacturers' instructions. For further
information contact:
The application of any other treatment to this product may render the guarantee of Ideal
recommend water treatment in accordance with the Benchmark Guidance Notes on Water
Sentinel Performance Solutions
The Heath Business & Technical Park
Runcorn
Cheshire
WA7 4QX
Tel: 0800 389 4670
www.sentinel-solutions.net
Salamander Engineering Ltd
The Heath Business &
Technical Park
Runcorn
Cheshire
WA7 4QX
Tel: +44 (0) 121 3780952
Tel: +44 (0) 1799 521133
Notes
1. It is most important that the correct concentration of the water
treatment product 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 central heating system.
3. In hard water areas, treatment to prevent lime scale
may be necessary - however, the use of artificially
softened water is NOT permitted.
4. Under no circumstances should the boiler be fired
before the system has been thoroughly flushed.
icos - Installation & Servicing
13
nm8744b
40
94
40
10
INSTALLATION
INSTALLATION
BOILER ASSEMBLY - Exploded view
LEGEND
1.Front casing panel.
2.Sealing panel
3.Sump cover plate.
4.Bottom casing panel.
5.Flue sensing nipple.
6.Return pipe.
7.Flow pipe.
8.Flue manifold.
10. Interpanel.
11. Burner assy.
12. Combustion chamber
Insulation.
13. Heat exchanger
14. Injector & housing
15. Venturi assy.
16. Fan assy.
17. Gas pipe assy.
19. Gas control valve assy.
20. Fan bracket assy.
21. Orifice plate.
22. Flue thermistor.
23. Control thermistor.
24. Overheat thermostat.
25. Ignition electrode.
26. Flame detection electrode.
32. 'S' trap
33. Control assy.
40. Spark generator
44. Wall mounting plate.
53. Turret gasket kit.
94. Ignition lead
14
icos - Installation & Servicing
INSTALLATION
11
UNPACKING
The boiler is supplied fully assembled in one Pack A,
together with a telescopic flue assembly for lengths up to
595mm, rear or side flue outlet, in Pack B.
Unpack and check the contents.
Pack A Contents
AThe boiler
BWall mounting template
on cardboard
CWall mounting plate
D1 year guarantee form
EThese Installation & Servicing/
User’s Instructions
FHardware pack
B
C
A
D
E
INSTALLATION
F
nm9315
Hardware Pack
A 50mm x No.14 wood screws - 3 off
B Wall plugs (TP2B ) - 3 off
C Push-in caps - 6 off (Refer to Frame 36 no. 15)
D Mains connector - 1 off
B Pack Contents
A Telescopic flue terminal
B Flue turret
C Rubber Terminal Wall Seal
D Screw
E Sealing Tape
B
icos - Installation & Servicing
A
B
D
C
nm8465
A
D
E
C
isfu8751d
15
INSTALLATION
12
PACKAGING REMOVAL
1. Ensure the boiler is stood correctly, as marked on
the carton.
2. Cut and remove the strapping.
3. Fold back the top flaps to gain access to the wall
mounting plate, literature and wall mounting card
template.
4. Remove the instructions and read thoroughly before
unpacking the product.
5. When ready for installation lift off the outer sleeve.
INSTALLATION
6. Remove the top protection packing/template and
save for further use.
7. Remove the two packaging ends.
8. Remove the hardware pack from under the pipes
and keep in a safe place.
13
FRONT AND BOTTOM PANEL REMOVAL
1. To remove the front panel remove the 2 screws from the
bottom panel.
2. Lift the panel up and off the top pegs.
3. To remove the bottom panel remove the 2 screws.
4. Pull the RH side of the panel down. Slide it to the right
and withdraw.
7
3
5
8
6
7
nm9282
16
nm 7802
3
1
icos - Installation & Servicing
INSTALLATION
Wall Thickness X
160 mm
160 + S = 193mm
nm8943
195mm
195mm
Wall Thickness X
Side flue length L
14
DETERMINING THE FLUE LENGTH AND FLUE PACKS REQUIRED
IMPORTANT. The boiler MUST be installed in a vertical position.
Dimension X - Wall thickness.
Dimension L - Wall thickness plus boiler spacing.
Dimension S - Stand-off frame depth = 33mm.
Note. MAXIMUM FLUE LENGTHS:
HORIZONTAL FLUE - 6M
ROOF FLUE KIT - 7.5M
POWERED VERTICAL FLUE KIT - 5m primary and 17m secondary is a typical maximum
length. For alternative details refer to Powered Vertical
(Centre Line of turret to outside of wall terminal)- ONE PIECE TERMINAL = 285MM
Instructions.
FLUE KITS
Pack B - supplied as standard.
Pack D - optional extension kit for side flue or rear flue outlet.
Finishing Kit - supplied as an optional extra.
Screw Kit - Optional kit for mechanical fixing of flue joints
Refer to 'Flue Extension Ducts'’
SIDE FLUE
REAR FLUE
Notes.
1. When extension ‘D’ packs are used the flue duct MUST be inclined
at 1.5 degrees to the horizontal to allow condensate to drain back
into the boiler and out through the condensate drain.
2. If the telescopic ‘B’ pack or horizontal flue terminal (600 long) only
are used, they may be mounted horizontally. The 1.5 degrees is
taken care of by the inclination of the flue within the air pipe
3. If the boiler is to be installed with downward piping routed behind
the boiler then the optional stand-off kit should be used. Care must
be taken when cutting the ducts and marking the wall to suit this
condition.
4. If the boiler is to be installed with upward piping routed behind the
boiler then the optional stand-off kit should be used. Care must be
taken when cutting the ducts and marking the wall to suit this
condition.
5. Only use water as a lubricant during assembly.
It is recommended that a support bracket is fitted for every 1 metre of extension pipe used and also at every joint to ensure
pipes are held at the correct angle. If a slip joint coupling is used then a support bracket must be used to secure the collar.
icos - Installation & Servicing
Total Flue length dimensionFlue
(measuring from CL of turret to outside wall)
Rear flueSide flueExtra packs
dim. X+160 dim. L+195r equired
Up to 595 mmUp to 595 mmnone
Up to 1545 mmUp to 1545 mmPack D - 1 off
Up to 2495 mmUp to 2495 mmPack D - 2 off
Up to 3445 mmUp to 3445 mmPack D - 3 off
Up to 4395 mmUp to 4395 mmPack D - 4 off
Up to 5345 mmUp to 5345 mmPack D - 5 off
Up to 6000 mmUp to 6000 mmPack D - 6 off
FLUE OUTLET
17
15
nm9283
V - See Diagram Below
Extended centre line
155
FLUE ASSEMBLY - Exploded View
An optional flue duct extension kit is required
for wall thicknesses greater than :
Side 395mm
Rear 435mm
LEGEND
1. Duct assembly.
2. Flue turret.
3. Turret gasket.
4. M5 x 10 pozi screw.
5. Turret clamp.
INSTALLATION
1
Rear flue arrangement shown
16
WALL MOUNTING TEMPLATE
The wall mounting template is located on the internal top
protective packaging.
Note.
The template shows the positions of the fixing holes and
the rear flue hole centre for standard installation. Care
MUST be taken to ensure the correct holes are drilled.
1. Tape template into the selected position. Ensure
squareness by hanging a plumbline as shown.
2. If fitting a side flue extend the flue centre line onto the side
wall and measure in 155mm for standard installation.
Note. If using stand-off kit distance increases to 188mm.
3. Mark onto the wall the following:
a The wall mounting plate screw positions (choose one
from each side with preference to top holes).
b. The position of the flue duct hole (see diagram below).
Note. Mark the centre of the hole as well as the
circumference.
4. Remove the template from the wall.
nm8752
FLUE OUTLET
18
nm8731
icos - Installation & Servicing
INSTALLATION
var9784
Rubber
Terminal
Wall Seal
17
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 flue 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 flat.
2. Drill 3 holes with a 7.5mm / 8mm masonry drill and
insert the plastic plugs provided, for the wall
mounting plate and the jacking screw plate.
Note.
If using the stand-off kit then drill 4 holes (choosing
one from each group but not the jacking screw).
3. Locate 2 No.14 x 50mm screws in the piping frame
(one at each side, in any of the 3 holes provided at
each side) and screw home.
Note.
If using the stand-off kit then locate the stand-off
channel and screw home.
18
TERMINAL WALL SEAL ASSEMBLY / POSITIONING
Prior to fitting the flue, the rubber terminal wall seal provided
in the flue pack MUST be fitted to the flue terminal as shown
below in Figure 1.
FIGURE 1FIGURE 2
Wall Seal Lip
Step
Ensure lip of wall seal is positioned
over step on plastic nose of flue terminal
(note, seal is cut away for clarity)
isfu9783
Once the flue is installed it is IMPORTANT that the rubber
terminal wall seal is pressed against the outside wall to
create an adequate seal between the flue and wall as
shown in Figure 2.
icos - Installation & Servicing
FLUE OUTLET
19
INSTALLATION
19A
SETTING THE FLUE - REAR Wall thicknesses of 210 to 435mm
Notes.
a. If using the extension ducts go to Frame 18.
b. If the stand-off frame is used it is essential to add
33mm to dimension X.
c. For shorter flue requirements less than 210mm,
use non telescopic B Pack.
1. Measure and note wall thickness X. Refer to Frame
12.
2. Add 75mm to dimension X and set telescopic flue
length as indicated in drawing.
3. Using a 3.5mm drill bit, drill one hole in outer air
duct taking care not to pierce plastic inner flue.
4. Fix to length using self tappers provided.
5. Seal outer air duct using the tape provided.
Drill hole
Adhere sealing tape
X + 75
Measurement to be
taken from this point
nm8944
19B
SETTING THE FLUE - SIDEWall thicknesses of 170 to 395mm
Notes.
a. If using the extension ducts go to Frame 18.
b. For shorter flue requirements use non telescopic B
Pack.
1. Measure and note wall thickness X. Refer to Frame 14.
2. Measure distance from side of boiler to inside of wall
and add to wall thickness X=L. Refer to Frame 14.
3. Add 115mm to dimension L and set telescopic flue
length as indicated in drawing.
4. Using a 3.5mm drill bit, drill one hole in outer air duct
taking care not to pierce plastic inner flue.
5. Fix to length using self tappers provided.
6. Seal outer air duct using the tape provided.
Drill hole
Adhere sealing tape
FLUE OUTLET
20
L + 115
Measurement to be
taken from this point
nm8945
icos - Installation & Servicing
INSTALLATION
nm8733
Boiler
Standard flue
Terminal grille
Flue length
Extension flue
20
FLUE EXTENSION DUCTS - For total flue lengths greater than 595mm
Pack D Flue extension duct kit contents.
Extension duct & clamp
1.0m (39") long
nm8732
21
FLUE EXTENSION DUCTS - continued
Use a maximum of 6m extended flue ONLY
Flue duct support
General arrangement
1. A maximum of 6 extension ducts (one suitably
cut) plus the standard flue duct may be used
together.
Flue support cutting aid
(shown folded up)
Wall plugs - 4 off
No. 10 x2" wood screw - 4 off
2. Flue extensions of greater length than 1m (39")
should be supported with the bracket provided,
suitably adjusted. Refer to Frame 20 & 26.
3. Only use water as a lubricant during assembly.
Note. Side flue shown
20
FITTING THE KIT
Because of the flexibility of the telescopic flue terminal it is not
always necessary to cut an extension pack.
1. Measure the total flue length from the centre of the boiler
outlet to the outside wall.
2. Subtract 70mm from this dimension.
3. Subtract 950mm for each ‘D’ pack to be used.
4. If the remainder Y is 300mm -
525mm this can be taken up
by the adjustment in the
telescopic flue.
5. If the remainder Y is 525mm 950mm it will be necessary to
cut a ‘D’ pack to 400mm.
70
6. if the remainder Y is less than 300mm, shorten the
previous ‘D’ pack to 400mm and adjust the telescopic
terminal.
7. Measure and mark the length on the flue, to ensure a
square cut mark the flue all the way around and cut to
length.
L
950
Y
525
300
icos - Installation & Servicing
esp8940
FLUE OUTLET
21
23
BOILER
cla7771b
Sink constitutes
air break
DRAIN
Ground Level
Open end of pipe
direct into gulley
below grating but
above water level
cla9252
75mm trap
DRAIN
Sink
Ground Level
Open end of pipe
direct into gulley
below grating but
above water level
BOILER
Air Break
INSTALLATION
155mm
CONDENSATE DRAIN
Front ViewSide View
Condensate
drain
INSTALLATION
The condensate drain provided on the boiler must be
connected to a drainage point, preferably within the
building.
Ensure that the condensate trap is full of water before
commissioning the boiler. Refer to Frame 27.
The routing of the drain must be made to allow a minimum
fall of 1 in 20 away from the boiler, throughout its length.
The drainage pipework must be arranged so that
obstruction (e.g. through freezing) of external drainage pipe
does not give rise to spillage within the dwelling.
IMPORTANT. If excessive external pipework cannot be
avoided an additional siphon kit and insulation are
recommended, in order to prevent possible freezing.
All pipework and fittings in the condensate drain system
must be made of plastic. No other materials may be used.
The drain outlet on the boiler is standard 21.5mm overflow
pipe. This size must not be reduced in any part of its
length.
A plastic cap is fitted to the end of the condensate drain
adapter this must be removed before connection is made.
nm8734
If external condensate pipe run is greter than 3m then pipe
must be 32mm nominal diameter. Consideration must be
given to insulating external condensate pipe runs.
24
CONDENSATE PIPE TERMINATION CONFIGURATIONS
Note. ALL PIPE RUNS MUST BE IN ACCORDANCE WITH BS6798
1. INTERNAL TO SINK WASTE
UPSTREAM OF SINK WASTE
TRAP
2. INTERNAL TO SINK WASTE
DOWNSTREAM OF SINK
WASTE TRAP (PREFERRED
METHOD)
22
continued . . . .
icos - Installation & Servicing
INSTALLATION
BOILER
External
wall
Ground Level
Termination
to Soak away
cla7774
minimum
500mm
25
CONDENSATE PIPE TERMINATION CONFIGURATIONS . . . continued
3. INTERNAL CONNECTION TO SOIL AND VENT STACK
Termination into a down pipe can take place providing it can be confirmed that
the down pipe is part of a combined waste and rain water system.
* Make connection to SVP using a solvent welded saddle
4. TERMINATION TO SOAK AWAY
BOILER
cla9253
Air Break
INSTALLATION
5. TERMINATION TO DRAIN / GULLEY
BOILER
icos - Installation & Servicing
External
wall
Open end of pipe
direct into gulley
below grating but
above water level
cla7775
Ground Level
DRAIN
23
nm8755
2
1
3
26
MOUNTING THE BOILER
INSTALLATION
1. Lift the boiler onto the wall mounting plate, as
shown.
2. Check the boiler alignment using a spirit level
and adjust as necessary with the jacking screw.
3. Align the hole in the jacking plate with the predrilled hole in the wall and fix in position with the
No.10 x 2" screw provided.
4. Fit condensate union connection
INSTALLATION
1
27
CONNECTING THE FLUE TO THE BOILER
Note.
Before fitting the flue turret fill
the condensate trap within the
boiler by pouring a cupful of
water into flue outlet A.
Make sure the plastic cap is
removed from the end of the
condensate drain adapter.
Take care to ensure that the
water is only poured into the flue
outlet, and does not spill into the
boiler casing.
1. Locate the flue into the turret.
2. Insert the flue assembly through the prepared hole in the
wall. Push through and pull back to seal against outside
wall face.
3. Locate the flue turret on the top of the boiler, ensuring that
the turret gasket is in place. Also ensure the turret is
located concentric with the flue aperture on the boiler top
panel. Check that the flue seal (at A) located in the top of
the flue manifold is secure and giving an effective seal.
4. Secure the flue turret on top of the boiler by inserting the
open ends of the turret clamp under the 2 studs and fixing
it in the middle with the single M5 x 10mm pozi-hex screw
provided.
5. Flues over 1 metre long.
Fix the flue support bracket to the wall, using the wall plug
and wood screw. For standard installations use the short
wood screw.
If the stand-off option is used, secure the support bracket
using the spacer bracket and long wood screw.
NB. The space bracket will utilise one fixing hole only whilst
used in conjunction with the stand-off option.
24
icos - Installation & Servicing
INSTALLATION
28
FITTING THE OPTIONAL ROOF FLUE KIT (Flat or Pitched)
Note.
A flat or pitched roof flashing plate (not supplied) is required before
proceeding with the installation of this kit.
This kit is suitable for both flat and pitched roof terminations, using a
concentric flue to run vertically from the top of the boiler and terminating
above roof level.
Connection to the top of the boiler is made using both a separately
supplied vertical connector and a 80/125 adaptor.
WEATHER PROOFING
Where the flue passes through the roof line an
adequate seal must be made. This is achieved
by using either:
-Flat roof weather collar
or
-Universal weather collar.
ACCESSORIES
Flue Duct Extension Kits are available for
flue lengths extending beyond 1m. These
packs contain 1m extension ducts and
may be cut to the desired length.
If the offset vertical option is used an elbow
Kit is required. For a full accessories list
refer to page 7, Optional Extras and Frame
31, Flue Arrangement.
nm8736
29
ROOF FLUE KIT CONTENTS / OPTIONS
Flue Terminal
UIN 203132
Flue
duct
support
icos - Installation & Servicing
Weather Collar - Flat Roof
UIN 152259
Weather Collar - Tile Roof
UIN 152258
Vertical connector
UIN 203135
o
elbow
45
UIN 203131
Roof Flue Extension Duct
UIN 203129
o
90
elbow
UIN 203130
nm8735
FLUE OUTLET
25
INSTALLATION
rf8394-1
690mm
Fixed
300mm
min
rf8393-1
300mm
min
300mm
min
625mm
Fixed
Flat roof - with structure
30
FLUE TERMINAL POSITION
The terminal should be positioned so that products of
combustion can safely disperse at all times.
Pluming may occur at the termination so, where
possible, terminal positions where this could cause
a nuisance should be avoided.
Minimum dimensions are shown below
rf8392
FLUE OUTLET
26
Terminal PositionMinimum Dimension
Directly below an opening,
air brick, windows, etc.300 mm
Below plastic / painted gutters300 mm
Painted surface300 mm
Below eaves or balcony500 mm
icos - Installation & Servicing
INSTALLATION
rf8737
rf8738
31
FLUE ARRANGEMENT
Note.
The equivalent flue length resistance of the elbow kits are:
o
90
elbow kit = 1m
45o elbow kit = 0.6m
icos - Installation & Servicing
FLUE OUTLET
27
INSTALLATION
nm8740
Flue Terminal
Pitched roof tile
weather collar
Flat roof tile
weather collar
1
nm8741
2
Extension
Duct
Vertical
connector
Turret
clamp
3
32
ASSEMBLING THE ROOF FLUE KIT
Determine the correct height that the flue should terminate
above the roof. If after calculating or measuring the overall flue
height from the top of the boiler, it is necessary to cut both
pipes of assembly A, then ensure they are cut equally leaving
the inner flue tube longer than the outer air tube as supplied.
Ensure the cut pipe ends are free from any burrs.
1. Position the roof flashing plate (supplied separately) over the
hole cut in the roof and insert flue terminal from the roof end.
MAX LENGTH:
7.5m
o
min 16
o
max 41
BOILER
2. Push fit the vertical connector (supplied seperately) into the
boiler flue connection and retain with the turret clamp and
securing screw (supplied with the boiler). ENSURING THE
GASKETS IN THE BOILER FLUE OUTLET ARE CORRECTLY
FITTED.
3. "Push" fit extension duct (if required (supplied separately)) into
vertical connector.
nm8739
FLUE OUTLET
nm8743
4
'X'
28
4. If the last extension duct requires cutting, measure ‘X’, the distance
(outer ducts), between the duct and the terminal and add 100 mm to
this dimension. This gives the length of the last extension duct.
Note. Check the position of the inner flue duct relative to the outer duct
on the assembled extension duct(s) and ensure the terminal flue duct
is cut longer than the air duct to ensure engagement in the final flue
duct seal.
5. Finally ensure the roof flashing plate is correctly sealed to the roof.
icos - Installation & Servicing
33
GAS CONNECTION
INSTALLATION
IMPORTANT. The gas service cock is sealed with a non-metallic
fibre washer seal so must not be overheated when making
capillary connections.
Refer to Frame 2 for details of the position of the gas connection.
For additional gas supply information refer to “Gas Supply”
on page 8.
34
BOILER WATER CONNECTIONS
The boiler flow and return pipes are supplied fitted to the
boiler and ready for top connection.
Note.
For heating loads in excess of 60 000 Btu/h use 28mm x
22mm connectors to connect the boiler flow and return
pipes to 28mm.
A boiler gas supply pipe length of 20m and not less than
15mm O.D. can be connected to the boiler via the gas
service cock union.
Ensure that the gas supply pipe does not foul the boiler
casing.
Refer to Frame 41 for details of the pressure test point
position.
INSTALLATION
TOP CONNECTION
Connect the system pipework to the boiler flow and return
pipes.
Note.
The front panel is not fitted at this stage.
35
ELECTRICAL CONNECTIONS
WARNING. This appliance MUST be earthed.
A mains supply of 230 V ~ 50 Hz is required.
All external controls and wiring MUST be suitable for mains
voltage.
The fuse rating should be 3 A.
Wiring external to the boiler MUST be in accordance with the
current I.E.E. (BS.7671) Wiring Regulations and any local
regulations.
Wiring should be 3 core PVC insulated cable NOT LESS
than 0.75 mm
For IE reference should be made to the current ETCI rules
for electrical installations.
Connection must be made in a way that allows complete
isolation of the electrical supply - such as a double pole
switch having a 3mm (
or a plug and socket serving only the boiler and system
controls. The means of isolation must be accessible to the
user after installation.
2
(24 x 0.2mm) and to BS. 6500, Table 16.
1/8") contact separation in both poles,
icos - Installation & Servicing
29
INSTALLATION
L3
L1
MainsConnector
(supplied inhardware pack)
Socket
(fixed to boiler)
Remove linkwhenconnectingexternal programmer.
Ecl2367
Ecl 1542
36
INTERNAL WIRING
A pictorial wiring diagram is shown in Frame 37.
The mains lead connector is pre-fitted. This must be
removed to allow wiring.
1. Route the mains cable into the bottom LHS rear of the casing.
If using the stand-off kit then route through the grommet.
2. Wire a permanent live supply into the 5-way remote plug
terminals L3, N and
IMPORTANT. A permanent live is ESSENTIAL in order for
the advanced diagnostic controls to function correctly.
3. Wire the switched live supply into L2 or connect L1 and L2
INSTALLATION
via external control switching, as shown in Frame 32. In
either case, remove the wire link fitted L1 to L2.
4. Secure the mains lead with the cable clamp.
5. Connect the mains lead connector. Ensure it is fully located.
Note.
Ensure that the lengths of the current carrying conductors are
shorter than the earth conductor so that if the cable slips in its
anchorage the current carrying conductors become taut
before the earth conductor.
.
30
Incoming mains wiring detail
icos - Installation & Servicing
Spark generator
nm 8076b
bk
b
br
bk
b
bk
r
b
v
b
r
br
b
r
r
b
r
r
r
or
or
or
or
b
pk
pk
y
y
y/g
y/g
Ferrite
y/g
y/g
y/g
y/g
y/g
bk
bk
Flue
thermistor
Overheat
thermostat
Flow
control
thermistor
Gas valve
ON /OFF
Switch
Service
connection
MAINS
SUPPLY
230V 50Hz
Permanent
black link
Fan
y
y
Chassis
earth y/g
Control PCB
Fused at
3.15ATL
bk
bk
y
y
User
control
and
display
br
b
g
e
C G
e
g
r
S
r
g
r
37
PICTORIAL WIRING DIAGRAM
LEGEND
b-blue
bk - black
br - brown
gy - grey
or - orange
pk - pink
r-red
v-violet
w-white
y-yellow
y/g - yellow/green
INSTALLATION
INSTALLATION
38
LEGEND
b-blue
FUNCTIONAL FLOW WIRING DIAGRAM
bk - black
Mains Switch
2
1
br - brown
gy - grey
or - orange
pk - pink
r-red
v-violet
w-white
y-yellow
y/g - yellow/green
icos - Installation & Servicing
DC
Fan
I
CH return thermistor
(not fitted)
nition electrod
Control thermistor
parkgenerato
Fluethermisto
r
br
r
pk
Flame detection
electrode
b
b
r
b
Control PCB
bk
y
b
y/g
y
y
User PCB
r
br
bk
External switch e.g.
room'stat, pro
or
or
v
D
k
nm 7201
ramme
Overheat
thermostat
as valv
N
y/
31
39
EXTERNAL ELECTRICAL CONTROLS
Wiring external to the boiler MUST be in
accordance with the current I.E.E. (BS.7671)
Wiring Regulations and any local regulations.
For IE reference should be made to the current
ETCI rules for electrical installations.
The fuse should be 3A.
Room Thermostat
If the thermostat has a neutral connection use it.
(It provides for more energy efficient operation by
reducing switching temperature differentials.)
INSTALLATION
Frost Protection
If parts of the pipework run outside the house or if
the boiler will be left off for more than a day or so
then a frost thermostat should be wired into the
system. This is usually done at the programmer, in
which case the programmer selector switches are
set to OFF and all other controls MUST be left in
the running position.
The frost thermostat should be sited in a cold place
but where it can sense heat from the system.
If the boiler is installed in a garage it may be
necessary to fit a pipe thermostat, preferably on
the return pipework.
Important. Ensure that the frost thermostat is
wired so that the system pump and/or external
diverter valve is energised, as appropriate.
INSTALLATION
Designation of the terminals will vary but the
programmer and thermostat manufacturers'
leaflets will give full details.
Diagram A shows an application to boilers fitted
with a room thermostat only.
Diagrams B and C show applications to boilers
fitted with alternative time controls.
Earths are not shown for clarity but MUST NEVER BE OMITTED.
40
COMMISSIONING AND TESTING
A. ELECTRICAL INSTALLATION
1. Checks to ensure electrical safety should be carried out by
a competent person.
2. ALWAYS carry out the preliminary electrical system checks,
i.e. earth continuity, polarity, resistance to earth and short
circuit, using a suitable test meter.
B. GAS INSTALLATION
1. The whole of the gas installation, including the meter,
should be inspected and tested for tightness and purged
in accordance with the recommendations of BS. 6891.
In IE refer to I.S. 813:2002.
2. Purge air from the gas installation by the approved methods
only.
WARNING
installation, open all windows and doors, extinguish naked lights and DO NOT SMOKE.
. Whilst effecting the required gas tightness test and purging air from the gas
32
icos - Installation & Servicing
INSTALLATION
41
INITIAL LIGHTING
1. Check that the system has been filled and that the boiler is not air locked.
Note.
It is important the burner is not operated before the system is fully
vented of air. If it is necessary to operate the appliance pump to
assist venting of the air this must be done with the gas service cock
turned off.
2. Check that all drain cocks are closed and any valves in the flow
and return are open.
3. Check the electrical supply is off.
4. Ensure the boiler sealing panel is fitted.
5. Check the gas service cock is open.
6. Check that the boiler on/off switch (A) is OFF
7. Slacken the screw in the inlet pressure test point (G) and
connect a gas pressure gauge via a flexible tube.
8. Switch the electricity supply ON and check all external controls
are calling for heat.
9. Set the boiler thermostat knob (B) to position 6 and switch the
boiler on/off switch (A) to ON. The boiler control should now go
through its ignition sequence until the burner is established.
10. If the boiler does not light after 3 attempts the fault codes
will be displayed. Press the reset button (E); the boiler will
then repeat its ignition sequence. When the burner is
established the WHITE burner ON neon (D) will be
permanently illuminated
11. Ensure that with the boiler operating the dynamic gas
pressure is able to obtain maximum output. Refer to Table 2.
For additional gas supply information refer to “Gas
Supply” on page 8.
IMPORTANT.
The gas input to the burner is regulated by the gas
valve according to the air flow produced by the fan.
It is NOT user-adjustable. Any interference to
sealed settings on the gas valve will adversely
affect operation and render our warranty void.
12. Switch OFF the boiler on/off switch.
13. Remove the pressure gauge and tube. Tighten the
sealing screw in pressure test point. Ensure a gas
tight seal is made.
14. Refit the boiler front panel and bottom panel.
15 . THE FASCIA
a. To remove the plastic fascia, prise off the
retaining star washers using a pair of pliers and
place to one side.
b. Fill the remaining fixing holes with the white push
in caps provided.
L' 'F'
LEGEND
A On/Off switch.
B Thermostat knob.
D 'Burner On' neon.
E Reset button.
F Injector pressure test point.
G Inlet pressure test point.
THE DISPLAY
The user control has one neon and one display to inform the
user about the status: the display will show the status of the
boiler and the neon will show the status of the flame. If no
flame is detected the neon is blinking. When the flame is
detected the neon will be lit permanently.
Below is a list with display function in normal operation.
Standby. No demand for heat present.
Boiler is active for central heating.
INSTALLATION
nm9474
H Gas service cock.
J Casing pressure test point.
K Overheat thermostat.
L Flue thermistor.
M Flow thermistor.
Z Spark generator.
icos - Installation & Servicing
Boiler is in lockout for a specific error. The display will be
blinking, alternating with a number or letter to show which
error is detected.
Boiler is in lockout for a specific error. The display will be
blinking, alternating with a number or letter to show which
error is detected.
Boiler frost protection
Note: Boiler frost protection occurs at a temperature less
than 3 degrees. The boiler will fire.
33
42
GENERAL CHECKS
INSTALLATION
Make the following checks for correct operation:
1. Central Heating
The correct operation of ANY programmer and all
other system controls should be proved. Operate
each control separately and check that the main
burner or circulating pump, as the case may be,
responds.
Ensure the external controls are calling for heat.
After ignition the display should read:
INSTALLATION
2. Gas Rate
Operate the boiler for 10 minutes. Check the boiler
gas rate (see Table 2), ensuring the boiler is at full
output whilst measurements are recorded.
3. Water Circulation System
Knob SettingFlow Temperature
Min3086
Max8 21 80
o
C
o
F
• The temperatures quoted alongside are approximate, and
vary between installations.
Note. Fernox Superfloc, Sentinel X300 (new systems) or
X400 (existing systems) flushing solutions should be
used during the flushing procedure. Refer to Frame 9.
a. With the system HOT examine all water connections for
soundness.
b. With the system still HOT, turn off the gas, water and
electricity supplies to the boiler and drain down to
complete the flushing process.
c. Refill and vent the system, add inhibitor (see Frame 9),
clear all air locks and again check for water soundness.
Adhere the water treatment warning label, supplied in
the hardware pack, in a prominent position on the
system, to prevent the use of incorrect water treatment
additives.
d. Balance the system. Refer to Frame 4.
4. Check the condensate drain for leaks and check that it is
discharging correctly
5. Finally set the controls to the user’s requirements.
43
HANDING OVER
After completing the installation and commissioning of the system the installer should hand over to the householder
by the following actions:
1. Hand the User's Instructions to the householder and
explain his or her responsibilities under current Gas
Safety (Installation and Use) Regulations or rules in force.
2. Explain and demonstrate the lighting and shutting down
procedures.
3. The operation of the boiler and the use and adjustment of
ALL system controls should be fully explained to the
householder to ensure the greatest possible fuel
economy consistent with household requirements of both
heating and hot water consumption.
Advise the User of the precautions necessary to prevent
damage to the system and to the building in the event of
the system remaining inoperative during frosty conditions.
4. Explain the function and the use of the boiler heating
controls.
5. Explain the function of the boiler fault mode.
Emphasise that if a fault is indicated the boiler should be
turned off and a Gas Safe Registered Engineer consulted.
In IE contact a Registered Gas Installer (RGII).
6. Explain and demonstrate the function of time and
temperature controls, radiator valves, etc., for the
economic use of the system.
7. If any programmer is fitted then draw attention to the
Programmer User’s Instructions and hand them to the
householder.
8.
After installation and commissioning please complete
the Benchmark Commissioning Checklist before
handover to the customer.
For IE, it is necessary to complete a “Declaration of
Conformity” to indicate compliance to I.S. 813:2002.
9. Stress the importance of regular servicing by a Gas
Safe Registered Engineer and that a comprehensive
service should be carried out AT LEAST ONCE A YEAR.
In IE, servicing work must be carried out by a
Registered Gas Installer (RGII).
10. As the installer you may wish to undertake the service
contract yourself or alternatively offer to the customer
the benefits of the Ideal Care Scheme, details of which
are outlined in the household pack supplied with this
boiler.
34
icos - Installation & Servicing
SERVICING
44
SERVICING SCHEDULE
For the very latest copy of literature for specification and maintenance practices visit our website www.idealboilers.com,
where you will be able to download relevant information. N.B. Technical Bulletins are also available on our website.
WARNING. Always turn OFF the gas supply at the gas service cock, and switch OFF and disconnect the electricity
supply to the appliance before servicing.
To ensure the continued safe and efficient operation of the
appliance it is recommended that it is checked at regular
intervals and serviced as necessary. The frequency of
servicing will depend upon the installation condition and
usage but should be carried out at least annually.
It is the law that any service work must be carried out by a
Gas Safe Registered Engineer. In IE service work must be
carried out by a Registered Gas Installer (RGII).
1. Light the boiler and carry out a pre-service check, noting
any operational faults.
2. Clean the main burner.
3. Clean the heat exchanger & ‘S’ trap.
4. Check the condition of the combustion chamber insulation.
Any cracked, damaged or displaced pieces should be
replaced.
Ionisation probes are a serviceable component and require
annual inspection and replacement if distorted.
5. Check the main injector for blockage or damage.
6. Wherever possible remove and clean the condensate ‘S’
trap (refer to Frame 44) and check the drain for blockage.
7. Check that the flue terminal is unobstructed and that the
flue system is sealed correctly.
The servicing procedures are covered more fully in Frames
44-51 and MUST be carried out in sequence.
Note. In order to carry out either servicing or replacement of
components the boiler front panel and sealing panel
must be removed. Refer to Frames 45 and 46.
IMPORTANT.
8. After completing the servicing or exchange of components
always test for gas tightness.
9. When work is complete the sealing panel MUST be
correctly refitted, ensuring that a good seal is made.
Do NOT OPERATE the boiler if the sealing
panel is not fitted.
10. If, for any reason, the condensate ‘S’ trap has been
removed ensure the trap is refilled with water before
reassembling.
11. Check the gas consumption.
12. Connect a suitable gas analyser to the sampling point on
the top of the boiler (refer to Frame 45) or into the flue
terminal if access is possible (optional test).
For correct boiler operation, the CO/CO
gas should not be greater than 0.004 ratio.
13. Complete the service section in the Benchmark
Commissioning Checklist.
content of the flue
2
45
BOILER FRONT PANEL REMOVAL
1. Remove the 2 screws from the underside of the
appliance.
2. Pull the front panel forward at the bottom and lift
to disengage it from the top lugs.
nm7808
46
BOILER SEALING PANEL/
BOTTOM PANEL REMOVAL
1. To remove the sealing panel remove the 4 screws.
2. Remove the panel.
3. To remove the bottom panel remove the 2 screws.
4. Pull the RH side of the panel down. Slide it to the right
and withdraw.
SERVICING
icos - Installation & Servicing
35
SERVICING
47
FAN AND VENTURI ASSEMBLY REMOVAL AND CLEANING
1. Disconnect the electrical leads from
the fan.
2. Undo the gas pipe union connection to
the injector housing.
3. Undo the screw on the fan mounting
bracket.
4. Lift off the fan and venturi assembly.
5. Inspect the injector for blockage or
damage.
3
4
1
2
48
BURNER REMOVAL AND CLEANING
SERVICING
1. Remove the 6 screws securing the
burner (the 3 screws at the rear are
extended to ease access).
2. Lift off the burner from the combustion
chamber.
IMPORTANT
The burner head is a ceramic plaque
construction. Care must be taken to
ensure that the burner is not placeddown upon its face as this may cause
damage to the ceramic.
3. Brush off any deposits that may be on
the ceramic with a SOFT brush.
4. Inspect the sealing gasket around the
burner and combustion chamber
insulation for any signs of damage.
Replace as necessary.
Ecl 6073
1
2
4
Ionisation
Probes
Note.
Take care not to disturb the ionisation
probes at the front and rear of the
combustion chamber.
36
nm7400
icos - Installation & Servicing
SERVICING
nm7401
2
Sump cover
3
Ionisation
probes
Heat exchanger
49
CLEANING THE CONDENSATE 'S' TRAP
1. Undo the plastic union nut on
the condensate ‘S’ trap outlet.
2. Remove the 2 screws.
3. Pull the trap down and forward
to remove.
4. Flush out any deposits with
clean water.
50
CLEANING THE HEAT EXCHANGER
1. Remove ignition and flame detection electrodes.
Refer to Frames 56 & 57.
2. Remove the 3 screws retaining the sump cover and
remove.
3. Using a suitable tool as supplied in the standard
British Gas Flue brush kit, clean between the heat
exchanger fins from the top of the heat exchanger.
4. Access to the base of the heat exchanger is now
possible. Brush clean any deposits from the base of
the heat exchanger and remove any loose deposits
from the sump.
5. Inspect the ignition and detection electrodes. Ensure
that they are clean and in good condition - replace if
necessary.
6. Check the condition of the combustion chamber
insulation. Any cracked or damaged pieces must be
replaced.
Note. Take care not to disturb the ionisation probes at the
front and rear of the combustion chamber.
7. Check that the ignition and detection gaps are
correct. Refer to Frames 56 & 57.
SERVICING
51
REASSEMBLY
Reassemble the boiler in the following order.
1. Refit the condensate ‘S’ trap, ensuring that it is full of water.
2. Refit the sump cover plate.
3. Refit the electrodes (check dimensions Frames 56 & 57).
4. Refit the burner.
5. Refit the fan / venturi assembly.
icos - Installation & Servicing
6. Reconnect the fan electrical leads.
7. Refit the boiler sealing panel.
IMPORTANT.
Ensure the boiler sealing panel is correctly fitted and
that a good seal is made.
8. Refit the boiler front and bottom panels.
9. Turn on the gas supply at the gas service cock.
10. Reconnect the electrical supply.
37
SERVICING
nm9476
52
REPLACEMENT OF COMPONENTS
GENERAL
When replacing ANY component:
1. Isolate the electricity supply.
2. Turn off the gas supply.
3. Remove the boiler front panel. Refer to Frame 40.
After replacing ANY component check operation of the boiler
including gas soundness, gas rate and combustion test.
THE BOILER MUST NOT BE OPERATED WITHOUT THE SEALING PANEL FITTED
IMPORTANT
When work is complete, the sealing panel must be
correctly fitted, ensuring that a good seal is made.
Note.
In order to assist fault finding, the control panel has an
LED diagnostic display. The key to boiler fault
conditions is shown in Frame 69.
53
CONTROL THERMISTOR REPLACEMENT
1. Refer to Frame 52.
2. Remove the boiler front and sealing panels. Refer
to Frames 45 & 46.
3. Pull the electrical leads off the control thermistor.
4. Pull the control thermistor and spring clip off the
SERVICING
flow pipe.
5. Replace thermistor and
reconnect leads, ensuring that
the spring clip is securely
holding the thermistor to the
flow pipe.
6. Reassemble the boiler in
reverse order.
7. Check the operation of the
boiler. Refer to Frame 52.
38
icos - Installation & Servicing
54
nm7402
Ionisation
Probes
4
5
6
FAN REPLACEMENT
SERVICING
1. Refer to Frame 52.
2. Remove the boiler front and sealing
panels. Refer to Frames 45 & 46.
3. Disconnect the electrical leads from
the fan.
4. Unscrew the gas pipe union
connection to the injector housing.
5. Unscrew and remove the screw
retaining the fan mounting bracket.
6. Remove the fan and venturi assembly.
7. Remove the 3 screws and remove the
venturi assembly, noting the
orientation of the venturi in relation to
the fan body.
8. Transfer the venturi assembly to the
new fan, replacing the gasket if
evidence of damage or deterioration
is visible.
9. Fit the new fan / venturi assembly.
10. Reassemble the boiler in reverse
order, taking care not to overtighten
the screw on the fan mounting
bracket.
11. Check the operation of the boiler.
Refer to Frame 52.
Orifice plate
Gasket
7
3
5
Ecl 2336
4
55
BURNER REPLACEMENT
1. Refer to Frame 52.
2. Remove the boiler front and sealing panels.
Refer to Frames 45 & 46.
3. Remove the fan assembly. Refer to Frame 49.
4. Remove the 6 screws securing the burner (the
3 screws at the rear are extended to ease
access).
5. Lift off the burner from the combustion
chamber.
6. Fit the new burner, replacing any damaged or
deteriorating sealing gasket.
7. Reassemble in reverse order.
8. Check the operation of the boiler. Refer to
Frame 52.
Note. Take care not to disturb the ionisation
probes at the front and rear of the
combustion chamber.
SERVICING
icos - Installation & Servicing
39
56
IGNITION ELECTRODE REPLACEMENT
1. Refer to Frame 52.
2. Remove the boiler front and sealing panels. Refer
to Frames 45 & 46.
3. Unplug the ignition lead from the electrode.
4. Remove the earth lead from the ignition electrode.
5. Remove the remaining screw holding the ignition
electrode to the combustion chamber.
6. Remove the electrode.
5
SERVICING
4
ispfu9788
7. Fit the new ignition electrode, using the
new gasket supplied. Check dimensions
as shown.
8. Reassemble in reverse order and check
that no damage to the combustion
chamber insulation has occurred during
the electrode replacement.
9. Check operation of the boiler. Refer to
Frame 52.
57
FLAME DETECTION ELECTRODE REPLACEMENT
1. Refer to Frame 52.
2. Remove the boiler front, bottom & sealing panels.
SERVICING
Refer to Frames 45 & 46.
3. Unplug the flame detection lead from the electrode.
4. Remove the 2 screws holding the flame detection
electrode to the combustion chamber.
ispfu9801
5. Remove the flame detection electrode.
6. Fit the new flame detection electrode, using the
new gasket supplied. Check dimension as
shown.
7. Reassemble in reverse order and check that no
damage to the combustion chamber insulation
has occurred during the electrode replacement.
8. Check operation of the boiler. Refer to Frame 52.
40
icos - Installation & Servicing
SERVICING
Ecl 2340
Copper washer
4
Rubber moulded seal
58
SPARK GENERATOR REPLACEMENT
1. Refer to Frame 57.
2. Disconnect the leads from the spark generator.
3. Remove the M4 screws securing the spark generator to
the boiler chassis.
4. Fit the new spark generator and re-assemble in reverse
order.
5. Check operation of the boiler. Refer to Frames 45 & 46.
59
BURNER INJECTOR REPLACEMENT
1. Refer to Frame 52.
2. Remove the boiler front and sealing panels. Refer to
Frames 45 & 46.
3. Remove the fan / venturi assembly. Refer to Frame 54.
4. Remove the 2 injector housing screws.
6. Withdraw the injector housing.
7. Fit the new injector housing, complete with injector.
8. Reassemble in reverse order, ensuring that the new
gas seal supplied is located correctly in the injector
housing.
9. Check operation of the boiler. Refer to Frame 52.
60
GAS CONTROL VALVE REPLACEMENT
1. Refer to Frame 52.
2. Remove the boiler front, bottom and sealing panels. Refer
to Frames 45 & 46.
3. Unplug the electrical lead from the gas control valve and
disconnect the earth wire.
4. Remove the sensing tube from the gas control valve.
5. Undo the union nut between the gas valve and the gas
inlet cock.
6. Undo the union nut on the outlet side of the gas
control valve.
7. Undo the gas valve bracket screw, slide the
gas valve forward and remove.
8. Transfer the mounting bracket and gas inlet
pipe to the new gas control valve.
9. Fit new gas control valve, ensuring that any
seals showing damage or deterioration are
replaced.
10. Reassemble in reverse order.
11. Ensure the sensing tubing is correctly replaced and
not kinked or blocked in any way.
12. Check operation of the boiler. Refer to Frame 52.
5
Ecl 2343
SERVICING
4
icos - Installation & Servicing
41
SERVICING
Ecl 2419
Mounting brackets
Control box
11
61
CONTROL BOX REPLACEMENT
1. Refer to Frame 52.
2. Remove the front panel.
3. Remove the bottom panel.
4. Remove the 2 control box screws.
5. Carefully unplug all the electrical wiring from the control box.
6. With the control box lowered, pull the assembly forward to
remove from the housing.
7. Remove the user control from the assembly.
8. Transfer the mounting brackets to the new control box.
9. Reassemble in reverse order, ensuring that the control box is
located correctly in the housing before reconnecting the
electrical wiring.
10. Check operation of the boiler. Refer to Frame 52.
N.B. To change the user control only.
11. Loosen the screw on the underside of the user control.
12. Pull the display unit forward to remove.
13. Push the new display unit into position.
14. Reassemble in reverse order.
15. Check the operation of the boiler. Refer to Frame 52.
nm7804
4
Ecl 2438
SERVICING
62
1. Refer to Frame 52.
2. Remove the boiler front and bottom panel.
Refer to Frames 45 & 46.
3. Remove the 2 control box screws and lower
the control box.
4. Push out the mains switch from the rear, as
shown.
5. Refit the new switch, ensuring that the
electrical leads are replaced on the correct
terminals (refer to Frame 38) and the key
on the switch is correctly aligned with the
slot in the plastic moulding.
6. Reassemble in reverse order.
7. Check operation of the boiler. Refer to
Frame 52.
MAINS SWITCH REPLACEMENT
42
icos - Installation & Servicing
63
OVERHEAT THERMOSTAT REPLACEMENT
1. Refer to Frame 52.
2. Remove the boiler front and
sealing panels. Refer to Frames
45 & 46.
3. Pull off the electrical leads from
the thermostat body.
4. Pull the thermostat and clip from
the pipe.
5. Fit the new thermostat, ensuring
that the clip is securely holding
the thermostat to the flow pipe.
6. Reassemble in reverse order.
7. Check operation of the boiler.
Refer to Frame 52.
SERVICING
64
FLUE THERMISTOR REPLACEMENT
1. Refer to Frame 52.
2. Remove the boiler front and sealing panels. Refer to Frames 45 & 46.
3. Pull off the silicon tube from the thermistor housing.
4. Remove the aluminium nipple securing the thermistor to the flue manifold.
5. Withdraw the thermistor.
6. Unplug the inline electrical connector.
7. Fit the new thermistor, using the gasket supplied.
8. Reassemble in reverse order.
9. Check operation of the boiler. Refer to Frame 52.
3
4
nm9478
SERVICING
icos - Installation & Servicing
nm9479
43
SERVICING
1
68
COMBUSTION CHAMBER INSULATION REPLACEMENT
Ideal Stelrad Group recommends that, for your own comfort
and safety and to comply with good working practice, the
procedure described below is followed:
1. Refer to 'Replacement of Components' Frame.
2. Remove the boiler front and sealing panels. Refer to
'Boiler Front Panel Removal' and 'Boiler Sealing Panel
Removal' Frame.
3. Remove the fan / venturi assembly. Refer to 'Fan and
Venturi Assembly removal and cleaning' Frame.
4. Remove the burner. Refer to 'Burner removal and
cleaning' Frame.
5. Remove the ignition electrode. Refer to 'Ignition Electrode
replacement' Frame.
6. Remove the flame detection electrode. Refer to 'Flame
Detection electrode replacement' Frame.
7. Remove the front and rear ionisation probes and discard.
Prior to removal of the insulation piece the following
protective equipment should be worn:
- Face mask supplied with the spare part.
- Gloves supplied with the spare part.
8. Damp down the combustion chamber area containing
the insulation piece.
9. Remove the insulation piece. The replacement one piece
insulation is supplied in a plastic bag, this bag should be
retained and the discarded insulation should now be
placed into it.
10. Sweep any dampened particles and place in the plastic
bag.
11. Fit new insulation piece -
(a) Locate and align the insulation with the electrode
holes and position the insulation into the combustion
chamber.
(b) Push the flexible material into the corners of the
combustion chamber ensuring it is flat and flush
against the combustion chamber wall.
(c) Interlock the insulation piece along the back wall of
the combustion chamber.
(d) Again push the flexible material into the corners of the
combustion chamber ensuring it is flat and flush
against the combustion chamber wall.
(e) Secure the insulation by replacing the ionisation
probes with those supplied in the kit. Note that
ionisation probes are a serviceable component and
require inspecting annually.
Note. The insulation is designed to be interlocking and
should be fitted as shown.
12. Remove the gloves and face mask and place them in the
plastic bag.
13. Wash your hands and any areas of skin which may have
come into contact with any of the particles from the
insulation piece.
Note. Seal the plastic bag and dispose of it and its contents
into a commercial tip.
14. Reassemble in reverse order.
15. Check operation of the boiler. Refer to 'General Checks'
Frames.
SERVICING
7
9
Insulation
Combustion
chamber
6
5
isfu9570
44
icos - Installation & Servicing
66
nm9480
13
18
19
15
HEAT EXCHANGER REPLACEMENT
SERVICING
Refer also to Frame 10, 'Boiler exploded view'.
1. Refer to Frame 52.
2. Remove front, bottom and sealing panels. Refer to
Frames 45 & 46.
3. Remove the control box and place to one side. Refer to
Frame 61.
4. Attach a length of hose to the drain nipple on the bottom
of the heat exchanger and drain down the boiler.
5. Remove the fan assembly and place to one side. Refer
to Frame 54.
6. Remove the burner and place to one side. Refer to
Frame 48.
7. Remove the ignition and detection electrodes. Refer to
Frames 56 & 57.
8. Remove the spark generator. Refer to Frame 58.
9. Release the flue from the turret.
10. Remove the turret from the boiler. Refer to Frame 15.
11. Release the silicon tubing from the sample point.
12. Release the electrical connections to the flue
thermistor.
13. Unscrew the M5 x 10 screw retaining the top manifold
flue casing.
14. Remove the top half of the flue manifold from the
appliance.
15. Undo the 4 M5 x 10 screws securing the bottom flue
manifold casting.
16. Pull the CH return pipe, CH flow pipe and the bottom
flue manifold together up and out of the heat
exchanger.
17. Remove the condensate 'S' trap. Refer to Frame 49.
18. Unscrew the 2 M5 x 10 screws from the inter panel.
19. Slide the heat exchanger and inter panel assembly
upwards to disengage and remove from the casing.
20. Transfer the interpanel to the new heat exchanger.
21. Reassemble in reverse order, replacing gaskets or
seals if any sign of damage or deterioration is evident.
Note.
The heat exchanger is supplied with new combustion
chamber insulation boards. These should be fitted
(refer to Frame 65) before the burner and fan assembly
and before the ignition and detection electrodes are
replaced.
25. Check the operation of the boiler. Refer to Frame 52.
SERVICING
icos - Installation & Servicing
45
SERVICING
67
BOILER SEALING PANEL SEAL REPLACEMENT
1. Refer Frame 52.
2. Remove the front panel. Refer to Frame 45.
3. Remove the boiler sealing panel. Refer to
Frame 46.
4. Remove the old seal from the casing and
thoroughly clean the casing surfaces.
5. Fit the new adhesive seals - note that they
are supplied to the correct length for the
relevant sides.
6. Reassemble in reverse order.
Note.
Ensure that the boiler sealing panel is
correctly seated, compressing the seal to
make an airtight joint.
7. Check operation of boiler. Refer to
Frame 52.
3
68
CONDENSATE 'S' TRAP REPLACEMENT
1. Refer to Frame 52.
SERVICING
2. Remove the boiler front panel. Refer to Frame 45.
3. Remove the boiler bottom panel. Refer to Frame 46.
4. Undo the plastic union nut on the condensate 'S' trap
outlet.
5
Seals
5. Remove the 2 screws.
6. Pull the trap down and forward to remove.
7. Reassemble in reverse order, ensuring that the new
trap is full of water.
8. Check operation of the boiler. Refer to Frame 52.
nm9481
4
46
3
2
nm 2902
icos - Installation & Servicing
FAULT FINDING
69
FAULT FINDING CHART MAIN MENU
In order to assist fault finding the boiler has an LED diagnostic display. The key to the display codes is as follows:
Check the ignition electrode and associated harness for:
Is gas pressure available at
the boiler inlet ?
YES
Is 200V DC supply available
at the gas valve ?
YES
Check spark generator and associated
correctly?
YES
continuity, visual condition, position
(Refer to Frame 56).
Are these functioning correctly ?
NO
Replace gas valve
NO
NO
YES
NO
Check gas supply
and rectify fault
Check gas valve
wiring for
continuity
Replace PCB
Replace
spark generator
Check syphon
and condensate
drain pipework
for blockage
Note. Due to the wave form of the rectified voltage the reading will vary, depending on the type of meter used to
measure the value (some may measure the possible peak voltage of 339V). In general terms, a reading greater
than 150V indicates that the correct voltage is supplied to the gas valve. As an alternative to a multimeter a
mains checking device may be used. E.g. an electrical screwdriver or a mains tester.
Check earth connection to the boiler. If value is still in
excess of 50V consult a Qualified Electrician to check the
household electrical supply and circuitry
NO
Press and hold reset button for 2
seconds. Does boiler operate
Correct wiring or replace thermostat
Correct wiring or replace detection lead
Correct connections
YES
correctly?
NO
Turn boiler off and wait for 5
seconds.Turn boiler on.
Does boiler operate correctly?
NO
Replace PCB
YES
OK
OK
48
icos - Installation & Servicing
72
L.......A........(OVERHEAT ERROR)
FAULT FINDING
Can the overheat condition be reset by pressing
the boiler reset button when the system is cold ?
YES
Is the boiler and CH system filled with
water and all isolation valves open ?
YES
Does the pump setting give a differential
across the boiler in excess of 25 oC ?
YES
Increase the pump setting.
Is differential now below 25
NO
Replace the system pump
73
L....8..... (FAN ERROR)
Is nominal 330 V DC present across
red and blue at the fan connector as
reset button is pressed?
NO
Check wiring harness for continuity. Is there continuity?
o
YES
C ?
NO
NO
NO
YES
OK
Is 14V DC present
across yellow and pink
at the fan connector?
Note.
With V9 Primary Control PCB, overheat LA/HA or H9/L9 when
reset will display 3 horizontal lines and will not attempt to refire
until the temperature in the heat exchanger drops below 50oC.
NO
Replace overheat thermostat
Fill and vent the system and open all
isolation valves
Set CH control knob to maximum.
If the overheat trips again measure the flow temp:
Over 90oC Check control thermistor
(Refer to Frame 71) .
o
Under 90
YES
YES
NO
C Replace overheat 'stat
Replace fan
Replace PCB
Replace harness
74
H.....1.....(FLOW THERMISTOR ERROR)
Remove the boiler flow thermistor from the CH flow
With V9 Primary Control PCB, overheat LA/HA or H9/L9 when
reset will display 3 horizontal lines and will not attempt to refire
until the temperature in the heat exchanger drops below 50
Check wiring to the boiler for
reversed live and neutral
Are thermistor values correct ?
NO
Replace
thermistor
icos - Installation & Servicing
o
C.
SHORT LIST OF PARTS
The following are parts commonly required due to damage or
expendability. Their failure or absence is likely to affect safety or
performance of this appliance.
The list is extracted from the British Gas List of Parts, which
contains all available spare parts.
The full list is held by British Gas Services, Ideal Stelrad Group
distributors and merchants.
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 Boilers Limited.
Key No.GC Part No.DescriptionQty.Product No.
1Front casing panel1173 508
4E67-482Bottom casing panel1170 900
11E67-489Burner1170 905
12Combustion chamber insulation1173 520
14E67-492Injector and housingHE15, HE18, HE241170 908
H18-545Injector and housingHE121173 779
16E85-097Fan assembly1172 625
When ordering spares please quote:
1. Boiler Model
2. Appliance G.C. Number
3. Description
4. Quantity
5. Product Number
19E67-497Gas control valve1170 913
22E67-500Flue thermistor1170 916
23E67-501Control thermistor2170 917
24E67-502Overheat thermostat1170 918
25Ignition electrode kit1175 406
26Flame detection electrode and gasket1173 529
32E67-511Condensate ‘S’ trap1170 926
34E65-515Controls hinge bracket kit1170 928
35User controls1173 532
36PCB primary controls kit (V9)1174 486
37E67-519Fuse PCB (3.15A L 250V)1170 931
39Main switch c/w harness1173 537
45E65-527Gasket kit1170 938
52E68-376Seal kit - sealing panel1171 014
53E68-380Turret gasket1171 022
40Spark generator1173 538
94Ignition lead1175 424
95Detection lead1173 511
icos - Installation & Servicing
51
nm8077d
78
SHORT LIST
SHORT LIST OF PARTS
79
BOILER CASING ASSEMBLY
1. Front casing panel with screws.
2. Sealing panel with screws.
4. Bottom casing panel with screws.
52
icos - Installation & Servicing
80
CONTROLS ASSEMBLY
33. Controls assy with screws.
34. Controls hinge bracket.
35. User controls (without item 38).
36. PCB (primary controls).
38. User control housing
39. Mains switch.
54. Jumper link.
LIST OF PARTS
81
BURNER ASSEMBLY
11. Burner assembly with screws
and gasket.
icos - Installation & Servicing
Ecl 1598
53
NOTES
54
icos - Installation & Servicing
NOTES
icos - Installation & Servicing
55
INSTALLER NOTIFICATION GUIDELINES
A change to Building Regulations (England and Wales) requires the installer to notify
when installing a heating appliance, as from 1st April 2005.
Competent Person's
SELF CERTIFICATION SCHEME
BUILDING CONTROL
Install and commission
this appliance to
manufacturers' instructions
Complete the
Benchmark Checklist
Choose
Buildings Regulations
notification route
Contact your relevant
Local Authority
Building Control (LABC) who
will arrange an inspection
or contact a government
approved inspector
LABC will record the data
and will issue a
certificate of compliance
If you notify via
Gas Safe Register they will
then notify the relevant
Local Authority Building
Control (LABC) scheme
on members behalf
Gas Safe Register Engineers
log on to the engineers section
of the website at
www.gassaferegister.co.uk
or telephone
0800 408 5577
You must ensure that the
notification number issued by
Gas Safe Register is written
onto the Benchmark Checklist
Gas Safe Register will record the
data and will send a certificate
of compliance to the property
IT IS A CONDITION OF THE
MANUFACTURERS WARRANTY
THAT THE BENCHMARK
COMMISSIONING CHECKLIST IS
FULLY COMPLETED AND LEFT
WITH THE APPLIANCE
icos - Installation & Servicing
57
Gas Safe Register ID N
Gas Safe Register ID N
Gas Safe Register ID N
Gas Safe Register ID N
Gas Safe Register ID N
Gas Safe Register ID Number
Gas Safe Register ID NumberGas Safe Register ID Number
Gas Safe Register ID Number
Gas Safe Register ID Number
Gas Safe Register ID Number
Gas Safe Register ID Number
Gas Safe Register ID Number
Gas Safe Register ID Number
Gas Safe Register ID Number
Gas Safe Register ID Number
use
icos
Your Ideal us
When replacing any part on assured conform to the safetyuse reconditioned or copy pa
HE12,
For installatio
The code of practice for the installation,
commissioning & servicing of central heating systems
Ideal Stelrad Group pursues a policy of continuing
improvement in the design and performance of its products. The
right is therefore reserved to vary specification without notice.
P.O. Box 103, National Ave, Kingston upon Hull,
Technical Training
The Ideal Boilers Technical Training Centre offers a series
of first class training courses for domestic, commercial and
industrial heating installers, engineers and system
specifiers.
For details of courses please ring: ............. 01482 498 432
CERTIFIED PRODUCT
Manufactured under a BS EN ISO 9001:
2000 Quality System accepted by BSI
I
deal Installer/Technical Helpline: 01482 498 663
www.idealboilers.com
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