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icos system -

User's

Introduction

The icos system is a wall mounted, room sealed, condensing
boiler, featuring full sequence automatic spark ignition and fan
assisted combustion.
Due to the high efficiency of the boiler, condensate is produced
from the flue gases and this is drained to a suitable disposal
point through the plastic waste pipe at the lower rear of the
boiler. A condensate 'plume' will also be visible at the flue
terminal.

Safety

Current Gas Safety (Installation & Use)
Regulations or rules in force.

In your own interest, and that of safety, it is the law that this boiler
must be installed by a CORGI registered installer.
In IE the installation must be carried out by a competent person
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.

It is essential that the instructions in this
booklet are strictly followed, for safe and
economical operation of the boiler.

Electricity Supply

This appliance must be earthed.
Supply: 230 V ~ 50 Hz. The fusing should be 3A.
Connection must be made in a way that allows complete
isolation of the electrical supply such as a double-pole switch,
having a 3mm (1/8") contact separation in both poles, serving
only the boiler and system controls. Alternatively, a 3-pin
UNSWITCHED socket may be used. The means of isolation
must be accessible to the user after installation.

Important Notes

This appliance must not be operated without the casing
correctly fitted and forming an adequate seal.
If the boiler is installed in a compartment then the
compartment MUST NOT be used for storage purposes.
If it is known or suspected that a fault exists on the boiler
then it MUST NOT BE USED until the fault has been
corrected by a CORGI registered installer or in IE a
competent person.
Under NO circumstances should any of the sealed
components on this appliance be used incorrectly or
tampered with.
This appliance is not intended for use by persons (including
chilcren) with reduced physical, sensory or mental
capabilities, or lack of experience and knowledge, unless
they have been given supervision or instructions concerning
use of the appliance by a person responsible for their safety.

Children should be supervised to ensure that they do not
play with the appliance.

In cases of repeated or continuous shutdown a CORGI
registered installer or in IE a competent person should be called
to investigate and rectify the condition causing this and carry out
an operational test . Only the manufacturers original parts
should be used for replacement.

Minimum Clearances

Clearances of 165mm (6 1/2") above, 100mm (4") below, 5mm
(1/4") at the sides and 450mm (17 3/4") at the front of the boiler
casing must be allowed for servicing.
The minimum front and bottom clearance allowed when built
into a cupboard is 5mm.

To light the boiler. Refer to Frame 1

If a programmer is fitted refer to separate instructions for the
programmer before continuing.
1. CHECK THAT THE ELECTRICITY SUPPLY TO THE BOILER

IS OFF.

2. Set the mains ON/OFF switch (A) to OFF and the thermostat

knob (F) to maximum.

3. Switch ON the electricity supply to the boiler and check that

all external controls, e.g. programmer, room thermostat, etc.,
are ON.

4. Set the mains ON/OFF switch to ON.
The boiler will commence the ignition sequence, supplying heat
to the central heating, if required.
Note. In normal operation the control unit display (C) will show
the codes:

Standby - no demand for heat.

CH being supplied.

During ignition, the LED (E) will flash.
During normal running the LED (E) will remain illuminated.
Note.
If the boiler fails to light after 3 attempts the fault code

L F

will be

displayed.
Press the reset button (D) for 2 seconds then release. The
boiler will repeat the ignition sequence. If the boiler still fails to
light consult a CORGI registered installer or in IE a competent
person.
Note.
The pump will operate briefly as a self-check, once every 24
hours regardless of system demand.

All CORGI registered installers carry a CORGI ID card, and have a registration number. Both should be recorded
in the Benchmark Commissioning Checklist. You can check your installer by calling CORGI direct on 01256 372300.

THE BENCHMARK SERVICE INTERVAL RECORD MUST BE COMPLETED AFTER EACH SERVICE

Ideal Stelrad Group is a member of the Benchmark initiative and fully supports the aims of
the programme. Benchmark has been introduced to improve the standards of installation and
commissioning of central heating systems in the UK and to encourage the regular servicing of
all central heating systems to ensure safety and efficiency.

HE15

G.C. Appliance No. 41 421 99

HE24

G.C. Appliance No. 41 397 82

Destination Countries: GB, IE

icos system HE15 & HE24

(Natural Gas Only)

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icos system -

User's

Approx. flow temperatures for the boiler thermostat settings are:

Knob Setting

Flow Temperature

Minimum

Maximum

180

LEGEND

A Boiler ON/OFF switch
C Display
D Reset button
E LED
F CH thermostat knob
G Condensate drain
H Pressure gauge

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.

BOILER CONTROLS

Control of water temperature

The boiler controls the central heating radiator temperature to a
maximum of 82

C, adjustable via the thermostat knob (F).

To shut down the boiler

1. For short periods

Set the mains ON/OFF switch (A) to OFF

2. For longer periods

Set the mains ON/OFF switch (A) to OFF, and switch the
electricity supply to OFF.

For longer periods the entire system should be drained.

To relight the boiler

Repeat the procedure detailed in 'To light the boiler'.

Frost protection

If no frost protection is provided and frost is likely during a short
absence from home, leave the heating controls (if fitted) at a
reduced temperature setting. For longer periods, the entire
system should be drained.
If the system includes a frost thermostat then, during cold
weather, the boiler should be turned OFF at the time switch (if
fitted) ONLY. The mains supply should be left switched ON, with
the boiler thermostat left in the normal running position.

Boiler overheat thermostat

This thermostat will shut down the boiler in the event of
overheating. Should this occur a fault code

L A

will be displayed.

Press the reset button (D) and the boiler will re-light.
If the fault re-occurs, turn off the boiler and consult a CORGI
registered installer or in IE a competent person.

Flame failure

Should this occur a fault code L-F will be displayed. Press the

reset button and the boiler will relight. If the fault recurs, turn off
the boiler and consult a CORGI registered installer or in IE a
competent person.

Loss of system water pressure

The gauge (H) indicates the central heating system pressure. If
the pressure is seen to fall below the original installation
pressure of 1-2 bar over a period of time then a water leak may
be indicated. In this event conduct the re-pressurising procedure
(see Trouble shooting problem 4). If unable to do so or if the
pressure continues to drop a CORGI registered installer or in IE
a competent person should be consulted.
DO NOT FIRE THE BOILER IF THE PRESSURE HAS
REDUCED TO ZERO FROM THE ORIGINAL SETTING.

Condensate Drain

The condensate drain (G) must not be modified or blocked.
Blockage of the condensate drain, caused by debris or freezing,
can cause automatic shutdown of the boiler.
If freezing is suspected and the pipe run is accessible an
attempt may be made to free the obstruction by pouring hot
water over the exposed pipe and clearing any blockage from the
end of the pipe. If this fails to remedy the problem the
assistance of a CORGI registered installer or in IE a competent
person should be sought.

Escape of gas

Should a gas leak or fault be suspected contact your local gas
supplier without delay.

Do NOT search for gas leaks with a naked flame.

C l e a n i n g

For normal cleaning simply dust with a dry cloth.
To remove stubborn marks and stains, wipe with a damp cloth
and finish off with a dry cloth.
DO NOT use abrasive cleaning materials.

Maintenance

The appliance should be serviced at least once a year by a
CORGI registered installer or in IE a competent person.

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Ideal Boilers, P.O. Box 103, National Ave, Kingston Upon Hull, HU5 4JN. Tel.
01482 492251 Fax. 01482 448858. Registration No. London 322 137.

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.

Ideal Consumer Helpline

Tel: 01482 498660

www.idealboilers.com

POINTS FOR THE BOILER USER

Note. In line with our current warranty policy we would ask that you check through the following guide to identify any
problems external to the boiler prior to requesting a service engineers visit. Should the problem be found to be other than
with the appliance we reserve the right to levy a charge for the visit, or for any pre-arranged visit where access is not gained
by the engineer.

TROUBLESHOOTING - TYPICAL NON PRODUCT FAULTS

Problem

Solution

Boiler is not working for
central heating or hot water.

Check there is power to the boiler switch (A) in the ON position and `0' displayed on the
controls.

If `0' not displayed then not a boiler fault contact your installer/service company.

Check external programmer is set to an `ON' period and the relevant function selected i.e.
central heating or domestic hot water. Test by overriding the programmer by setting to
`continuous.

Check room thermostat for central heating or the cylinder thermostat for domestic hot water,
are set at the required temperature. To test operation of either thermostat turn fully up. If no
response contact your installer.

Boiler is not working for
central heating or hot water
and the display shows `L:A

L:A

L:A '

(flashing).

Press reset button (D) for 2 seconds, the boiler should then re-light. If fault recurs this
indicates an overheat condition. The boiler should be turned off and your installer contacted.

Check if ALL radiators have thermostatic radiator valves fitted. If they have contact your
installer.

Boiler is not working for
central heating or hot water
and the display shows `H:A

H:A

H:A '

(flashing).

Check pressure gauge on boiler shows a minimum of 1 bar. If not re-pressurise via the
filling loop to 1 bar (if unsure contact your installer), turn off the tap on the filling loop and turn
the on/off switch (A) off and then back on again to reset the boiler. If unable to do so or if the
pressure continues to drop after filling then contact your installer.

Check if ALL radiators have thermostatic radiator valves fitted. If they have contact your
installer.

Boiler is not working for
central heating or hot water
but attempts to fire by going
through 3 ignition attempts.
Display shows `L : F

L : F

L : F ' (flashing).

Press reset button (D) for 2 seconds to repeat ignition sequence.

Check gas supply (try another appliance cooker/fire etc.) If no gas supply then not a
boiler fault contact gas supplier.

Check condensate pipe is not blocked or frozen. If blocked clear blockage if not possible
to check contact your installer.

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