IDEAL INDUSTRIES Boiler C24 User Manual

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users guide  
mini  
Your Ideal users guide  
See reverse for mini installation and servicing guide  
C24/C28/C32  
S24/S28  
When replacing any part of this appliance, use only spare parts that you can be  
assured conform to safety and performance specification that we require. Do not use  
reconditioned or copy parts that have not been clearly authorised by Ideal Boilers  
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In these cases, however, it is advisable to install a small water  
treatment device or softener. With such a device you should  
avoid periodic descaling.  
CONTROL OF CH TEMPERATURE  
The output temperature of CH water is adjustable from a  
minimum of about 38°C to a maximum of about 85°C by  
turning the knob C.  
Consequently, the DHW heat exchanger will keep its  
performance consistent for a longer period of time with  
resulting gas savings.  
Approx CH flow temperatures for the boiler thermostat  
settings:  
TO SHUT DOWN THE BOILER  
For short periods  
Minimum (38 ° C)  
To turn the boiler off set the function selector C to the O  
position.  
The appliance On lamp A will flash every 4 seconds.  
C
For long periods  
When you do not expect to use the boiler for a long period:  
Maximum (85 ° C)  
1
2
Switch the the electricity supply off.  
Shut off the gas supply cock and the valves for the water  
circuits fitted under the boiler.  
3
If necessary, empty the water circuits.  
CONTROL OF DHW TEMPERATURE  
(Mini C24, Mini C28 and Mini C32)  
FROST PROTECTION  
Mini C24, Mini C28 and Mini C32 appliances are provided  
with a built in anti---freeze system that operates the boiler  
when the temperature is below 4 ° C  
Therefore, when the boiler is not lit and used in cold weather,  
with consequent risk of freezing do not isolate the boiler  
from the electricity supply or close the gas inlet cock.  
The temperature of the DHW leaving the boiler can be varied  
from a minimum of about 35°C to a maximum of about 55°C  
(within the power limits of the appliance) by turning the  
temperature control knob B.  
Minimum (35 ° C)  
ESCAPE OF GAS  
Should a gas leak or fault be suspected contact your local  
gas supplier without delay.  
B
Do not search for gas leaks with a naked flame.  
Maximum (55 ° C)  
CLEANING  
For normal cleaning simply dust with a dry cloth.  
To remove stubborn marks and stains use a damp cloth and  
mild detergent.  
Adjustment of the DHW temperature is completely separate  
from that of the CH circuit.  
Do not use abrasive cleaning materials.  
The adjustment system integrated within the boiler  
automatically controls the flow of gas to the burner in order to  
keep the temperature of DHW delivered constant, between  
the limits of maximum and minimum output.  
MAINTENANCE  
The appliance should be serviced at least once a year by a  
CORGI registered installer.  
Where the demand is at a low level or with the temperature  
set to the minimum, it is normal to see a cycle of lighting and  
extinguishing of the burner when running.  
FAULTS  
No heating or hot water  
Adjustment  
Check that gas and electricity are available at the boiler and  
that all switches are on.  
It is advisable to adjust the DHW temperature to a level  
commensurate with the demand, minimising the need to mix  
with cold water. In this way, the automatic control facilities will  
be fully exploited.  
Check that the system water water pressure gauge G reads at  
least 0,5 bar.  
Check the lock---out signal lamp E. If it is illuminated press the  
boiler reset button D to restart the ignition sequence.  
Moreover, where the amount of limescale present in the water  
may be particularly great, not exceeding the position as  
shown in the following illustration (about 50 ° C) minimises  
annoying incidences of scale deposits and clogging.  
Hot water but no heating  
Check that the programmer and room thermostat (if fitted) are  
both calling for heat.  
Heating but no hot water  
Check that cold water flows out of the taps at a minimum rate  
of 3.5 litres per minute (or 1 pint in 10 seconds or less). If not,  
look for stop valves not fully open.  
B
If these simple checks fail to solve the problem, or the  
problem recurs, consult your service engineer.  
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Points for 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  
·
·
Is there power to the boiler i.e. is the left hand side green LED (A) alight and  
flashing every 4 seconds. If not this is not a boiler fault – contact the installer  
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 press the reset button (D) to  
reset the boiler. If unable to do so or if the pressure continues to drop after  
filling then contact your installer  
Boiler is not working for  
central heating or hot water  
·
·
Is the lockout signal lamp (E) alight – Press boiler reset button (D) – If boiler  
still does not fire contact the installer  
Boiler goes through ignition  
sequence but will not fire for  
either central heating or hot  
water and then goes to  
ignition lockout  
Check gas supply (try another gas appliance cooker/fire etc) If no gas  
supply then this is not a boiler fault – Contact the gas supplier  
Fan & pump run  
continuously but there is no  
attempt at ignition  
·
Check that the air pressure switch test caps, on top of the boiler, are fitted  
correctly.  
Mini C Only  
·
·
·
Check that integral programmer is set to an ‘on’ period and the function  
switch is set to ‘auto’ – If it still does not operate contact your installer  
If fitted with an external programmer check that the central heating channel  
is set at an ‘on’ period – If it still does not operate contact your installer.  
Check the room thermostat is set at the required temperature – Test the  
room thermostat by turning fully up – If this does not respond contact your  
installer  
Operating for hot water but  
will not operate for central  
heating  
·
Check the radiator temperature control (C) is set at the winter setting for  
central heating.  
The nature of all combination boilers is to heat up water directly from the incoming mains water supply directly  
through the boiler to supply domestic hot water at the stated flow rates, (as shown in the boiler installation  
instructions), to achieve a 35°C temperature rise. As the ambient temperature of the cold main varies during the  
summer and winter months it is likely in the colder winter months that the flow rate will need to be reduced at the  
outlet taps to achieve the same temperatures achieved in the warmer summer months. This is not a fault with the  
appliance but is relevant to the varying temperature of the incoming cold mains water supply.  
Mini S Only  
·
·
If fitted with an external programmer check that the central heating channel  
is set at an ‘on’ period – If it still does not operate contact your installer.  
Check the room thermostat is set at the required temperature – Test the  
room thermostat by turning fully up – If this does not respond contact your  
installer  
Operating for hot water but  
will not operate for central  
heating  
·
·
If fitted with an external programmer check that the domestic hot water  
channel is set at an ‘on’ period – If it still does not operate contact your  
installer.  
Check the cylinder thermostat is set at the required temperature – Test the  
cylinder thermostat by turning fully up – If this does not respond contact  
your installer  
Operating for central heating  
but will not operate for hot  
water  
Caradon Ideal Limited 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  
Ideal Boilers, P.O. Box 103, National Ave, Kingston Upon Hull, HU5 4JN. Tel.  
01482 492251 Fax. 01482 448858. Registration No. London 322 137.  
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