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SERVICING
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Concord CXSi/H - Installation & Servicing
LH burner
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SERVICING
Caradon Ideal Limited does not accept any liability resulting
from the use of unauthorised parts or the repair and servicing
of appliances not carried out in accordance with the Company’s
recommendations and specifications.
A comprehensive service should be carried out at least once a
year. The User is advised to make a contract with a CORGI
registered installer.
WARNING. ALWAYS turn OFF the gas supply at the gas cock
and disconnect the electricity supply to the appliance BEFORE
servicing or replacing any components.
If access is required to the electrical plug-in terminals at the
back of the control box then remove the casing top panel; it is
not advisable to try and remove the control box back panel
from the boiler with the plugs in place.
CLEANING THE BOILER
Remove the casing door panel. Lift and remove the casing lower
front panel. Undo and pull off all the plugs from the gas valve
solenoids. Turn off the gas at the gas inlet cock. Undo the 2
unions at either side of the gas valve assembly and remove
the assembly complete.
Pull off the leads to the spark electrode on the RH end burner
- access via the side of the combustion chamber. Pull off the
lead to the flame detector electrode at the LH end burner.
Lift off the casing top panel. Undo the 3 elongated nuts from
each of the NOx ducts and remove all the ducts. Undo the M5
nuts and washers retaining the burner light back shield and
remove it. Undo the four M6 nuts and washers securing the
burner tray and carefully pull it from the boiler, ensuring that no
wires are trapped. Undo the screws securing the cleanout
cover(s) and remove.
Remove all loose deposits from the heat exchanger (especially
from between the fins), using the brush provided, and remove
all debris from the combustion chamber floor - take care not to
damage the insulation.
Examine the burner assembly. Clean the burner bars by
brushing them down with a stiff bristle (not wire) brush. Check
each bar carefully to ensure that all flame ports are
clear, that there are no cracks and that all surfaces
are free from accumulated deposits.
If available, an industrial vacuum cleaner may be useful to assist in
this work. When cleaning the burner bars, take care to avoid damage
from rough handling to the ignition or detection electrodes.
Inspect the ignition and detection electrodes.
Ensure that they are clean and in good condition. In particular, check
that:
1. The ignition electrode shield and base fixing screws are tight.
2. The electrodes are correctly positioned .
3. Check that the gap between the electrode tips is 4mm.
4. Reassemble in reverse order. Ensure that no wires are
trapped when replacing the burner tray. Refit the flue baffles,
cleanout cover, light back shield, NOx ducts, electrode
connections and casing panels.
When refitting the plugs to the gas valve solenoids do NOT
overtighten the fixing screws.
SERVICING
157294-3.pmd 11/8/2005, 9:59 AM25