IDEAL Concord CXi 110 Installation & Servicing Manual page 28

37 SERVICING - continued
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. Lift out the flue baffles.
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.
38 REPLACEMENT OF COMPONENTS - Refer to Frames 5, 41 and 42.
GENERAL
WARNING. ALWAYS turn OFF the gas supply at the gas inlet cock
and switch OFF and DISCONNECT the electricity supply BEFORE
working on the appliance.
28
SERVICING
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. 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.
Concord CXi -
Installation