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55 FAN REMOVAL AND CLEANING
1.
Undo the fan inlet venturi top securing screw.
2.
Slacken the other 2 securing screws.
3.
Slide the venturi upward to disengage the sensing pipe
from the gas manifold.
4.
Withdraw the venturi, complete with sensing pipe, from the
boiler.
5.
Depress the retaining clip and rotate the fan to the right to
disengage the bayonet fixing on the fan outlet.
6.
Draw the fan forward and unplug the electrical lead from
the motor.
7.
Withdraw the fan from the boiler.
Check that the fan impeller runs freely. Clean with a soft
brush and renew as necessary.
Note. Always take care when handling the fan, in order to
preserve the balance of the impeller.
56 BURNER REMOVAL AND CLEANING
1. Disconnect the ignition and detection leads from the electrodes.
2. Undo the 3 fixing screws securing the burner assembly.
Withdraw the burner assembly downward and out of the heat
exchanger.
3. Brush off any deposits that may have collected on the burner,
ensuring that the flame ports are unobstructed. Note. Brushes
with metallic bristles must NOT be used.
Response SE Combi -
SERVICING
Installation
Legend
A Venturi
B Sensing pipe
4.
Inspect the spark and detection electrodes.
Ensure that they are clean and in good condition -
replace if necessary.
5.
Check that the spark and electrode gaps are
correct.
6.
Check that the spark and detection leads are in
good condition and renew as necessary.
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