IDEAL icos system HE15 Installation And Servicing page 43

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58 BURNER INJECTOR REPLACEMENT
1. Refer to Frame 55.
2. Remove the boiler front and sealing panels. Refer to
Frames 47 & 48.
3. Disconnect the electrical leads from the fan.
4. Undo the gas pipe union connection to the injector housing.
5. Remove the screw retaining the fan mounting bracket.
6. Remove the fan and venturi assembly. Refer to Frame 50.
7. Remove the 2 injector housing screws.
8. Withdraw the injector housing.
9. Fit the new injector housing, complete with injector.
10. Reassemble in reverse order, ensuring that the new gas
seal supplied is located correctly in the injector housing.
11. Check operation of the boiler. Refer to Frame 55.
59 BURNER REPLACEMENT
1. Refer to Frame 55.
2. Remove the boiler front and sealing panels. Refer to
Frames 47 & 48.
3. Remove the fan assembly. Refer to Frame 50.
4. Remove the 6 screws securing the burner (the 3 screws at
the rear are extended to ease access).
5. Lift off the burner from the combustion chamber.
6. Fit the new burner, replacing any damaged or deteriorating
sealing gasket.
7. Reassemble in reverse order.
8. Check the operation of the boiler. Refer to Frame 55.
Note. Take care not to disturb the ionisation probes at the
front and rear of the combustion chamber.
60 CONTROL THERMISTOR AND OVERHEAT THERMOSTAT REPLACEMENT
1. Refer to Frame 55.
2. Remove the boiler front and sealing panels. Refer to Frames
47 & 48.
3. Unclip the thermistor / thermostat from the flow pipe and
withdraw it from the controls compartment.
icos system -
Installation and Servicing
Flow pipe
Overheat thermostat
Control thermistor
SERVICING
Fan
4
4. Disconnect the electrical leads from the thermistor/
thermostat.
5. Reconnect the electrical leads and reassemble in
reverse order, ensuring the spring clip is securely on
the pipe.
6. Check the operation of the boiler. Refer to Frame 55.
7
Injector
Gas pipe union
5
Ecl 2400
Mounting bracket
5
Ionisation
Probes
6
43