Alde Compact 3020 Manual De Servicio página 10

3:4 SPARK PLUG REPLACEMENT
When replacing the spark plug, the sensor should also
be replaced.
1. Remove the burner as per point 3:3.
2. Remove the screws (Fig. 5A) and remove the spark
plug (Fig. 5B).
3. Fit the new plug and screw tight. Check that the dis-
tance between the tips of the spark plug is 3.5–4.5 mm
and that it is correctly positioned (see Fig. 5).
4. Fit the burner as per point 3:3 and test start the boiler.
3:5 SENSOR REPLACEMENT
When replacing the sensor, the spark plug should also
be replaced.
1. Remove the burner as per point 3:3.
2. Remove the screw (Fig. 5C) and remove the sensor (Fig. 5D).
3. Fit the new sensor so that its tip is above the burner as
shown in Fig. 5 and screw tight.
4. Fit the burner as per point 3:3 and test start the boiler.
3:6 SOLENOID VALVE REPLACEMENT
1. Remove the service hatch on the boiler.
2. Remove the terminal block (Fig. 1J) from the circuit board.
3. Unscrew the gas pipe (use holding tool) on the burner
(Fig. 6A) and the solenoid valve (Fig. 6B).
4. Remove the three screws (Fig. 7A) to the solenoid
valve attachment.
5. If necessary the upper coil can be unscrewed in order
to facilitate removal of the solenoid valve. Unscrew the
nut (Fig. 7B).
6. Remove the plate over the coil (Fig. 7C) and lift out the
upper coil (Fig. 8A) on the solenoid valve.
7. L ift up the solenoid valve and fit the new one in reverse
order. Check that the cable to the upper coil is in the
groove in the plate (Fig. 8B).
8. Tighten the gas pipe nuts (use holding tool) to the sole-
noid valve
(Fig. 6B) and burner (Fig. 6A) to a torque of 7–9 Nm.
Don't forget to check that the cones are correctly fitted
on the pipe.
9. Check that the system is sealed, and use leak spray
to test that the couplings are sealed when the boiler is
working.
10. Fit the service hatch.
10
Fig. 5.
A
3,5-4,5 mm
B
A
Fig. 6.
B
Fig. 7.
B
C
Fig. 8.
B
D
C
A
A
A
B