Vaillant ecoTEC plus VU 446/5-5 (H-GB) Installation And Maintenance Instructions Manual page 39

–
Tightening torque: 6 Nm
4. Reconnect the plugs (1), (2), (3), (4) and (5).
2
4
5. Connect the gas pipe (4) using a new seal.
6. Open the gas stopcock.
7. Make sure that there are no leaks.
8. Check that the sealing ring in the air intake pipe (3) is
positioned correctly in the seal seat.
9. Reconnect the air intake pipe to the intake stub.
10. Secure the air intake pipe using the retaining screw (2).
11. Reconnect the test system's silicone pipe for checking
the airflow rate (1).
11.3.6 Checking the ignition electrode
3
2
1
1. Disconnect the earth cable (1).
2. Remove the fixing screws (2).
3. Carefully remove the electrode (3) from the combustion
chamber.
4. Ensure that the electrode ends are undamaged.
5. Clean and check the gap between the electrodes.
– Clearance for the ignition electrodes: 4.5 ± 0.5 mm
6. Replace the seal (4).
7. Install the electrode. To do this, proceed in reverse or-
der.
0020261389_02 ecoTEC plus Installation and maintenance instructions
3
1
4
Inspection and maintenance 11
11.3.7 Cleaning the rainwater collector's draining
circuit
A
B
1. Ensure that the rainwater collector is not dirty or
blocked and, if required, clean it.
2. Pour water into the rainwater collector (A).
3. Check whether the water drains correctly via the drain
(B).
▽
If the water does not drain correctly, clear out the
draining circuit.
11.3.8 Cleaning the condensate siphon
C
1. Unclip the lower section of the siphon (1) from the up-
per section of the siphon (2).
2. Remove the float (3).
3. Flush out the float and lower section of the siphon with
water.
2
A B
3
1
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