Cleaning The Heat Exchanger; Checking The Burner; Checking The Ignition Electrode - Vaillant ecoFIT sustain 825 Installation And Maintenance Instructions Manual

11 Inspection and maintenance
5
4
3
B
7. Remove the air intake pipe (3).
8. Remove the plugs from the gas valve assembly (4) and
from the fan (5).
6
D
A
9. Remove the gas-air mixture unit (6).
7
7
8
10. Remove the burner seals (7) and the burner (8).
11. Check the burner and the heat exchanger for damage
and dirt.
12. If necessary, clean or replace the components accord-
ing to the following sections.
13. Install the two new burner seals.
26
A
B
C
Installation and maintenance instructions ecoFIT sustain 0020230529_04
11.6

Cleaning the heat exchanger

1
1. Protect the open electronics box from spraying water.
2. Clean the ribs of the heat exchanger (1) with water.
The water runs out into the condensate tray.
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11.7

Checking the burner

1. Search the surface of the burner for possible damage. If
you see any damage, replace the burner.
2. Install the two new burner seals.
11.8

Checking the ignition electrode

3 4
2
1
1. Disconnect the connection (2) and the earth cable (1).
2. Remove the fixing screws (3).
3. Carefully remove the electrode from the combustion
chamber.
4. Check that the electrode ends (4) are undamaged.
5. Check the electrode distance.
– Clearance for the ignition electrodes: 3.5 to 4.5 mm
6. Make sure that the seal (5) is free from damage.
If necessary, replace the seal.
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5