Carrying Out Electronics Self-Tests - Vaillant ecoTEC plus 806 VU GB 806/5-5 Installation And Maintenance Instructions Manual

9 Inspection and maintenance
9.4

Carrying out electronics self-tests

Menu → Installer level → Test programs → Electronics
self-test
You can use the electronics self-test to check the PCB in
advance.
9.5 Removing the gas-air mixture unit
Note
The gas-air mixture unit consists of four main
components:
– Speed-regulated fan,
– Air intake pipe,
– Gas valve,
– Burner
1. Switch off the product using the on/off button.
2. Disconnect the product from the power mains.
3. Close the gas isolator cock.
4. Remove the front casing. (→ Page 10)
5. Remove the upper casing. (→ Page 10)
Conditions: Applies for 80 kW
2
▶
Undo the clip (1) on the air intake pipe (2). and remove
the air intake pipe from the intake nozzle.
▶
Undo the four screws on the flange connection (3) to the
gas valve.
28
Conditions: Applies for 100 kW and 120 kW
▶
Undo the four screws on the flange connection (3) to the
gas valve.
6. Move the gas pipe (4) to the side.
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3
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Installation and maintenance instructions ecoTEC plus 0020134823_04
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