9 Inspection and maintenance
28
Installation and maintenance instructions ecoTEC plus 0020134823_04
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
1
▶
Undo the clip
(1)
on the air intake pipe
(2)
. and remove
the air intake pipe from the intake nozzle.
3
4
▶
Undo the four screws on the flange connection
(3)
to the
gas valve.
Conditions
: Applies for 100 kW and 120 kW
3
4
▶
Undo the four screws on the flange connection
(3)
to the
gas valve.
6.
Move the gas pipe
(4)
to the side.
