Troubleshooting 10
0020233500_01 auroCOMPACT Installation and maintenance instructions
39
10.10.4 Replacing the Venturi
2
1
3
1.
Remove the air intake pipe.
2.
Remove the plug from the sensor on the Venturi jet
(2)
by pressing on the locking lug.
3.
Undo the cap nut
(3)
for the gas connection pipe
(1)
on
the gas valve.
4.
Remove the Venturi jet and the gas connection pipe
from the fan by turning the bayonet fitting on the Venturi
jet as far as it will go anti-clockwise and then pulling the
Venturi jet out of the fan.
1
7
6
5
4
2
3
5.
Remove the gas connection pipe
(1)
from the Venturi
(3)
by removing the clamp
(4)
and pulling the gas con-
nection pipe out vertically. Dispose of the seal
(7)
.
6.
Pull the burner jet
(6)
straight off and keep it for re-use.
7.
Check whether the Venturi is free of residue at the gas
inlet side.
Danger!
Risk of poisoning due to increased CO
values.
An incorrect gas restrictor size can lead to
increased CO values.
▶
When replacing the Venturi, ensure that
you use the correct gas restrictor (colour
coding and position of pins on the under-
side of the gas restrictor).
Caution.
Risk of material damage to the product.
Lubricant can block function-related channels
in the Venturi.
▶
Do not use lubricant when installing the
gas restrictor.
8.
Insert the gas restrictor for the gas group in question
(which may have been replaced) into the (new) Venturi.
Type of gas
Colour of the gas
restrictor
G20 natural gas
Yellow
G25 natural gas
Blue
G31 propane
Grey
Note
Make sure that the colour of the gas re-
strictor matches the colour of the coding
resistor on the PCB.
When inserting the gas restrictor, ensure that
the gas restrictor is correctly aligned using
the indicated position marks on the upper
side of the Venturi and also the position-
ing pins
(5)
on the underside of the gas re-
strictor.
9.
Reinstall the components in the reverse order. Use new
seals for this.
10. After installing the new Venturi jet, check the type of
gas and set the gas ratio (
→
Page 20).
11. If you cannot adjust the CO2 content, the gas restrictor
has been damaged during installation. In this case,
replace the gas restrictor with an appropriate spare
part.
10.10.5 Replacing the heat exchanger
1.
Empty the product
2.
Remove the compact thermal module. (
→
Page 32)
3.
Detach the condensate drain hose from the heat ex-
changer.
