0020244995_04 ecoTEC pro Installation and maintenance instructions
35
1
2
3
7
5
4
6
7.
Remove the ignition line plug
(5)
and the earth wire plug
(6)
from the ignition electrode.
8.
Remove the plug
(3)
from the fan motor.
9.
Remove the plug
(4)
from the gas valve assembly.
10. Unscrew the four nuts
(7)
.
11. Remove the entire compact thermal module
(2)
from
the heat exchanger
(1)
.
12. Check the burner and the heat exchanger for damage
and dirt.
13. If necessary, clean or replace the components accord-
ing to the following sections.
14. Fit a new burner flange seal.
15. Check the insulating mat on the burner flange and on
the back panel of the heat exchanger. If you notice any
signs of damage, replace the relevant insulating mat.
12.6
Cleaning the heat exchanger
1.
Protect the folded down electronics box against sprayed
water.
2
3
4
1
2.
Never undo the four nuts on the stud bolt
(1)
or tighten
them.
3.
Clean the heating coil
(3)
of the heat exchanger
(4)
us-
ing water or, if required, vinegar (to a maximum of 5%
acid). Allow the vinegar to act on the heat exchanger for
20 minutes.
4.
Rinse away any loose dirt with a sharp jet of water or
use a plastic brush. Do not point the water jet directly
at the insulating mat
(2)
on the back of the heat ex-
changer.
◁
The water flows out of the heat exchanger through
the condensate siphon.
12.7
Checking the burner
1
2
3
1.
Check the surface of the burner
(1)
for damage. If you
see any damage, replace the burner.
2.
Fit a new burner flange seal
(3)
.
3.
Check the insulating mat
(2)
on the burner flange. If you
notice any signs of damage, replace the insulating mat.
12.8
Cleaning the condensate trap
1.
Remove the lower section from the condensate trap
(1)
.
2.
Flush out the lower section with water.
3.
Fill the lower section with water up to about 10 mm be-
low the upper edge.
4.
Attach the lower section to the condensate trap.
12.9
Cleaning the filter in the cold water inlet
Validity:
Product with integrated hot water generation
1
2
1.
Close the cold water stop valve.
2.
Drain the product on the hot water side.
3.
Unscrew the cap nut
(2)
and the lock nut
(1)
from the
product's casing.
Summary of Contents for VUW 246/5-3 (H-GB)
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