Inspection and maintenance 10
0020258016_01 ecoTEC pure Installation and maintenance instructions
29
10.6
Draining the product
1.
Close the service valves of the product.
2.
Start check programme P.06 (diverter valve mid-posi-
tion).
3.
Open the drain cock.
4.
Make sure that the cap of the automatic air vent on
the internal pump is open so that the product can be
drained fully.
10.7
Removing the compact thermal module
Note
The compact thermal module consists of four
main components:
–
Speed-regulated fan,
–
Gas-air mixture unit,
–
Gas supply (mixture pipe) with burner flange,
–
Premix burner.
Danger!
Risk of death and risk of material damage
caused by hot flue gas.
The seal, insulating mat and self-locking nuts
on the burner flange must not be damaged.
Otherwise, hot flue gases may escape and
cause personal injury and material damage.
▶
Replace the seal each time you open the
burner flange.
▶
Replace the self-locking nuts on the
burner flange each time you open the
burner flange.
▶
If the insulating mat on the burner flange
or on the back wall of the heat exchanger
shows signs of damage, replace the insu-
lating mat.
1.
Switch off the product using the on/off button.
2.
Close the gas isolator cock.
3.
Remove the front casing.
4.
Tilt the electronics box forwards.
2
1
3
5.
Unscrew the retaining screw
(1)
and remove the air
intake pipe
(2)
from the intake stub.
6.
Unscrew the cap nut from the gas valve
(3)
.
1
5
4
3
7
6
2
7.
Remove the ignition line plug
(3)
and the earth line plug
(4)
from the ignition electrode.
8.
Remove the plug
(1)
from the fan motor.
9.
Remove the plug
(2)
from the gas valve.
10. Unscrew the four nuts
(7)
.
11. Remove the entire compact thermal module
(5)
from
the heat exchanger
(6)
.
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 wall of the heat exchanger. If you notice any
signs of damage, replace the relevant insulating mat.
10.8
Cleaning the heat exchanger
1.
Protect the folded down electronics box against spray-
ing water.
1
3
4
2
2.
Do not undo the four nuts on the threaded pins
(1)
, oth-
erwise the tightness of the burner during set-up cannot
be guaranteed.
3.
Clean the spiral immersion heater
(3)
of the heat ex-
changer
(4)
using water or, if required, vinegar (up to a
maximum acid content of 5%). 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 jet of water dir-
ectly at the insulating mat
(2)
on the back of the heat
exchanger.