Replacing components
Installation and maintenance instructions ecoTEC plus 0020134833_01
81
14
14.10
Replacing the impeller sensor on the
layered storage tank
>
Close the stop valve on the hot water system and drain
the boiler and layered storage tank on the hot water
side.
1
4
5
2
3
14.16
Replacing the impeller sensor
>
Remove the discharge pipe (
1
) from the expansion relief
valve on the boiler.
>
Remove the plug from the impeller sensor.
>
Loosen the screwed connections (
2
) and (
3
) on the
angle pieces (
4
) and (
5
).
>
Turn the impeller sensor slightly to the side and pull it
downwards to remove it from the casing.
>
Remove the pipe elbow from the impeller sensor.
>
Fit the pipe elbow to the new impeller sensor and use
new seals for it.
>
Install the new impeller sensor in reverse order and use
new seals for it.
>
Insert the plug for the connection cable into the new
impeller sensor.
>
Refit the discharge pipe (
1
) and use new seals.
>
Fill and purge the boiler and the layered storage tank.
14.11
Replacing the PCB and/or the display
e
Danger!
Risk of death from electric shock!
Mains connection terminals L and N remain
live even if the continuous voltage on/off
switch is turned off.
>
Before carrying out repair work on the
boiler, switch the boiler off using the on/
off button.
>
Disconnect the boiler from the power
mains by disconnecting the mains plug
or by de-energising the boiler via a parti-
tion with a contact opening of at least
3 mm (e. g. fuses or power switches).
b
Caution.
Risk of material damage caused by incor-
rect repairs.
Using an incorrect spare part display can
cause damage to the electronics.
>
Before replacing, check that the correct
spare part display is available.
>
Only
fit the correct spare part display.
i
Comply with the assembly and installation
instructions provided with the spare parts.
Summary of Contents for ecoTEC plus VUI
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