Replacing components
62
ecoTEC plus installation and maintenance instructions 0020134823_01
15
15 Replacing
components
The work described in this section must only be carried out
by a competent person.
>
Only use genuine Vaillant spare parts for repairs .
You can find information about available Vaillant genuine
spare parts from the contact address provided on the
reverse of this document.
15.1
Preparing for and completing replacement
work
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 maintenance work
on the boiler, switch the boiler off using
the on/off button.
>
Disconnect the boiler from the power
mains by de-energising the boiler using a
partition with a contact opening of at
least 3 mm (e.g. fuses or power switches).
i
When carrying out any repair to the boiler, make
sure that you observe the following instructions
for your own safety and to avoid material dam-
age to the boiler.
>
Switch off the boiler.
>
Isolate the boiler from the power mains.
>
Remove the front casing (
¬ section 4.6
).
>
Close the gas isolator cock.
>
Close the service valves in the heating flow and in the
heating return.
>
Close the service valve in the cold water pipe.
>
Drain the boiler if you want to replace components that
carry water (
¬ section 13.2.2)
.
>
Make sure that water does not drip on live components
(e.g. the electronics box).
>
Use only new seals and O-rings.
Completing replacement work
>
Check the boiler for gas tightness.
>
Reattach the front casing (
¬ section 4.6
).
>
Carry out a function test
(
¬ section 11.5.1
to
11.5.3
).
15.2
Removing/fitting the side section
(if required)
15.1 Removing/installing the side section
b
Caution
Risk of material damage caused by
mechanical deformation.
Removing
both
side sections may cause
mechanical distortion in the product, which
may cause damage to the piping, for exam-
ple, and potentially result in leaks.
>
Always only remove
one
side section –
never both side sections at the same
time.
To remove one side section:
>
Tilt the electronics box forward.
>
Remove the upper casing (
¬ section 13.4
).
>
Hold on to the side section so that it cannot fall, and
unscrew the lower front and upper central screws from
the side section.
>
Tilt the side section slightly to the side and pull it out
towards the front.
To fit the side section:
>
Push the side section into the bracket. When doing so,
ensure that all straps on the side panel engage with the
rear back wall in order to prevent leaks.
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