Replacing Components; Preparing For And Completing Replacement Work; Preparing For Replacement Work; Completing Replacement Work - Vaillant ecoTEC pro Installation And Maintenance Instructions Manual

14 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 .
An overview of the available genuine Vaillant spare parts
can be obtained:
– From your parts wholesaler
– Alternatively contact Spares Technical Enquiries on
01773 596615
or via email: technicalspares@groupservice.co.uk
14.1 Preparing for and completing replacement
work
14.1.1

Preparing for replacement work

Danger!
e
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 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).
When carrying out any repair to the boiler, make
i
sure that you observe the following instructions
for your own safety and to avoid material dam-
age to the boiler.
> Switch off the boiler.
> Disconnect the boiler from the power mains (¬ sec-
tion 11.3).
> Remove the front casing (¬ section 4.7).
> 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 11.3.2).
> Make sure that water does not drip on live components
(e.g. the electronics box).
> Use only new seals and O-rings.
Installation and maintenance instructions ecoTEC pro 0020129672_03
Replacing components

14.1.2 Completing replacement work

> Check the boiler for gas leaks.
> Reattach the front casing (¬ section 4.7).
> Perform a function check (¬ section 10.10).
14.2

Replacing the burner

> Remove the compact thermal module (¬ section 12.3.1).
14.1 Replacing the burner
> Undo the four screws (1) on the burner.
> Remove the burner.
> Fit the new burner with a new seal. Make sure that the
nose on the burner window grips the seal inside the
recess in the burner.
> Reinstall the compact thermal module.
(¬ Section 12.3.6).
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