Replacing Components; Safety Instructions; Replacing The Burner; Replacing The Fan Or The Gas Valve - Vaillant ecotec plus Installation And Maintenance Instructions Manual

10 Replacing components

10 Replacing components
The tasks listed below in this section may be carried out
only by a qualified heating engineer.
The original components of the product were also certi-
fied as part of the CE declaration of conformity. If you
do not use certified Vaillant original spare parts for
maintenance or repair work, this voids the CE conform-
ity of the product. We therefore strongly recommend
that you fit Vaillant genuine spare parts. You can find
information about the available Vaillant original spare
parts on the back page of these instructions, below the
contact address.
> If you require spare parts for maintenance or repair
work, use only Vaillant genuine spare parts .
• Make sure the parts are correctly fitted and that their
original position and alignment are retained.
10.1

Safety instructions

Danger!
d
Each time components are replaced, comply
with the safety instructions below for your own
safety and to avoid damage to the boiler.
• Take the boiler out of operation.
Danger!
e
Risk of fatal electric shock through contact
with live connections!
Disconnect the boiler from the power mains by
de-energising the boiler using an isolating
device with a contact opening of at least 3 mm
(e.g. fuses or power switches).
• Close the gas isolation valve and the service valves in
the heating flow and return.
• Close the service valve in the cold water supply pipe.
• Empty the boiler if you want to replace water-bearing
components of the boiler!
• Make sure that water does not drip on live
components (e.g. the electronic box)!
• Use only new seals and O-rings!
• After completing the work, perform a tightness check
and function check (see Chapter 6.4)
50
10.2

Replacing the burner

Danger!
d
Before replacing the component, observe the
safety information in Chapter 10.1.
• Dismount the compact thermal module as described in
Chapter 8.3.1.
1
Fig. 10.1 Replacing the burner
• Release the four screws (1) on the burner, and remove
the burner.
• Mount the new burner with a new seal. Make sure the
seal notch for the inspection glass fits into the notch
of the burner flange.
• Re-install the compact thermal module as described in
Chapter 8.3.4.
• After completing the work, perform a gas-tightness
check and function check (see Chapter 8.10).
10.3

Replacing the fan or the gas valve

Danger!
d
Before replacing the component, observe the
safety information in Chapter 10.1.
• Disconnect the boiler from the power mains as
described in Chapter 10.1, and close the gas isolation
valve.
• Remove the air intake pipe (1, Fig. 8.2).
• Disconnect the gas supply pipe at the gas valve
(6, Fig. 10.3).
Installation and maintenance instructions ecoTEC plus 0020214490_00