Servicing; General; Spark Electrode - Vaillant ecoMAX pro SERIES Instructions For Use Installation And Servicing

15 Servicing

15 Servicing

15.1 General

To ensure the continued safe and efficient operation of
the boiler it is recommended that it is checked and ser-
viced as necessary at regular intervals. The frequency
of servicing will depend upon the particular installation
conditions and usage, but in general once per year
should be adequate. It is law that all servicing is carried
out by a competent person (CORGI registered).
All routine servicing requirements can be achieved by
the removal of the front panel, inner panel and chassis
front only.
Remove the two screws on the underside of the front
panel and lift off. Undo the two screws on the front of
inner panel and lift off, see Fig. 15.7.
To remove chassis front, refer to section 15.3.
Unless stated otherwise any part removed during servi-
cing should be replaced in the reverse order to removal.
Important:
Before starting any maintenance work:
- Isolate the mains electricity supply by disconnecting
the plug at the socket outlet (if there is only an isola-
ting switch, remove the fuse from the switch).
- Turn off the gas supply at the gas service valve fitted
to the boiler
- When removing any water carrying components ensu-
re that the water is kept away from all electrical com-
ponents.
- Always use new seals and O-rings when replacing
parts.
- Always test for gas soundness and always carry out
functional checks after any service work and after
exchanging any gas carrying components.
- Always check earth continuity, polarity and resistance
to earth with a multimeter after any service work and
after exchanging any electrical component.
Note!
The boiler is fitted with a combustion analysis
test point. A suitable combustion analyser can
be connected to this point to establish the com-
bustion performance of the boiler.
It is not necessary to check the CO
the air ratio of the boiler during the annual service.
Checking/adjustment of this value is only required in the
following instances; replacement of gas valve or fan,
conversion from Natural Gas/ LPG or if incorrect combu-
stion is suspected.
24
content or adjust
2

15.2 Spark Electrode

Disconnect the ignition lead and earth lead from the
ignitor unit and two securing screws at the spark
electrode. Withdraw the spark electrode carefully from
the combustion chamber, see Fig. 15.1.
Inspect the tips for damage.
Clean away any debris and check the spark gap is
3.5 -4.5 mm.
Check the electrode gasket for signs of damage and
replace if necessary.
SPARK GAP
3.5 to 4.5mm
SPARK
ELECTRODE
SECURING
SCREW
2 OFF
EARTH
LEAD
Fig. 15.1
Instructions for Use, Installation and Servicing ecoMAX pro
HEAT
EXCHANGER
GASKET