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

14 Servicing

14.4 Spark Electrode

Disconnect the ignition lead and earth lead from the
igniter unit and two securing screws at the spark
electrode. Withdraw the spark electrode carefully from
the combustion chamber, see fig 14.3.
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.

14.5 Burner

Refer to figs 14.2, 14.4, 14.5 and 14.6.
Isolate the gas supply at the gas service cock.
Disconnect the gas supply at the union nut of the gas
service cock.
NOTE:
Do not disconnect at the gas valve.
Remove the two gas pipe bracket securing screws from
underside of inner case, see fig 14.4.
Drop down the control panel into the service position.
Remove the four screws from the chassis front, see fig
14.2.
Remove the chassis front by pulling it out at the top from
its retaining slots.
NOTE:
When replacing chassis front panel ensure the
bottom fits behind lip.
Disconnect the gas control valve plug at the gas control
valve, see fig 14.5.
Disconnect the electrical leads from the fan.
Remove the five combustion chamber front securing
nuts, see fig 14.6.
Gently remove the fan, gas control valve and burner
assembly from the combustion chamber complete with
the gas pipe bracket and seal.
Clean the burner with a soft brush taking great care not
to damage the front insulation. DO NOT use wire or
sharp instruments to clean the holes of the burner.
Inspect the burner for any signs of damage.
Removal of the burner from the fan, gas control valve
and burner assembly is not necessary during an annual
service.
Instructions for Use, Installation and Servicing ecoMAX pro
FLUE
ADAPTER
ELECTRODE
CONNECTOR
IGNITION
LEAD
FAN
Fig 14.3
Fig 14.4
COMBUSTION
ANALYSER
TEST POINT
HEAT
EXCHANGER
COMBUSTION
CHAMBER
FRONT
SECURING
NUTS
(5 OFF)
GAS
CONTROL
VALVE
Fig 14.5
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