Spark Electrode; Removing The Burner - Vaillant ecoTEC plus Instructions For Installation And Servicing

8 Inspection and maintenance
8.1.5

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 8.4.
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.
8.1.6

Removing the burner

Note!
If the functional checks did not indicate poor
combustion then it is not necessary to service
the burner.
Caution!
The burner door seal and combustion chamber
burner door securing nuts on the burner
module, see figs 8.6 and 8.7 must be replaced
each time the module is removed for example
during maintenance if the burner flange
insulation shows any signs of damage or small
cracks it must also be replaced.
Isolate the gas supply at the gas service cock.
Disconnect the gas supply at 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 8.5.
Drop down the electronics box into the
service position.
Remove the four screws from the chassis front,
see fig 8.2.
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 valve electrical plug at the gas
valve.
Disconnect the electrical leads from the fan.
Remove the five combustion chamber burner door
securing nuts, these should be discarded and replaced
with the new nyloc nuts supplied in the burner door
seal kit.
Gently remove the fan, gas valve and burner assembly
from the combustion chamber complete with the gas
pipe bracket and seal, see fig 8.6.
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.
Remove and discard the burner door seal and replace
with new, see fig 8.7.
Removal of the burner is not necessary during a
normal service.
34
VIEWING
WINDOW
Fig. 8.3 Flame picture
Fig. 8.4 Gas service cock
Fig. 8.5 Gas service cock
Installation and Servicing ecoTEC plus