Removing Outer Case; Draining The Appliance; Cleaning Of Burner And Lint Arrestor; Cleaning Of Burner - Vaillant VCW 2O Instructions For Installation And Servicing

8.1.1 Removing outer case (fig.44)
Remove door by unscrewing hinge pin (b) and
oullinq door out and down. Remove upper
banei Oy pulling outwards. Remove gauge
jlanel bir iemoving boiler thermostat knob'
'screw
over rockei switches and loosening
screws (c) and sliding right hand panel to the
left.
Remove side panels by unscrewing top and
buttom screws (d) to clear internal clips and
then pulling panels outwards and off' In the
case of the balanced flued combi boiler
VCW-sine remove the 4 screws and washers
(A) to remove combustion chamber case as
shown in fig.45.
t
8.1.2 Draining the aPPliance
(fig.44 and 46)
When necessary, the appliance may be drained
as follows.
- Open air vent (18, fig. 46) .
-
Drain appliance through draln nlpple (tr,
fig. 46).
- D-rain domestic heat exchanger via drain
screw (C, fig. 46) as well as pressure
relief vdlve (D, fig. 46) at the lower part
of the water section.
8.2 Cleaning of burner and lint arrestor
8.2.1 Cleaning of burner
8.2.1.1 Balanced llued appliances
Remove the burner by unscrewing the retaining
union nut (E), the pilot airfilter (F), take care not
to lose the pilot inlector. Remove the thermo
couple by pulling down and taking off the high
ten6ion lead from the ignition electrode.
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