Change Of Thermocouple; Change Of Spark Electrode; Change Of Ntc Probe; Change Of Automatic Air Vent - Vaillant VCW 2O Instructions For Installation And Servicing

8.10 Change of thermocouple
Disconnect the retaining nut (R) and pull the
thermocouple out of the thermocouple support.
Insert the new thermocouple fully into the
support. (ln case of VCW-sine seal the
thermolead into the bottom of the chamber
plate by a special rubber washer). Connect the
retaining nut.
8.'l1 Change of sPark electrode
(VCW-sine only)
Pull off the high voltage lead, remove the
retaining screw (S), remove the spark electrode
and
replace with
the new
electrode.
Reassemble in reverse order, ensuring that the
spark gap from the electrode to the flame shield
is 3 m;, taking care not to overtighten the f ixing
screw.
8.12 Change of NTC (negative temperature
coefficient) Plobe
Disconnect the AMP plug and unscrew the
NTC probe. Reassemble in reverse order'
8.13 Change of automatic air vent
Drain the appliance as under 8'1 and 8.1.2.
Unscrew the automatic air vent by hand.
Reassemble in reverse order, screwing the
automatic air vent in bY hand onlY.
Open the locking cap (LC) of the automatic air
vent by 1 -2 turns.
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