Maintenance
Dismantling the combustion chamber
unit
.
Removethe combustion chamberhousing after
releasingthe toggles.
. Removethe plug connectionsfrom the following
components:
Ignition, ionisation, flow and return sensor,flue
gastemperaturesensorand gasfan.
. Pullthe anti-radiation panelforward andunhook
the panel.
. Releasethe fixings betweenthe gasconnection
and mixing chamber.
. Release the nuts (three no.) on the small
combustion chamber lid.
.Removethe whole unit (mixingchamber,fan and
small combustion chamber lid).
Flowsensor.
plug
Gasfanplug
Ignitionplug
lonisationplug
Earthplug
Fluegas
sensorplug
Fig.: Gas-fired condensingboiler with combustion chamber
housing removed
Anti-radiation panel
Fig.: Anti-radiation panel
Fixingsbetweenthe gasconnection and mixing chamber
Fig.: Fixingsbetweenthe gasconnectionandmixingchamber
Nut on the small combustion chamberlid
Fig.: Nut on the combustion chamberlid
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