Technical data

INSTALLATION & SERVICING INSTRUCTIONS
c Remove the two thermostat sensor mounting screws from the boiler flow pipe.
d Disconnect the limit thermostat leads from the adaptors on the gas control valve.
e Remove the grommet from the top of the boiler, remove limit thermostat and leads.
f Reassemble in reverse order.
9.2.8 Replacement of Piezo Generator
a Detach electrode lead from rear of piezo generator.
b Remove piezo generator mounting nut, remove generator from bracket.
c Reassemble in reverse order.
9.2.9 Replacement of Heat Exchanger
a Drain down the heating system.
b Remove combustion chamber door (see
Section 9.1.2).
c Remove the attic fixing screw and remove the attic by pulling forward. Remove the two attic
insulation pieces.
d Remove the two combustion chamber side insulation pieces (see
Section 9.2.10).
e Unscrew the flow and return compression fittings above the boiler and break the connections.
f Unscrew the flow and return compression fittings on the heat exchanger.
g Loosen the flow and return pipe back nuts, on the top of the boiler.
h Tilt heat exchanger up at front, remove flow and return pipes. Remove heat exchanger.
i Reassemble in reverse order.
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9.2.10 Replacement of Combustion Chamber Insulation Pieces
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