Worcester 29CDi GC 47-406-34 Installation, Commissioning And Servicing Instructions page 40

SERVICING AND SPARES
3. PRIMARY SENSOR
B Press retaining clip on plastic moulding and pull upwards until clear of
pocket in heat exchanger.
B Separate sensor from connector, coat new sensor with heat
conductive paste and replace.
4. OVERHEAT THERMOSTAT
B Remove two electrical connectors from thermostat.
B Unscrew the sensor.
5. FLUE LIMIT THERMOSTAT
B Remove electrical connections.
B Push the flue limit thermostat into the sump.
B Retrieve the thermostat from the sump well.
Fig. 54 Replacing parts
40
6. EXPANSION VESSEL
B Drain the appliance.
6.1 Remove locking screw (D).
6.2 Undo the union connection (E) at the bottom of the expansion
vessel.
B Remove expansion vessel from boiler.
B Set the pressure of the new vessel to that required by the system.
5.
D
3.
4.
6.1 6.2
E
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