Heat Exchanger; Diverter Valve Motor And Diverter Valve Removal - Bosch Worcester Greenstar CDi Compact ErP Series Installation, Commissioning And Servicing Instruction

7.8.15 Heat exchanger

Before removal:
▶ Isolate the electrical power to the boiler.
▶ Drain the boiler.
Heat exchanger disconnection
1. Undo the flow and return connections.
2. Pull both the flow and return pipes away from the heat exchanger.
▶ Replace the fibre washers (1) when replacing the heat exchanger.
1.
Fig. 100 Heat exchanger disconnection
Heat exchanger removal
▶ Ensure any electrical wires or connectors are removed.
▶ Remove the Auto air vent (refer to section 7.8.8) to ease removal of
the heat exchanger
1. Unscrew the heat exchanger retaining nut.
2. Remove the heat exchanger retaining nut.
3. Remove the two screws securing the heat exchanger to the air box.
4. Lift the heat exchanger until the lower connection clears the hole in
the air box.
5. Pull the heat exchanger towards you to remove.
CAUTION: Component replacement:
▶ After replacement of a gas related component,
where a gasket or seal has been disturbed or
replaced, check for gas tightness using a gas sniffer/
analyser.
▶ Also after re-assembly, carry out the following
checks:
Fan pressure in section 7.5,
Flue gas analysis in section 7.6.
▶ Re-assemble in the reverse order.
CDi Compact ErP - 6 720 813 276 (2015/07)
2.
1
Fig. 101 Heat exchanger removal

7.8.16 Diverter valve motor and diverter valve removal

▶ Disconnect the lead from the diverter valve motor.
1. Pull the diverter valve motor from the housing.
2. Undo and remove the two screws from the diverter valve motor
housing.
3. Pull the diverter valve motor housing from the diverter valve
assembly.
Fig. 102 Diverter valve
SERVICE AND SPARES
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5. 5.
4. 4.
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