Burner Housing, Burner/ Gasket; Heat Exchanger - Worcester Greenstar CDi Compact Installation, Commissioning And Servicing Instructions

SERVICE AND SPARES
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Fig. 98 Electrode assembly

6.8.13 BURNER HOUSING, BURNER/ GASKET

The front two bolts retaining the burner housing are NOT
captive and will drop out when the nuts are removed.
To remove the burner housing.
1. Release and remove the four spring pins from the castellated nuts.
2. Undo the front two castellated nuts/springs and remove and retain
along with the front two bolts (1).
Slacken the two rear castellated nuts/springs, but do not remove.
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Fig. 99 Burner housing
3. Pull the burner housing up and forward to remove.
To remove the burner and gasket.
1. Lift the gasket (1) and burner mesh (2) from the heat exchanger body.
▶ When fitting the burner, ensure that the convex side of the burner
faces down into the heat exchanger.
▶ Always fit a new gasket (1) when re-assembling the heat exchanger.
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Fig. 100 Burner and gasket

6.8.14 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. 101 Heat exchanger disconnection
HEAT EXCHANGER REMOVAL
▶ Ensure any electrical wires or connectors are removed.
▶ Remove the Auto air vent (refer to section 6.8.7) 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.
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6 720 803 800 (2012/11)