Bosch GREENSTAR II HE OIL 12/22 Service Manual download pdf (Page 22)

14.7 Secondary Heat Exchanger. (See Fig. 30)

Clean the secondary heat exchanger.

Remove the wing nut (4) and heat exchanger cover (5).

Remove each baffle (8), clean and check condition. Use the

brush provided to clean each tube in the heat exchanger (7).

Wash any debris away by flushing with water.

Remove inspection plug (3) at base and clean as necessary.

Replace plug.

Replace baffles and cover, securing with wing nut, ensuring a

good seal is made.

14.8 Fire Valve.

Check that a fire valve is fitted to the incoming oil line with the

body located outside the premises and the detection element

located within the appliance case. Test the operation of the fire

valve to ensure that the mechanism operates and that the oil

supply is completely isolated.

14.9 Recommission the Burner.

1. Connect the flexible oil supply hose to the isolating valve and

tighten sufficently to form a good seal. Where a double pipe

system is being used connect the oil return flexible hose to the

return pipe fitting.

2. Insert the burner into the burner mounting flange. Push the

burner firmly forward to compress the gasket and tighten the

locking nut with a 13mm spanner.

Note: It is important that a good seal is made between the

burner and the boiler to prevent the escape of the gases from

the combustion chamber.

3. Turn on the oil supply at the service cock.

4. Recommission the burner as described in Section 12.

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Bosch GREENSTAR II HE OIL 12/22 Service Manual Page 22