Checking The Flue Integrity; Cleaning The Siphon And Heat Exchanger; Checking The Burner - Worcester Greenstar 8000 Life Installation And Maintenance Instructions Manual

The gas valve and venturi are factory set and should not need to be
adjusted, if found to be out of tolerance and when all other possible
causes have been checked, please contact the Worcester Bosch Group
Helpline 0330 123 3366.
8.8

Checking the flue integrity

NOTICE
▶ Check flue joints are secure, the terminal and the terminal guard, if
fitted are clear and undamaged.
▶ Combustion testing must be carried out to BS 7967 by a competent
person. Testing must not be attempted unless the person carrying
out the combustion check is equipped with a calibrated Combustion
Analyser conforming to BS EN 50379 and is competent in its use.
Flue gas analysis
▶ Ensure that the gas inlet pressure has been checked and is
satisfactory.
▶ Refit the test point plugs after the test has been completed.
▶ Refer to chapter 6.10 "Checking flue integrity" and check that the
readings conform to those given, confirming flue system and
combustion circuit are ok.
8.9

Cleaning the siphon and heat exchanger

WARNING
Gaskets and seals - gas related components
▶ Burner/electrode assembly gasket must be replaced if disturbed.
▶ Other gaskets/seals must be checked and replaced where necessary.
▶ Do not attempt the cleaning procedure unless new gaskets and seals
are available.
There is an optional tool available to assist in cleaning the heat
exchanger, part number 7 719 001 996.
Greenstar 8000 Life – 6720883865 (2021/11)
8.9.1

Checking the burner

▶ Remove the combustion cover ( Fig. 68).
▶ Remove the burner cover.
1.
1
Fig. 81 Removing the burner cover
▶ Remove the burner and clean its components.
Fig. 82 Burner
▶ Reinstall the burner in reverse order, including a new gasket.
The GR8300iW 45 and 50 appliances have a different gasket with coded
pin.
Inspection and maintenance
? ?
1. 1. 1.
2.
0010033962-002
0010023603-002
63