Setting The Air/Gas Ratio - Worcester Greenstar 8000 Life Installation And Maintenance Instructions Manual

Inspection and maintenance
▶ Align the new gasket correctly with the condensate trap.
Fig. 97 Aligning the new gasket with the condensate trap
▶ Press on the gasket in the required order.
When the gasket is correctly inserted, the pin is visible in the recess
and is flush with the top edge of the gasket.
Fig. 98 Pressing on the gasket
▶ Check the condensate hose and clean if required.
▶ Fill the condensate trap with approx. 250 ml water.
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▶ Replace the condensate trap. An audible click will indicate locking.
Ensure condensate trap is secured correctly.
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Fig. 99
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Setting the air/gas ratio

NOTICE
Setting the air/gas ratio
▶ 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.
NOTICE
Combustion testing
▶ The setting of the air/gas ratio must be carried out by a competent
registered gas engineer, such as a Gas Safe registered engineer or
British Gas engineer.
▶ Setting of the air/gas ratio must not be attempted unless the person
carrying out the test is equipped with a flue gas analyser conforming
to BS7927 and is competent in its use.
All CO/CO readings must be taken with the combustion chamber cover
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ON. Adjustments can only be made with the cover off.
CO should be measured 10 minutes after firing the appliance.
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Greenstar 8000 Life – 6720883865 (2021/11)
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