Chimney Sweep Mode; Combustion Casing Removal; Checking Gas Inlet Pressure; Checking The Gas Supply Pressure - Worcester Greenstar 8000 Life Installation And Maintenance Instructions Manual

6.4

Chimney sweep mode

You have 15 minutes to take your measurements or to make your
settings. After this time the appliance returns to normal operation. When
running in the chimney sweep mode, the appliance will operate both the
central heating and the domestic hot water circuits. This is to allow
sufficient time for this part of the commissioning procedure. It will be
necessary to run water through the domestic hot water circuit to ensure
that the appliance will not overheat whilst in chimney sweep mode.
In chimney sweep mode the rated output of the appliance can be
selected.
▶ Press the ok key until the countdown is completed and the symbol
appears.
▶ Set the desired rated output min and max using the  or the  keys.
The value is accepted after 2 seconds.
▶ To exit the chimney sweep mode, press the d key.
Adjustment with casing removed in chimney sweep mode
1. Set the chimney sweep mode and start up the appliance at maximum
rated output.
2. Set the chimney sweep mode and set the appliance at minimum rated
output.
6.5

Combustion casing removal

▶ Remove the combustion cover.
Fig. 68 Removing the combustion cover
Greenstar 8000 Life – 6720883865 (2021/11)
2.
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6.6

Checking gas inlet pressure

6.6.1

Checking the gas supply pressure

▶ Switch off the appliance and close the gas isolator.
▶ Unscrew the screw on the test point for the gas supply pressure and
connect a pressure gauge.
T10
Fig. 69 Gas valve test points (above: SIT valve, below: Honeywell valve)
▶ Open the gas isolator and switch on the appliance.
▶ Ensure that there is heat transfer by opening the radiator valves and
zone valves.
▶ Set the chimney sweep mode and start up the appliance at maximum
rated output.
▶ Check the required gas supply pressure according to table 16.
Commissioning must not take place outside of the permissible pressure
range.
▶ Identify the cause and rectify the fault.
▶ If this is not possible: isolate the appliance on the gas side and notify
the gas supplier.
▶ Exit the chimney sweep mode.
▶ Switch off the appliance, close the gas isolator, remove the pressure
gauge and tighten the screw.
Commissioning
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