Chimney Sweep Mode; Setting The Appliance To Maximum; Setting The Appliance To Minimum; Exiting Chimney Sweep Mode - Worcester Greenstar 2000 Installation And Maintenance Instructions Manual

Commissioning
6.5

Chimney sweep mode

You have 30 minutes to take your measurements or to check or adjust the
appliance settings. After this time the appliance returns to normal
operation.
Whilst the appliance is in chimney sweep mode, the chimney sweep
symbol ( C ) will be displayed on the screen.
6.5.1

Setting the appliance to maximum

Maximum output mode
▶ A hot water outlet can be opened to prevent the appliance from
shutting down due to high temperature during testing.
▶ Press the ok button for at least 5 seconds.
– The appliance enters chimney sweep mode and automatically
enters maximum output.
– The display shows the maximum percentage of the power 100%
alternating with the flow temperature.
– The appliance will ramp up to maximum output in approximately
30 to 35 seconds.
6.5.2

Setting the appliance to minimum

Whilst the appliance is already in chimney sweep mode - maximum
output.
▶ Press the  button to set the appliance to minimum output.
– The display shows the minimum percentage of the power
alternating with the flow temperature.
– The appliance will take approximately 30 to 35 seconds to ramp
down to minimum output.
– Allow the appliance to stabilise at minimum output.
6.5.3

Exiting chimney sweep mode

To exit the chimney sweep mode:
▶ Press the ok button and the appliance will return to normal operation.
– If left in the chimney sweep mode the control will return to normal
operation after 30 minutes.
48
6.6

Checking gas inlet pressure

Measuring the inlet pressure
▶ Switch off the appliance and close the gas isolator.
▶ Unscrew the screw on the test nipple for the gas supply pressure and
connect a pressure gauge.
1
Fig. 63 Checking the gas supply pressure (above: SIT valve, below:
Honeywell valves)
[1] Gas valve - NG
[2] Gas valve - LPG
▶ Open the gas isolator and switch on the appliance.
▶ Ensure that there is heat transfer by opening the radiator valves and
any zone valves fitted. A hot water tap can also be opened for
additional heat transfer.
▶ Set the appliance running at maximum output in chimney sweep
mode ( 6.5 "Chimney sweep mode").
▶ Check the required gas supply pressure according to following
section "Gas pressure within the system".
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 device on the gas side and notify the
gas supplier.
▶ Exit the chimney sweep mode.
▶ Switch off the device, close the gas isolator, remove the pressure
gauge and tighten the screw.
▶ Refit the casing.
Greenstar 2000 – 6 721 820 552 (2021/02)
2
T10
0010035320-001