Worcester Greenstar 8000 Life Installation And Maintenance Instructions Manual page 55

Menu 2 (L.2): Hydraulic settings
▶ Press the ( key and * key at the same time, until L.A is displayed.
▶ Keep pressing the  key, until L.2 is displayed.
▶ To confirm the selection: Press the ok key.
▶ Select and set the service function.
Service function L.2
2-A1 Low-loss header
2-A3 Hydraulic configuration for heating
circuit 1
Table 21 Menu 2: Hydraulic settings
Menu 3 (L.3): Basic settings
▶ Press the ( key and * key at the same time, until L.A is displayed.
▶ Keep pressing the  key, until L.3 is displayed.
▶ To confirm the selection: Press the ok key.
▶ Select and set the service function.
Service function L.3
3-b1 Maximum heat output (range rating)
3-b2 Standby time
3-b3 Temperature interval for switching off
the burner and switching it on again
3-C4 Turbine signal delay
3-C5 DHW start delay
3-C6 Preheat
3-C8 Thermal disinfection
Greenstar 8000 Life – 6720883865 (2021/11)
The basic settings are depicted as highlighted in the following table.
Settings/adjustment range
• 0: No low-loss header present
• 1: Temperature sensor connected at the
appliance
• 2: Low-loss header connected to the module
• 3: Low-loss header without temperature sensor
• 0: No independent heating pump installed
• 2: Heating pump after low-loss header
The basic functions are depicted as highlighted in the following table.
Settings/adjustment range
• 30 kW: 50... 55*... 100 %
• 35 kW: 50... 58*... 100 %
• 40 kW: 42... 49*... 84 %
• 45 kW: 40... 47*... 79 %
• 50 kW: 35... 42*... 70 %
• 3... 5... 60 min
• ‒15 .. ‒6... ‒2 K ( °C)
• 2... 16 × 0.25 s
• 0 (not active)... 50 s
• 0... 1... 30 min
• OFF
• ON
Settings in the service menu
Remark/restriction
This setting defines, where the temperature
sensor for the low-loss header is connected.
Remark/restriction
Maximum released heating output [%]. Reducing
the output increases the efficiency and reduces
NO emissions.
x
▶ Measure the gas rate.
▶ Compare measured result with the setting
tables ( page 84 and page 88).
▶ Correct deviations.
The time interval determines the minimum delay
between starting and restarting the boiler.
If an outside temperature-controlled heating
controller is connected, this setting is optimised
by the heating controller.
Difference between current flow temperature and
set flow temperature up to the point when the
burner is switched on.
If an outside temperature-controlled heating
controller is connected, this setting is optimised
by the heating controller.
The delay prevents sudden changes in the water
supply pressure from causing the burner to briefly
operate although no water is drawn off
The delay concerns heating operation in systems
in which the DHW outlet of the solar-heated DHW
cylinder is connected to the cold water inlet of a
combi boiler. DHW heating by the combi boiler will
be suppressed expecting that solar thermal DHW
will reach the hot water temperature sensor prior
eliminating the need to run the boiler. This avoids
unnecessary operation of the combi boiler. Set the
heating delay in accordance with system
conditions.
The heating mode is disabled for this period of
time following DHW heating.
When Thermal Disinfection is activated: Water will
be heated up to 70 °C for the duration of
10 minutes, when domestic hot water is extracted.
Thermal Disinfection will be completed after
10 minutes or after a domestic hot water
extraction of 3 minutes.
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