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Operation
Greenstar 4000 – 6 720 891 170 (2020/09)
12
Setting preheat mode or eco mode
Press the ok key to switch between Eco/Preheat.
In Preheat mode, the hot water heat exchanger is kept pre-heated to
reduce the time taken to deliver hot water at the tap.
Eco mode is an energy saving feature which disables the Preheat
function. Eco mode is enabled by default, during the initial appliance
start up.
4.6 Setting the heating control device
Observe the operating instructions of the heating controller. This shows
you:
how to set the room temperature.
how to heat economically and save energy.
Heating/DHW via time program (Key control accessories)
Time programs are available with Key control accessories fitted. If a time
program is available and the heating/DHW mode is set on Auto press the
ok key to select Once.
Auto: Heating/DHW mode is switched on and off according to
programmed times.
Once: Switch to Once to move to the next central heating/DHW on or off
time.
4.7 Operating the menu
Opening and closing the menu
To open the menu, press the key.
To exit the menu, press the key again.
-or-
Press the d key.
Changing the setting values
To highlight a menu item, press the key or the key.
Select the menu item with the ok key.
To change the value, press the or key.
Press the ok key.
The new value is saved.
Exiting the menu without saving values
Press the d key.
4.8 Settings in the menu
The factory settings are highlighted in the following table.
Table 6 Settings Menu
Menu item Function definition
Heating mode1) On
Auto: Activate time program.
Once: Heating is on from the first programmed on time
to the last programmed off time without off periods.
•Off
Heat. time prog.1) Timer for heating: Weekday(s) selection, day program and
timer adjustment (5.1 "Setting the time program",
page 13).
DHW preheat On
•Auto
1)
•Once
1)
Off
DHW time prog.1) Timer for hot water: Weekday(s) selection, day program
and timer adjustment (5.1 "Setting the time program",
page 13).1)
Boiler status Current system values including the pressure indicator.
Information The current system values and the active operating
conditions can be called up in the Information menu.
Changes are not possible.
System pressure
Hot water Temp. (DHW temperature)
Weather comp. (where fitted)
System Fill (automatic filling) 2)
Key (Type of installed key is shown, e.g. "Comfort + RF
Key")
Internet connect.
Energy consump. Display Gas consumption
•Last 24h
•Last 30 days
Settings Time: Set the current time.1)
Date: Set the current date.1)
DST: enable automatic time shift change summer/
winter time
•Parental lock
–On
Off
•Display
Switch off after: Set the time after which the
display is switched off.
Brightness: Set the display brightness.
Key illum. (Key illumination)
Language: Change the language of the menu and the
menu items.
•Units
1)
Cleaning funct. Boiler keypad is disabled for 15 seconds.
Emergency mode3) On: Set the desired heating flow temperature by
pressing back or menu key after selecting On.
Off
Start filling2) •On
Are you sure there is no leak in your heating
system?
–Cancel now?
Start filling
Off
1) Only available with installed Key (accessories)
2) Only available with automatic filling facility (accessory)
3) Allows manual control of heating during loss of Radio Frequency (RF) Key signal
Menu item Function definition
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