Shutdown; Setting Frost Protection; Anti-Seize Protection; Settings In The Service Menu - Worcester Greenstar 2000 Installation And Maintenance Instructions Manual

7

Shutdown

7.1

Setting frost protection

NOTICE
Risk of damage to the system from frost!
The heating system can freeze up after a prolonged period (e.g. during a
power failure, switching off the power supply, faulty fuel supply, boiler
fault etc.).
▶ Ensure that the heating system is in constant use (particularly when
there is a risk of frost).
Frost protection for the heating system:
Always follow the latest advice in BS7593 for system frost protection.
Frost protection for the heating system is only ensured if the heating
pump is operational and is pumping heating water through the entire
system.
▶ Leave the heating switched on.
▶ Set the time control to constant ON and set the room thermostat to
12 °C.
-or- If you want to leave the appliance switched off:
▶ Mix Worcester-approved anti-freeze into the heating water (
"Water treatment products", page 34) and drain the DHW circuit.
For further information, see the heating controller operating
instructions.
Appliance frost protection:
The appliance frost protection function switches the burner and heating
pump on when the appliance temperature falls below 5 °C. This prevents
the appliance from freezing.
7.2

Anti-seize protection

This function prevents the heating pump and the diverter valve seizing up
following long periods of inactivity.
The anti-seizing function remains active during standby mode.
The pump is briefly activated automatically after 24 hours of inactivity.
Greenstar 2000 – 6 721 820 552 (2021/02)
8

Settings in the service menu

Many appliance functions can be set and checked in the service menu. It
includes:
• Menu 1: information menu
• Menu 2: not used in UK/IE
• Menu 3: factory settings
• Menu 4: special features
• Menu 5: limit values
• Menu 6: function checks
• Menu 0: manual operation
8.1

Operating the service menu

Selecting and setting the service function
If a key is not pressed for 30 minutes, the system exits the selected
service function automatically.
▶ To select a service function, press arrow key  or .
The display shows the service function.
▶ To confirm the selection: press OK key.
The current setting starts to flash.
▶ To change the setting: press arrow key  or .
▶ To save: press OK key.
-or-
▶ If you do not want to save the setting: press " key.
The value currently set is displayed.
▶ Press the " key.
The service function is displayed.
▶ Press " key again.
The higher level menu is displayed.
▶ Press " key again.
The device reverts to normal operation.
Documenting the settings
▶ Record the change the settings in the commissioning report
( Section 13.6).
Settings in the service menu
Many appliance functions can be set and checked in the service menu.
Opening the service menu
▶ Press the DHW key and the Heating key simultaneously until the
service menu appears.
Closing the service menu
▶ Press the DHW key or the Heating key.
-or-
▶ Press the " key.
Navigating through the menu
▶ To highlight a menu or a menu item, press the  key or the key.
▶ Press OK key.
The menu or the menu item is displayed.
▶ To return to the next higher menu level, press the " key.
Changing the settings values
▶ Select the menu item with the OK key.
▶ To select the desired value, press the  key or the key.
The new value will be saved after 5s or after pressing the OK key.
Exiting the menu item without saving values
▶ Press the " key.
The value is not saved.
Shutdown
53