Symbols On The Display; Adjusting The Appliance Flow Temperature; Setting The Flow Temperature; Setting The Dhw Heating - Worcester Greenstar 4000 User Instructions

Operation
4.3

Symbols on the display

Symbol Explanation
Connection with the Wi-Fi network (only available with
accessories)
Connection with Radio Frequency (RF) transmitter, e.g.
Comfort+ I RF room thermostat (only available with Key
accessories)
Central heating adjustment
On: Heating is on.
auto: Heating is switched on and off according to
programmed times for heating.
Once: Move to the next on or off time and directly switch on
or off heating.
Off: Heating is off.
Central heating off
Domestic Hot water adjustment
On: Hot water preheat is on
1)
auto : Hot water is switched on and off according to
programmed times for hot water.
1)
Once : Hot water heating on, from the first programmed
switched-on time to the last programmed switch-off time.
Off (eco): Hot water preheat off (boiler in eco mode)
Hot water off
Displays with the appliance status code and diagnostic
code during a fault condition.
Cleaning mode, locks the screen for 15 seconds to enable
cleaning.
Central heating or hot water can be switched either
permanently on or off.
Energy consumption
- Gas consumption
kWh
1) This feature is available the timer Key accessories
2) Domestic Hot Water temperature and adjustment is only available if an optional
integral diverter valve kit is fitted
3) The displayed energy values are estimated based on the internal data of the
appliance. Under real conditions many factors influence the energy consumption
and the displayed energy values differ from the energy values of an energy meter.
The energy values are for information and should not be used for billing
purposes. The energy values can be used to compare the energy consumption
between different days / weeks / months.
Table 4 Symbols on the display
The heating and hot water system has been set up by the installer to its
optimum settings.
▶ It is advised to make a note of these settings before adjusting so that
you can return to these optimum settings in the future.
4.4

Adjusting the appliance flow temperature

4.4.1

Setting the flow temperature

With underfloor heating systems observe the maximum permissible flow
temperature.
10
1)
2)
3)
The maximum flow temperature can be adjusted between 30 °C
1)
and 82 °C .
▶ Press the ( key.
The set maximum flow temperature appears.
▶ Press the  or  keys to set the desired maximum flow temperature.
Flow temperature
Approx. 50 °C
1)
Approx. 70 °C
1) In certain cases, for example, where radiators are undersized or homes are
poorly insulated higher flow temperatures may be required, however, please
refer to the relevant scalding risk advice in this manual.
Table 5 Maximum flow temperature
▶ The setting is saved automatically after two seconds.
Then the symbol is briefly displayed.
Heating On/Off
▶ Press the ( key.
The set maximum flow temperature appears.
▶ Where a Comfort+ or Comfort+ I RF timer key is fitted the Central
Heating can be turned on with the ok key during an off period
4.5

Setting the DHW heating

Hot water functions are only available when an optional integral diverter
valve kit is fitted.
Setting the DHW temperature
▶ Press the * key.
The set DHW temperature appears.
▶ To set the desired DHW temperature, press the  or  keys.
▶ The setting is saved automatically after two seconds.
Then the symbol is briefly displayed.
Hot water mode
The hot water temperature can be set between 35 °C and 60 °C.
▶ Press the * key.
The set hot water temperature appears.
▶ To set the desired hot water temperature, press the  or  keys.
The setting will be saved after 5s or after pressing the ok key.
eco key
In eco mode the appliance will heat the cylinder if the temperature is
approximately 12 °C below the set temperature. Eco mode is enabled by
default, during the initial appliance start up.
In Preheat mode the appliance will heat the cylinder if the temperature
is approximately 6 °C below the set temperature. The appliance heats
the cylinder more frequently. This tops up the cylinder temperature for
quicker heat up times, this is useful for large/longer demand periods.
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.
1) The maximum value can be reduced by the service technician.
Greenstar 4000 – 6 720 891 171 (2020/09)
Sample application
Underfloor heating system
Radiator heating system