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Worcester-Bosch Greenstar 8000 Style GR8700iW Seite 9

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Operating the appliance
9
Greenstar 8000 Style – 6720883871 (2021/05)
4.3 Adjusting the appliance flow temperature
4.3.1 Heating key
WARNING
Risk of scalding!
▶ This appliance is supplied with the CH control set at approximately
65 °C, a temperature that should be suitable for most installations
that comply with current building regulations. When the boiler
switches from CH to DHW, the temperature of the hot water may
briefly exceed the DHW set point if the CH temperature is set higher
than the DHW temperature. If the CH temperature is changed to
above 65 °C, it is advisable to fit a thermostatic mixing valve (TMV) at
the point of use (e.g. before the bath hot tap or shower) to protect
vulnerable people from scalding.
The heating key is used to set the max. flow temperature. The maximum
flow temperature can be set between 30 °C and 88 °C1). The current
flow temperature is shown on the display.
With underfloor heating systems observe the maximum permissible flow
temperature.
▶ Press the ( key.
The set maximum flow temperature appears.
▶ Press the or keys to set the desired maximum flow temperature.
Table 4 Maximum flow temperature
▶ To save the setting, press the ok key or wait for 2 seconds.
The symbol appears for a short time.
If a time program is activated and set on auto press the ok key to switch
to Advance. Time programs are available with heating key (accessories).
auto: Heating is switched on and off according to programmed times for
heating.
Advance: Switch to Advance to move to the next on or off time and
directly switch on or off heating.
4.4 Hot water mode
4.4.1 Hot water key
WARNING
Risk of scalding!
▶ This appliance is supplied with the CH control set at approximately
65 °C, a temperature that should be suitable for most installations
that comply with current building regulations. When the boiler
switches from CH to DHW, the temperature of the hot water may
briefly exceed the DHW set point if the CH temperature is set higher
than the DHW temperature. If the CH temperature is changed to
above 65 °C, it is advisable to fit a thermostatic mixing valve (TMV) at
the point of use (e.g. before the bath hot tap or shower) to protect
vulnerable people from scalding.
▶ Press the * key.
The set hot water temperature appears.
▶ To set the desired hot water temperature, press the or keys.
▶ To save the setting, press the ok key or wait for 2 seconds.
The symbol appears for a short time.
If DHW preheat is On, 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.
Available with Key (accessories): If DHW preheat is on Auto, press the
ok key to switch between auto and Advance.
Auto: Hot water preheating is enabled during programmed times for hot
water. The appliance is continually maintained at the set temperature.
Advance: Switch to Advance to move to the next on or off time and
directly switch on hot water preheating.
4.5 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.
1) The maximum value can be reduced by the service technician.
Supply temperature Sample application
Approx. 50 °C Underfloor heating system
Approx. 65 °C1)
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
Radiator heating system
… 9 …

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