Eco Mode; Frost Protection - Bosch GREENSTAR HEATSLAVE II EXTERNAL 12/18 User Instructions & Customer Care Manual

OPERATING THE BOILER
DOMESTIC HOT WATER ECO MODE:
Eco mode is an energy saving feature which alters the cycling function of the burner for heating the
heat store tank. In normal operation the burner will fire more frequently between demands in order to
maintain a stored temperature close to the hot water set point you have entered. In Eco mode, the
burner fires less frequently between demands meaning that the heat store temperature is maintained
at a lower average level, but the tank set point remains the same.
By selecting Eco mode you will be using less energy as the tank is allowed to cool a little more
before reheating to the set point.
SELECTING ECO MODE:
1. Press and hold for at least four seconds to enter the energy saving Eco mode, when Eco
mode is active, "Eco" will be displayed.
EXIT ECO MODE:
4To exit ECO mode, press and hold

FROST PROTECTION:

4 The boiler has built in frost protection to protect the boiler, the boiler must have power for this
to operate.
4 If you are leaving the property unoccupied during cold weather, please leave your programmer
on constant and your room thermostat set to 15°C.
4 If the temperature within the boiler falls below 8°C the pump will run to circulate water and
prevent the system freezing.
4 If the temperature within the boiler falls below 4.5°C the boiler will fire immediately, bringing the
boiler temperature up to 12°C to avoid the possibility of the system freezing.
4 This process will be repeated until such time that the boiler temperature does not drop below
4.5°C.
If there is no hot water or heating, check page 8 and 10 for fault condition guidance.
GREENSTAR HEATSLAVE II EXTERNAL 12/18, 18/25 & 25/32
6 720 805 212a (07.2013)
for at least four seconds, 'Eco' will disappear.
OPERATING THE BOILER
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