Boiler Frost Protection; Setting The Hot Water Temperature - Worcester GREENSTAR i SYSTEM User Manual

3.1.2 BOILER FROST PROTECTION

If the temperature within the boiler falls below 8°C the pump will run to circulate water and prevent
the system freezing.
If the temperature within the boiler falls below 5°C the boiler will fire periodically, bringing the boiler
temperature up to 12°C to avoid the possibility of the system freezing.
This process will be repeated until such time that the boiler temperature does not drop below 5°C.

3.1.3 SETTING THE HOT WATER TEMPERATURE

Optional integral diverter valve kit with cylinder temperature sensor is required to be able
to set the hot water temperature.
Otherwise the temperature is factory set to approximately 55°C.
1. Turn the hot water temperature control knob to the desired level.
2. The Eco button is non operational with this type of boiler.
Fig. 4 Hot water temperature
4
3
5
2
1
6
max
6 720 644 864a (2010/10)
2.
4
3
e
2
1.
1
min max
6720644864-01.1Wo
CONTROLS
reset
eco
6
9