Boiler Frost Protection; No Integral Diverter Valve Fitted: Cylinder Temperature Adjustment; Optional Integral Diverter Valve Kit Fitted: Setting The Cylinder Hot Water Temperature - Worcester Greenstar i System Compact ErP Series User Instructions

3.1.4 Boiler frost protection

NOTICE: The boiler must be switched on with a gas supply in order for the built -in auto frost protection to work as
described.
If you are leaving your property unoccupied during cold weather, please leave your programmer on constant and your room
thermostat set to 15°C.
▶ 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 does not rise to 9°C within 30 minutes of the pump operating, the boiler will fire up to provide heat to
bring the temperature up.
▶ If the temperature within the boiler falls below 5°C the boiler will fire immediately, bringing the boiler temperature up to 15°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.

3.1.5 No Integral diverter valve fitted: Cylinder temperature adjustment

If a heat demand occurs, the radiator and flame symbols will be displayed
If the domestic hot water control is adjusted or the "eco" button is pressed:
▶ N/A is displayed briefly.
▶ This function will not affect the cylinder hot water temperature.
To adjust the water temperature of the cylinder:
▶ Adjust the cylinder temperature thermostat on the cylinder.

3.1.6 Optional integral diverter valve kit fitted: Setting the cylinder hot water temperature.

An internal or external timer/programmer coupled with the optional integral diverter valve kit with cylinder
temperature sensor is required to be able to set the hot water temperature.
If an FR110, FW100 and Sense II controller is also fitted, in conjunction with the diverter valve, they assume control
over the delivered temperatures, reducing the effect of the temperature controls. Set both to maximum.
1. Turn the hot water temperature control knob to the desired level between 40 and 70°C, this will be shown on the digital display.
Fig. 2 Hot water temperature
▶ The tap symbol will be displayed to confirm that the hot water is being adjusted.
▶ After five seconds the boiler display will return to the default screen.
An external timer may be fitted instead of an internal timer.
Greenstar i System ErP - 6 720 813 281 (2014/09)
eco
reset
°C
°F
°C
ok
°F
e
min max
Controls
2
1 1
3
0 4
bar
min max
1.
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