3.1.3 Boiler Frost Protection; Turning The Central Heating Off During; The Summer; Setting The Flow Temperature For Domestic Hot Water System - Worcester Greenstar CDi Compact ErP User Instructions

3.1.3 Boiler frost protection

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 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.
3.1.4 Turning the central heating off during the summer
Do not switch the appliance off at the mains fused spur.
▶ Turn your programmer/timer to the off position.
▶ Please refer to the programmer/timer manufacturer's instructions.

3.1.5 Setting the flow temperature for domestic hot water system

1. Turn the hot water temperature control knob to the desired level between 40 and 60°C, this will be shown on the digital display.
The value is displayed during this process, press
default screen.

3.1.6 Domestic hot water eco and preheat modes

• Eco mode is an energy saving feature which disables the Preheat function. Eco is enabled by default, during the initial appliance
start up and Eco is displayed.
• Preheat mode, the hot water heat exchanger is kept pre-heated to reduce the time taken to deliver hot water at the tap.
In the Preheat mode, if there has been no demand for hot water for 24 hours the appliance will save energy by suspending Preheat
until there is a demand for hot water. At this time Preheat mode is re-activated. It is advised to use a twin channel programmer to
time the Preheat function and switch it off when it is not needed.
Greenstar CDi Compact - 6 720 813 277 (2014/09)
ErP
eco
reset
°C
°F
ok
to exit or after five seconds of inactivity the boiler display will return to the
°C
ok
°F
Eco
e
min max
Controls
2
1 1
3
0 4
bar
min max
1.
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