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What is a programmer?
... an explanation for householders.
Programmers allow you to set ‘On’ and ‘Off’ time periods.
Some models switch the central heating and domestic
hot water on and off at the same time, while others allow
the domestic hot water and heating to come on and go
off at different times.
Set the ‘On’ and ‘Off’ time periods to suit your own lifestyle.
On some programmers you must also set whether you
want the heating and hot water to run continuously, run
under the chosen ‘On’ and ‘Off’ heating periods, or be
permanently off.
The time on the programmer must be correct. Some
types have to be adjusted in spring and autumn at the
changes between Greenwich Mean Time and British
Summer Time.
You may be able to temporarily adjust the heating
programme, for example, ‘Override’, ‘Advance’ or ‘Boost’.
These are explained in the manufacturer’s instructions.
The heating will not work if the room thermostat has
switched the heating off. And, if you have a hot-water
cylinder, the water heating will not work if the cylinder
thermostat detects that the hot water has reached the
correct temperature.
The text below has been edited and approved by the
Plain English Campaign, who has issued a Crystal Mark
to be displayed with it.
What is a programmer?
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