Protection Against Lime Scale; Frost Protection; Summer Time And Winter Time; Battery Change Display - Honeywell HR 40 Montage- Und Bedienungsanleitung

Protection against lime scale

The heating valve is opened automatically every Saturday between 10:00
and 12:00 hrs and then closed again, irrespective of the current operating
mode (automatic or manual operation).
During this procedure the display changes from to .

Frost protection

If the temperature falls below 6 °C, the HR 40 opens the radiator valve until
the temperature climbs back above 8 °C. In this way the HR 40 prevents the
radiator from freezing up.
The symbol starts flashing once frost protection kicks in.
Note: Frost protection will only function when the batteries are not flat and the
control unit is inserted.

Summer time and winter time

The HR 40 will switch to summer or winter time automatically.

Battery change display

When it becomes necessary to change the batteries this will be indicated by
the display (see page 28).
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