29
Overview of installer selectable features which
may aff ect the operation of your thermostat
Temperature range limitation
This allows the installer to programme both upper and lower
temperature limits. It may limit the upper and lower temperature that
you are able to set on the thermostat.
Temperature override limitation
This allows the installer to limit the number of degrees that you can
override the programmed temperature by, it also allows the installer
to set rules regarding how long a temperature override will remain in
place.
Keyboard lock
This allows the installer to limit or lock the keyboard to prevent
unauthorised changes to programme values and limits overrides.
What happens to the unit when batteries fail
If batteries are not changed within 15 days of a low battery warning,
the unit shuts down. In normal circumstances the thermostat turns off
the valve or the boiler it is controlling. In extreme climates turning off
the heating is likely to result in the building freezing up. To prevent this,
the installer can set up the unit to turn the heating
ON
rather than turn
OFF
on battery failure. This will consume more fuel but will prevent
damage occurring to the building. If appropriate please check that the
installer has set this function correctly.
Please note: If you replace the batteries and the LCD does not come
on immediately please check battery orientation. Do not leave
batteries in the product if the display is not active.
If, after changing the batteries, the screen remains blank it is
necessary to carry out a partial reset. See page 30 for details.
U
ser Instruc
tions
GB
