User Manual

67
AUTOMATIC CONTROL
5 LIGHTING CONTROL BT Reason for energy savings
5.2 Light level / Daylight control (daylight harvesting)
Artificial lighting can be reduced as the incoming
daylight increases, thus saving energy.
0
Manual central
Luminaires are controlled centrally; there is no
manual switch in the room/zone.
Luminaires will be manually adjusted from a
central point when the day light level becomes
too low. However, the luminaires often will not
be reduced when the day light is at a sufficient
level (sub optimal).
1
Manual
Luminaires can be switched off with a manual
switch in the room.
As in 0), but in addition the luminaires can be
switched off manually in each room (increased
local interaction possibilities). However, also with
this setup, the luminaires often will not be turned
off when the day light is at a sufficient level (sub
optimal).
2
Automatic switching
The luminaires are automatically switched off
when more than enough daylight is present to
fully provide minimum illuminance required and
switched on when there is not enough daylight.
With a sufficient day light level the luminaires will
be switched off which eliminates the
disadvantages of 0) and 1). Automatically
switching on guarantees sufficient lighting.
3
Automatic dimming
The luminaires are dimmed down and finally fully
switched off when daylight is available. The
luminaires will be switched on again and dimmed
up if the amount of daylight is decreasing.
3
Automatically supplemented lighting to the
incoming daylight always ensures that there is
sufficient lighting at minimum energy.