Daylight Harvesting Applications; Daylighting Control Override; Closed Loop Control - ETC echoflex ELED3 Configuration Manual

Daylight Harvesting Applications

Based on the ambient light level in the space, the controller modulates light intensity from
lighting fixtures on the primary and secondary daylighting channels, Channel 1 and 2
respectively. The daylight harvesting application does not affect the relay operation.
When daylighting is active and is driving the two outputs, a switch, gateway command or
occupancy sensor cannot force the light level higher. However, a switch, occupancy sensor, or
gateway command can override the light OFF or dim to a level below the daylighting control
value.
The fixtures closest to the natural light source must be connected to Channel 1, the primary
daylighting channel. If the space has a secondary daylighting zone, the fixtures in the zone
must be connected to Channel 2, the secondary daylighting channel. Channel 3 does not
perform any daylighting routine.
Note:
Daylight harvesting does not affect the operation of wall switches or occupancy sensors when
the light is ON. If the light is ON, either a switch or occupancy sensor can override with an OFF
action or dim to below the daylighting control value. See

Daylighting Control Override

The open or closed loop daylighting features can be temporarily overridden by enabling the
daylighting manual override parameter. The override has a timer that releases the override
once expired and daylighting control resumes.
If the override is enabled, a switch can turn lights ON and manually set the dimming level.
Garibaldi Pro software is required to configure both the daylighting manual override timer and
daylighting manual override enable parameters.

Closed Loop Control

Closed loop daylighting becomes active when a photo sensor with a maximum detectable
range of light less than 2500 lux is linked to the controller. In closed loop daylighting, the
sensor indirectly monitors the controlled light output from the fixtures plus some of the
natural light contribution.
When the lights are on, closed loop daylighting tries to maintain a given set point level within
the space. This level is specified in the closed loop daylighting set point parameter. The
controller only adjusts the dimming output on received photo sensor messages and only when
the light is ON. If the light is OFF, closed loop daylighting is ignored.
To set the closed loop daylighting set point using Simple Tap, a photo sensor with monitoring
range less than 2500 lux and a switch must be linked to the controller.
Note:
close the blinds or complete this step at night.
1. Turn the light ON.
2. Use a handheld photometer to measure the light on the task plane and press the fixture's
switch to adjust its light level until it matches the target light level.
Daylight Harvesting Applications
The controller only supports one linked photo sensor.
This process is best performed when there is little or no natural light; either
Photo Inhibit on page 1.
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