5
3
OPERATION
After installation, the DLC-PDC will need to be properly calibrated if it was not ordered with pre-
calibrated setpoints from the factory. In order to better understand the calibration procedures, a
familiarity of the DLC-
PDC controller’s parts and operating principles would be useful. Therefore, this
section will describe in detail the various indicator LEDs, switch functions, control options, and
sequence of operations.
3.1
High Level Setpoint and LED Indicator
The top trimpot labeled “OFF” (see Figure 2) sets the High Level Setpoint which is the level
commonly set for dawn. As the sun rises, the DLC-PDC will switch on both the relay and upper LED
signifying that the lighting will be switched off. This setup is typical for most applications. Note that
while the daylight is increasing the Low Level LED will illuminate, but this will be disregarded by the
controller.
Figure 2: DLC-PDC Controller with Placard