Fig. 1 and Fig. 2 show the front view and the back view of BRT-803 timer switch respectively.

  The switch has a sound detector and a light detector on the front tuning screws for setting up

  delay-off time and ambient light override on two sides and terminal blocks for wiring on the back.

BRT-803 timer switch only requires both hot wire and neutral wire for installation:

        Hot wire (ACL):          Coming from the power line with 220V;

        Neutral wire (ACN):    Usually coming with the hot wire; and

        Load wires:                  Going to the load.

  Warning: Please make sure power is turned off before starting installation!

  Fig. 3 shows the wiring diagram and Fig. 4 shows the step-by-step installation instructions. There

  are three easy steps:

            Step one:       Use a screwdriver to pry off the front plate in position A;

            Step two:      Wiring according to the diagram and the labelled ports of the switch; and

            Step three:     Install screws and front plate.

 Once properly wired BRT-803 timer switch needs two adjustments for the first time operation: set

  up the delay-off time and set up the ambient light override.

  1.    Adjust the delay-off time

  There is a tuning screw on one side of BRT-803 timer switch. Use a crew driver to tune this screw

  to adjust the delay-off time as shown in Fig. 5. The delay-off time can be set from 10s  to  15

  minutes.

  2.    Adjust the ambient light brightness threshold

  There is a tuning screw on another side of the switch. Use a crew driver to tune this screw to

  adjust the ambient light override threshold brightness as shown in Fig. 6.

  Please note that BRT-803 timer switch needs 2 minute warm-up time before it can work normally.

  And it is recommended that the switch not be used in noisy environment.

  BRT-803 timer switch can be used for automatically turning on and turning off various loads on

  sound triggers. Its high power rating makes it especially suitable for larger loads.