Fig. 1 and Fig. 2 show the front view and the back view of the BRT-780 speed control switch  respectively. It has a rotary control unit on the right and a standard socket on the left. It comes  with a power cord on the back.

When BRT-780 rotary speed control switch is used as a portable device there is no need for  further wiring installation. Once the power cord of BRT-780 is plugged to a wall socket or  extension cord it is ready to go.

When BRT-780 rotary speed control switch is used as a wall mount unit the power cord can be  removed and the unit is directly wired to power lines. Please find Wiring and Installation  instructions as follows.

    There are 5 wiring and installation steps (please refer to in Fig. 3):

              Step one:     Open the switch cover and use a screwdriver to pry off the front plates on   lower edges;

              Step two:     Take off the screws to remove the bottom plate;

              Step three:   Take off the screws pointed by the red arrows to remove the cable clamp and  the power cord that comes with the unit;

              Step four:     Insert the wires into the terminal blocks and tighten the terminal block screws; and

              Step five:      Reverse step 3 2 and 1 to reinstall the cable clamp the bottom plate and   front plates. Finally close the cover.
 

BRT-780 speed control switch is easy to operate. Once it is installed plug the fan’s power cord to the socket of BRT-780.

  1.     Turn on or turn off the fan and adjust fan speed: As shown in Fig. 4a Rotating the  knob clockwise will turn on the fan and rotating the knob clockwise further more will reduce  the fan speed. When the fan is on rotating the knob counter-clockwise will increase the fan  speed and rotating the knob counter-clockwise further more to the “Off” position will turn off   the fan; and

  2.     Set the minimum fan speed limit: As shown in Fig. 4b the minimum fan speed can be  fine-tuned by using a dial on the side of BRT-780 during initial installation. Turn on the fan   and rotate the speed control knob to run the fan at minimum speed. Then rotate the fine-tune  dial to obtain a minimum fan speed as desired.

  Note:      Adjusting the minimum speed is necessary for some motors or the motor may not move  due to too low a driving voltage.

BRT-780 rotary speed control switch can be used for all kinds of appliances driven by motors  such as cooling fans ventilation fans blowers etc. It has wide applications at various locations  such as homes schools laboratories hospitals bars restaurants etc.