Fig. 1 and Fig. 2 show the front view and the back view of the BRT-781 speed control switch  respectively. It has a keypad control unit on the right and a standard socket on the left. It comes  with a power cord on the back.

When BRT-781 keypad speed control switch is used as a portable device there is no need for  further  wiring  installation.  Once  the  power  cord of BRT-781 is plugged to a wall socket or  extension board it is ready to go.

When BRT-781 keypad 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 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-781 keypad control switch is easy to operate. Once it is installed plug the fan’s power cord  to the socket of BRT-781.

Turn on or turn off:   As shown in Fig.4a  pressing  the  keypad  will  turn  on  the  motor at its last  speed  (the  first  time  turn-on  will  be at the highest speed)  and  pressing  again  will  turn  off  the  motor.

Adjust the speed:    Pressing  and  holding  down  the  keypad  will  cycle  the  motor  speed  in  5   different settings from the highest to the lowest then back to the highest. Once the desired speed   is reached release the keypad.

Note:      The number of the lit LED lights indicates the speed of the motor. The more the lit LED  lights the faster the speed.

Adjust the minimum speed:     As shown in Fig.4b the minimum fan speed can be fine-tuned   by using a dial on the side of BRT-781 during initial installation. Turn on the fan and pressing the  keypad to run the fan at the lowest speed. Then rotate the fine-tune dial to obtain a minimum fan   speed as desired.

  Rotating the dial clockwise will reduce motor speed and rotating the dial counter-clockwise will  increase motor speed.

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

BRT-781 keypad 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.