Save money and reduce the headache of trying to find original electrical components for your central vacuum by upgrading to a circuit board in your main central vacuum collection unit. If your relay, transformer, minibreaker or old fashion fuse have gone bad, replace all the electronics with one circuit board. The difficulty level to change the board is "medium" and usually takes an hour. We sell the electrical components for this upgrade here at Central Vacuum Online.



(It is recommended to have a professional perform this procedure.)
  1. WIRING

    1. Unplug the vacuum. Remove all the electronics from the vacuum unit. The relay, transformer, minibreaker, everything except the motor and on/off switch on the side of the unit’s tank (if there is a switch).
    2. Wire the motor and incoming power to the board. You will need 1/4” slat terminal female ends or Disconnects Wire Connectors. Sometimes these ends will already be on the wires that connected to the old components.
      1. “LINE”: Power hot coming in from the power cord (black wire)
      2. “NTL”: Power neutral coming in from the power cord (white)
      3. “MOTOR”: Each vacuum motor will have two connections on the board and both may be labeled “MOTOR”. Since vacuum motors are polar neutral it doesn’t matter which motor wire goes to which motor board connection. There will be two blacks or a black and white wire from the motor to the board. If the motor has a green wire it remains connected to the side of the vacuum unit tank.
      4. The low voltage wires from the home will attach to the two connectors inside the black tower part of the board. It doesn’t matter which wire goes to which side.
      5. The yellow wires attached to the board are low voltage. They can be ignored or go to an on/off switch on the side of the vacuum tank (if one was present).


  2. SECURING


    Circuit boards are secured inside the vacuum by nuts on the exterior of the tank. The mini-breaker and low voltage connection tower come with nuts that screw down and secure the board to the inside of the vacuum from the exterior of the tank.
    1. If these two holes do not align with holes on the vacuum tank a new hole will have to be made. We suggest using a small drill to drill out the outline of a circle.
    2. If the low voltage tower (black with two connections) is not needed on your vacuum it can be hack-sawed off. The board will be secure with just the minibreaker connection.


  3. TESTING

    1. The board should work just like the previous set up.
    2. Test using a hose in the home or using the on/off switch on the tank if present.
    3. If the system doesn’t start, be sure the vacuum is plugged in.
    4. For more troubleshooting further give us a call.