Information
Type: Adjustable Auto-Cycling
Vacuum: Air Powered Venturi
Page: 7 of 9
Wiring the Vacuum Press
The wiring for this unit is very simple. Just follow the instructions below and your veneer press will be nearly complete!
If you are soldering the wires to the vacuum controller, be careful not to damage the vacuum controller by over-heating the tabs. Here's the proper technique:
Allow the soldering iron to reach full heat before you begin. Then apply solder to the common and normally closed tabs. Next apply solder to the wire ends. Lastly, reheat the wire ends onto the tabs. This last step should not require any additional solder.
If you opt to use crimp-on connectors, simply strip off 1/4" of insulation and insert the wire into the connector and crimp the plastic area of the connector with a pair of pliers.
Attach the utility box to the top of the carrier with two small screws. Be certain that the screws do not protrude through the bottom of the board.
Insert the electrical cord into the box through one of the connectors and tighten the locking screws.
Cut one of the wires from the Mac valve just longer than needed to reach the normally closed tab on the vacuum controller. Attach the wire to the vacuum controller with solder or a crimp-on connector. Note that the tabs on the vacuum controller are covered by a removable plastic lid. Remove this piece for easy access to the tabs by pulling upward on it.
Using the remaining piece of wire that was cut off in the step above, attach one end to the common terminal on the vacuum controller. To get to this tab, you need to remove the plastic "lid" on the vacuum controller. See the animation above.
Insert the other end of this wire into the utility box and with a wire nut, attach it to the white wire (neutral) from the electrical cord. If the power cord you are using is all black, the wire with the ribbed texture is the same as also consider the white (neutral) side.
The remaining black wire from the Mac valve can now be inserted into the utility box and attached to one of the terminals on the light switch (other than the ground terminal).
Attach the black wire from the electrical cord to the opposite terminal on the light switch (again, not the ground terminal).
Tighten the connector on the utility box that holds the two black wires.
If your electrical cord has a ground wire, attach it to the green grounding screw on the light switch.
Attach the light switch to the utility box and screw on the light switch plate cover.
The final assembly should appear as shown in the picture below.
Wiring Check Let’s re-examine the path of electricity. Start with the black wire from the electrical cord. The flow should go this way:
The black A/C line goes to a switch terminal.
From the other switch terminal, a black power line is going to the normally closed tab on the vacuum controller.
The power then flows from the common tab on the vacuum controller to the Mac valve.
The remaining wire on the Mac valve goes to the white wire on the
electrical supply cord.
Test the Wiring At this time, you can replace the plastic housing that the covers the terminals on the vacuum controller. Do not attach the compressed air line yet. Plug in the A/C cord and turn on the light switch. Listen for a click from the Mac valve. If you do not hear the Mac valve click, try backing out the adjustment screw on the vacuum controller. Sometimes the factory sets the screw too far in for the switch to engage even at zero vacuum pressure.
Welcome
Attach two box connectors to the utility box. 
The black A/C line goes to a switch terminal. 
