A pressure switch diagram is a visual representation of the circuit that controls a pump and can be helpful when repairing or replacing a switch. This diagram is usually based on the wiring schematics from the manufacturer and shows all of the electrical wires that are connected to the switch.
If you are installing a new switch, make sure to turn off the power from the main panel before working on any parts of the system. This will help to ensure that there is no risk of electrocution.
Take a photo of the wiring connections before you start, then label each of them and create a little sketch as well. This will help to guide you and ensure that you connect the correct wires to the right terminals on the switch.
Step 1: Disconnect the power from the pump. This is important because it will help to eliminate any voltage spikes that could damage the switch and cause the unit to malfunction. Use a voltage meter or VOM to verify that power is off and that it is safe to work on the switch.
Remove any old pressure switch from the water line and replace it with a new one. This is a simple process that involves unscrewing the old switch and screwing the new one in place.
Depending on the type of switch, you may need to tighten the nut on the pressure switch and remove any loose threads. You can either use a pipe joint sealing compound or Teflon tape to do this. You should not use extreme rotation on the nut or threads to prevent damage to the switch or the plumbing connections.
Then you can re-wire the switch to the pump. This is also a basic and simple process that can be accomplished by yourself.
You will need to crimp the red wire into the end of the connector to make the connection. You can also use a soldering iron to make this connection, but this is not recommended because it can cause the connector to become damaged and can lead to fire.
Next, you will need to run a few wires from the pump to the pressure switch. The incoming power will be coming in on two line-in terminals (labelled L1 and L2), the motor lead will land on two load terminals (labelled T1 and T2) and the ground will land on a green screw located at the bottom of the switch body.
Alternatively, you can simply wire the pressure switch directly to the pump. This is easier and more convenient but can be more time consuming.
Step 2: Open the valve to let air or oil into the system as needed. You should be able to see the light on the switch turn from red to green and then back to red again after it actuates.
If you have not been able to do this, it is important that you check with the manufacturer to see if there are any additional wires that need to be connected. This will help to make the process easier and safer.