Pressure Switch for Air Compressor Wiring Diagram

When it comes to air compressors, one of the most important components is the pressure switch. The pressure switch is responsible for turning the compressor on and off depending on the pressure level in the tank. Without a properly functioning pressure switch, your compressor may not operate at all or may operate in an unsafe manner. In this article, we will discuss the wiring diagram for a pressure switch for an air compressor.

What is a Pressure Switch for an Air Compressor?

A pressure switch for an air compressor is a device that senses the pressure in the tank and turns the compressor on and off at specific pressure levels. The pressure switch consists of a switch mechanism and a sensing element. The sensing element is connected to the tank and senses the pressure level in the tank. The switch mechanism is connected to the sensing element and turns the compressor on and off based on the pressure level.

Pressure switches for air compressors can be adjusted to turn the compressor on and off at different pressure levels, depending on the needs of the user.

The Wiring Diagram for a Pressure Switch for an Air Compressor

The wiring diagram for a pressure switch for an air compressor is relatively simple. There are two main components to the wiring diagram: the power supply and the switch contacts.

The power supply is typically a 120-volt AC power source. The switch contacts are the points where the pressure switch makes or breaks the electrical connection to the compressor motor.

Below is an example wiring diagram for a pressure switch for an air compressor:

Wire Color Function
Black Power Supply (Hot)
White Power Supply (Neutral)
Green Ground
Red Switched Power (to Motor)

Power Supply Connection

The power supply connection is typically made using a standard 120-volt AC plug. The black wire from the plug is connected to the black wire from the pressure switch. The white wire from the plug is connected to the white wire from the pressure switch. The green wire from the plug is connected to the green wire from the pressure switch, which is connected to the ground terminal on the pressure switch.

Switch Contacts Connection

The switch contacts connection is where the pressure switch makes or breaks the electrical connection to the compressor motor. The red wire from the pressure switch is connected to one side of the motor’s electrical connection. The other side of the motor’s electrical connection is connected to the black wire from the power supply.

When the pressure in the tank reaches the cut-out pressure level, the pressure switch opens the circuit between the red wire and the black wire, which turns the compressor motor off. When the pressure in the tank drops to the cut-in pressure level, the pressure switch closes the circuit between the red wire and the black wire, which turns the compressor motor on.

FAQ

What is the cut-in and cut-out pressure for an air compressor?

The cut-in pressure for an air compressor is the pressure level at which the compressor turns on. The cut-out pressure is the pressure level at which the compressor turns off. The cut-in and cut-out pressure levels can vary depending on the model and user’s needs. The appropriate levels can be found in the owner’s manual or by consulting with the manufacturer.

How do I adjust the cut-in and cut-out pressure levels?

Most pressure switches for air compressors have adjustable cut-in and cut-out pressure levels. To adjust these levels, turn the adjustment screw on the pressure switch. Turning the screw clockwise will increase the cut-out pressure level, and turning it counterclockwise will decrease the cut-out pressure level. Turning the screw clockwise will decrease the cut-in pressure level, and turning it counterclockwise will increase the cut-in pressure level.

What happens if the pressure switch fails?

If the pressure switch fails, the compressor may not turn on or may not turn off at the appropriate pressure levels. This can lead to damage to the compressor or other components of the air system. It is important to replace a faulty pressure switch as soon as possible to ensure safe and efficient operation of the compressor.

Can I use any pressure switch for my air compressor?

No, it is important to use a pressure switch that is compatible with your specific air compressor model. Using the wrong pressure switch can lead to unsafe operation of the compressor and damage to the compressor or other components of the air system. Consult with the manufacturer or a qualified technician to ensure you are using the correct pressure switch.

Can I install a pressure switch myself?

Installation of a pressure switch for an air compressor can be done by a knowledgeable and experienced person. However, if you are not familiar with electrical wiring or the operation of air compressors, it is recommended to consult with a qualified technician to ensure safe and proper installation.