Barksdale BPS3000 Electronic Pressure Switch Instruction Manual - Manuals+ (2024)

FAQs

How do you adjust Barksdale pressure switch? ›

If the actuation point is above the desired value, turn the adjustment screw or knob per instructions in the pressure switch catalog to increase the actuation point, and if it is below, turn the adjustment screw or knob in the opposite direction to decrease it.

An electronic pressure switch generates electronic switching signals and, very often, also an additional, analogue output signal proportional to the pressure. They are either programmed at the factory to the desired switch points or they feature a programming interface with integrated display and buttons.

Always adjust the large hex nut first to set the operating point. Turn clockwise to increase pressure, counterclockwise to decrease. On standard operation, this is the cut-out, where the contacts will open on high pressure. On a reverse action device, this is the cut-in, where the contacts will close on high pressure.

Disconnect the wires connected to the pressure switch by pulling the wire connectors off of the switch terminals. Set a multimeter to test for resistance (ohms). Touch each tester probe to one of the switch terminals. The pressure switch tester should read 0 or close to 0 (indicating no resistance).

With the cover removed and the power on, use the handle of a screwdriver and bang it firmly against the tube under the switch. This will jar its electrical components. If you notice a spark and the pump powers on, you have a bad pressure switch.

Increase the Water Pressure

Another way to increase GPM is to turn up the water pressure. This can be done by adjusting the pressure valve on your pressure washer. Be sure not to increase the pressure too much, as this could damage the machine.

Your well tank's pressure should be set at 2 psi below the pressure switch's cut-on point. This differs depending on your tank's pressure settings. Most well tanks come set at 30/50. The cut-on pressure for the well pump is 30 psi, so the pressure of the tank should have a pressure of 28 psi.

If you tighten the screw the water pressure will be more and if you loosen the screw the water pressure will be less. Turn the screw clockwise to tighten it and increase the pressure, or turn it counterclockwise to decrease the pressure. Do not be too hasty.

Air tools made for general use with portable air compressors typically require 0 to 5 cubic feet per minute (cfm) at 70 to 90 pounds per square inch (psi), whereas with larger tools connected to stationary systems, the requirements usually exceed 10 cfm at 100 to 120 psi.

What can causes a pressure switch to fail? ›

The electrical contacts in your pressure switch can degrade over time. Frequent cycling of power to the switch and the presence of corrosive substances are two common causes.

If the air intake or exhaust is clogged with debris, the pressure switch can remain in the OPEN position. This is because blockages prevent the inducer fan from creating negative pressure. A furnace pressure switch stuck open is a common problem for many homeowners.

BYPASSING THE PRESSURE SWITCH IS NOT A REPAIR

It is simply an attempt to troubleshoot the furnace by isolating what might be causing the problem. Any attempt to bypass the system should only be done by an HVAC technician with the proper training and test equipment.

Hold the reset lever in the start position until the pressure builds up and the gauge reads over 40 PSI; then let it return to the AUTO position. The pump should now run on its own and continue until the pressure reaches the cut out setting, (usually between 50 - 60 PSI), and then shut off.

So a minute on and a minute off has always been the minimum rule of thumb. Two minutes on and two minutes off is just that much better for the motor. With the old conventional pressure tank method, the pressure tank fills at the rate the pump can produce, less the amount of water being used at the time.

The pressure that affects the sensing element may be the difference between a positive pressure on one side of the diaphragm and the atmospheric pressure on the other side; a negative pressure and atmospheric pressure; two unequal positive pressures; two negative pressures; or one positive and one negative pressure.

Note: Switches don't have positive or negative ends, so you can place them in any direction within your circuit.

Wiring a Two Wire Switch

The incoming power will land on the line terminals, labeled as L1 and L2. These are the outside 2 screws. The wires are interchangeable. The motor leads will land on load terminals, labeled as T1 and T2 or M. These are the middle two screws and the wires are also interchangeable.

Remember for all pressure switches with the exception of vacuum switches, turning the adjustment screw clockwise will increase the pressure setting and turning it counter-clockwise will decrease the pressure setting. On a vacuum switch, the opposite will occur and the opposite applies.

Safety and Identification of a Square D Pressure Switch

Typically, one nut size is a 7/16 inch and the other is either a 3/8 inch or ½ inch wrench. The larger of the two springs, called "nut #1," is used for raising and lowering the cut in and cut off pressure.

What PSI should air compressor shut off? ›

An air compressor will start (Kick On) when the pressure (PSI) in the air tank drops to a pre-set PSI (example 90 PSI). The air compressor will continue to run until the pressure (PSI) in the air tank reaches the Max PSI (that is pre-set) and Kick Off (shut off) (example Max 120 PSI).

ADJUSTING THE PRESSURE SWITCH

Loosen the locknut on the pressure switch. Turn the adjusting screw in the clockwise direction to increase the pressure setting and counterclockwise to decrease pressure.

NOTICE: The switch should never be adjusted to cut-on below 20 PSI, or cut-off above 60 PSI. The pressures in a well pump system must keep a set relationship.

Pressure sensors can be found in instruments such as indicators and controllers and should all be calibrated in order to minimize the probability of erroneous readings.

Hold the TPMS reset button until the tire pressure light blinks three times, then release it. Start the car and wait about 20 minutes for the sensor to refresh. You will find the tire pressure monitor reset button under the steering wheel. Refer to your vehicle's owner's manual if you can't find it.

For a single level home or a two story home without water fixtures on the 2nd floor a 30/50 PSI setting may be sufficient. For two or more levels with water fixtures on more than one level you may want to use 40/60 PSI setting. It's easier for a pump to supply the lower pressures and it's less strain on old plumbing.

Some of the most effective ways of increasing water pressure is to raise the setting on the pressure switch, install an additional pressure tank, install a constant pressure valve, install a pressure booster, or change to a constant pressure system.

Here are some tell-tale signs that your pressure switch is beginning to fail: Your water pressure is at or above the cut-out pressure, yet the pump doesn't turn off. Your pump doesn't turn on at the proper cut-in pressure. You have low water pressure even though the pump is running.