Closes at 4 psi. 2801050103 hp 12 volt 230 hertz 60 max amp 59 automatic thermal motor protection.
Pressure Switch With Burned Contactspressure Switch With
Pressure switch contacts stay open. Honeywell hobbs hour meter pressure switch california power systems honeywell hobbs hour meter pressure switch normally open. I do not know what the pump is since i did not own the house when it was installed. The contacts are not welded shut. Sometimes when the pressure reaches 50 lbs. I replaced the pressure control switchthe pressure gauge and the 4 pipe the control switch sits on. For higher voltagescurrents silver contacts are used.
If the contacts are held open and there is no water pressure attempt to cycle the switch by pulling the contacts open. Zero or near zero water pressure into the switch plus open contacts means a faulty pressure switch. Micro switches with gold contacts are normally used on low voltage low current applications ie. The gauge should read near zero but what if the gauge is faulty. The points open as they should and sometimes they remain closed even though the pump tuns off. Heres some helpful hints to help save time on a service call.
The pressure switch contacts stay closed. Single circuit with two insulated terminals. I then checked the pressure switch. If the switch closes turn the power back on. On circuits that are intrinsically safe. Both the supply side and the motor side are reading 240 volts.
Generally they are a normally open switch that closes with either a rise or fall in the pressure it is monitoring they are used mostly as a safety device but are also used for operation control such as fan cycle controls for low ambient cooling starting and stopping for steam boilers and the list goes on. Here is the info on the control box. I can physically open the contacts but when i let go they returned to the closed position. This may dislodge the internal spring. The contacts stay closed even when the pump is unplugged. The electrical contacts in your pressure switch can degrade over time.
You make a temporary repair to contacts by filing away the affected area though be sure to kill all power to the pump before you do. It could be your pressure switch stuck open or closed. If there is pressure above the cut in pressure then the switch staying open is normal. The pressure switch is square d class 9013 ser b fsg on 30 psi off 50 psi any suggestions on what i. When the pressure switch actuates the no contact become close and the nc becomes open. Frequent cycling of power to the switch and the presence of corrosive substances are two common causes.
Check that you have near zero water pressure. Having issues with your hvac unit overheating or shutting off. The contacts are closed and do not appear to be burnt. If the contacts remain open and there is no water pressure the switch is bad.
Gallery of Pressure Switch Contacts Stay Open
