The proposed action seems good but save time and check for the blockage
first, the pressure switches dont change setting much, the one thing to
get on top of is to regularly check and adjust the pressure in the tank
(The static air pressure) that does gradually change.
On 12/05/2019 11:07 pm, Prouvost wrote:
Pondering that which Rheilly Phoull wrote:
We used to test and set such with a variable air supply (Like the
control valve on a spray booth paint gun setup) in your case it would
be a good idea to remove the switch and check the usually small
orifice that is in the water inlet of the switch, it is a common fault
for those to become blocked. While you are on the job it looks like
the system could use a coat of paint !!
Thank you for showing how to test the switch instead of just blindly
replacing it, where I try to never replace a part that I can't prove is
broken.
I only blindly replace things when I don't understand how the system works,
which means I can't test it properly due to my ignorance of the system.
I researched how the system works overnight where I wrote up this
troubleshooting flow chart that I'd like to ask for review.
I'll likely do the work today but this is what I figured out overnight.
Non-inventory parts & tools needed:
(1) Water pressure tester GHT fitting (at least 0 psi to about 75 psi)
(2) Pressure gauge (NPT fitting) (at least 0 psi to about 75 psi)
(3) Pressure switch (Double-D brand, preset to the correct range)
Normal inventory parts & tools needed:
(1) Air compressor & hand-held Shrader gauge (2) 220VAC voltmeter or DMM
(3) Wrenches, flat file, pipe dope, screwdrivers, Sharpie, and so forth
Basics of normal operation: (30-50 psi for homes with 20 pound
differential)
(1) The bladder is pressurized to about 28 psi in most homes (or 38)
(2) The pressure switch is set to close 4 pump contacts at 30 psi (or 40)
(3) The pressure switch is set to open 4 pump contacts at 50 psi (or 60)
Basics if the pump isn't turning on:
(1) The pressure to the pressure switch may be faulty
(2) The pressure switch contacts can be pitted or corroded or sticking
(3) The water line or the screen on the pressure switch may be clogged
Determine the design cut-in & cut-out pressure range
(1) Read pressure written on the tank & on the cap of the pressure switch
(2) Measure pressure in the tank at the cut-in & cut-off points
(3) Read the pressure gauge at the cut-in & cut-off points
Check bladder pressure
(1) Shut off the input/output to/from the pressure tank & drain
(2) Read pressure on tank when empty & full
(3) Bladder should be 2-4 psi below cut-in pressure (30-2 = 28 psi)
Clean debris clogging the pressure to the pressure switch:
(1) Clean the four contact switch points with a flat file.
(2) Clean debris from the screen on the bottom of the pressure switch
(3) Clean out the water tube connected to the pressure switch
What do the four contacts do
(1) Usually the inside two contacts generally obtain input line power
(2) Usually the outside two contacts generally output to the pump
(3) There are generally two ground screws, one each for the input & output
Safety concerns before removing components
(1) Turn off the power
(2) Shut off the nearest water valves to and from the pressure tank
(3) Drain the pressure tank of water until the pump gauge reads 0 psi
Adjust the pressure in the bladder & pressure switch if necessary
(1) Pressurize bladder to 28 psi
(2) Center large nut (3/8") adjusts the cut-in/cut-out 20-degree range
Â*Â* 1 clockwise rotation tightening the large spring adds 2-3 psi
Â*Â* Example values are 35-55 psi, 40-60 psi, 45-65 psi, and so on
(3) Side small nut adults the cut-out pressure only (widens the range)
Â*Â* 1 clockwise rotation = 2-3 psi
Â*Â* Example values are 35-55+2 psi, 40-60+2 psi, 45-65+2 psi, and so on
System overview videos
(1) [https://youtu.be/X4TZoFIsE2w]
(2) [https://youtu.be/CQayY5FTNKk]
(3) [https://youtu.be/Rb8k7xoBNSI]
(4) [https://youtu.be/2WGlRaTmvbM]
(5) [https://youtu.be/gJxjA5eDOS8]
Pressure tank videos
(1) [https://youtu.be/AH4H9mpwhnY]
(2) [https://youtu.be/w21qa2bMUh8]
(3) [https://youtu.be/9fTzXVIQDBY]
(4) [https://youtu.be/IhBifh7nCtg]
(5) [https://youtu.be/NzZI7WOnMMQ]
Pressure switch videos
(1) [https://youtu.be/Vq-8RCCeh3k]
(2) [https://youtu.be/1VNSv7xVzzU] (3) [https://youtu.be/D1QAkfbIclo]
(4) [https://youtu.be/DmCoc4e2gyI]
(5) [https://youtu.be/8TI98cs85ew]