Thomas Compressor

[yara92]

I understand what you say, I have problem that we use the Thomas Compressor, 1/10 HP Model: 405ADC38/12 it is not working until it up 120 PSI about 70 psi stooping then after a while continue working.
So I don’t know where is the problem . I use the wiring PCM

[rich2202]

Originally Posted by yara92

Thomas Compressor, 1/10 HP Model: 405ADC38/12

That compressor is rated for 100 psi. It will likely not stop running until the thermal switch on the compressor stops it. And then, it will not restart until the thermal switch resets.

The Nason pressure switch trips around 115 psi, well above the rated pressure of the compressor. It should not pressurize the system to the "fully charged" 115 psi level.

I don't know whether it is allowed to adjust the Nason switch to trip at a lower psi.

[FrankJ]

Originally Posted by rich2202

That compressor is rated for 100 psi. It will likely not stop running until the thermal switch on the compressor stops it. And then, it will not restart until the thermal switch resets.

The Nason pressure switch trips around 115 psi, well above the rated pressure of the compressor. It should not pressurize the system to the "fully charged" 115 psi level.

I don't know whether it is allowed to adjust the Nason switch to trip at a lower psi.

If this is the old FRC compressor, it will run to 120 PSI, no problem. The pressure switch is sealed. It is somewhat adjustable, but it would no longer be First legal. Since the rules require a specific part number, you cannot order it with a lower set pressure. Lot of discussion about this last year.