11-08-2014, 04:59 PM
I find this a very interesting thread. It explains a number of things I had not fully understood.
I was aware there were two devices that would run the auxiliary compressor and knew that the "well pump" switch was the one that ran the compressor in my case. I had no idea why there was another contactor and could not even speculate on a reason it would be necessary. I just figured it would remain a mystery.
Subsequent to that I had the coach connected to a shop's air compressor system and when fullly aired up, the shop air was showing around 130psi on my gauges. That is a bit higher than the cutoff on my engine compressor, but not dramatically so. Well, when the shop air was on there was an audible leak in the right front bay. The leak would stop as soon as the air was removed. I was not able to isolate the leak at the time I was in the shop. When I returned home I noticed the auxiliary compressor running more than normal and went on the prowl for the reason. My ultra-sonic detector quickly located the leak at what appeared to be an pressure regulator with nothing connected to its output. This device was located right at the "well pressure" switch.
I contacted Newell and was informed this was a pressure relief valve and was used on some coaches, but if it was leaking and I wanted to remove it to go ahead. I figured that once it had been necessary to relieve pressure it was unable to seat perfectly again and would continue to leak at even normal pressures. So I removed it.
Now I know why it was there if the mystery contractor is activated by the HWH leveling system and runs without the benefit of any pressure switch to limit the pressure produced. I am undecided right now what I will do. I never leave the leveling system on after I am level and I doubt my little dental auxiliary compressor could reach pressure sufficient to damage anything, but I sure see how it might happen.
I will most likely just disable the HWH contactor to be safe.
I have attached a picture of the relief valve I took prior to removing it.
I was aware there were two devices that would run the auxiliary compressor and knew that the "well pump" switch was the one that ran the compressor in my case. I had no idea why there was another contactor and could not even speculate on a reason it would be necessary. I just figured it would remain a mystery.
Subsequent to that I had the coach connected to a shop's air compressor system and when fullly aired up, the shop air was showing around 130psi on my gauges. That is a bit higher than the cutoff on my engine compressor, but not dramatically so. Well, when the shop air was on there was an audible leak in the right front bay. The leak would stop as soon as the air was removed. I was not able to isolate the leak at the time I was in the shop. When I returned home I noticed the auxiliary compressor running more than normal and went on the prowl for the reason. My ultra-sonic detector quickly located the leak at what appeared to be an pressure regulator with nothing connected to its output. This device was located right at the "well pressure" switch.
I contacted Newell and was informed this was a pressure relief valve and was used on some coaches, but if it was leaking and I wanted to remove it to go ahead. I figured that once it had been necessary to relieve pressure it was unable to seat perfectly again and would continue to leak at even normal pressures. So I removed it.
Now I know why it was there if the mystery contractor is activated by the HWH leveling system and runs without the benefit of any pressure switch to limit the pressure produced. I am undecided right now what I will do. I never leave the leveling system on after I am level and I doubt my little dental auxiliary compressor could reach pressure sufficient to damage anything, but I sure see how it might happen.
I will most likely just disable the HWH contactor to be safe.
I have attached a picture of the relief valve I took prior to removing it.
Russ White
2016 Winnebago Vista LX 30T
#530 ( Sold )
1999 45' Double Slide - Factory upgrade 2004