[markkitch]

Hey guys,

I need some help and input. My system has been altered and I am trying to sort out what is correct and what is not correct. 

I need to understand what the 12 VDC air compressor powers: Front door, interior doors and toilet. 
Questions:
A) does it also provide air to the red line (brake system)?
B) What else should the 12 vdc compressor power?
C) Should it fill the aux air system?

In the current configuration the pressure switch is on the red line side, so it is monitoring the red line pressure (from the added 120 VAC compressor) not the 12 VDC output, there is a check valve inline. 

The green and blue lines to the slide seals are on the high pressure side (60 psi) at the 12 VDC compressor. 

The blue line / small black line for doors / toilet are on the low pressure side of regulator on the 12 VDC compressor. 

My redesign is:
12 VDC compressor output to:
pressure switch
check valve to red line
regulator to blue/green slide seal lines
regulator to blue / black line to doors and toilet 

A 120 VAC compressor has been added to the system in the mid-compartment, it provides air to the red (brake) system and the green (slide seal) system. See pics. I see this as a good thing, the added tank capacity helps with compressor run time.

The original 120 VAC compressor on the street side seems to be fully functional but does not provide air to my blue line (doors, toilet), I have not looked into this in depth yet. But will.

I am trying to get a handle on the 12 VDC compressor for now.  

I do have an additional question regarding the entry door. Locking the door from inside the coach, this may be an air issue, can the alarm system affect locking of the door (from the inside)? how do you turn the alarm off? When I try to lock the door from the inside, I have a relay clicking in the front compartment (constant click, click, click, click). I can try to toggle the door lock switch a few times to try and get it to stop clicking. 

I appreciate the help.

[Richard]

https://newellgurus.com/showthread.php?tid=4957

A couple of key concepts.

One, there should be regulators at the slide seals.
Two, you want the slide seals to be aired from the 12VDC slide.
Three, you may have the check valve in the wrong location and wrong orientation on your drawing. The idea is to prevent the 12VDC from trying to air up the suspension or brake tanks. So air from the 120 VAC and engine compressor can flow through the check valve to reach doors, seals, potties and such, but air from the 12VDC does not flow to the brakes and suspension.

Be aware that you may have a ping tank just above the passenger drive wheel where the check valve above is mounted.

[markkitch]

Thank you Richard very helpful.

I agree with you on the regulators at the seals, for some reason there was a connection from high pressure at the 12 VDC compressor direct to the curb front slide seal.

Got it, the slides should be powered by 12 VDC compressor.

Good input on the red line (brake) check valve, this confused me a bit, I thought maybe for safety reasons the red line should not dump into the other systems. I think for now I am going to put a shutoff valve in that spot.

I do have a ping tank (curb side in front of drive tires). Is the pressure in the ping tank indicated in dash gauge (air supply, pic below)?

I am moving away from the incorrect configuration and toward the below schematic. 

Thanks for the help!




https://newellgurus.com/showthread.php?tid=4957
A couple of key concepts.
One, there should be regulators at the slide seals.
Two, you want the slide seals to be aired from the 12VDC slide.
Three, you may have the check valve in the wrong location and wrong orientation on your drawing. The idea is to prevent the 12VDC from trying to air up the suspension or brake tanks. So air from the 120 VAC and engine compressor can flow through the check valve to reach doors, seals, potties and such, but air from the 12VDC does not flow to the brakes and suspension.
Be aware that you may have a ping tank just above the passenger drive wheel where the check valve above is mounted.

[Richard]

I don’t know where Newell picked up the supply pressure.