Author Topic: Yet Another Airgunner What Thinks He Knows Something Reviewing a Compressor  (Read 5392 times)

Alan

  • Administrator
  • Hero Member
  • *****
  • Posts: 1585
  • Set the example... Don't be one!
    • Mobile Amateur Radio
Water Filter Comments
« Reply #15 on: March 29, 2016, 09:25:25 AM »
Interesting that you brought up the water filter.

I did buy what Joe recommended, and I'm not sorry I did. I also bought a silica gel water trap that goes on the low pressure side. I've run the Freedom8 compressor for a total of 4 hours so far, and the silica gel is still as blue as it started out being. It is dry here, I haven't drained the low pressure compressor for at least a year. Just for fun, I opened the petcocks, and less that a dribble came out. I suspect in other parts of the country, one should buy the best water filter he can get. Sure beats what can happen if water gets into the works!
  • Roswell, New Mexico
Alan

I have an Omega compressor. If you're a fellow Guild member, and you pass through Roswell, NM, I'll fill your portable tank as a courtesy.

Bob La Londe

  • Sr. Member
  • ****
  • Posts: 321
    • CNC Molds N Stuff
Even in the desert there are usually times of year when the humidity climbs.  I happen to live in a river valley with a direct path to the Sea of Cortez (Gulf of California for those of us who are a little older).  Most of the year its pretty dry where I live but August and part of September can be pretty humid.  Also, I live in one of the big bread baskets of the Southwest.  There are huge acreages of irrigated crops.  Sometimes that can bump humidity in multiple micro climates around the area. 

P.S.  I didn't run the compressor last night.  I was to busy with other stuff, and I am still dragging a bit from what I decided was a bug and not food poisoning.  Lasted too long to be food poisoning. 
« Last Edit: March 30, 2016, 08:43:57 AM by Bob La Londe »
CNC Molds N Stuff
www.cncmolds.com

Bob La Londe

  • Sr. Member
  • ****
  • Posts: 321
    • CNC Molds N Stuff
Still haven't run it.  Just been so darn busy.  Its sitting right there ready to fire up and fill a tank. 

Well I ran it with no back pressure a few days ago, and it sounded like the contacter was kicking out, so I replaced it with my contactor and ran it again with no back pressure.  It sounded better.  I didn't really want to run it with my old used replacement parts.  I just wanted to figure out how it was all wired, but I did want to hear it run. 

No replacement parts have shown up from Mrodair.  That does disappoint me a little.  They made a big deal about that's why they stock the parts for what they import when I called.  Who knows.  Maybe they are already in the mail.  I'll drop them an email shortly, and if I don't hear back I'll just run the compressor with my own parts and see how it does. 

I just suggested one of their low end PCPs to somebody today, but I wonder if that was a good idea if they can't get in stock parts out for an item that arrived damaged.  I was also looking at that gun myself as a possible gift for next Christmas for my Dad.  Maybe I'm just being over anxious.  I'll keep you guys posted. 

« Last Edit: April 01, 2016, 06:48:02 PM by Bob La Londe »
CNC Molds N Stuff
www.cncmolds.com

Bob La Londe

  • Sr. Member
  • ****
  • Posts: 321
    • CNC Molds N Stuff
Well, I did receive an email saying tracking says parts have been delivered, but unfortunately my video cameras say they weren't delivered here. 

CNC Molds N Stuff
www.cncmolds.com

Bob La Londe

  • Sr. Member
  • ****
  • Posts: 321
    • CNC Molds N Stuff
Well, I guess I am going to give up and just run it and see how it does.  Last message I received was that the parts were delivered and signed for, but I never did get any tracking information.  I've been here all day, and I sure didn't sign for it.  I may be on my own from here on out. 



« Last Edit: April 04, 2016, 06:40:04 PM by Bob La Londe »
CNC Molds N Stuff
www.cncmolds.com

oldpro

  • Hero Member
  • *****
  • Posts: 1220
 May the force be with you!!!
  • Mount Shasta Ca.

Bob La Londe

  • Sr. Member
  • ****
  • Posts: 321
    • CNC Molds N Stuff
Well, I just finished making the mounting bracket to keep my air drier vertical and mounted it.  A few moments ago I ran the compressor under load for the very first time.  It got up to about 2200 PSI, there was a small arc flash from under the top panel somewhere, and the compressor shut down.  I started to do some quick diagnostics, and pulled the spade terminals off the main power switch.  One of the pins just pulled out of the switch.  I don't know if that was the problem, but I felt I better come over here and sit down at my desk for a moment before I got pissed off and attacked it with a screw driver. 

CNC Molds N Stuff
www.cncmolds.com

Bob La Londe

  • Sr. Member
  • ****
  • Posts: 321
    • CNC Molds N Stuff
Bypassed the switch (just for testing purposes) and it works.  I went ahead and ran the compressor upto about 3500 PSI (same pressure as my tank was at) and then opened the tank valve. The o-ring around the base of the fitting with what looks like a check valve on their drier / bleeder assembly blew out.  I took the fitting out, and it looks like the o-ring was sliced during assembly.  There were shreds of it down thru the threads.  I'm not sure how that was accomplished except maybe if the o-ring was just slapped on the top of the block and the fitting was shot in down thru it.  It was also assembled dry.  There is no sign of any silicone grease. 

My tank is now at 3300 PSI.  We are going backwards here.

« Last Edit: April 05, 2016, 12:27:32 PM by Bob La Londe »
CNC Molds N Stuff
www.cncmolds.com

Alan

  • Administrator
  • Hero Member
  • *****
  • Posts: 1585
  • Set the example... Don't be one!
    • Mobile Amateur Radio
I'm beginning to think that high-pressure pumping isn't an exacting process! I purchased a Freedom8, and the instructions are rather ambiguous. The photos in the manual do not match the unit I bought.

I did get the regulator set, or so I thought. The original setting was 3,200 psi, but there are instructions on setting it to 4,500. The initial refill came up to 4,600 which is close enough. But every time I have used it since, the pressure has increased by about 50 psi. It now tops off at 4,750. That's a bit high!

The issue we're both having just should not exist. Poor packing, easily broken parts, incorrect or missing instructions, and the list goes on. Now I see why Travis is looking into purchasing a Bauer. Apparently, they're doing it correctly. We'll see.
  • Roswell, New Mexico
Alan

I have an Omega compressor. If you're a fellow Guild member, and you pass through Roswell, NM, I'll fill your portable tank as a courtesy.

Bob La Londe

  • Sr. Member
  • ****
  • Posts: 321
    • CNC Molds N Stuff
Well, the o-ring in the fitting it screws into was smashed all out of shape as well.  I just replaced that. 

Then I finally ran the compressor and actually increased the PSI in my tank. 

I read all the reviews saying it wouldn't run on a 20 AMP circuit.  I figured I'ld give it the benefit of the doubt since my shop has all 20 amp circuits that are properly wired.  I know.  I installed them all.  It started tripping the breaker at around 3600 PSI.  To give it the best chance possible I reset it three times and it got up to about 3800 PSI. 

It will not run on a 20A 115V circuit to full pressure.  Fortunately I do already have a 30 AMP outlet installed.  Unfortunately its on the outside of the shop for plugging in an RV.  I never park and RV out there anymore, so I may just plumb it into the shop.  I sure don't want to leave my compressor outside. 

CNC Molds N Stuff
www.cncmolds.com

Bob La Londe

  • Sr. Member
  • ****
  • Posts: 321
    • CNC Molds N Stuff
I received actual tracking from Mrodair.  Turns out they looked up the wrong tracking, and didn't actually ship my parts.  They sent me a photo of the current shipping label, and the carrier has actually picked it up. 
CNC Molds N Stuff
www.cncmolds.com

DJBriez

  • Newbie
  • *
  • Posts: 4
Hi Bob,
I too have an MRODAIR compressor.
These are the kinds of things that just leave me baffled.
I do not yet have a 30 amp circuit.
I run mine on my laundry rooms 20 amp circuit. When I first turn it on, it does indeed trip the breaker.
After I reset the breaker, it runs fine. I have filled my 66cf SCBA tanks (2) to 4500 psi many times over now ( 8-10 at least). The breaker has never tripped mid fill..... Not even once.

DJ

Bob La Londe

  • Sr. Member
  • ****
  • Posts: 321
    • CNC Molds N Stuff
Well, Mrodair has commented on using work arounds, and several owners have had issue running their compressors on 115V 20 amp circuits.  I personally wired my shop and I am a licensed contractor with 22 years experience.  (actually much more, but 22 years with my own license)  I don't know why you are baffled.  The reason I might be baffled is that your compressor does operate on a 115V 20 amp circuit. 

To further that and to eliminate a flaky braker as a potential problem I have since tried it on two other circuits.  Same results.  I know every peice of equipment on those circuits, and none of it was powered on when the compressor was running. 

I see it all the time on forums where people say, "well I don't have that problem," like it some how implies that the problems of others are their own fault.  I am happy for you that yours doesn't seem to have the problems that so many others do, but its not an isolated instance of just me having an issue.  It is a routine recurring symptom with multiple compressors.  Maybe the braker your compressor on is flaky and not tripping as low as it should.  Given the overwhelming anecdotal evidence I think I'd throw an amprobe on your compressor and watch it to see what its actually drawing as it tops a tank.  Maybe you got one with heavier windings or something.  The rest of us would probably like to know.  I know I would. 











CNC Molds N Stuff
www.cncmolds.com

DJBriez

  • Newbie
  • *
  • Posts: 4
Bob,

That's precisely my point....... I'm baffled as to why mine exhibits this behavior, amidst many reports of others not operating properly on 20 amp circuits.

DJ

Alan

  • Administrator
  • Hero Member
  • *****
  • Posts: 1585
  • Set the example... Don't be one!
    • Mobile Amateur Radio
I'll answer that question DJ.

First of all, just like fuses, different brands of circuit breakers have a bit different I2T. Unless you look their ratings up, you wouldn't know what they are. Since we're talking 20 amps (peak?), a longer Romex run will have more resistance than a short one, and hence will effect the overall I2T. This said, the NEC specifies what size wire should be used for a specific length and amperage, however that alone is not a load-specific guarantee.

I can't speak for Bob, but when I do wiring (yes, I too have an electrician contractors license, and an active one at that), I always use one size bigger than is technically (NEC specified) required. This reduces the I2R losses, and reduces heat losses as well.
  • Roswell, New Mexico
Alan

I have an Omega compressor. If you're a fellow Guild member, and you pass through Roswell, NM, I'll fill your portable tank as a courtesy.