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I have the same situation with every tech I come in contact with,,, in fact I have 2 50 pound recovery tanks at my job with 50 pounds of r22 in them. (not recovered by myself) But is is un-nerving...

Does the exterior unit have a temp control for fan and compressor cycling / defrost. Wondering if the sensor could be out of calibration or settings wrong which would shut off your exterior unit....

I have a question as to what parts of the site I can post on.
I got kicked off for a few weeks for the violation and am wanting to get my min posts to become a prof. member but do not want to get...

You can read continuity through the switch if it is ok. If pressure falls for a low pressure, or rises for a high pressure then you would not read continuity through the switch. This also goes with...

This is just a tech tip.

We have 103 degrees temps, trying to recover a 100 pound system. It just isnt pulling. Shut off the fans on a four stage, two compressor r-22 McQuay DX system.
...

I have done studies on this things only because they loooove my backyard and I hate them. They love cool and dark areas and hide in them. I dont think that this is because of the contactor. Try...

Thats what I am thinking... I am not saying that the pressures werent overcharged in the first place.
And the contactor was pulled in. I had voltage to the comp. and nothing.

But then the mystery...

We currently use our mixed air for modulation.

Plus keep the variables set for min and max to not overshoot your building. Are you using a program to control the ddc, we currently have Seimens...

I'll agree to a point on all accounts. I've seen to much back stabbing to get beyond the human element though.
Seems that it always catches up to them in the long run. Its only if you are willing...

We had a few storms feed through here in Ohio in the past week. Had a chance to go look ata buddys ac unit which wasnt working properly, at all by the time I got there.
He stated that the tech that...

Guess you are not the most optimistic person to get feed back from... Lol. I'm still stating and maybe I am wrong that anyone doing a service run on a daily basis knows what to look for before they...

Yes, we call it "preventative maintenance" and this does improve the longevity of our equipment. But it still doesn't involve as much of the troubleshooting side of the field as I would like.

Just a question,,,, what is the refrigerant you are working with on this system?

In my work we have to fix what is broken. The only thing in Commercial Facilities we do not have a a/c unit broke on a daily basis...
And that is the only training I get besides my personal...

I carry my blackberry phone with the flashlight app... cant leave home without it and it works like a charm. Seen the light for the iphone 4's just as nice. Yes its not a typical flashlight but,,,,...

Shhh,,,, sounds like a patent to me. lol I never have heard of one but how does your work to not be in the way of the door or yourself or the furnace on an changeout?

Keep ya posted if I see...

I would figure everyone temperment is a bit different... some want work done for free some want to tip you when you leave on top of what they owe.

It seems as if it was wrong place wrong time,...

I believe in OEM specs but a good rule of thumb is 10-12 superheat at evap, and 20 at comp.,
And subcooling 10-18.
I honestly havent found it any diff. from application to application. Heard it...

We also use "hotshot" for any R-12 conversions... great on price and swear by it. Just in case it helps you on price at all.

http://www.icorinternational.com/products.html

Close p/t swings...

that would corrilate to a -21 evap by pt conversion. More than enough cooling at the evap. How many fans do you have running on the evap? I would check that one wasn't running backwards or not at...

http://www.hvacsalesandsupply.com/Linked%20Documents/Tech%20Tips/Proper%20System%20Charging.pdf

This might help out as well... with this subcooling and superheat chart.

What are the low side pressures. 60 psi or greater I am assuming at this point to be above freezing at the coil. Delta T across coil above 20, Subcooling 10-12? Superheat 10-12?...If so,,, seems...

Boxed around both sides of the stud? Or just cut out and you are going to seal around stud? Either way. I think I would have asked to have it reframed, or reframe it myself to have it an open access...

I work in maintenance, actually blessed, "commercial maintenance". You figure any job out there has a little to do with a/c,,,plumbing, electric, hvac, try to look around for something in...

I've had some pretty nasty coils, that one looks like a cat got stuck in it. Flaky coils is a definite on a replacement.. but it looks more like hair to me. A little tlc with a cleanout might be a...