If Guns Kill People, Do Pencils Misspell Words?
http://www.youtube.com/watch?v=An2a1...eature=related
Before we work on artificial intelligence why don't we do something about natural stupidity?
If Guns Kill People, Do Pencils Misspell Words?
http://www.youtube.com/watch?v=An2a1...eature=related
Before we work on artificial intelligence why don't we do something about natural stupidity?
well i don't see a problem with that lol
If Guns Kill People, Do Pencils Misspell Words?
http://www.youtube.com/watch?v=An2a1...eature=related
Before we work on artificial intelligence why don't we do something about natural stupidity?
I've used the Super Nova last week at work. I like the fact that the sensor and screen are seperate. I can put the screen where I can see it and just being the sensor seems to put less stress on the connection. Used it with the super evac kit and it seems to work great. Personally I've got the dv-22n and it seems to work fine, but I'm always wary of the connection. We had a shop dv-22n's senior go bad. Then again it seems like some of the guys in the shop can kill anything. We've lost 3 Micron gauges, nitrogen regulators, scales, tin snippets, recovery machines. Hopefully the Super Nova lasts a little longer. Think it was around a couple bills.
Dan
Can someone please explain to me -
Why is there never enough time to do it right the first time, but plenty of time to do it twice?
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In quickly reading this thread, I did not see any discussion concerning the need to always (not just the first two pulls) pull a vacuum on both high and low sides! In particular when there is a TXV installation. What you say?
Agree --pull on both sides -- otherwise, if the TXV is a non=bleed type and valves off the liquid side, you may not get proper vacuum. Also can attach micro gage to the high side.
id like to see more pictures of peoples vac set ups.
just got some new 3/8 hoses 2 i red one blue with 3/8 fitting on one end and 1/4 on the otherand 2 appion valve core removers. hopefully this will give me a tighter/quicker vac pull.
i have been setting up with one core remover on each side of system with cores removed and a 3/8 hose on the suction side directly to 3/8 vac port and the micron guage on the high side port so i have only been pulling from one side.. interesting about the txv and pulling from both sides..
maybe with two good large hoses i can put the other hose on the port on core remover and still have my mic gauge there as well?
I have been happy with my set up to date but i think my mic gauge, less then a year old, is leaking because when i isolate the old valve core by shutting it down from the system and shutting the rest of the system off from vac the micron gauge would start rising fast.. i was thinking its leaking or the core remover( old c&d), old JB was the issue hence i bought a bunch of new stuff and cant wait to try it out.
I guess if it still rises when i isoalte it i have a defective mic guage and need toi send it back..
if you only pull on the suction side and you have your micron gauge on the liquid line and if you can get it down to 500 microns and the rise is minimal then woudent that be ok?
I have always wondered if you could just pull a vac from the suction side with a txv.
now with the scroll compressor and lets say a non bleed txv wouldent the scroll compressor act like the bleed ?
or maby im confused ?
im not sure lol
If you're pulling from just the suction side and with your Micron gage on the liquid side and reading 500 microns,you should be OK-even with a TXV. Regarding the scroll compressor, many times after a pull down for an evap changeout, your compressor is valved out of the loop when pulling a vac.
I just saw another thread where it said you can't pull a proper vacuum without using a micron guage. Does the guage somehow make the pump pull a better vacuum? Or is the guage really just letting you observe what your proper practice procedure is doing?
Most of the time it's not what you know, It's knowing where to find it!
very well said jp
When you pull a vacuum on the low side the TXV will throttle open, providing that it isn't defective. The forces acting on the seat are bulb pressure, suction pressure, and spring pressure. The bulb provides an opening force while the spring and low side pressure provide a combined closing force. So the TXV can only be closed when the sum of the low side pressure and spring pressure are greater than the bulb pressure. There is no issue with the compressor, you'll be pulling from the compressor case directly through the suction line, and from the discharge side through the suction line, evaporator coil, liquid line, and condenser coil. It's a long path, but those molecules are moving around at the speed of sound, so no problem.
JP - That is/was my point. I have never changed my procedure for pulling a vacuum. The Micron guage simply displays that what I was taught and have done for the last 38 years is one of the correct processes. But I am getting tired of people saying that the Micron Guage is what "allows" the proper vacuum to be pulled. It simply displays that a proper vacuum has been pulled. If you don't use one, you simply can't prove what you've done.
Most of the time it's not what you know, It's knowing where to find it!
Here's how it's done...
Don't pick the fly crap out of the pepper.