ReplyThen you need to get yourself one of these http://www.testequipmentdepot.com/ro...uum/14010a.htm !!Originally Posted by hvaclover
Yes
Nope, we don't own one.
Professional Member*
You bet it's NATE approved Tranducer and I also did a Manual D on it so I know it's right.
__________________________________________________ _______________________
Experience is a hard teacher because she gives the test first, the lesson afterwards" ~ Vernon Law
"It's what you learn after you know it all that counts." ~ John Wooden
"When the teachers become unteachable we're all in trouble" ~ Mr. Bill
"Remember "Pro" is only a name, it's not always a mindset determined to do everything correctly" ~ Mr. Bill
Professional Member
Then you need to get yourself one of these http://www.testequipmentdepot.com/ro...uum/14010a.htm !!
No return.
Efhardystou.
I had the anolog version of that Robinaire when I did refer. Never used on an A/C cause it was considered over kill(30 years ago. So don't beat me up because attitudes were different then).
Thing had a monstrous vacuum tube thermistor sensor and a big scale and meter movement.
Thanks.
Regular Guest
to those of you who dont use them........your not doing a very good job! 30" of HG is a long way from 500 microns, this you would never know by just using your gauges. under 500 microns is where you want to be to have all the moisture out of the system. The old 1000 microns is good enough just wont fly anymore.
Professional Member*
+1 for that opinion.
If you don't/won't use a micron gauge, do everyone a favor and find a new trade.
Professional Member
LOL,thats funny even if beenthere said it....Which is twice a year weather the system needs a vacuum or not.
ROFL
Look to the past to learn;look forward to live.
Coach Dean E. Smith
Professional Member
I guess when you measure "it" in microns it sound a lot bigger!!
Last edited by Snoring Beagle; 06-22-2008 at 07:40 AM.
Expect nothing, yet expect the unexpected.
Press on Regardless, Endeavor to Persevere.
Professional Member
i use it everytime the system is opened and i EVEN change the oil in my pump
God Speed, Jim. We'll miss you - 2-26-23
Yea, 30"hg is a lot lower then 500 microns.
Professional Member*
...not to mention 30"hg of vacuum is an impossibility. If a "technician" trusts the needle on his/her compound guages to be zeroed perfectly and totally accurate then they are not a technician.
God Speed, Jim. We'll miss you - 2-26-23
Or just mislead by the people that were training them.
30"hg, would be a perfect vacuum. And 500 microns is a long way from a perfect vacuum.
Professional Member*
True.
Professional Member
At least this pole shows a good thing, over 90% of pro's here are using micron gauges.
No return.
How many of you guys put on a filter drier when you seal up the system?
Seen a lot of guys pulldown to a good vacuum but no filter..
Attitude was if it needed one the factory would have provided one.
Professional Member*
I never heard of a micron guage until 410a. use it every time because i no longer will install r-22.
Professional Member
Always, if not factory provided
No return.
No offense, but contaminents are removed by a good flushing (acid, oil sludge, stuff like that) a vacuum pump will remove air along with moisture and non condensibles.
Last edited by hvaclover; 06-22-2008 at 11:36 AM.
Professional Member
we mandate that every time a system is open a new filter dryer is installed.
Professional Member*
And that ok Buddy we all started somewhere unlike some here that will make you feel so bad and belittle folks because they were born with a micron gauge in there butt and a NATE certificate in there hand and a Sling Psychrometer in there teeth. Rather than putting folks down here that haven't used these few tools of the trade we "Pro's" should be encouraging old and new Pro's that haven't been using these tools how these tools can be beneficial to them in servicing a/c equipment. I guess instead of the sarcasm and put downs use our knowledge and experience and treat these folks as students and teach them as any good teacher should, remember none here knows it all anyway, but if we all work "together" we can all gain knowledge from one another, "maybe" even something we did not know, just my two cents.
__________________________________________________ _______________________
Experience is a hard teacher because she gives the test first, the lesson afterwards" ~ Vernon Law
"It's what you learn after you know it all that counts." ~ John Wooden
"When the teachers become unteachable we're all in trouble" ~ Mr. Bill
"Remember "Pro" is only a name, it's not always a mindset determined to do everything correctly" ~ Mr. Bill
No return.
Whole new thread. But you're right, 410 will MANDATE micron guages usage.
And holding a neagative press for leak detection will become problamatic.
410A driers are so much more hygroscoic you stand to contaminate the drier if you have a leak with the systeem under vacuum.
I think that $400 Robinaire micron tester is for me.
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