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Still need to test conventional equipment at pressures similar to those it will be exposed to while operating.
Now that said watching the micron level during evac will be the true end test, but 250 psi test pressure on equipment capable of over 400 psi during normal operation is a bit too low.
“I haven’t failed. I’ve just found 10,000 ways that won’t work.” - Thomas Edison
“It’s not whether you get knocked down, it’s whether you get up.” - Vince Lombardi
"In this house we obey the laws of thermodynamics" - Homer Simpson
Local 486 Instructor & Service Technician
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Originally Posted by
AIRCON8
can you imagine 600 psi on a York micro channel coil ?
they leak just if you look at them LOL
B S
What's the difference between 600 #'s N2 and 650 R-410A with a bad cond fan, overcharged Heat Pump?
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Still not going there
250 psi its my limit period LOL
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Originally Posted by
AIRCON8
Still not going there
250 psi its my limit period LOL
So you don't follow Manufactures Recommendations and Best Industry Practice's.
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Originally Posted by
AIRCON8
Still not going there
250 psi its my limit period LOL
Why?
“I haven’t failed. I’ve just found 10,000 ways that won’t work.” - Thomas Edison
“It’s not whether you get knocked down, it’s whether you get up.” - Vince Lombardi
"In this house we obey the laws of thermodynamics" - Homer Simpson
Local 486 Instructor & Service Technician
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Originally Posted by
pecmsg
So you don't follow Manufactures Recommendations and Best Industry Practice's.
exactly
250 and triple vacuum
that's it
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Look...………………...
Were all here to learn. Please explain or post documents on why you wont follow the manufactures recommendations.
Maybe you know something we don't.
Do you flow N2 while brazing?
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OK
I'll go first
From this Document on Micro Channel Condensers:
https://www.cantas.com/urunpdf/sanhu...hannel_cat.pdf
Page 12 R-410A Refrigerant
Operating Pressure 4.5 mPa or 652 PSIG
Burst Pressure 13.5 mPa or 1,958 PSIG
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I use the standard of whatever the manufacturer states in their literature. Or at least I try to.
But everyone has their own experience. As long as it works for you and doesn't cause problems, you should keep doing it.
Just my opinion.
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Originally Posted by
joemach
I use the standard of whatever the manufacturer states in their literature. Or at least I try to.
But everyone has their own experience. As long as it works for you and doesn't cause problems, you should keep doing it.
Just my opinion.
The only problem I have with that is Others that don't know read this and think its OK.
Not flowing N2
Additives
Topping off charges with different refrigerants.
The list of Misinformation and or Bad information continues to grow instead of diminishing!
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Originally Posted by
joemach
But everyone has their own experience. As long as it works for you and doesn't cause problems, you should keep doing it.
Just my opinion.
But it might not be working for him by not using the higher pressure when acceptable.
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Originally Posted by
joemach
I use the standard of whatever the manufacturer states in their literature. Or at least I try to.
But everyone has their own experience. As long as it works for you and doesn't cause problems, you should keep doing it.
Just my opinion.
i agree. LOL
Finally someone taking my side LOL
yes i flow nitrogen when I'm brazing and yes i do 3 vacuum
and again i don't install VRF with hundred of brazing, YOU have to do 2 brazing on condenser and 2 on a/h.
if you are confident with your brazing you don't need 600 psi
Thats it.
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I usually do 75-100 lbs, then soap my braze joints. The reason being that at 200+ lbs a small leak will just blow the bubbles away and I will not see them. Once I am satisfied with no leaks, I then pump up to manufacturer's recommended pressure.
I figure there was a reason someone included the install manual with the equipment.
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Originally Posted by
pecmsg
3 Vacuums?
triple vacuum
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Originally Posted by
AIRCON8
triple vacuum
How many microns?
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I don’t always pressure up to 400 psi.
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Usually 200 is sufficient
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The Leak Detection manual from refrigeration Technologies is a must read at least once.
Sent from mars using Tapatalk
"Is this before or after you fired the parts cannon at it?" - senior tech
I'm tired of these mediocre "semi flammable" refrigerants. If we're going to do it let's do it right.
Unless we change direction we are likely to end up where we are going.
"It's not new, it's better than new!" Maru.
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Originally Posted by
R600a
The Leak Detection manual from refrigeration Technologies is a must read at least once.
Sent from mars using Tapatalk
A lot of manuals need to be read!
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