Raise the pressures equally. Avoid putting too much pressure on one side or the other.
This also applies to valve plates, Scroll check valves everything.
I have had thus question for a while and never got around to ask anyone.
On a system with a hard lockout TXV (I think that is what it is called), when putting nitrogen in a system to leak test through the liquid line, the low side stops at around 200 psi. Should I then open the suction side on the gauges to equalize the pressure so I have 400 psi on both sides? This would be for a 410a heat pump? Or an I going to hurt the TXV?
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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Raise the pressures equally. Avoid putting too much pressure on one side or the other.
This also applies to valve plates, Scroll check valves everything.
R I P Icemeister
Supporting our Vet’s
http://www.soldierride.org/
http://www.woundedwarriorproject.org/
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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Open both your gauges all the way and turn on the nitrogen tank.
i also open bot gauges all the way and let the nitrogen flow in slowly, but not going up to 400 PSI
i stop at 250
nope i'm not go that high LOL
250 is the limit period
What if your leak doesn't show up till 300# ?
i do residential up to 5 tons
pressure switches txv coils and compressor valve
no need to go to 600 psi
not me
When its a heat pump. Put the nitrogen in through the vapor side. The TXV is only hard shut off in cooling mode. It will still let nitrogen flow from the vapor side to the liquid line.
Whats your concern?
See Step 18:
https://portal.fujitsugeneral.com/fi...ll%20Guide.pdf
R I P Icemeister
Supporting our Vet’s
http://www.soldierride.org/
http://www.woundedwarriorproject.org/
I was trying to find a leak on a 3 head mini split. Finally found it in a flair fitting. It took 400 psi to make it bubble. I left it with 200 psi for 2 days with no change
“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
"Better tell the sandman to stay away, because we're gonna be workin on this one all night."
"Dude, you need more than 2 wires to a condenser to run a 2 stage heatpump."
"Just get it done son."
Dad adjusted
everybody talking about mini split and VRF
can you imagine 600 psi on a York micro channel coil ?
they leak just if you look at them LOL