I don't understand why they don't do the vacuum test first before the soap test. If the vacuum doesn't lower, you save yourself a step no? It seems redundant to do both. They will both tell you if there is a leak, the soap will just show you where the leak is but takes more time. So vacuum first, if it's ok move on. Seems a little more logical to me, but then again I'm not a tech so...
a vacuum test can hold to 30 inches of vacuum... which is about 15 psi.
lets say R-22 running pressure on the high side is about let's say 245 psi the pressure is a big difference right. there are also different types of leaks in the hvac system. temperature leaks, pressure leaks, system dependant leaks and so on. so even though you say why do the vacuum test before the soap test why would you want noncondensables in the system. you can put nitrogen150psibubblecheckpurgePVCHARGE
oil cost $1.24 per gallon and is rated at 130,000 Btu per gallon.The boiler efficiency is assumed at 75 percent. The steam required is 20 pounds per hour per ton of refrigeration produced, and the heat required to evaporate water is 950 btu per pound. Assume the electrical requirements to be 0.03 kw per ton and the cost to be $0.06 per kwh. compute the opperating cost in dollars per ton per hour due to elctricity usage
triple vacuum is just putting nitrogen into the system 3 times but after each time you pull vacuum for a good amount of time each and also leak check from time to time
I don't understand why they don't do the vacuum test first before the soap test. If the vacuum doesn't lower, you save yourself a step no? It seems redundant to do both. They will both tell you if there is a leak, the soap will just show you where the leak is but takes more time. So vacuum first, if it's ok move on. Seems a little more logical to me, but then again I'm not a tech so...
kwakman99 8 months ago
@kwakman99
a vacuum test can hold to 30 inches of vacuum... which is about 15 psi.
lets say R-22 running pressure on the high side is about let's say 245 psi the pressure is a big difference right. there are also different types of leaks in the hvac system. temperature leaks, pressure leaks, system dependant leaks and so on. so even though you say why do the vacuum test before the soap test why would you want noncondensables in the system. you can put nitrogen150psibubblecheckpurgePVCHARGE
Destinknee 2 months ago
Clear silicon is the best to stop leaks put on the male tread.
Capitancanguro1 1 year ago
please really need help
oil cost $1.24 per gallon and is rated at 130,000 Btu per gallon.The boiler efficiency is assumed at 75 percent. The steam required is 20 pounds per hour per ton of refrigeration produced, and the heat required to evaporate water is 950 btu per pound. Assume the electrical requirements to be 0.03 kw per ton and the cost to be $0.06 per kwh. compute the opperating cost in dollars per ton per hour due to elctricity usage
alfebre1 1 year ago
What a waste of nitro, lol.
I just throw a holding charge of 22 in and run a halide lamp over the connections.
This is on an empty system of course, 22 will give me 260lb which is heaps high for even the smallest leaks.
Vac it all out, and charge by sight glass (commercial), plate condition, or suction pressure @ 12lb (domestic).
One thing i do hate though ---- 134a, its a shit of a gas. There use to a gas called Isceon 49, was the best ever.
Good vidoe mate.
Cheers.
dwsnare 2 years ago
he does not show you to use the triple vac technique and this is more accurate to totally ensure complete vac of the system.
and thats not a bad bit of kit either lol rather than have a vac and a reclaim machine and all seperate bottles haha jammy get
thebeatricealpha 3 years ago
@thebeatricealpha
triple vacuum is just putting nitrogen into the system 3 times but after each time you pull vacuum for a good amount of time each and also leak check from time to time
Destinknee 2 months ago
thank you
moulayll 3 years ago
29in-Hg=~14psi
profuse007 3 years ago