I show how to connect and purge hoses when recovering refrigerant from an a/c system. Please do not be confused by the R-410A gauges. My R-22 gauges were broken and I was forced to use my R-410A gauges.
Hey’ don’t get me wrong, Not picking on anyone ok? Although might appear that way to you, I was just injecting proper procedure and very condensed I will say.
I will admit I am very specific in way I do procedures such as above. My field of expertise over years has taught me that, and anyone in HVACR trade knows you are always on a learning curve. Just trying to add more info to his lesson. have a nice day.
once refrigerants are in recovery tank they are mixed with other refrigerant from prior customers. cannot transfer back to current system. Also should wait 15 min or so after evacuation to see if micron level rises above 500 to very leak free.
Hey! Where are the low loss fittings?! Do u wanna kill our Ozone Layer? You’re violating EPA’s section 608! Did u know that there is a big reward for turning u in? I’m not gonna do that but… u better get them. Recovery cylinder is not DOT approved as well - yellow top and should be GRAY body. Have a good one
Thats why you always charge a txv system by subcooling, so you insure you always have liquid available for the txv. You can adjust superheat on some expansion valves but you never charge it by super heat.
because the txv takes time to adjust to different condistions so if you install a brand new system on a 90 + derg. day more than likely you will add more freon than needed to get the 12/14 derg. SH
I’m in the HVAC Business and i’ve been told that if you have a TXV it’s best to do subcooling and if you have a piston charge by superheat. I think that 10 degrees of subcooling on most 410a systems is the sweet spot. I’ve found that doing superheat you can easily OVER CHARGE the system “TXV” metered
410A systems are tolerable of some residual mineral oils. 5% is the magic number . A good flush is always good practice but lineset replacement is not always essential for upgrading to puron(410-A)
I do recommend that you replace your line set, especially if the new system calls for a larger suction line. However, you can use the existing line set if you flush it out really good with a flushing system like Pro-Flush by DiversiTech.
I plan to replce my R22 system with R410A system. Do I need to replace the lineset? I check the new R410A unit and it uses the same size of lineset. Any product I can use to flush the residual oil in lineset without changing to new lineset?
October 7th, 2009 at 6:05 pm
The data label on the side of the unit has that information.
October 11th, 2009 at 1:55 am
dr z. how did you know you need 160 oz of refrigerant
October 13th, 2009 at 10:40 pm
hey you video how to charge R- 410 a
October 15th, 2009 at 5:20 pm
liquid side
October 18th, 2009 at 5:46 pm
Hey’ don’t get me wrong, Not picking on anyone ok? Although might appear that way to you, I was just injecting proper procedure and very condensed I will say.
I will admit I am very specific in way I do procedures such as above. My field of expertise over years has taught me that, and anyone in HVACR trade knows you are always on a learning curve. Just trying to add more info to his lesson. have a nice day.
October 19th, 2009 at 9:08 am
ok, if recovery cylinder is empty and not contaminated then you could reuse. only then.
October 21st, 2009 at 12:58 pm
once refrigerants are in recovery tank they are mixed with other refrigerant from prior customers. cannot transfer back to current system. Also should wait 15 min or so after evacuation to see if micron level rises above 500 to very leak free.
October 21st, 2009 at 3:24 pm
Dr. Z spent time to show us how to do it, be nice and don’t pick on him.
October 24th, 2009 at 7:34 pm
I don’t like to reuse old refrigerant.
October 25th, 2009 at 5:00 pm
good luck
October 25th, 2009 at 11:43 pm
You didnt have to charge it with a new tank of 22. Why didnt you charge it with your recovery cylinder???? dont make no sense
October 28th, 2009 at 6:17 am
I hope he kills u instead of the ozone layer
October 31st, 2009 at 8:47 am
Hey! Where are the low loss fittings?! Do u wanna kill our Ozone Layer? You’re violating EPA’s section 608! Did u know that there is a big reward for turning u in? I’m not gonna do that but… u better get them. Recovery cylinder is not DOT approved as well - yellow top and should be GRAY body. Have a good one
November 3rd, 2009 at 7:07 am
good video, ur kinda **** too
November 5th, 2009 at 3:38 pm
Thats why you always charge a txv system by subcooling, so you insure you always have liquid available for the txv. You can adjust superheat on some expansion valves but you never charge it by super heat.
November 7th, 2009 at 11:21 am
you can use Rx11-flush
November 9th, 2009 at 8:57 am
just can’t re use r-12 once you have to make a repair you must convert or get a new system
November 9th, 2009 at 11:31 am
because the txv takes time to adjust to different condistions so if you install a brand new system on a 90 + derg. day more than likely you will add more freon than needed to get the 12/14 derg. SH
November 12th, 2009 at 1:05 pm
I’m in the HVAC Business and i’ve been told that if you have a TXV it’s best to do subcooling and if you have a piston charge by superheat. I think that 10 degrees of subcooling on most 410a systems is the sweet spot. I’ve found that doing superheat you can easily OVER CHARGE the system “TXV” metered
November 14th, 2009 at 2:50 pm
410A systems are tolerable of some residual mineral oils. 5% is the magic number . A good flush is always good practice but lineset replacement is not always essential for upgrading to puron(410-A)
November 16th, 2009 at 8:15 am
I do recommend that you replace your line set, especially if the new system calls for a larger suction line. However, you can use the existing line set if you flush it out really good with a flushing system like Pro-Flush by DiversiTech.
November 16th, 2009 at 10:21 am
Dr Z,
I plan to replce my R22 system with R410A system. Do I need to replace the lineset? I check the new R410A unit and it uses the same size of lineset. Any product I can use to flush the residual oil in lineset without changing to new lineset?
Thanks
November 18th, 2009 at 5:55 pm
Not as long as it’s clean.
November 20th, 2009 at 1:59 am
isnt there a code against reusing reclaimed refrigerant?