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Old 08-19-2012, 08:15 AM   #1
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? for the old timers. LOL


I understand that at one time refrigeration recovery bags were used with small appliance refrigeration recovery. In the 608 study guides there is mention made of using a vacuum pump as a recovery machine. This could only be done when using a non-pressurized container. The questions I have are (1) Are the recovery bags the "non-pressurized container" they speak of? (2) If that is true, how did they perform the procedure?
Thanks for any help you can offer.
Mike

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Old 08-19-2012, 09:32 AM   #2
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? for the old timers. LOL


Never used any myself. Just interested in the answer.

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Old 08-19-2012, 06:16 PM   #3
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? for the old timers. LOL


yes. those bags are considered a non-pressurized container. Sears techs.
used to use them years ago because back then the recovery machines
were expensive. the bags were about 4 foot square. On most small appliance the charge would be under a pound. The tech would use the bag and then take it back to the shop and then recover the bag. This way the
shop only needed one recover machine. On small appliances you only have
to recover 80% with a non operative comp. and 90% with an operative comp. also it says you dont need to carry a recover machine but have to have access to one. Now every one carries one because the price came down.
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Old 08-19-2012, 06:19 PM   #4
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? for the old timers. LOL


forgot to add. since the bag is 0 psig and the system has pressure, the flow of freon will go into the bag. the bag is large to have more volume
and you can get most of the freon out.
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Old 08-19-2012, 06:23 PM   #5
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? for the old timers. LOL


Sounds like B.S. to me Recovery was mandated in what... ? 1995.
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Old 08-19-2012, 06:36 PM   #6
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? for the old timers. LOL


remember, back then everybody and there brother was making recovery machines and the EPA handnt set any standards then. I have one i show
my class what they came up with back then. Serval Appliance still carries them. Heck, at work we bought what was called a Spouter II. all it was
was a bicycle pump with a schrader valve. never laugh so hard
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Old 08-19-2012, 06:51 PM   #7
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? for the old timers. LOL


hvac instructor, thank you for the information on the recovery bags. Seems crazy that a tech would be driving around with a huge bag of refrigerant in the back of the van,but I guess it worked. Have you any information on how a vacuum pump could be used during a passive recovery of a small appliance with a non-pressurized container? I can't imagine that I would ever need to know how it's done but I'm the curious type.
Mike
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Old 08-19-2012, 06:59 PM   #8
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? for the old timers. LOL


Quote:
Originally Posted by bobelectric View Post
Sounds like B.S. to me Recovery was mandated in what... ? 1995.
Check the link. The bags are still available. http://stores.recoverybags.com/-strs...sh-/Detail.bok

And then check this link. http://www.ebay.com/itm/Ozone-Saver-...-/120793555557

If you were really uptown you had a bag for your recovery bag. LOL
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Old 08-19-2012, 07:14 PM   #9
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? for the old timers. LOL


Quote:
Originally Posted by bobelectric View Post
Sounds like B.S. to me Recovery was mandated in what... ? 1995.
No more venting started in July 1992.
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Old 08-19-2012, 09:51 PM   #10
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? for the old timers. LOL


Mike, A vacume pump will be used to take an empty recovery tank and pull down into a vacume. Then you can take that tank to the small appliance
and hook up and the vacume will suck the freon out of the unit.If you take the vacume down to 30 inches.(it doesnt really get to 30 but We just say that. A perfect vacume is 29.92hg) on a 50# tank when the vacume sucks out the freon when its all done and equalized both tank and system will be about 10 in of hg. this saves time to recover in a customers house by just bringing in a tank and not the recover machine.
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Old 08-20-2012, 01:20 AM   #11
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? for the old timers. LOL


Never heard of them. Then who would take them and reclaim the freon?
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Old 08-20-2012, 05:36 AM   #12
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? for the old timers. LOL


You would take the bag back to the shop and transfer into a recover
cylinder. The bag is reusable. this way sears dont have to buy thousands of recover units. just a whole bunch of bags for all thier techs.

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