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Old 06-15-2008, 05:30 PM   #1
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1971 overlander ac unit

Is there a way to recharge the unit with freeon
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Old 06-15-2008, 05:32 PM   #2
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Depends on the unit. I think the original Armstrongs can be charged.
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Old 06-15-2008, 05:32 PM   #3
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Is there a way to recharge the unit with freeon
If it's the original Armstrong unit, the answer is "yes."

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Old 06-15-2008, 05:59 PM   #4
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You will need "R-22" for the recharge. It takes the older set (aka R-12) of gauges, and an household a/c guy to charge it. They have screw-together taps that they can use to recharge your system.
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Old 06-15-2008, 06:27 PM   #5
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I think the Armstrong's take the freon that is worth it's weight in gold
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Old 07-09-2008, 04:57 PM   #6
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If it's the original Armstrong unit, the answer is "yes."

Andy
How is it done? it only has a high side not a low side valve
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Old 07-09-2008, 05:36 PM   #7
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How is it done? it only has a high side not a low side valve
Your AC has a fitting for the low side, which is the larger of the two sizes of copper tubing within the unit.

If you indeed only have the fitting on the high side, then you have the only one ever built that way.

If an AC guy doesn't know how to recharge your AC, then you have the wrong AC guy.

The AC on your Airstream, is one of the simplest ever made.

Andy
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Old 07-09-2008, 06:35 PM   #8
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Your AC has a fitting for the low side, which is the larger of the two sizes of copper tubing within the unit.

Andy
So you don't need a fitting on the high side. If not how would you recharge it.

My ac guy recharges ac's on boats, and he said both are normally there?????
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Old 07-09-2008, 06:40 PM   #9
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So you don't need a fitting on the high side. If not how would you recharge it.

My ac guy recharges ac's on boats, and he said both are normally there?????
Any good AC guy knows that you recharge a system, through the low side, and that a high side fitting is nice, but not necessary.

I am not familiar with AC's are on boats, but I am familiar with the AC's that Airstream has used for 42 years.

Andy
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Old 07-09-2008, 07:32 PM   #10
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High and low side access valves are used together for system diagnostics, for a simple evacuation and recharge, the low side access is enough to do the job. Very simple procedure, make sure whoever does the job also does a leak check on the system. Their are several low cost replacements for R-22.
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Old 08-04-2008, 05:21 PM   #11
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What is the low cost replacement for the r22? I thought that you could not covert an ac system on any pull trailer like you can a car/vehcile. Is the replacement stuff a DIY type of thing? Has anyone ever used it and if so how does it work?
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Old 08-04-2008, 06:25 PM   #12
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What is the low cost replacement for the r22? I thought that you could not covert an ac system on any pull trailer like you can a car/vehcile. Is the replacement stuff a DIY type of thing? Has anyone ever used it and if so how does it work?
I am not aware of "any" replacement for R-22, let alone a low cost type.

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Old 08-08-2008, 05:31 PM   #13
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R-22 will still be available at reasonable cost until around 2010, and still used for re-charge purposes for several years after that. When I aid "low cost" in my last post, I was refering to the cost per lb., however, as an end user, you don't want to pay for a 35lb. can of refrigerant. Today, as I type this, R-22 is still easy to get, at least from an EPA licenced tech. Some of the replacements are as follows:
NU-22, R-404A, R-407C, R-417A, R-421A, R-422B, R-422C, R-422D, R-424, RS-45, R-125, RS-44, R-424A, the list goes on, but you get the picture, my point being that some tech person near you will likely have at least one of these refrigerants to use on your system, without having to charge you for a special purchase of a minimum quanity of another type of refrigerant.
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