Good Sam Club Open Roads Forum: Class A Motorhomes: Freon capacity
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wa8yxm

Wherever I happen to park

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Posted: 01/13/19 05:07pm Link  |  Quote  |  Print  |  Notify Moderator

dougrainer wrote:

1. 134a NOT Freon[emoticon]o much starts a lack of cooling and the output temp starts to raise.


Doug... You beat me to it.. Thanks.


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wvabeer

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Posted: 01/15/19 09:55am Link  |  Quote  |  Print  |  Notify Moderator

I would think 3 lbs might be too much. If its cooling leave it alone. Wait and see how it does on a hot day. Look at other trucks like yours and see the refrigerant capacity


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RLS7201

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Posted: 01/15/19 12:53pm Link  |  Quote  |  Print  |  Notify Moderator

With that amount of charge and those pressures, you probably have a restriction at the expansion valve. Assuming you have the system on outside air and high speed blow. A restriction between the receiver/dryer and the compressor will cause low pressure, as all the refrigerant will be stored in the condenser and dryer, leaving the compressor nothing to pump. Most likely you will find the expansion valve screen restricted. Refrigeration 1 oh 1.
And while I'm on a roll, I would like to expand on what Doug said about "Freon". "Freon" was a DuPont trade mark and defines no chemical. Using Freon to define any refrigerant only shows lack of training and knowledge in the refrigeration world.


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* This post was edited 01/15/19 01:29pm by RLS7201 *


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chuckftboy

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Posted: 01/15/19 04:56pm Link  |  Quote  |  Print  |  Notify Moderator

Freon was Dupont's trade name for R-22 refrigerant. Much Puron is Carrier's trade name for R410A refrigerant. A lot of people refer to all refrigerants as Freon much like people calling all tissues, Kleenex. Its actually all refrigerant even R134A.


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dougrainer

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Posted: 01/16/19 06:10am Link  |  Quote  |  Print  |  Notify Moderator

chuckftboy wrote:

Freon was Dupont's trade name for R-22 refrigerant. Much Puron is Carrier's trade name for R410A refrigerant. A lot of people refer to all refrigerants as Freon much like people calling all tissues, Kleenex. Its actually all refrigerant even R134A.


True. Funny thing is, NOBODY refers to any Motorhome anymore as "WINNEBAGO'S". Good news is, you CANNOT install Freon 12 in a 134a system, even if you could still find Freon 12. Reverse is true. They have totally different hose connections. Doug

crawford

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Posted: 01/28/19 04:10pm Link  |  Quote  |  Print  |  Notify Moderator

really you would be lucky to find 12 and if so maybe a 16 oz coast maybe 260 dollars it would be a costly change over ever if it could be done which it could not'


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JimD10796

Haughton,La

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Posted: 01/29/19 08:56am Link  |  Quote  |  Print  |  Notify Moderator

At 70 ambient, pressure should be low side 35-40 and high side 145-160psi. IMO possible blockage in expansion/orfice, which should be replaced as well as the drier anytime the system is open.

GTO66

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Posted: 01/29/19 09:51am Link  |  Quote  |  Print  |  Notify Moderator

R-12 price has seemed to drop as less vehicles are around that use it. The last two cans I bought I got for $15. each compared to 30. or higher a few years back. R-22 is still up there in price, but that to should fall as more home units are replaced.

crawford

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Posted: 01/29/19 04:16pm Link  |  Quote  |  Print  |  Notify Moderator

R 12 can not be gotten with out a license It has not be product in 15 years you must be buying R-134a refrigerant. No car or truck since 92 had R12 I believe.

RLS7201

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Posted: 01/29/19 05:40pm Link  |  Quote  |  Print  |  Notify Moderator

crawford wrote:

R 12 can not be gotten with out a license It has not be product in 15 years you must be buying R-134a refrigerant. No car or truck since 92 had R12 I believe.


Ebay & Amazon sell R12 to the general public all the Time.

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