Home » Public Forums » GMCnet » Dash A/C recharge (Air Conditioning)
| Re: [GMCnet] Dash A/C recharge [message #88826 is a reply to message #88773] |
Wed, 16 June 2010 11:28   |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
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Emery
I'm going to have to disagree on that one. There was no 12 or 134 in the system of the 4 runner it was all evacuated. 20 lbs suction pressure of Duracool in the system left me with an evaporator that was not operating at its rated capacity. In other words it was short of charge. If you check the vapor pressure chart Duracool is around 8 degrees coil refrigerant temp at 20 lbs. 134 would be around 12 degrees. At 30 lbs suction the temp is around 20 deg for the Duracool and 28 for 134 which shows the Duracool is more efficient as far as cooling goes but my 4 runner needed more charge to fill the coil to capacity. The small amount of 134 added to the Duracool only amounts to 2 or 3 lbs of pressure difference between all Duracool or a mix. The actual coil air temperature is definitely higher then the refrigerant temp depending on the amount of air moving thru the coil. It is generally not in ones best interest for the coil fins to be below freezing or the coil will start to ice up especially in humid areas of the country. This is what happens when people set there home or business thermostats below 68 degrees. Many times I had to add an evaporator temperature control like in the GMC so I wouldn't have to come back and defrost these units. I am sure when you charged systems to 20 lbs suction pressure the suction line was cold and sweating or you would have been under charged. We all know the GMC doesn't move a great amount of air thru the evap coil in stock form. This will relate to a lower suction pressure with a fully charged system. A fully charged 134 system would have a suction pressure higher then 12 and 12 would be a little higher then Duracool but the airflow thru all of them will have an effect on the final suction pressure and air temperature leaving the coil.
Roy
Roy Keen
Minden,NV
76 X Glenbrook
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Dash A/C recharge
By: MikeT on Sun, 13 June 2010 17:44 |
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Re: Dash A/C recharge
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Re: [GMCnet] Dash A/C recharge
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Re: [GMCnet] Dash A/C recharge
By: MikeT on Sun, 13 June 2010 18:30 |
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Re: [GMCnet] Dash A/C recharge
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Re: [GMCnet] Dash A/C recharge
By: MikeT on Sun, 13 June 2010 19:02 |
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Re: [GMCnet] Dash A/C recharge
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Re: [GMCnet] Dash A/C recharge
By: MikeT on Mon, 14 June 2010 07:36 |
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Re: [GMCnet] Dash A/C recharge
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Re: [GMCnet] Dash A/C recharge
By: Keith V on Mon, 14 June 2010 09:50 |
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Re: [GMCnet] Dash A/C recharge
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Re: [GMCnet] Dash A/C recharge
By: Keith V on Mon, 14 June 2010 11:43 |
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Re: Dash A/C recharge
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Re: Dash A/C recharge
By: rgf on Mon, 14 June 2010 22:14 |
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Re: Dash A/C recharge
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Re: Dash A/C recharge
By: Rusty on Tue, 15 June 2010 09:16 |
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Re: Dash A/C recharge
By: ggroth on Tue, 15 June 2010 12:15 |
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Re: Dash A/C recharge
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Re: Dash A/C recharge
By: roy1 on Tue, 15 June 2010 19:19 |
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Re: Dash A/C recharge
By: ggroth on Wed, 16 June 2010 15:16 |
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Re: Dash A/C recharge
By: Rusty on Tue, 15 June 2010 17:30 |
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Re: Dash A/C recharge
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Re: Dash A/C recharge
By: roy1 on Tue, 15 June 2010 20:09 |
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Re: [GMCnet] Dash A/C recharge
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Re: [GMCnet] Dash A/C recharge
By: roy1 on Tue, 15 June 2010 21:38 |
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Re: [GMCnet] Dash A/C recharge
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Re: [GMCnet] Dash A/C recharge
By: roy1 on Wed, 16 June 2010 11:28 |
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Re: [GMCnet] Dash A/C recharge
By: roy1 on Thu, 17 June 2010 22:06 |
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Re: [GMCnet] Dash A/C recharge
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Re: Dash A/C recharge
By: Rusty on Wed, 16 June 2010 04:58 |
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