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[GMCnet] Duracool changeover [message #281809]

Fri, 10 July 2015 10:28

Advanced Concept Ener

Messages: 112
Registered: December 2014

Karma:

Senior Member

So about 1600 miles ago I had my AC coolant changed to 134a from R-12 and an auxiliary AC unit installed. System failed this weekend. I assume the old compressor couldn’t stand the extra head pressure from 134a. First no cooling and then 100 miles later belt broken and found wrapped around the fan. It worked fine on the way out. So I purchased a new compressor, new dryer, system flush agent and Duracool refrigerant, oil, leak sealant and and system drying agent. Have vacuum pump and just waiting for compressor to arrive. It has all new hoses and connectors.
I don’t see an expansion valve. Used to teach basic refrigeration to the UA and worked refrigeration on ship many years ago. Now all I work on is chillers greater than 1000 tons.
Looks like all I have to do is flush system out, change compressor, install new dryer, put in compressor pull vacuum,stand 24 hrs for leak down test, put in drying agent, pull vacuum again ,add new oil, put new refrigerant and startup and trim charge. I assume there is a restricter in line that acts like a capillary tube to isolate high from low side. Before I use the $600 in parts and supplies I was hoping for a little support that I am doing this correctly. Also not sure how much oil the rebuilt 4 seasons compressor comes with if any. Not sure how many oz of Duracool refrigerant I should be targeting as a charge. Remember I have the auxiliary cooling unit under the dash.
Would appreciate help from anyone who has put Duracool in a 134a system or at least has thought it through.

Jon Darcy
aces4nrg@gmail.com, 76 stretch. NJ, 4 airbags, Mac Dash, New Ken Frey motor, flares, Alcoas. plus plus plus

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[Message index]

		[GMCnet] Duracool changeover By: Advanced Concept Ener on Fri, 10 July 2015 10:28
		Re: [GMCnet] Duracool changeover By: tphipps on Fri, 10 July 2015 10:44
		Re: [GMCnet] Duracool changeover By: Bullitthead on Fri, 10 July 2015 10:53
		Re: [GMCnet] Duracool changeover By: USAussie on Fri, 10 July 2015 16:16
		Re: [GMCnet] Duracool changeover By: bhayes on Mon, 13 July 2015 00:29
		Re: [GMCnet] Duracool changeover By: Bullitthead on Mon, 13 July 2015 00:48
		Re: [GMCnet] Duracool changeover By: bhayes on Mon, 13 July 2015 22:37
		Re: [GMCnet] Duracool changeover By: Bullitthead on Tue, 14 July 2015 01:30
		Re: [GMCnet] Duracool changeover By: Bullitthead on Tue, 14 July 2015 01:35
		Re: [GMCnet] Duracool changeover By: jimk on Mon, 13 July 2015 00:42
		Re: [GMCnet] Duracool changeover By: bdub on Fri, 10 July 2015 10:50
		Re: [GMCnet] Duracool changeover By: Len Novak on Sun, 12 July 2015 15:14
		Re: [GMCnet] Duracool changeover By: Bruce Hart on Sun, 12 July 2015 21:20
		Re: [GMCnet] Duracool changeover By: A Hamilto on Fri, 10 July 2015 11:37
		Re: [GMCnet] Duracool changeover By: Jon payne on Fri, 10 July 2015 12:19
		Re: [GMCnet] Duracool changeover By: Keith V on Fri, 10 July 2015 12:40
		Re: [GMCnet] Duracool changeover By: A Hamilto on Fri, 10 July 2015 12:54
		Re: [GMCnet] Duracool changeover By: Tony Cook on Sun, 12 July 2015 23:10
		Re: [GMCnet] Duracool changeover By: jimk on Mon, 13 July 2015 00:16
		Re: [GMCnet] Duracool changeover By: USAussie on Mon, 13 July 2015 07:03
		Re: [GMCnet] Duracool changeover By: Tony Cook on Mon, 13 July 2015 09:06
		Re: [GMCnet] Duracool changeover By: Steve Stolley on Sun, 19 July 2015 16:40
		Re: [GMCnet] Duracool changeover By: jhbridges on Sun, 19 July 2015 19:28
		Re: [GMCnet] Duracool changeover By: JohnL455 on Sun, 19 July 2015 20:23
		Re: [GMCnet] Duracool changeover By: A Hamilto on Sun, 19 July 2015 21:25
		Re: [GMCnet] Duracool changeover By: USAussie on Sun, 19 July 2015 21:58
		Re: [GMCnet] Duracool changeover By: jhbridges on Mon, 20 July 2015 08:16

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