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Old 08-09-2016, 07:59 AM   #1
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A/C help

Can anyone tell me how much freon it takes for a 40ft alpine coach with a 400hp cumin eng thanks you can also call me at 612 812 3104
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Old 08-09-2016, 10:30 AM   #2
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There should be a data tag some where in the engine bay or near the evaporator with the manufacturers data and a refrigerant charge.

I have many years experience and charge using the gauges. I do not recommend an inexperienced person take on the job of recharging a high pressure refrigerant. It can be very dangerous and often, an inexperienced person will do more harm than good.

Ken
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Old 08-12-2016, 07:45 AM   #3
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Hot-Rodder 555
Having been an A/C tech for a number of years, I can offer this advice. You will be dealing with the low pressure side. When running, the pressure should read somewhere between 30 to 50 lbs. Buy a recharging kit that has a built-in pressure gauge. you will be using the 12 oz. cans of refrig 134. The recharge hose end will have a quick connect fitting. Connect to low pres. side and begin charging. The most cautious way to charge is to keep the can upright so as not to allow liquid ref. to enter system which can "slug" the compressor, causing valve damage. This will take a little time, you could need more than one can, no more than two. Have someone in the MH watching a dial thermometer stuck in an outlet grill. Have the A/C controls set to max air and recirculate. Depending on the temp. in the cab, you should end up with outlet temps somewhere between 45 to 55 degrees. This is the quick and dirty (cheap) way to recharge your engine driven A/C. The alternative is to take it to an automotive A/C shop, where they will evacuate the system, to check for leaks, and give themselves a starting point, then fill the system with the exact number of ounces of refrig. called for on the system specs., if they can find them. Take money.
Dudley Do Right, 2006AlpineApex40MDTS
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