Question about Dometic Rooftop RV Air Conditioner

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Can you tell me what type of refrigerant is in my a/c it is a 15 k btu dometic brisk air roof top unit and is about 4-5 years old.I can't find it on the unit also how much will it hold and if its not 134 a can it be converted

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  • Ken Bledsoe May 11, 2010

    Really hard to tell what kind of refrigerant is in unit I would think R22 and it should have a data plate might have to take off the top protective cover to see data plate. On the data plate it will tell you type and amount that inside the unit.

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USUALLY its R22. DO NOT USE ANY REFRIGERANT TIL YOU KNOW IT NEEDS IT THOUGH. The plate is usually inside the top cover and you can read it after removing the cover. If its a 110or 220 AC unit Im almost sure its R22. And the weight listed will be the most you should try to put in it. BUT before you do that you have to put on a piercing valve. And the pressures are higher for R22 than R134A. It will ofcourse depend on the outdoor and indoor temps as to what pressures youll be running as well as fan speed. Freezing is 57-58psig on R22 so the pressure after ruinnign 10 to 15 minutes has to be greater than 57 or 58 PSIG. It is normal for some units to run for a while at a lower pressure when 1st started though so dont jump the gun.

Posted on Mar 02, 2009

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