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jhcain posted:OK, I need some expert advice. Did you run the system at all while you were charging it? Depending on what side you're feeding into the pressure in the system can exceed that in the can. So if you're feeding on the high side alone it won't take the whole charge, so you have to feed into the low side til you can run the compressor and get lower pressures in the system. At which point you can charge by your pressure/temp chart. Make sure if you're feeding it in a liquid you do it in shots, so as to not slug the compressor. And you will need a proper set of high and low gauges.
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May 31, 2014 02:01
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| # ¿ May 14, 2024 05:11 |
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Motronic posted:There is no reason to do this on a running system. And it's actively hazardous. I never said you feed into the high side while it's running. Given standard operating pressures you wouldn't be able to do that anyways. You're never going to get a 70psi can to charge into a 130psi line. I mean if he's feeding into a perfectly vacuumed empty system. Cause at that point it really doesn't matter when you're working with vapor, unless you have a TXV. And feeding liquid into the low side really isn't that uncommon, and it's quite simple to do. I've done it plenty of times on on a variety of equipment in the classes I've been taking. You fill the hose with liquid, and only the hose, then cut off from the can, and charge slowly into the suction side. Watch you're pressures, and repeat as necessary. Like I said, you do it in shots, so as not to slug the compressor. E. After a quick Googleing it looks like the Classic system does come with a TXV, so it might be a problem with that not being able to sense the suction line temp and throttle the refrigerant. When you were installing the system, did it tell you where to place the sensing bulb for the TXV? ExplodingSims fucked around with this message at 02:53 on May 31, 2014 |
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May 31, 2014 02:33
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Motronic posted:Look no offense, but you've admitted to being class for this. This denotes a lack of real world experience. No offense taken, but my teachers are both techs who've been in the field since they were like 17, so I think it's pretty good info. Plus we do actually do a lot of work on all kinds of systems. And yes, you probably won't be using the liquid charging method much in this context, unless like you said, he's using an azeotropic.
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May 31, 2014 03:08
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DJ Commie posted:That'd be it. Are there adapters for sale somewhere or should I try to buy that single hose for my gauge set? Yeah, I ran into the same problem on my Jeep, luckily they're not at all hard to find. Take your pick: http://www.ebay.com/sch/i.html?_sacat=0&_nkw=r12+high+side+adapter&_frs=1 E. @Darchangel, I've never seen anything quite like that, but jeep seems to like to do questionable things. My '92 Cherokee used king valves on its setup for some reason. ExplodingSims fucked around with this message at 05:26 on Jul 3, 2014 |
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Jul 3, 2014 05:22
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Nitrogen would be the ideal setup, yes. You don't really want to use compressed air due to the moisture in it, but I guess if you're going to vacuum it out anyways though air won't be the end of the world.
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Mar 14, 2015 00:07
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PaintVagrant posted:Is there a way to clean the evaporator? I don't think there's any easy way to get to the evap in a car, but they do make an areosol evap cleaner you can try and spray in the box if you feel like taking half your dash apart. It just sprays on, and the condensate washes it off over time.
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Jul 13, 2015 00:02
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FatCow posted:If it was a blockage wouldn't the low side be low? If it's a TXV not modulating properly, or a blocked dryer or something, then no. It'll still let gas though, but it won't be flashing off properly. Also 45psig is on the higher side for your suction line, so sounds like a restriction for sure. Or your condenser fan isn't running. Soup in a Bag posted:The A/C in my girlfriend's 2007 Chevy Aveo 5 does not cool at all. I borrowed a gauge set from Auto Zone and the static pressure is correct and close to the same on the high and low sides, but the low side is a little higher than than the high side. The high side shows the right pressure for 92º, but the low side is pointing toward about 96º. Is that enough difference to mean there's probably an obstruction? It's near the top of the low side's range so it's harder to tell the exact temp it's lining up with, but it's definitely higher than 92º. The car had been off for around 2 hours at that point and the A/C has never been serviced before. Are you sure the compressor clutch is engaging? Because unless you just don't have your gauges on there right, then you should see at least a little compression while it's running. ExplodingSims fucked around with this message at 03:12 on Jul 17, 2015 |
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Jul 17, 2015 03:10
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Your getting a pressure drop because your raising the subcooling with the additional fan. Better cooling = more liquid flow = lower pressures.
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Jun 5, 2016 00:16
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| # ¿ May 14, 2024 05:11 |
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It's totally possible for the cap to go bad within a year. For the most part they're not all that long lived. FYI from experience in the field AMRAD or Titan are the best capacitors.
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Jul 16, 2016 01:29
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