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Saguaro
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« on: April 12, 2006, 02:59:27 pm » |
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After my refrigeration buddy told me that my compressor starter relay may be bad, I followed the advice of an SMC poster and put on a Supco 3-in-1 and now the compresor stays on. Now, I know why the thermostat may not be turning off the compressor, but it runs for a long time. What I was wondering is how hot is too hot for a compressor. Within 20 minutes the compressor is way-too-hot for the touch. I got the overtemp switch on there and I know that it works (I tested it with a ohm meter and a heat gun). I'm also wondering at what temp this switch is suppose to trip at. The compressor is a 1/4hp r12 system on a Choice Vend CVC-223, probably about 25-30 yrs old. Let me know what you think.
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globalcompressors
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« Reply #1 on: April 12, 2006, 06:18:24 pm » |
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Do you know what the amp draw is, on the compressor, when running? Check each leg and let us know. Make sure all fan motors are running. Make sure both coils are completely clean and clear. On start up, with a hot box, the compressor will run it's longest, trying to bring the temperature down. A hot compressor is common during this phase. Once box reaches normal running temperature, about 30-40 minutes, then the compressor will begin to cool off, as it cycles on and off. Also, make sure you have the correct sized 3 in 1. One too small can cause problems.
Eric  '>
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how's that OBAMA CARE workin' out for ya?
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Saguaro
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« Reply #2 on: April 13, 2006, 01:24:00 am » |
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Thanks for the reply. The 3 in 1 is rated for 1/4hp to 1/3hp compressor, so I think I am ok with that. I'll have to check the current tomorrow and I'll get back to you.
Thanks!
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vendobaldtops
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« Reply #3 on: April 13, 2006, 09:15:22 am » |
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Not sure what machine you have, but I had a VMC 44 that would get really hot as well. Before I burned out the compressor motor, I realized that the thermostat that was in the machine was the type where the little coil thing needed to touch the metal (as opposed to other thermostats that adjust temp by air). I got a clip and connected the coil to the metal shroud. Started the machine the next day, ICE COLD...turned off in 10 minutes like the other machines....hope this helps although I apologize for the lack of technical refrigeration terms. 
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cvb141
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« Reply #4 on: April 15, 2006, 11:54:43 am » |
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Sounds as though you are still using the old overload with the new 3-n-1. Which is not necessary because the 3-n-1 has an overload of it's own.
Jerry
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Saguaro
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« Reply #5 on: April 15, 2006, 12:22:02 pm » |
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I put it the overload on because I get the impression that the over load in the 3-in-1 is a current overload and the one that came with the compressor is a temperature overload. When I realized that the compressor was getting really hot and not shutting off I got scared and put it back on.
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cvb141
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« Reply #6 on: April 15, 2006, 08:59:00 pm » |
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Can your refrigeration buddy come by and take a look at it for you, to make sure all is well? If everything is fine, then the compressor might have one foot in the grave. For your sake, I Hope not.
Jerry
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