Have a call on a split system - has a 15 ton new american standard condenser duel compressor. is piped to a rheem 12.5 ton slab coil with duel expansion valves. valves are 8 ton each on a 12.5 ton coil. the weird part is the sight glass will not clear up no matter how much refrigerant is added. right now the there id 70# suction and 300# head while only running on 1st stage compressor if i energise the 2nd compressor site glass is still foaming anf head goes to 365#. I would think the coil would be flooded and not starved.
15 ton split system r-22
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douknowq
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Have a call on a split system - has a 15 ton new american standard condenser duel compressor. is piped to a rheem 12.5 ton slab coil with duel expansion valves. valves are 8 ton each on a 12.5 ton coil. the weird part is the sight glass will not clear up no matter how much refrigerant is added. right now the there id 70# suction and 300# head while only running on 1st stage compressor if i energise the 2nd compressor site glass is still foaming anf head goes to 365#. I would think the coil would be flooded and not starved.
What if there is a restriction? What is your SC and SH at?
You should post more info. What are the entering and leaving air temps? what are the SH and SC readings? How much piping is there? Is the new condenser a single circuit dual compressor and the air handler set up the same. How much gas is no matter how much? Don't know what valves you have but they should be able to back off OK. Are you sure the valves are OK?
How much gas did you recover from the old system? I have more but that's enough for now ...
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How much gas did you recover from the old system? I have more but that's enough for now ...
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A restriction was my first thought. I only had a couple of min. there before they closed. only had time to get a supply temp of 67 and return of 71. short duct system only a few feet one return one supply into a very large room like a gym. line set is also short only about 12 feet. has a sight glass and liquid line drier. very green on the glass and no temp diff. after drier.
He may be very low on charge and have a real hot return air temperature and ambient temperature. He should attempt to figure out what his approximate charge should be. If he can add, then he needs to know condenser charge, line(s) charge, and coil charge add them up and that gives him an approximate idea of where he is headed for charge. He may have to cool down the condenser to keep the thing running until he gets the charge close. In my humble opinion …
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I agree, thats why temperatures need to be taken. I was given a example why a sight glass won't show proper charge.He may be very low on charge and have a real hot return air temperature and ambient temperature. He should attempt to figure out what his approximate charge should be. If he can add, then he needs to know condenser charge, line(s) charge, and coil charge add them up and that gives him an approximate idea of where he is headed for charge. He may have to cool down the condenser to keep the thing running until he gets the charge close. In my humble opinion …
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Not hot indoor 72 degrees ouside temp 82 degrees both cond fans running only one of the 2 compressers running high head good suction and sight glass is foaming then flashes clear and u can see only a little refrigerant running through
Hmmm ... seems like it still needs freezone to me ... do tell ... how much did you recover? How much has been put in? Make sure when you look into the sight glass that the refrigerant flow is left to right.
Let us know ...
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Try pretending the sight glass wasn't there.......what would you do?
Some how I got into my mind that the condenser was new ...
Did your company install the condenser?
Where did the original refrigerant go?
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Some how I got into my mind that the condenser was new ...
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Have a call on a split system - has a 15 ton new american standard condenser duel compressor.
Maybe that's why. First sentence of thread.
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Not one smart ass remark yet. Chill out.
No one is being a smart ass, when you say "new" a lot of us thought it was new now, not last year. It makes a difference in the way the system is approached. You know as ... it worked perfectly for a year and then ... this.
Who charged it the first time?
Did it replace a 15-ton or 12.5?
There are many Q's and a need for many A's to help you out ... and we do ever so much want to help ...
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And my comment about, "pretend the sight in not there", is intended to point you away from trying to clear the sight glass. And move you towards a possible different direction.
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Her ya go, just fill this out, and one of the moderators will do the rest.
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