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05-30-2013, 09:29 PM | #16 | |
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the condensor you speak of changing is the outside unit, you don't convert a condensing unit from 22 to 410a. a/c or heat pump you change the unit, which also means you change the a-coil, which in this case prolly means the air handler. the line set can be left and flushed if its been brazed, if its been stay bright soldered best to change it too as 410 pressures are well higher than 22. on a hot day your liquid side could push toward 500psi; wouldn't trust stay bright. unfortunately you're prolly lookin at a sysyem change out.the only other option if you want a newer outside unit is to see about a dry 22 unit, then go a coil and ht pmp if it's available. that's my 2 cents worth anyways. |
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05-30-2013, 09:30 PM | #17 | |
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This is what you see in homes up here: |
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05-30-2013, 09:39 PM | #18 | |
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Yeah I knew you couldn't "convert" the outside condenser in the heat pump I was just thinking that since they have to replace the a-coil in the air handler (I'm assuming the a-coil and evap are same or am I way off here) that they could go with an a-coil that handles r410 (pretty sure the new Goodman's have same fittings) and go ahead and replace the heat pump's condenser as well. Or would you have to replace the entire heat pump? I have no clue on the soldering, which obviously could be an issue. Just so you know, the air handler is a Goodman A49-15, I think it may be from around 2000. Not sure on the make/model of heat pump but I know it was manufactured in July 2004. |
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05-30-2013, 09:43 PM | #19 |
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Yeah, this is Texas, that little thing couldn't handle a closet down here! Actually I think we are looking at same basic thing just bigger and on it's side and in the crawlspace above the laundry room. I really am boggled by the location of it. There is simply no way in hell the thing could have fit through the access panel... well, now that I think about it, I guess if you removed the entire door/stairs thingy maybe it could squeeze in. I'll have them get some measurements now that I have the model number and specs for the air handler.
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05-30-2013, 09:44 PM | #20 |
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Yes, the A-coil is your evaporator (but it acts as a condenser when the heat pump is in heating mode)
The heat pump IS the outside condensing unit. It's just like an standard AC condensing unit, but it has a reversing valve and some other extra bullshit on it. |
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05-30-2013, 09:49 PM | #21 | |
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the heat pump is the outside unit, so when you say the entire heat pump it would be the outside unit. not sure if a 410a coil would fit in that air handler as they are usually a little bigger than a 22 coil. taller usually, which can be a headache. if you were to upgrade to 410 it would prolly be wise to match system and change inside and out, just have line set checked close. it possibly could be left if it would be a total pain to change. Last edited by plbrdude; 05-30-2013 at 09:52 PM.. Reason: thinking |
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05-30-2013, 10:37 PM | #22 | ||
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Let me start over. I was thinking they could either A)replace a-coil as is and stay with R22 which is going to cost them a bunch to recharge. (something like $600 quoted to them just for recharge, I think) or B)replace a-coil with one for R410 and then of course they would have to replace the condenser in the heat pump outside to match. It sounds like you guys are saying that you don;t replace the condenser alone but the entire unit. Or of course C)replace the heat pump outside and the air handler inside which is going to be a massive job that I think will end up well over $6k or even $7k I want to recommend option B if it is at all feasible, since in my mind I was thinking they could get away with a job costing closer to $3k and have basically the same result as option C but without the brand new warranties. OK, let me know if my thinking is crazy talk. OH and I'm almost 100% certain Goodman makes an R410 a-coil that would fit this old air handler. |
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05-31-2013, 04:20 AM | #23 |
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i think the term you were looking for is compressor.
how do you know the leak is in the a-coil and not some other place? so you've got a 4ton unit with 3/8 & 7/8 lines. wholesale price from Johnstone Supply for an uncased coil for that is basically $415 and a new 410a copeland scroll compressor is $820. so much hassle to replace them though, then what if it doesn't work properly? better to have peace of mind for the next decade+ with a new system & warranty. |
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05-31-2013, 07:46 AM | #24 | |
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Yes they should upgrade because it will be cost prohibitive in the future if they do not. The drop in replacement for R-22 is more expensive than 410a. 410a refrigerant will only get cheaper. That replacement for the R-22 will continue to get more expensive because there is and will continue to be less and less in use.
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05-31-2013, 07:51 AM | #25 | |
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05-31-2013, 07:56 AM | #26 | |
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A gas furnace will have the evap coil on the supply side of the heat exchanger but prior to the plenum box.
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05-31-2013, 07:57 AM | #27 |
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exactly what I was talking about. coil right on top of the gas furnace.
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05-31-2013, 08:00 AM | #28 | |
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If it is a Goodman unit replace the whole thing. Goodman products are the absolute bottom of the barrel.
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05-31-2013, 08:19 AM | #29 | |
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05-31-2013, 08:22 AM | #30 |
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Welding is the same. And you don't have to replace the copper lines as long as they are proper sized. They make a flush to prepare the old existing copper lines for the new refrigerant. It is however highly recommended that you replace them to protect your investment.
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