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  1. #27
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    34,186
    You sure there's a coil in there? That's the box of an RCFA/RCFL N coil which is a "13 SEER" coil but I wonder if that's just an empty coil box! I don't see the stub for the copper tubing nor the drains sticking out.

  2. #28
    Join Date
    Oct 2010
    Location
    Anderson, South Carolina, United States
    Posts
    7,049
    You might be on to something there baldy

  3. #29
    Join Date
    Oct 2004
    Location
    So Cal
    Posts
    3,524
    It does look empty.
    If it is a 13 SEER case w/ no coil - you might have just lucked out big time!

    Give us width, depth & height of the case.

    We used to get empty cases & install in tract homes years ago when a/c was an option on new home. Maybe you can still get them for 13 SEER? Haven't used one in years.

  4. #30
    Join Date
    Sep 2012
    Posts
    15
    Is this what you are looking for? The tech that was there indicated that everything was in place but the condenser. Of course, i have no idea what I'm looking at.Name:  ACCoilDetail.jpg
Views: 144
Size:  117.6 KB

  5. #31
    Join Date
    Oct 2010
    Location
    Anderson, South Carolina, United States
    Posts
    7,049
    I see rubber caps but no copper stubs and the PVC drain is not visible. It could all just be covered though, tough to tell

  6. #32
    Join Date
    Sep 2012
    Posts
    15
    Oh, lordy. Well it just keeps getting deeper. Unfortunately, the property is 1500 miles from me right now, so I can't verify if the coil is present or not. I will be really unhappy if that was not mentioned by the tech, because he said it was good to go. I will try to verify with the city what we can and can't do. Sounds like getting a permit to drop in a condenser opens a real can of worms. Who knew an AC ready condo would be so complicated?

    I think our best-case would be if there is a coil in place that would be acceptable to charge with R410 and then drop in a new R410 condenser. Best-cases don't come along for me that often, though.

    I can't tell you guys how much I appreciate the help and guidance.

  7. #33
    Join Date
    Oct 2004
    Location
    So Cal
    Posts
    3,524
    No...
    Best case is that box is empty & you can slip a RCFL R410a coil in there, install 13 SEER R410a condenser & be compliant at minimal expense w/ no duct mods.

  8. #34
    Join Date
    Sep 2012
    Posts
    15
    Quote Originally Posted by BaldLoonie View Post
    3 ton Rheem is a 31x31 footprint. That sounds narrower than a 34" stairway. Won't be fun but a lot in HVAC isn't!

    If they require a matched system, virtually no dry unit would be legal in CA. In this case, the 13AJA36 would be rated at 12.70 SEER IF a Rheem TXV kit were added to the RCBA coil. If it is a different coil, tell me what the model # is.
    I was able to obtain a snapshot of the plate on the evaporator coil from the HVAC company that initially looked at it. Here is what it says:

    Model #RCBA-3765GH17BI; S/N T300403420; Mfd. 07/2004; Refrigerant 22; Design Pressure 300 PSI; “Piston size is indicated by the digits underscored in the Model Number” (65 is underscored); Rheem Manufacturing Co.; Air Conditioning Division, Fort Smith, AR; Made in USA.

    The people at the HVAC company that gave me the quote that was so high are really a good bunch, but we can't afford what they proposed (replace everything with a complete new 3-ton R410 13SEER system. I spoke with them today, and they now say the issue isn't that the coil is an R22. They said they could put a TXV valve on and fill it with R410 without a problem, but that the problem is it is a 10SEER coil, and they can only get 13SEER condensers. They said if they pair a 10SEER coil with a 13SEER condenser, because it is somewhat humid in the area we are located (close to the beach in San Diego), this mismatch will cause the unit to run all the time and not remove the heat and humidity. I was under the impression that a 10SEER coil with a 13SEER condenser might be just the ticket for a climate like the beach area of San Diego that averages 75 degrees, but has more than average humidity. BTW: The condominium is 1,406 sf on three floors (LR, Kitchen, DR on first floor; Guest BR on second floor; Master BR on third floor).

    Any thoughts on how we should proceed?

  9. #35
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    34,186
    Assuming that coil is really in there, tell them to put a RXCT-CHC R22 expansion valve kit on that coil. That makes it a MATCHED COIL for a 13AJA36 dry unit. That's the combo that gives you 12.70 SEER and a sensible heat ratio of .68 which leaves LOTS of latent capacity to control humidity. Now, Rheem did call for a physically larger coil so I wouldn't put a 410 TXV on it and go 410. Doing that required a RCBA48 and TXV to make a "3 ton" coil.

    Are they the ones who put the RCBA coil in a RCFA coil box? Whomever did that does NOT impress me

  10. #36
    Join Date
    Sep 2012
    Posts
    15
    BaldLoonie,

    Although I'm not sure I understand all of it, I really appreciate the information and will pass it along verbatim to make sure I get it right. It is unknown who put the coil in, but it is definitely there. Will it be a real disadvantage say in the next ten years to have an R-22 system? In your opinion, should we pay a little more now to get rid of all the R-22 and buy all new R-410 equipment or does this coil modification and purchase of a dry R-22 condenser make any sense at all or are we trying to be too tight with our dollars? Also, do you know how loud these condensers are? It needs to go on the second floor balcony just outside the guest bedroom doorway. Do you think the noise may be intolerable for those staying in the guest rooms?

    Thanks for all of the great information.

  11. #37
    Join Date
    Oct 2010
    Location
    Anderson, South Carolina, United States
    Posts
    7,049
    The only disadvantage will be if it develops a refrigerent leak and you have to add r22 because the price of it is climbing at a rapid pace and they will not be allowed to manufacture r22 after year 2020. I'm not to familiar with rheem units so I don't know about sound levels but I'm sure baldloonie will be able to enlighten you on that

  12. #38
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    34,186
    The Rheem cubes, either gas, aren't particularly quiet. You won't sit on the balcony with one running beside you. Probably won't be offensively noisy while you are inside.

  13. #39
    Join Date
    Sep 2012
    Posts
    15
    Quote Originally Posted by BaldLoonie View Post
    The Rheem cubes, either gas, aren't particularly quiet. You won't sit on the balcony with one running beside you. Probably won't be offensively noisy while you are inside.
    Okay, thanks for letting me know. I suppose no condenser will be pleasant to sit beside. My only concern would be if it is so loud that guest wouldn't be able to sleep, but in this climate, the A/C shouldn't need to be used a lot at night.

    Thanks for all of your help. I would never have been able to navigate this without it.

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