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  1. #1
    Join Date
    Jan 2011
    Posts
    594

    Mini split and a heat pump.

    Just a 26 seer Mr Slim unit we put in a garage. The infinity had to be setup on blocks. Supposed to bring grade up to the bottom of the concrete pad. Frozen ground, always fun to work with.
    No pics of the indoor units, forgot... Oops








  2. #2
    Join Date
    Aug 2001
    Location
    Pavilion, NY
    Posts
    2,123
    Looks nice.. What did you use for wire in your whip? I have gone to using 14-3 sjo cable on the mitsubishis. It is outdoor rated, stranded, and black. Saves time having to deal with the whips, looks a tad fancier and works excellent on the multi head units so you don't have to run 5 whips which are a pain to get into the knockouts..
    ...

  3. #3
    Join Date
    Jan 2011
    Posts
    594
    I just use 14 gauge stranded wire. Bought some spools of it. I like the idea of the sjo, I used that stuff to make my extension cords. I would still put it in a whip. Im not really worried about saving that much time, more about doing quality work.

  4. #4
    Join Date
    Dec 2005
    Location
    Cincinnati, Oh
    Posts
    4,979
    Look beautiful.

    We have had problems with pump ups on those units though. The top of the pump up breaks because the legs don't equally distribute pressure.
    "Better tell the sandman to stay away, because we're gonna be workin on this one all night."

    "Dude, you need more than 2 wires to a condenser to run a 2 stage heatpump."

    "Just get it done son."

    Dad adjusted

  5. #5
    Join Date
    May 2009
    Location
    Savannah, Ga/H.H. Island, S.C.
    Posts
    1,455
    Man....Carrier is still using a piston as the OD metering device, even on the Greenspeed?

    Nice work BTW.

  6. #6
    Join Date
    Jan 2011
    Posts
    594
    That's not a greenspeed, just a 2 stage heat pump. Personally I am a fan of pistons. They don't go bad is one reason!!!!! Greenspeed has an electronic expansion valve.

    From what I have heard it is kind a flop. Know several companies that have put them in and are having issues with them..

  7. #7
    Join Date
    May 2009
    Location
    Savannah, Ga/H.H. Island, S.C.
    Posts
    1,455
    Ok. Thanks for the clarification.

    I saw the green on the label and you know...

    O well.

  8. #8
    Join Date
    Jan 2011
    Posts
    594
    Pretty sure all the Infinity's have that label now.

  9. #9
    Join Date
    Jan 2009
    Location
    Salisbury, Maryland
    Posts
    140
    Quote Originally Posted by Brent Ridley View Post
    Man....Carrier is still using a piston as the OD metering device, even on the Greenspeed?

    Nice work BTW.
    X2, Im not fond of the location either. I've never regularly installed Carrier but if I did, I would carry a bunch of tee's to pipe in before the piston or something so I could check subcooling.

  10. #10
    Join Date
    Jan 2011
    Posts
    594
    Quote Originally Posted by ClimateCntlJohn View Post
    X2, Im not fond of the location either. I've never regularly installed Carrier but if I did, I would carry a bunch of tee's to pipe in before the piston or something so I could check subcooling.
    You have lost me? You can check subcooling on these units. I wish they would go back to pistons on the indoor coils. A lot less issues...

  11. #11
    Join Date
    Jan 2009
    Location
    Salisbury, Maryland
    Posts
    140
    Quote Originally Posted by jimmyed View Post
    You have lost me? You can check subcooling on these units. I wish they would go back to pistons on the indoor coils. A lot less issues...
    Sorry...let me clarify. I was X2'ing Brents comment about pistons on the outside, I do agree they have less problems than a TXV but I figured a 2 stage HP would utilize a TXV outside. And about the subcooling in HEAT MODE, because the gauge port on the LL is after the piston (low side), I was saying I'd personally add a port before the piston to get a true liquid pressure measurement right before the piston. Good lookin' installs in my book, I might add a sleeve through the wall for the line set though.

  12. #12
    Join Date
    Sep 2005
    Location
    Atlanta GA area
    Posts
    21,057
    Not sure why folks do not like TXV's... if it is because there were some bad ones.... well there were some bad blower wheels a few years ago also... should we go to using fans in furnaces?

    TXV's work as well as they are installed... maybe that is the issue???

    BTW: Ever see a piston on a refrigeration unit?
    GA-HVAC-Tech

    Quality work at a fair price with excellent customer service!

    Romans Ch's 5-6-7-8

    2 Chronicles 7:14

  13. #13
    Join Date
    Jan 2009
    Location
    Salisbury, Maryland
    Posts
    140
    True dat man. I say we start using hampster wheels, authentically spun by a hampster haha. A piston on a reefer unit is interesting, dont believe Ive seen that...pics?

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