Page 1 of 3 123 LastLast
Results 1 to 13 of 28
  1. #1
    Join Date
    Mar 2007
    Location
    southeast u.s.
    Posts
    71

    P66 Variable Speed Controller..

    ... for a Data Aire condenser fan. Will it go bad if the motor and 24v supply for the controller are on different phases?

  2. #2
    Join Date
    Mar 2007
    Location
    southeast u.s.
    Posts
    71
    Does nobody know or is this question being avoided? I'm kinda new to the forum so I'm not sure how folks operate here.

    FYI, I'm a newbie here, not to the field

  3. #3
    Join Date
    Jun 2006
    Location
    New Jersey
    Posts
    4,337
    Quote Originally Posted by mortatort View Post
    ... for a Data Aire condenser fan. Will it go bad if the motor and 24v supply for the controller are on different phases?
    They are very specific in their instructions that they have to be in phase. Why I don't know? I just do it.

  4. #4
    Join Date
    Apr 2007
    Location
    Ontario Canada
    Posts
    171

    P66 wiring...

    Quote Originally Posted by mortatort View Post
    ... for a Data Aire condenser fan. Will it go bad if the motor and 24v supply for the controller are on different phases?
    I think it's page six in the instructions that says the 24 volt supply to the P66 must be on the same 2 legs as the motor itself. Otherwise, it works poorly or not at all. Easy fix. Usually it doesn't kill the P66, just prevents correct operation.

    D.

  5. #5
    Join Date
    Jan 2007
    Location
    Charm City--the city that bleeds
    Posts
    2,790
    Patience, Grasshopper. I third the motion forwarded by the previous two associates.
    Nike... just do it.
    It's great to be alive and pumping oxygen!

  6. #6
    Join Date
    Feb 2006
    Location
    SouthEastern Virginia
    Posts
    1,075
    I've never seen one wired up wrong to be able to tell you either way. Did the P-66 fail or the motor?
    It might get loud!

  7. #7
    Join Date
    Nov 2002
    Location
    NJ - WORK IN NYC AREA
    Posts
    1,458

    Cool

    No, the 24 volts doesn't have to bee on the same phase. The reason this is done is to prolong the low voltage circuitry in the control. If the trans is on the same phase, the dc circuits will only be powered when the condensor fan calls.

    If its on another and that phase is live when the power is on to the unit, the dc circuit will always have power.

    The factory also recommends a seperate trans. Some units that come with a P66 already installed, usually don't put in the second trans. to save money. Thus keeping the circuity live. They will use the same trans that powers the stat and other contactors.
    "My hands are for sale"

  8. #8
    Join Date
    Sep 2004
    Posts
    522
    Mr. HVAC I think you may be wrong. I have seen them wired to different phases and it will cause the fan to stop when it gets to the high end of the P66 controller range. Not sure why it does it but I have seen it with my own eyes. it needs to be wired exactly as the diagram shows using the same phase of power.

  9. #9
    Join Date
    Mar 2007
    Location
    southeast u.s.
    Posts
    71
    Quote Originally Posted by duke of earl View Post
    Did the P-66 fail or the motor?
    The P66 failed. Actually a couple of them have. I can't find any other reason other than the phasing. I think what happen was someone changed out the var. motor at some point and just wired it back up on a different leg.

  10. #10
    Join Date
    Nov 2002
    Location
    NJ - WORK IN NYC AREA
    Posts
    1,458

    Hmm

    FIX,

    I don't doubt what you said about high end failure, but I have never come accross this problem yet? Have used many of them over the years.
    Only had a problem if motor amp exceeded controller.
    "My hands are for sale"

  11. #11
    Join Date
    Apr 2007
    Location
    Ontario Canada
    Posts
    171

    P66 failures from heat...

    Quote Originally Posted by mortatort View Post
    The P66 failed. Actually a couple of them have. I can't find any other reason other than the phasing. I think what happen was someone changed out the var. motor at some point and just wired it back up on a different leg.
    I've had some Carrier MotoMasters ( a related product) fail from heat and low voltage. The aluminum slab on the back has to be ventilated. I'll sometimes drill a hole in the condenser box to allow air to be sucked over the cooling fins, it doesn't take much to keep them happy.

    D.

  12. #12
    Join Date
    May 2004
    Location
    Rapid City, SD
    Posts
    7,415
    I've had 3 of those fail. All 3 started leaking freezone out of the control box and made a nice oily mess.

    Maybe I didn't have the refrigerant on the same phase? lol
    "If you call that hard work, a koala’s life would look heroic."

  13. #13
    Join Date
    Jan 2011
    Location
    We'll take your money Ct.
    Posts
    5
    Is a P-66 controller adjustable?

Page 1 of 3 123 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event