Ductwork with R8 insulation better for attic? - Page 3
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  1. #27
    Join Date
    Sep 2012
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    373
    We had a tech come out the other day and he lowered the blower speed for the system. It now runs around 675 cfm for the first 7 minutes then ramps up to 824 cfm after that. Is this proper?

  2. #28
    Join Date
    Dec 2002
    Location
    Arizona
    Posts
    4,306
    Yup. That will work
    Make your expertise uniquely valuable.

    Make your influence uniquely far-reaching.

  3. #29
    Join Date
    Jan 2009
    Location
    Keokuk, IA
    Posts
    5,520
    Quote Originally Posted by 545GAlady View Post
    We had a tech come out the other day and he lowered the blower speed for the system. It now runs around 675 cfm for the first 7 minutes then ramps up to 824 cfm after that. Is this proper?

    That will help. Even better is a thermostat that measures humidity and tells the unit to slow the blower in demand. IMO, this should be standard on ALL installation in all but hot dry climates.

  4. #30
    Join Date
    Sep 2012
    Posts
    373
    Thanks for the info guys. I just felt the air temperature and it's still not very cold. I went outside to look at the A/C and I find several holes in the condenser coil. There's also a very high pitched noise coming from the A/C as well. What could be wrong? Should I start another thread for this next issue? I'll have to call a service tech back out.

  5. #31
    Join Date
    May 2004
    Location
    south louisiana
    Posts
    3,136
    keep it all in one thread makes it easier to see where we
    have been rather than searching out different threads.


    best of luck.
    The cure of the part should not be attempted without the cure of the whole. ~Plato

  6. #32
    Join Date
    Sep 2012
    Posts
    373
    Ok thanks! We believe it was vandalism that caused the holes. All of the refrigerant leaked out and now the unit won't turn on (except the blower). Our HVAC company is coming out on Tuesday next week to look at the system and might quote us on a condenser coil replacement or a whole new A/C unit. It's a shame to have this happen on a 1 year old unit.

  7. #33
    Join Date
    Sep 2012
    Posts
    373
    Since the unit won't turn on at all now, do you think the compressor burned out because of running when there's no refrigerant or is there a low pressure cut off switch that's preventing the unit to run? A tech is coming out in a few days and I have the system completely off now.
    Last edited by 545GAlady; 04-27-2013 at 10:01 AM. Reason: more info

  8. #34
    Join Date
    Oct 2010
    Location
    Anderson, South Carolina, United States
    Posts
    6,336
    Quote Originally Posted by 545GAlady View Post
    Since the unit won't turn on at all now, do you think the compressor burned out because of running when there's no refrigerant or is there a low pressure cut off switch that's preventing the unit to run? A tech is coming out in a few days and I have the system completely off now.
    Hopefully it has a low pressure switch that shuts down the unit in a lp situation. Is it bullet holes? I'd like to see a pic.

  9. #35
    Join Date
    Sep 2012
    Posts
    373
    Quote Originally Posted by jtrammel View Post
    Hopefully it has a low pressure switch that shuts down the unit in a lp situation. Is it bullet holes? I'd like to see a pic.
    I'm hoping it does too. The whole outdoor unit isn't turning on at all. Only the blower in the furnace turns on. There is 0 refrigerant in the whole system. It looks more like someone stuck a screw driver in several locations on the coil. I'll upload a picture when I get a chance.

  10. #36
    Join Date
    May 2007
    Location
    DC Metro Area (MD)
    Posts
    3,368
    Can you post the model number of the condenser as well? I think you mentioned once it was a Goodman/Amana SSX14, and if so then it has high and low pressure switches. Bigger concern is that system has been opened up to the atmosphere (moisture) for a prolonged period. Proper repair procedure is critical as far as evacuation and replacing the filter drier.

  11. #37
    Join Date
    Sep 2012
    Posts
    373
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    The hole in the second picture is where we think the refrigerant leaked out. When I went outside yesterday I heard a loud hissing noise coming from the unit.
    Last edited by 545GAlady; 04-27-2013 at 01:08 PM. Reason: additional info

  12. #38
    Join Date
    May 2004
    Location
    south louisiana
    Posts
    3,136
    are you sure it wasn't shot up with a gun?

    sorry to see this has happened, hopefully it
    can be repaired/replaced at little cost to you..

    best of luck.
    The cure of the part should not be attempted without the cure of the whole. ~Plato

  13. #39
    Join Date
    Sep 2012
    Posts
    373
    Quote Originally Posted by energy_rater_La View Post
    are you sure it wasn't shot up with a gun?

    sorry to see this has happened, hopefully it
    can be repaired/replaced at little cost to you..

    best of luck.
    Well I'm not completely sure. Not all the holes are big. Some are extremely tiny. Our area of town see very little crimes.

    It's alright I guess. Our other two units weren't touched at all. My husband will file a police report. Hopefully insurance can do something about it. Doesn't a low pressure switch shut the unit off when its on or can it not start the unit up if there's very little or no refrigerant?
    Last edited by 545GAlady; 04-27-2013 at 01:52 PM. Reason: spelling corrections

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