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Thread: THPRE

  1. #27
    Join Date
    Jan 2013
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    TRAIL,OREGON
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    68
    I posted the numbers. You got me - I do not know what you are refering to with the return side unless it is the return air to the blower? In which case it is simple. The air handler is in an enclosed closet from floor to ceiling - approx. 10 feet. there is one louvered opening to this closet approx. 3 feet square. Also a motorized vent to the out side through the roof - this because the house is too tight for health full air exchange , so it opens every time the blower comes on and closes when it is off. All of this is in a utility room eight feet wide and fourteen feet long - one door to outside and one door to the interior of the house. The inside door is normally open and air flow will force it open even though it has a sizable louvered opening in it. The blower does change speeds. the unit has a logic board with dip switches - these were reset the first time I had to call for repairs. This was done with phone consultation to the supplier. Thanks, THPRE

  2. #28
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    Jan 2013
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    TRAIL,OREGON
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    68
    The govt is giving me all sorts of tax credits for installing such an energy efficient unit and for having all the duct repairs done and checked --- what a joke - my electric bills are obscene!! 250 without the heat pump working and 600 to 800 when I try to use it!! I guess the Govt. is giving me your tax money - Thanks!

  3. #29
    Join Date
    Jan 2013
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    TRAIL,OREGON
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    68
    Static Regain Collar croped up on the internet in response to my various inquirys. It apparently has something to do with air flow and is downstream of the blower. I really think my air flow troubles are behind me now after numerous remodels and repairs. I'm not saying the air flow is great - it is much better in my house at the coast. The coast house is the same size - 2500 sq.ft. but it has a great heater with fantastic air flow - the curtins wave like a flag in the wind! The house in question is not like that but at least you can feel the air if you stand over the louver.

  4. #30
    Join Date
    Feb 2009
    Location
    Tallahassee, FL
    Posts
    6,040
    You say 3ft square? What are the actual dimensions? What about filter there is no factory goodman provision on that setup.

    I would want to verify the board is setup properly to move the appropriate cfm. Would you say indoor blower is very silent or is it "ramped " up pretty good during heat. It should be full tilt boogie.

  5. #31
    Join Date
    Jan 2013
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    TRAIL,OREGON
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    68
    Actual dimensions - will have to measure when I'm home again. It is large enough to make air flow that will open the outside or inside door rapidly. Blower is what I would call "full tilt". Just a standard cheap air filter behind a hinged ,louvered opening. Not even an anti allergen one.

  6. #32
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,929
    Static regain collar was needed on Rheem/Ruud air handlers some years ago.

    Your air flow problems are not behind you, and they are still biting you. Sealing the return duct often lowers air flow, cause now the blower isn't able to use that air. A simple static pressure check would tell how your air flow really is.
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  7. #33
    Join Date
    Jan 2013
    Location
    TRAIL,OREGON
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    68
    I'm confused. I had a third party do the "check me " test and it passed this summer. I have a certificate from Proctor Engineering saying that the charge and performance of the air conditioner passed the test. Also they state that the air flow passed the test. They did a static pressure test along with other tests. This certificate entitles me to a tax rebate from the state of Oregon and I have the reply from the state giving me the papers for my tax rebate. I also wonder how restricted air flow would cause 600psi head pressure in heat mode but not in cool mode.

  8. #34
    Join Date
    May 2006
    Location
    Philadelphia, PA
    Posts
    1,384
    The Check-Me test can be fooled.

    The indoor coil is the condenser in the heat mode. Low airflow across the condenser causes high head pressure.
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  9. #35
    Join Date
    Jan 2013
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    TRAIL,OREGON
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    68
    OK I go for that. But the air flow in the house seems suficient. Warms the house quickly enough. It is moving enough air to cause the inner door to be forced open. It is always left open anyway. I don't have the numbers from the tests here so will look at home again. Thanks , THPRE

  10. #36
    Join Date
    Jan 2004
    Location
    Lancaster PA
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    Yep, post the numbers from the test. CFM, total static, return and supply static. Just because it warms the house quickly, doesn't mean its moving enough air. It could be over sized for the house.
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  11. #37
    Join Date
    Jan 2013
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    TRAIL,OREGON
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    68
    Well I looked at all my paperwork and I have statements that I passed all the tests and I have tax credits but no numbers. I know they had numbers and went over them but I have no record of them. I also know that they did a survey of the house's heat load taking into consideration the extra insulation and all the extra windows as well as the three glass doors and they said the unit was properly sized. There again I have no numbers or formulas . I did check the size of the return air filter opening - it is 36 in tall and 28 in. wide. I guess I will see what the Goodman expert has to say on the phone tomorrow. Thanks for all the helpfull answers. I will post the results of the conference . THPRE

  12. #38
    Join Date
    Aug 2012
    Posts
    2,650
    600 psi is an indication of improper air flow, a restriction or non condesables in the freon. i suspect ductwork too small for air handler.
    My name is TooCoolforschool and I am a chronic over charger.

  13. #39
    Join Date
    Jan 2004
    Location
    Lancaster PA
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    67,929
    Quote Originally Posted by THPRE View Post
    I also wonder how restricted air flow would cause 600psi head pressure in heat mode but not in cool mode.
    Cause in heat mode the indoor coil is the condenser(low air flow high head pressure), and in cool mode the indoor coil is the evap coil(low air flow low suction pressure, and low head pressure).
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