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Type: Posts; User: alex1960

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  1. Replies
    15
    Views
    3,615

    It apears that I did not explain my question...

    It apears that I did not explain my question properly. Let me clear it up.
    With manual dampers, you can adjust the percentage of fresh air (outdoor Air) from zero and up., normaly 15% ( code...
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    15
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    3,615

    My question is about fresh air not economizer.

    My question is about fresh air not economizer.
  3. Mixed air setting could be the problem. Check and...

    Mixed air setting could be the problem. Check and reset above 500F
  4. Replies
    15
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    3,615

    motorized fresh air damper

    Hello all,
    any one can explaine the porpuse of motorized fresh air damper on roof tops since it is a code's requirement instead of manual fresh air damper.


    Thanks
  5. Replies
    3
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    6,852

    R410a TXV vs R22 TXV

    Recently I replaced many indoor coil which came with R410a TXV manf. installed. Keeping the condensing R22 unit, we must change the TXV compatible with R22.
    My question is what happens to the...
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    8
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    1,258

    I need some advise on how to hookup a UV light to...

    I need some advise on how to hookup a UV light to a furnace/air-handler in a way on which when the unit is not running deenrgize the light (summer or winter).
    Please be specific and with no or...
  7. Thread: Feels like...

    by alex1960
    Replies
    6
    Views
    1,033

    Does anyone know how they measure the tempreture...

    Does anyone know how they measure the tempreture when dry-bulb is 93F but feels like 105F. How we can measure our feeling? I undestand the windshield Temp, but does it apply to summer too? How?
  8. Thread: Leak Search

    by alex1960
    Replies
    15
    Views
    1,658

    "minusdegrees NO Drop in pressure...vacuumed...

    "minusdegrees
    NO Drop in pressure...vacuumed ..wieghed in charge..... suction pressure 55.... head 290 psi......added refrigerant to try and get suction pressure to rise ....no good ... head raised...
  9. Replies
    15
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    1,416

    You should consulte with Carrier about your...

    You should consulte with Carrier about your application before installing these units. Now, you can control latent heat by making a bypass duct from supply air to return air (recirculating air and...
  10. Replies
    8
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    1,379

    Compare your readings with performance data. It...

    Compare your readings with performance data. It should be in a plastic envelope attached to the unit.
    Just as a reminder, performance data sheet is not a charging guide, you can only compare your...
  11. Thread: Frosting

    by alex1960
    Replies
    17
    Views
    1,800

    It SEEMS to me the changeover valve is leaking.

    It SEEMS to me the changeover valve is leaking.
  12. Replies
    6
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    1,126

    Thanks Chris, I orded two books on that site.

    Thanks Chris,
    I orded two books on that site.
  13. Replies
    15
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    1,416

    Low highside presure is due to very low...

    Low highside presure is due to very low evaporator temperature. I Agree that there is an air flow problem. Check the blower fan rotation. I had a not very similar case which was fixed by switching L1...
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    1,126

    ?

    ?
  15. Replies
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    1,126

    I need a book on erection of metal ducts. Any...

    I need a book on erection of metal ducts. Any recomendation is appreciated.
  16. Thread: New Condenser

    by alex1960
    Replies
    11
    Views
    1,195

    Dryer is restrcted. They should change it at...

    Dryer is restrcted. They should change it at first place. Before installing new dryer remove old one, purge evaporator coil with high presure nitrogen <200psig from suction side out through liquid...
  17. Thread: new mechanic

    by alex1960
    Replies
    33
    Views
    2,563

    Another simple life. Be aware of electricity and...

    Another simple life.
    Be aware of electricity and fan blades.
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