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  1. #1
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    r410 low ref effect



    hi every one
    i work in thermal power plant
    since many years we used r22 ac unit in it
    they were sucssful
    before amonth
    we been supplied by ac unit but with r410
    problem is the cooling of these unit was too weak
    so we tried many mark of ac
    lg.samsung etc
    same result
    since the temp in iraq reaches 51 c in some days
    so where is the problem
    in ***** 410
    or in the unit or where
    can some one advice me



  2. #2
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    Re: r410 low ref effect

    r410a is twice the operating pressure of r22
    discharge pressure is typically 33 bar- at 20deg ambient so at 50 deg ambient, high head pressure and poor performance

  3. #3
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    Re: r410 low ref effect

    thank u for ur reply
    as u know the normal suction pressure is 60 psi
    but when temp exceed 50 c and reaches about 60 and 70c
    pressure is rise to 80 psi
    so what u advice me to do

  4. #4
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    Re: r410 low ref effect

    Quote Originally Posted by kefah View Post
    thank u for ur reply
    as u know the normal suction pressure is 60 psi
    but when temp exceed 50 c and reaches about 60 and 70c
    pressure is rise to 80 psi
    so what u advice me to do
    There must be something in the paperwork you received with a/c units to say what minimum and maximum ambients they cannot work at.
    I would say any ambient over 40 C is going to be putting a huge strain on a R410 systems.
    To the optimist, the glass is half full. To the pessimist, the glass is half empty.

  5. #5
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    Re: r410 low ref effect

    Quote Originally Posted by kefah View Post
    thank u for ur reply
    as u know the normal suction pressure is 60 psi
    but when temp exceed 50 c and reaches about 60 and 70c
    pressure is rise to 80 psi
    so what u advice me to do
    In the uk typically 10-12 bar standing pressure and a suction pressure of 10 bar at start up dropping to 8bar when the inverter is ramped up. Discharge pressures can go upto 38bar, this is based on a 20deg ambient ,my only recommendation is to go for 407c systems

  6. #6
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    Re: r410 low ref effect

    They are too weak for the present load. Check their specifications for the efficency at such ambient temperature. In all, if the choice of the units was based on a claimed efficiency ratio, then the mistake is now tangible.

  7. #7
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    Re: r410 low ref effect

    They are too weak for the present load. Check their specifications for the efficency at such ambient temperature.  In all, if the choice of the units was based on a claimed efficiency ratio, then the mistake is now tangible.
    So, at first check the "papers," as Mikeref said.

  8. #8
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    Re: r410 low ref effect

    thank u for help
    please close the thread

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