Page 1 of 4 1234 LastLast
Results 1 to 13 of 41
  1. #1
    Join Date
    Aug 2012
    Location
    Iraq
    Posts
    1,133

    freon 410 problem in iraq

    hi iam working in thermal power plant
    we have about 200 split r22 unit
    4 ton.2ton and other and working very good
    but some times remp rises to 60 or 70 c in some rooms
    as so these unit stop working
    because of high ambient temp ( i heard the r22 max range is 53 c)
    so
    before a month we recieved new ac unit work on r410 as i know max temp range is 68 c
    problem is their cool effect was too weak >(not very cool")
    we thought problem may be from bad ac manufacturer
    so we tried another ac unit with same prob
    so waht u advice me to
    max summer temp in iraq reached 51 c

  2. #2
    Join Date
    Jul 2011
    Location
    East coast USA
    Posts
    1,000
    is this like a nuclear power plant...hummmmm...did you reset the red button?

    Not enough info, you offer not temps, pressures, Model #s so no one can help you.

  3. #3
    Join Date
    Aug 2012
    Location
    Maine
    Posts
    180
    I know R410a loses capacity at very high ambients, most compressors for R410a internally bypass at 600-650psi. At the high ambients your in I would bet the 410a internal bypasses are opening up. R22 is a little better in high ambients but the compression ratio can really get up there and shut the comps off on thermal. I'd call the manufacturer to see what they suggest.

  4. #4
    Join Date
    Aug 2012
    Location
    Maine
    Posts
    180
    Opps, didn't see the thermal power plant part, hope it's not nuclear

  5. #5
    Join Date
    Aug 2012
    Location
    Iraq
    Posts
    1,133
    Quote Originally Posted by dlove View Post
    is this like a nuclear power plant...hummmmm...did you reset the red button?

    Not enough info, you offer not temps, pressures, Model #s so no one can help you.
    its steam power plant
    as u know split unit normal suction pressure is 60 psi.when temp reaches 60 c
    pressure rise to 80 psi

  6. #6
    Join Date
    Feb 2009
    Location
    Tallahassee, FL
    Posts
    6,051
    Use the highest seer single stage heat pump unit you can.

    Why heat pump? They have much larger outdoor coil.

    But then again nothing is designed for what you describe.


  7. #7
    Join Date
    Aug 2012
    Location
    Iraq
    Posts
    1,133
    u mean its better
    if i use ac unit with cooling only
    no heat pump

  8. #8
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    19,554
    Quote Originally Posted by kefah View Post
    u mean its better
    if i use ac unit with cooling only
    no heat pump
    No, he means use a heat pump because the outdoor coil is larger.

    More information may allow some users here to give better advice.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

    AOP Forum Rules:







  9. #9
    Join Date
    Aug 2012
    Location
    Iraq
    Posts
    1,133
    thank u every one

  10. #10
    Join Date
    Jan 2005
    Location
    southeast
    Posts
    83
    Are you trying to say you are cooling some inside rooms at the plant that reach 60-70C when It's 51C outdoor. Or your trying to cool inside when it reaches 60-70C outside.

  11. #11
    Join Date
    Jan 2004
    Location
    PA
    Posts
    68,785
    Your R22 units are probably already under sized a bit for your outdoor temps. At your outdoor ambient temps, you should probably increase size by 1/2 to 1 ton when switching to R410A.
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  12. #12
    Join Date
    Jul 2004
    Location
    Massachusetts
    Posts
    6,841
    You're given some very high numbers with limited information. For example, saying 60°C to 70°C is meaningless until you define the location of those temps. Normally for such a discussion, we'd need to have some idea of the indoor dry and wet bulb temps as well as the OAT. For example, if the indoor dry bulb is 60°C and the OAT is 50°C, then I'd first recommend a large dose outdoor air be circulated to reduce the indoor temps. Other questions I'd have would be about line length. Are you doing long lines applications? Capacity can be lost when using long lines. Standard conditions are not with what you're dealing here so I'd suspect you may need to have an engineered system, rather than off the line residential of light commercial units.
    If YOU want change, YOU have to first change.

    If you are waiting for the 'other guy' to change first, just remember, you're the 'other guy's' other guy. To continue to expect real change when you keep acting the same way as always, is folly. Won't happen. Real change will only happen when a majority of the people change the way they vote!

  13. #13
    Join Date
    Aug 2012
    Location
    Iraq
    Posts
    1,133
    Quote Originally Posted by coolinman View Post
    Are you trying to say you are cooling some inside rooms at the plant that reach 60-70C when It's 51C outdoor. Or your trying to cool inside when it reaches 60-70C outside.
    trying to cool inside when it reaches 60-70C outside

Page 1 of 4 1234 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