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)
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
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
Originally Posted by dlove
as u know split unit normal suction pressure is 60 psi.when temp reaches 60 c
pressure rise to 80 psi
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.
Opps, didn't see the thermal power plant part, hope it's not nuclear
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.
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.
Originally Posted by kefah
More information may allow some users here to give better advice.
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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
Originally Posted by coolinman
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.
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.
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