View Full Version : high ambients condensers
02-23-2009, 01:37 PM
we have been asked to quote on some installs for the middle east. They have specified condensers rated at 50 deg'c However I can only find stuff here rated at 43 deg c. What do you guy's work on in places like Phoenix and death valley where temps can hit 50 deg's?
Thanks for any help
02-23-2009, 03:18 PM
For metrically challenged Yanks (like me), 50ºC = 122ºF and 43 C = 109.4ºF :rolleyes:
I'm sure manufacturer's standard designs aren't rated for that high an ambient, but if you should be able to get a quote for a custom build with oversized condenser coils which would keep condensing temps within the compressor limits.
I believe Copeland refrigeration duty scrolls are rated up to 140ºF (60ºC), so if the condenser were sized for a TD to stay under that, you'd be good to go.
Heatcraft should be able to quote you on those.
02-23-2009, 03:30 PM
Many thanks for that.
Ironically we have spec'ed those very compressors so hopefully it's going to be ok -warranty calls could be a real pain :eek:
02-23-2009, 05:20 PM
I suggest you contact a Heatcraft rep in the UK and give him (her) the requirements. I'm fairy certain they'll build whatever you need.
Also, if these units are destined for a dusty sandstorm-prone area, Heatcraft's new Hypercore Microchannel condenser coil should work very well as it's only about 1" deep and has lots of free area between the corrugated finning.
I recently installed my first one with this coil and was quite impressed. If you look into the condenser you can clearly see the fan on the other side....that's how open it is. It would be difficult indeed to plug up one of these with dust.
Be sure the scroll compressors are the refrigeration duty models with liquid injection cooling. That should help get through the high ambients with little if any trouble.
The only true problem I see by sizing to such an extremely high ambient temperature, you'll likely be considerably oversized for cooler weather operation. It may be something to consider in the overall equipment selction and matching of components.
Best of luck with your quote, Cousin. ;)
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