I don't know what is different but I have been faced with the same thing.
It seemed to me that it had something to do with the compressor starting
when super cold.
Perhaps different oil in it or something.
-----Original Message-----
From: Nate Burke
Sent: Wednesday, August 15, 2018 8:56 AM
To: Animal Farm
Subject: [AFMUG] Low Temperature AC
I'm looking to get a Mini Ductless Split system to put in a small server
closet. Over the winter our outdoor temps get down to the -10 to -20F
range but heat is still generated in the middle of the building.
Looking at the Mitsubishi 'P' Series "Mr Slim" Lots of data sheets talk
about the 'Ultra low ambient cooling option' Where the outdoor unit
will work down to -40F. But I have not been able to find a single thing
that says what the 'Ultra Low ambient cooling option' actually is, or
any part numbers for it.
The product catalog has a page dedicated to 'Low Ambient Cooling System'
that operate to 0F and 'Ultra Low Ambient Cooling Systems' that operate
down to -40F. But again, no part numbers are listed.
http://www.mitsubishieng.ca/en/hvac/p-series/operation.html Lists a -40f
Option.
https://www.mitsubishipro.com/products/p-series/outdoor/single-zone-cooling-only
Lists a -20F option.
Has anyone had experience with these? It seems like it's more than just
a wind baffle on the compressor, there are extra line heaters and
filters that are needed? My Normal HVAC Guys are used to working
residential/small business, so the need for cooling over the winter is
hard for them to understand. Other HVAC guys that I've found that know
about the P-Series only know that the spec sheet says cold weather
operation, but nothing beyond that.
Any Tips or different systems to look at?
Nate
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