Ah, yes, that’s it, crankcase heater. I was close. From: Aeron Wireless Sent: Wednesday, August 15, 2018 9:10 AM To: af@af.afmug.com Subject: Re: [AFMUG] Low Temperature AC
I've seen two different kits. One, more common in refrigeration, is a crank case heater to keep the oil fluid. The other (more common in HVAC) controls (reduces) the condenser's fan speed to prevent it from (literally) freezing up. On Wed, Aug 15, 2018 at 11:07 AM <ch...@wbmfg.com> wrote: 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 -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com -------------------------------------------------------------------------------- -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com
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