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Perhaps check out the Carrier 50XCA... the 10 Ton version is available with a Horizontal S/A Plenum. Perhaps not the same configuration to the comparable Bard unit, but worth a look. I believe Trane has a comparable model as well, that should be in the same price range.

The lowest a typical packaged Air-Cooled Chiller can supply is about 10 F (Trane CGAM) to 15 F (Carrier 30RB), with the typical 'low temp' options. I'm not sure how you're going to achieve a LChWT of -20 F @ 110 F Ambient. The lowest I've had to supply before is 15-17F, and that is for Ice Rink...

^ Agreed. Ask your local sales rep. for a Long Line Design Guideline. Also, be concerned with proper oil return to your compressor(s).

For a 60-Ton ACC, I would either go with a York, or Carrier. The reason being: Shell & Tube Evaporator. I try to avoid Plate & Frame at all costs.

^^^ Capacity issues, or longevity?

As AbbyNormal mentioned, it will be very easy to notice. It's quite black, and stands out from most other Al/Cu or Al/Al coils. Just ensure they aren't supplying you with the 'Pre-Coat' option. If you don't mind the extra $, splurge for the E-Coated Cu/Cu Coils instead of the standard Al/Cu. BTW...

Comfort, or Process? What type of building? Are you limited by space? Water-Cooled, or Air-Cooled?

tys90 -- FYI, we can still utilize new equipment designed for R-22, you can just no longer manufacture such units... kind of a grey area. mahaff -- Does your mini-split utilize a TXV, or piston?

How much $ are you willing to spend? For a typical, inexpensive, catalog unit: Carrier 38AUD016: See the attached, as it's not yet on their website. http://files.engineering.com/getfile.aspx?folder=0a1f22f7-4d14-45d6-a953-f7a2c9c3574e&file=38AUD_Product_Data.pdf York Y-Series...

1) Typically: Higher efficiency = larger condenser coils = additional material (namely, copper) = higher cost. The commercial industry is, for the most part, cost-driven. You will notice that on most commercial jobs, 'minimum' efficiency equipment (as per ASHRAE 90.1) is specified/supplied...

They typically utilize much less refrigerant, and are quite strong (I have one in my office, and can punch it with my fist without making a mark in the fins).

Is this being used in a commercial application? If so, did they advise you to choose this unit, or was the selection your own? What is unfortunate about these direct-driven units (unlike any of the belt-driven RTU offerings), is that there is no fan-curve available for reference.

They are very similar in construction to automotive radiators (have been used in that application for 15+ years)... this technology is definitely not new, but is just being introduced into the mainstream in our industry. I don't have anything on hand that is 'non-subjective', so I totally...

^^For examples, when I supply equipment up north (Oil Sands, H2S is common place), we typically epoxy-coat (or Heresite coat) the condenser coils, among other things.

^^ Couldn't hurt. I'd find it of use as well.

That letter was from November, 1998. You'll notice within the unit's Product Data that the 'typical refrig. charge' is about 62 lbs with 'standard' line lengths for that machine (38AH044). (See it here: http://www.docs.hvacpartners.com/idc/groups/public/documents/techlit/38ah-11pd.pdf Check...

Which unit are you referring to? From what you've already said, it appears to be at least a 10-Ton C/U (since that is the smallest C/U Carrier still offers with Semi-Hermetic's). Regarding Piping Sizing: Are you referencing Chapter 3 of the System Design Manual? I have done long lines...

- Inspect/clean/replace filters (usually monthly). - Clean the drain pipe (usually quarterly). - Clean the drain pan, and Evap. coil (usually annually). Hope that helps a little.

Carrier Block Load is great for basic CRU's, etc... HAP (Hourly Analysis Program) is much more advanced, but is highly favoured with many of my consultants. You can also design around different systems, and compare them.. (Splits, Pkg., CW, etc.). Here's an overview that explains a lot for...

That's unfortunate... I can't say we've had similar results. Do you feel the issues were directly related to the machines themselves, the selection, or how they were installed, started up, etc? Which ones... Centrif? Screw? Your feedback is appreciated... I'm sure the OP would be appreciative as...