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Does Mitsubishi HyperHeat minisplits come pre-charged?
rsilvers
Member Posts: 182
I got a quote for 11 units working from 4 condensers and the guy said he needed 25lbs of 410. Don't they come pre-charged? Perhaps you have to add a few oz to top off the lines?
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Comments
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Yeah, they're only pre-charged for a certain lineset length. Though...25lbs is a lot of refrigerant.
For reference, 36K BTU Fujitsu units come pre-charged with 8lbs. They're good for 240ft.
You should be able to find the submittal sheets for the Mitsubishi units online.0 -
Context, what model Mitsubishi? We routinely add 8 to 10 pounds on the bigger double deckers.1
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It totally depends on the matching indoor units, line set sizes and lengths and the capacity of the equipment. Mitsubishi has a program for calculating it or it can be done by hand, but it’s complex and critical that it’s done right. As Gary said, adding 8-10 pounds is typical on the larger units.Bob Boan
You can choose to do what you want, but you cannot choose the consequences.0 -
It is my understanding, once you go beyond 2 heads per condensing (outside ) units that is where the problems begin. Regardless of what you hear from the Salesman. Do your research first.Old retired Commercial HVAC/R guy in Iowa. Master electrician.0
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