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What's the deal with the 5-2-1 sizing?
For example, CSRU-1 is for "1-3 tons"
CSRU-2 is for 3.5 to 4-5 tons. So, 3.5 to 5 tons, but their labeling is weird.
On a 3 ton Copeland unit, is the CSRU-1 on the small size, and the 2 is on the big side? So, will either work? How does a 2 stage scroll which always starts in low stage play into it?
Single pipe quasi-vapor system. Typical operating pressure 0.14 - 0.43 oz. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment