The Lennox HS23-513-4Y is a 5-ton air conditioning unit. It is designed for residential or light commercial use. This particular model operates on a single-phase power supply, not a three-phase unit.
It looks to be a 10 SEER 4 ton R-22, 3 phase
The designation "hs23-311-5p" appears to reference a specific model or part number, but without additional context, it's difficult to determine its exact size. Typically, such designations could relate to various products, including electronic components or hardware. To find the precise size, it's best to consult the manufacturer's specifications or product datasheet associated with that part number.